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PCA9633
4-bit I2C-bus LED driver
Rev. 01 -- 23 January 2006 Product data sheet
1. General description
The PCA9633 is an I2C-bus controlled 4-bit LED driver optimized for Red/Green/Blue/Amber (RGBA) color mixing applications. Each LED output has its own 8-bit resolution (256 steps) fixed frequency Individual PWM controller that operates at 97 kHz with a duty cycle that is adjustable from 0 % to 99.6 % to allow the LED to be set to a specific brightness value. A fifth 8-bit resolution (256 steps) Group PWM controller has both a fixed frequency of 190 Hz and an adjustable frequency between 24 Hz to once every 10.73 seconds with a duty cycle that is adjustable from 0 % to 99.6 % that is used to either dim or blink all LEDs with the same value. Each LED output can be off, on (no PWM control), set at its Individual PWM controller value or at both Individual and Group PWM controller values. The LED output driver is programmed to be either open-drain with a 25 mA current sink capability at 5 V or totem-pole with a 25 mA sink, 10 mA source capability at 5 V. The PCA9633 operates with a supply voltage range of 2.3 V to 5.5 V and the outputs are 5.5 V tolerant. LEDs can be directly connected to the LED output (up to 25 mA, 5.5 V) or controlled with external drivers and a minimum amount of discrete components for larger current LEDs or higher voltage LED strings. The active LOW Output Enable input pin (OE) allows asynchronous control of the LED outputs and can be used to set all the outputs to a defined I2C-bus programmable logic state. The OE can also be used to externally PWM the outputs, which is useful when multiple devices need to be dimmed or blinked together using software control. This feature is available for the 16-pin version only. Software programmable LED Group and three Sub Call I2C addresses allow all or defined groups of PCA9633 devices to respond to a common I2C address, allowing for example, all red LEDs to be turned on or off at the same time or marquee chasing effect, thus minimizing I2C-bus commands. The PCA9633 is offered with 3 different I2C-bus address options: fixed I2C-bus address (8-pin version), 2 programmable I2C-bus addresses (10-pin version), and 7 programmable I2C-bus addresses (16-pin version). They are software identical except for the different number of address combinations. The Software Reset (SWRST) Call allows the master to perform a reset of the PCA9633 through the I2C-bus, identical to the Power-On Reset (POR) that initializes the registers to their default state causing the outputs to be set HIGH (LED off). This allows an easy and quick way to reconfigure all device registers to the same condition.
Philips Semiconductors
PCA9633
4-bit I2C-bus LED driver
2. Features
s 4 LED drivers. Each output programmable at: x Off x On x Programmable LED brightness x Programmable group dimming/blinking mixed with individual LED brightness s 1 MHz Fast mode compatible I2C-bus interface with 30 mA high drive capability on SDA output for driving high capacitive buses s 256-step (8-bit) linear programmable brightness per LED output varying from fully off (default) to maximum brightness using a 97 kHz PWM signal s 256-step group brightness control allows general dimming (using a 190 Hz PWM signal) from fully off to maximum brightness (default) s 256-step group blinking with frequency programmable from 24 Hz to 10.73 s and duty cycle from 0 % to 99.6 % s Four totem-pole outputs (sink 25 mA and source 10 mA at 5 V) with software programmable open-drain LED outputs selection (default at totem-pole). No input function. s Output state change programmable on the Acknowledge or the STOP Command to update outputs byte-by-byte or all at the same time (default to `Change on STOP'). s Active LOW Output Enable (OE) input pin. LED outputs programmable to `1', `0' or `high-impedance' (default at power-up) when OE is HIGH, thus allowing hardware blinking and dimming of the LEDs (16-pin version only). s 2 hardware address pins (10-pin version) and 7 hardware address pins (16-pin version) allow respectively up to 4 and 127 PCA9633 devices to be connected to the same I2C-bus. No hardware address pins in the 8-pin version. s 4 software programmable I2C-bus addresses (one LED Group Call address and three LED Sub Call addresses) allow groups of devices to be addressed at the same time in any combination (for example, one register used for `All Call' so that all the PCA9633s on the I2C-bus can be addressed at the same time and the second register used for three different addresses so that 13 of all devices on the bus can be addressed at the same time in a group). Software enable and disable for I2C-bus address. s Software Reset feature (SWRST Call) allows the device to be reset through the I2C-bus s Up to 126 possible hardware adjustable individual I2C-bus addresses per device so that each device can be programmed individually. s 25 MHz internal oscillator requires no external components s Internal power-on reset s Noise filter on SDA/SCL inputs s Edge rate control on outputs s No glitch on power-up s Supports hot insertion s Low standby current s Operating power supply voltage range of 2.3 V to 5.5 V s 5.5 V tolerant inputs s -40 C to +85 C operation
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Product data sheet
Rev. 01 -- 23 January 2006
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Philips Semiconductors
PCA9633
4-bit I2C-bus LED driver
s ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101 s Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA s Packages offered: SO, TSSOP (MSOP), HVQFN, HVSON
3. Applications
s s s s s s RGB or RGBA LED drivers Decorative LED lighting LED status information LED displays LCD backlights Keypad backlights for cellular phones or handheld devices
4. Ordering information
Table 1: Ordering information Topside mark PCA9633 9633 9633 PCA9633 9633 9633 Package Name SO16 TSSOP8 TSSOP10 TSSOP16 HVQFN16 HVSON8 Description plastic small outline package; 16 leads; body width 3.9 mm plastic thin shrink small outline package; 8 leads; body width 3 mm plastic thin shrink small outline package; 10 leads; body width 3 mm plastic thin shrink small outline package; 16 leads; body width 4.4 mm Version SOT109-1 SOT505-1 SOT552-1 SOT403-1 Type number PCA9633D16 PCA9633DP1 PCA9633DP2 PCA9633PW PCA9633BS PCA9633TK
plastic thermal enhanced very thin quad flat package; no leads; SOT629-1 16 terminals; body 4 x 4 x 0.85 mm plastic thermal enhanced very thin small outline package; no leads; 8 terminals; body 3 x 3 x 0.85 mm SOT908-1
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Product data sheet
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Philips Semiconductors
PCA9633
4-bit I2C-bus LED driver
5. Block diagram
16-pin version 10-pin version A0 A1 A2 A3 A4 A5 A6
PCA9633
SCL SDA I2C-BUS CONTROL VDD VSS LED STATE SELECT REGISTER PWM REGISTER X BRIGHTNESS CONTROL POWER-ON RESET INPUT FILTER
VDD
LEDn
97 kHz 25 MHz OSCILLATOR
24.3 kHz
GRPFREQ REGISTER
MUX/ CONTROL GRPPWM REGISTER '0' - permanently OFF '1' - permanently ON
190 Hz
OE (16-pin version only)
002aab283
Fig 1. Block diagram of PCA9633
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Product data sheet
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PCA9633
4-bit I2C-bus LED driver
6. Pinning information
6.1 Pinning
LED0 LED1 LED2 LED3
1 2 3 4
002aab314
8 7
VDD SDA SCL VSS
LED0 LED1 LED2 LED3 A0
1 2 3 4 5
002aab315
10 VDD 9 SDA
PCA9633DP1
PCA9633DP2
8 7 6
SCL A1 VSS
6 5
Fig 2. Pin configuration for TSSOP8
Fig 3. Pin configuration for TSSOP10
A0 A1 A0 A1 LED0 LED1 LED2 LED3 A2 A3 1 2 3 4 5 6 7 8
002aab316
1 2 3 4
16 VDD 15 A6 14 A5 13 SDA
16 VDD 15 A6 14 A5 13 SDA 12 SCL 11 A4 10 OE 9 VSS
LED0 LED1 LED2 LED3 A2 A3
PCA9633D16
5 6 7 8
002aab313
12 SCL 11 A4 10 OE 9 VSS
PCA9633PW
Fig 4. Pin configuration for TSSOP16
16 A1 15 A0 13 A6 terminal 1 index area 14 VDD
Fig 5. Pin configuration for SO16
terminal 1 index area 12 A5 LED0 11 SDA 1 2 8 7 VDD SDA SCL VSS
LED0 LED1 LED2 LED3
1 2
PCA9633BS
3 4 5 6 7 8 10 SCL 9 A4
LED1 LED2 LED3
PCA9633TK
3 4 6 5
A2
A3
VSS
OE
002aab317
002aab807
Transparent top view
Transparent top view
Fig 6. Pin configuration for HVQFN16
Fig 7. Pin configuration for HVSON8
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Product data sheet
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PCA9633
4-bit I2C-bus LED driver
6.2 Pin description
Table 2: Symbol LED0 LED1 LED2 LED3 VSS SCL SDA VDD Table 3: Symbol LED0 LED1 LED2 LED3 A0 VSS A1 SCL SDA VDD Pin description for TSSOP8 and HVSON8 Pin 1 2 3 4 5 6 7 8 Type O O O O power supply I I/O power supply Description LED driver 0 LED driver 1 LED driver 2 LED driver 3 supply ground serial clock line serial data line supply voltage
Pin description for TSSOP10 Pin 1 2 3 4 5 6 7 8 9 10 Type O O O O I power supply I I I/O power supply Description LED driver 0 LED driver 1 LED driver 2 LED driver 3 address input 0 supply ground address input 1 serial clock line serial data line supply voltage
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Product data sheet
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PCA9633
4-bit I2C-bus LED driver
Pin description for SO16 and TSSOP16 Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Type I I O O O O I I power supply I I I I/O I I power supply Description address input 0 address input 1 LED driver 0 LED driver 1 LED driver 2 LED driver 3 address input 2 address input 3 supply ground active LOW Output Enable address input 4 serial clock line serial data line address input 5 address input 6 supply voltage
Table 4: Symbol A0 A1 LED0 LED1 LED2 LED3 A2 A3 VSS OE A4 SCL SDA A5 A6 VDD Table 5: Symbol LED0 LED1 LED2 LED3 A2 A3 VSS OE A4 SCL SDA A5 A6 VDD A0 A1
[1]
[1]
Pin description for HVQFN16 Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Type O O O O I I power supply I I I I/O I I power supply I I Description LED driver 0 LED driver 1 LED driver 2 LED driver 3 address input 2 address input 3 supply ground active LOW Output Enable address input 4 serial clock line serial data line address input 5 address input 6 supply voltage address input 0 address input 1
HVQFN package die supply ground is connected to both the VSS pin and the exposed center pad. The VSS pin must be connected to supply ground for proper device operation. For enhanced thermal, electrical, and board-level performance, the exposed pad needs to be soldered to the board using a corresponding thermal pad on the board, and for proper heat conduction through the board thermal vias need to be incorporated in the PCB in the thermal pad region.
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Product data sheet
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PCA9633
4-bit I2C-bus LED driver
7. Functional description
Refer to Figure 1 "Block diagram of PCA9633".
7.1 Device addresses
Following a START condition, the bus master must output the address of the slave it is accessing.
7.1.1 Regular I2C-bus slave address
The I2C-bus slave address of the PCA9633 is shown in Figure 8. To conserve power, no internal pull-up resistors are incorporated on the hardware selectable address pins and they must be pulled HIGH or LOW (10-pin and 16-pin versions).
CAUTION For the 16-pin version, reserved I2C-bus addresses must be used with caution since they can interfere with:
MSC895
* * * *
`reserved for future use' I2C-bus addresses (0000011, 11111XX) slave devices that use the 10-bit addressing scheme (11110XX) slave devices that are designed to respond to the General Call address (0000000) High-speed mode (Hs-mode) master code (00001XX).
slave address 1 1 0 0 fixed 0 1 0 R/W 1 1
slave address 0 fixed 0 0 A1 A0 R/W A6 A5
slave address A4 A3 A2 A1 A0 R/W
002aab318
hardware selectable
002aab295
hardware selectable
002aab319
a. 8-pin version Fig 8. Slave address
b. 10-pin version
c. 16-pin version
The last bit of the address byte defines the operation to be performed. When set to logic 1 a read is selected, while a logic 0 selects a write operation.
7.1.2 LED All Call I2C-bus address
* Default power-up value (ALLCALLADR register): 0xE0 or 1110000 * Programmable through I2C-bus (volatile programming) * At power-up, LED All Call I2C-bus address is enabled. PCA9633 sends an ACK when
0xE0 (R/W = 0) or 0xE1 (R/W = 1) is sent by the master. See Section 7.3.8 "LED All Call I2C-bus address, ALLCALLADR" for more detail.
CAUTION The default LED All Call I2C-bus address (0xE0 or 1110000) must not be used as a regular I2C-bus slave address since this address is enabled at power-up. All the PCA9633s on the I2C-bus will acknowledge the address if sent by the I2C-bus master.
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MSC895
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PCA9633
4-bit I2C-bus LED driver
7.1.3 LED Sub Call I2C-bus addresses
* 3 different I2C-bus addresses can be used * Default power-up values:
- SUBADR1 register: 0xE2 or 1110001 - SUBADR2 register: 0xE4 or 1110010 - SUBADR2 register: 0xE8 or 1110100
* Programmable through I2C-bus (volatile programming) * At power-up, Sub Call I2C-bus addresses are disabled. PCA9633 does not send an
ACK when 0xE2 (R/W = 0) or 0xE3 (R/W = 1), 0xE4 (R/W = 0) or 0xE5 (R/W = 1), or 0xE8 (R/W = 0) or 0xE9 (R/W = 1) is sent by the master. See Section 7.3.7 "I2C-bus sub-address 1 to 3, SUBADRx" for more detail.
CAUTION The default LED Sub Call I2C-bus addresses may be used as regular I2C-bus slave addresses as long as they are disabled.
MSC895
7.1.4 Software Reset I2C-bus address
The address shown in Figure 9 is used when a reset of the PCA9633 needs to be performed by the master. The Software Reset address (SWRST Call) must be used with R/W = 0. If R/W = 1, the PCA9633 does not acknowledge the SWRST. See Section 7.6 "Software Reset" for more detail.
R/W 0 0 0 0 0 1 1 0
002aab416
Fig 9. Software Reset address
CAUTION The Software Reset I2C-bus address is a reserved address and cannot be used as a regular I2C-bus slave address (16-pin version) or as an LED All Call or LED Sub Call address.
MSC895
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PCA9633
4-bit I2C-bus LED driver
7.2 Control register
Following the successful acknowledgement of the slave address, LED All Call address or LED Sub Call address, the bus master will send a byte to the PCA9633, which will be stored in the Control register. The lowest 4 bits are used as a pointer to determine which register will be accessed (D[3:0]). The highest 3 bits are used as Auto-Increment flag and Auto-Increment options (AI[2:0]). Bit 4 is unused and must be programmed with zero (`0') for proper device operation.
register address AI2 AI1 AI0 0 D3 D2 D1 D0
002aab296
Auto-Increment options Auto-Increment flag
reset state = 80h Remark: The Control register does not apply to the Software Reset I2C-bus address.
Fig 10. Control register
When the Auto-Increment flag is set (AI2 = 1), the four low order bits of the Control register are automatically incremented after a read or write. This allows the user to program the registers sequentially. Four different types of Auto-Increment are possible, depending on AI1 and AI0 values.
Table 6: AI2 0 1 1 1 1 0 0 0 1 1 Auto-Increment options AI1 AI0 0 0 1 0 1 Function no Auto-Increment Auto-Increment for all registers. D3, D2, D1, D0 roll over to `0000' after the last register (1100) is accessed. Auto-Increment for individual brightness registers only. D3, D2, D1, D0 roll over to `0010' after the last register (0101) is accessed. Auto-Increment for global control registers only. D3, D2, D1, D0 roll over to `0110' after the last register (0111) is accessed. Auto-Increment for individual and global control registers only. D3, D2, D1, D0 roll over to `0010' after the last register (0111) is accessed.
Remark: Other combinations not shown in Table 6 (AI[2:0] = 001, 010, and 011) are reserved and must not be used for proper device operation. AI[2:0] = 000 is used when the same register must be accessed several times during a single I2C-bus communication, for example, changes the brightness of a single LED. Data is overwritten each time the register is accessed during a write operation. AI[2:0] = 100 is used when all the registers must be sequentially accessed, for example, power-up programming. AI[2:0] = 101 is used when the four LED drivers must be individually programmed with different values during the same I2C-bus communication, for example, changing color setting to another color setting.
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PCA9633
4-bit I2C-bus LED driver
AI[2:0] = 110 is used when the LED drivers must be globally programmed with different settings during the same I2C-bus communication, for example, global brightness or blinking change. AI[2:0] = 111 is used when individual and global changes must be performed during the same I2C-bus communication, for example, changing a color and global brightness at the same time. Only the 4 least significant bits D[3:0] are affected by the AI[2:0] bits. When the Control register is written, the register entry point determined by D[3:0] is the first register that will be addressed (read or write operation), and can be anywhere between 0000 and 1100 (as defined in Table 7). When AI[2] = 1, the Auto-Increment flag is set and the rollover value at which the point where the register increment stops and goes to the next one is determined by AI[2:0]. See Table 6 for rollover values. For example, if the Control register = 11101000 (0xE8), then the register addressing sequence will be (in hex): 08 ... 0C 00 ... 07 02 ... 07 02 ... 07 02 ... as long as the master keeps sending or reading data.
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PCA9633
4-bit I2C-bus LED driver
7.3 Register definitions
Table 7: 00 01 02 03 04 05 06 07 08 09 0A 0B 0C
[1] [2]
Register summary [1] [2] D3 0 0 0 0 0 0 0 0 1 1 1 1 1 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 D0 0 1 0 1 0 1 0 1 0 1 0 1 0 Name MODE1 MODE2 PWM0 PWM1 PWM2 PWM3 GRPPWM GRPFREQ LEDOUT SUBADR1 SUBADR2 SUBADR3 ALLCALLADR Type read/write read/write read/write read/write read/write read/write read/write read/write read/write read/write read/write read/write read/write Function Mode register 1 Mode register 2 brightness control LED0 brightness control LED1 brightness control LED2 brightness control LED3 group duty cycle control group frequency LED output state I2C-bus sub-address 1 I2C-bus sub-address 2 I2C-bus sub-address 3 LED All Call I2C-bus address
Register number (hex)
Only D[3:0] = 0000 to 1100 are allowed and will be acknowledged. D[3:0] = 1101, 1110, or 1111 are reserved and will not be acknowledged. When writing to the Control register, bit 4 must be programmed with `0' for proper device operation.
7.3.1 Mode register 1, MODE1
Table 8: MODE1 - Mode register 1(address 00h) bit description Legend: * default value Bit 7 6 5 4 3 2 1 0 Symbol AI2 AI1 AI0 SLEEP SUB1 SUB2 SUB3 ALLCALL Access read only read only read only R/W R/W R/W R/W R/W Value 0 1* 0* 1 0* 1 0 1* 0* 1 0* 1 0* 1 0 1*
[1] [2]
Description Register Auto-Increment disabled Register Auto-Increment enabled Auto-Increment bit 1 = 0 Auto-Increment bit 1 = 1 Auto-Increment bit 0 = 0 Auto-Increment bit 0 = 1 Normal mode. [1] Low power mode. Oscillator off. [2] PCA9633 does not respond to I2C-bus sub-address 1. PCA9633 responds to I2C-bus sub-address 1. PCA9633 does not respond to I2C-bus sub-address 2. PCA9633 responds to I2C-bus sub-address 2. PCA9633 does not respond to I2C-bus sub-address 3. PCA9633 responds to I2C-bus sub-address 3. PCA9633 does not respond to LED All Call I2C-bus address. PCA9633 responds to LED All Call I2C-bus address.
It takes 500 s max. for the oscillator to be up and running once SLEEP bit has been set to `1'. Timings on LEDn outputs are not guaranteed if PWMx, GRPPWM or GRPFREQ registers are accessed within the 500 s window. No blinking or dimming is possible when the oscillator is off.
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PCA9633
4-bit I2C-bus LED driver
7.3.2 Mode register 2, MODE2
Table 9: MODE2 - Mode register 2 (address 01h) bit description Legend: * default value Bit 7 6 5 4 Symbol DMBLNK INVRT [1] Access read only read only R/W R/W Value 0* 0* 0* 1 0* 1 3 2 1 to 0 OCH OUTDRV [1] OUTNE[1:0]
[3] [4]
Description reserved reserved Group control = dimming Group control = blinking Output logic state not inverted. Value to use when no external driver used. Applicable when OE = 0 for PCA9633 16-pin version. Output logic state inverted. Value to use when external driver used. Applicable when OE = 0 for PCA9633 16-pin version. Outputs change on STOP command. [2] Outputs change on ACK. The 4 LED outputs are configured with an open-drain structure. The 4 LED outputs are configured with a totem-pole structure. When OE = 1 (output drivers not enabled), LEDn = 0. When OE = 1 (output drivers not enabled): LEDn = 1 when OUTDRV = 1 LEDn = high-impedance when OUTDRV = 0 (same as OUTNE[1:0] = 10)
R/W R/W R/W
0* 1 0 1* 00 01*
10 11
[1] [2] [3] [4]
When OE = 1 (output drivers not enabled), LEDn = high-impedance. reserved
See Section 7.7 "Using the PCA9633 with and without external drivers" for more details. Change of the outputs at the STOP command allows synchronizing outputs of more than one PCA9633. Applicable to registers from 0x02 (PWM0) to 0x08 (LEDOUT) only. See Section 7.4 "Active LOW output enable input" for more details. OUTNE[1:0] is only for PCA9633 16-pin version.
7.3.3 PWM registers 0 to 3, PWMx--Individual brightness control registers
Table 10: PWM0 to PWM3 - PWM registers 0 to 3 (address 02h to 05h) bit description Legend: * default value Address 02h 03h 04h 05h Register PWM0 PWM1 PWM2 PWM3 Bit 7:0 7:0 7:0 7:0 Symbol IDC0[7:0] IDC1[7:0] IDC2[7:0] IDC3[7:0] Access Value R/W R/W R/W R/W 00000000* 00000000* 00000000* 00000000* Description PWM0 Individual Duty Cycle PWM1 Individual Duty Cycle PWM2 Individual Duty Cycle PWM3 Individual Duty Cycle
A 97 kHz fixed frequency signal is used for each output. Duty cycle is controlled through 256 linear steps from 0x00 (0 % duty cycle = LED output off) to 0xFF (99.6 % duty cycle = LED output at maximum brightness). Applicable to LED outputs programmed with LDRx = 10 or 11 (LEDOUT register). IDC[7:0] duty cycle = --------------------256
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PCA9633
4-bit I2C-bus LED driver
7.3.4 Group duty cycle control, GRPPWM
Table 11: GRPPWM - Group brightness control register (address 06h) bit description Legend: * default value Address 06h Register GRPPWM Bit 7:0 Symbol GDC[7:0] Access R/W Value 11111111 Description GRPPWM register
When DMBLNK bit (MODE2 register) is programmed with `0', a 190 Hz fixed frequency signal is superimposed with the 97 kHz individual brightness control signal. GRPPWM is then used as a global brightness control allowing the LED outputs to be dimmed with the same value. The value in GRPFREQ is then a `Don't care'. General brightness for the 4 outputs is controlled through 256 linear steps from 0x00 (0 % duty cycle = LED output off) to 0xFF (99.6 % duty cycle = maximum brightness). Applicable to LED outputs programmed with LDRx = 11 (LEDOUT register). When DMBLNK bit is programmed with `1', GRPPWM and GRPFREQ registers define a global blinking pattern, where GRPFREQ contains the blinking period (from 24 Hz to 10.73 s) and GRPPWM the duty cycle (ON/OFF ratio in %). GDC[7:0] duty cycle = ----------------------256
7.3.5 Group frequency, GRPFREQ
Table 12: GRPFREQ - Group Frequency register (address 07h) bit description Legend: * default value Address 07h Register GRPFREQ Bit 7:0 Symbol GFRQ[7:0] Access R/W Value 00000000* Description GRPFREQ register
GRPFREQ is used to program the global blinking period when DMBLNK bit (MODE2 register) is equal to `1'. Value in this register is a `Don't care' when DMBLNK = 0. Applicable to LED outputs programmed with LDRx = 11 (LEDOUT register). Blinking period is controlled through 256 linear steps from 0x00 (41 ms, frequency 24 Hz) to 0xFF (10.73 s). GFRQ[7:0] + 1 global blinking period = ------------------------------------ (in seconds) 24
7.3.6 LED driver output state, LEDOUT
Table 13: LEDOUT - LED driver output state register (address 08h) bit description Legend: * default value Address 08h Register LEDOUT Bit 7:6 5:4 3:2 1:0 Symbol LDR3 LDR2 LDR1 LDR0 Access R/W R/W R/W R/W Value 00* 00* 00* 00* Description LED3 output state control LED2 output state control LED1 output state control LED0 output state control
LDRx = 00 -- LED driver x is off (default power-up state). LDRx = 01 -- LED driver x is fully on (individual brightness and group dimming/blinking not controlled).
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PCA9633
4-bit I2C-bus LED driver
LDRx = 10 -- LED driver x individual brightness can be controlled through its PWMx register. LDRx = 11 -- LED driver x individual brightness and group dimming/blinking can be controlled through its PWMx register and the GRPPWM registers.
7.3.7 I2C-bus sub-address 1 to 3, SUBADRx
SUBADR1 to SUBADR3 - I2C-bus sub-address registers 0 to 3 (address 09h to 0Bh) bit description Legend: * default value Table 14: Address 09h 0Ah 0Bh Register SUBADR1 SUBADR2 SUBADR3 Bit 7:1 0 7:1 0 7:1 0 Symbol A1[7:1] A1[0] A2[7:1] A2[0] A3[7:1] A3[0] Access Value R/W R only R/W R only R/W R only 1110001* 0* 1110010* 0* 1110100* 0* Description I2C-bus sub-address 1 reserved I2C-bus sub-address 2 reserved I2C-bus sub-address 3 reserved
Sub-addresses are programmable through the I2C-bus. Default power-up values are 0xE2, 0xE4, 0xE8, and the device(s) will not acknowledge these addresses right after power-up (the corresponding SUBx bit in MODE1 register is equal to `0'). Once sub-addresses have been programmed to their right values, SUBx bits need to be set to `1' in order to have the device acknowledging these addresses (MODE1 register). Only the 7 MSBs representing the I2C-bus sub-address are valid. The LSB in SUBADRx register is a read-only bit (`0'). When SUBx is set to `1', the corresponding I2C-bus sub-address can be used during either an I2C-bus read or write sequence.
7.3.8 LED All Call I2C-bus address, ALLCALLADR
ALLCALLADR - LED All Call I2C-bus address register (address 0Ch) bit description Legend: * default value Table 15: Address 0Ch Register ALLCALLADR Bit 7:1 0 Symbol AC[7:1] AC[0] Access Value R/W R only 1110000* 0* Description ALLCALL I2C-bus address register reserved
The LED All Call I2C-bus address allows all the PCA9633s in the bus to be programmed at the same time (ALLCALL bit in register MODE1 must be equal to `1'--power-up default state). This address is programmable through the I2C-bus and can be used during either an I2C-bus read or write sequence. Only the 7 MSBs representing the All Call I2C-bus address are valid. The LSB in ALLCALLADR register is a Read-only bit (`0'). If ALLCALL bit = 0, the device does not acknowledge the address programmed in register ALLCALLADR.
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PCA9633
4-bit I2C-bus LED driver
7.4 Active LOW output enable input
The active LOW output enable (OE) pin, allows to enable or disable all the LED outputs at the same time. This control signal is only available for the 16-pin version and does not apply to the 8-pin or 10-pin versions.
* When a LOW level is applied to OE pin, all the LED outputs are enabled and follow the
output state defined in the LEDOUT register with the polarity defined by INVRT bit (MODE2 register).
* When a HIGH level is applied to OE pin, all the LED outputs are programmed to the
value that is defined by OUTNE[1:0] in the MODE2 register.
Table 16: OUTNE1 0 0 1 1 LED outputs when OE = 1 OUTNE0 0 1 0 1 LED outputs 0 1 if OUTDRV = 1, high-impedance if OUTDRV = 0 high-impedance reserved
The OE pin can be used as a synchronization signal to switch on/off several PCA9633 devices at the same time. This requires an external clock reference that provides blinking period and the duty cycle. The OE pin can also be used as an external dimming control signal. The frequency of the external clock must be high enough not to be seen by the human eye, and the duty cycle value determines the brightness of the LEDs.
CAUTION Do not use OE as an external blinking control signal when internal global blinking is selected (DMBLNK = 1, MODE2 register) since it will result in an undefined blinking pattern. Do not use OE as an external dimming control signal when internal global dimming is selected (DMBLNK = 0, MODE2 register) since it will result in an undefined dimming pattern.
MSC895
7.5 Power-on reset
When power is applied to VDD, an internal Power-on reset holds the PCA9633 in a reset condition until VDD has reached VPOR. At this point, the reset condition is released and the PCA9633 registers and I2C-bus state machine are initialized to their default states--all zeroes--causing all the channels to be deselected. Thereafter, VDD must be lowered below 0.2 V to reset the device.
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PCA9633
4-bit I2C-bus LED driver
7.6 Software Reset
The Software Reset Call (SWRST Call) allows all the devices in the I2C-bus to be reset to the power-up state value through a specific formatted I2C-bus command. To be performed correctly, it implies that the I2C-bus is functional and that there is no device hanging the bus. The SWRST Call function is defined as the following: 1. A START command is sent by the I2C-bus master. 2. The reserved SWRST I2C-bus address `0000011' with the R/W bit set to `0' (write) is sent by the I2C-bus master. 3. The PCA9633 device(s) acknowledge(s) after seeing the SWRST Call address `00000110' (0x06) only. If the R/W bit is set to `1' (read), no acknowledge is returned to the I2C-bus master. 4. Once the SWRST Call address has been sent and acknowledged, the master sends 2 bytes with 2 specific values (SWRST data byte 1 and byte 2): a. Byte 1 = 0xA5: the PCA9633 acknowledges this value only. If byte 1 is not equal to 0xA5, the PCA9633 does not acknowledge it. b. Byte 2 = 0x5A: the PCA9633 acknowledges this value only. If byte 2 is not equal to 0x5A, then the PCA9633 does not acknowledge it. If more than 2 bytes of data are sent, the PCA9633 does not acknowledge any more. 5. Once the right 2 bytes (SWRST data byte 1 and byte 2 only) have been sent and correctly acknowledged, the master sends a STOP command to end the SWRST Call: the PCA9633 then resets to the default value (power-up value) and is ready to be addressed again within the specified bus free time (tBUF). The I2C-bus master must interpret a non-acknowledge from the PCA9633 (at any time) as a `SWRST Call Abort'. The PCA9633 does not initiate a reset of its registers. This happens only when the format of the SWRST Call sequence is not correct.
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PCA9633
4-bit I2C-bus LED driver
7.7 Using the PCA9633 with and without external drivers
The PCA9633 LED output drivers are 5.5 V only tolerant and can sink up to 25 mA at 5 V. If the device needs to drive LEDs to a higher voltage and/or higher current, use of an external driver is required.
* INVRT bit (MODE2 register) can be used to keep the LED PWM control firmware the
same (PWMx and GRPPWM values directly calculated from their respective formulas and the LED output state determined by LEDOUT register value) independently of the type of external driver. This bit allows LED output polarity inversion/non-inversion only when OE = 0.
* OUTDRV bit (MODE2 register) allows minimizing the amount of external components
required to control the external driver (N-type or P-type device).
Table 17: Use of INVRT and OUTDRV based on connection to the LEDn outputs when OE = 0 [1] External N-type driver Firmware External pull-up resistor External P-type driver Firmware External pull-up resistor Firmware External pull-up resistor
INVRT OUTDRV Direct connection to LEDn
0
0
formulas and LED output state values apply [2] formulas and LED output state values apply [2] formulas and LED output state values inverted formulas and LED output state values inverted
LED current formulas and LED required limiting R [2] output state values inverted
formulas and LED required output state values apply
0
1
LED current formulas and LED not required formulas and LED not limiting R [2] output state output state values required [4] values inverted apply [4] LED current formulas and LED required limiting R output state values apply LED current formulas and LED not limiting R output state required [3] [3] values apply formulas and LED required output state values inverted formulas and LED not required output state values inverted
1
0
1
1
[1] [2] [3] [4]
OE applies to 16-pin version only. When OE = 1, LED output state is controlled only by OUTNE[1:0] bits (MODE2 register). Correct configuration when LEDs directly connected to the LEDn outputs (connection to VDD through current limiting resistor). Optimum configuration when external N-type (NPN, NMOS) driver used. Optimum configuration when external P-type (PNP, PMOS) driver used.
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PCA9633
4-bit I2C-bus LED driver
Table 18: LEDOUT 00
Output transistors based on LEDOUT registers, INVRT and OUTDRV bits when OE = 0 [1] INVRT 0 0 1 1 OUTDRV 0 1 0 1 0 1 0 1 0 1 0 1 0 Upper transistor Lower transistor (VDD to LEDn) (LEDn to VSS) off on off off off off off on off Individual PWM (non-inverted) off Individual PWM (inverted) off off off on on on on off off Individual PWM (non-inverted) Individual PWM (non-inverted) Individual PWM (inverted) Individual PWM (inverted) LEDn state high-Z [2] VDD VSS VSS VSS VSS high-Z [2] VDD VSS/high-Z [2] = PWMx value VSS/VDD = PWMx value high-Z [2]/VSS = 1 - PWMx value VDD/VSS = 1 - PWMx value
LED driver off
01 LED driver on
0 0 1 1
10 Individual brightness control
0 0 1 1
11
0
Individual + Group dimming/blinking 0 1 1
Individual + Group VSS/high-Z [2] = PWMx/GRPPWM values PWM (non-inverted) Individual PWM (non-inverted) VSS/VDD = PWMx/GRPPWM values
1 0 1
Individual PWM (non-inverted) off Individual PWM (inverted)
Individual + Group high-Z [2]/VSS = (1 - PWMx)/(1 - GRPPWM) values PWM (inverted) Individual PWM (inverted) VDD/VSS = (1 - PWMx)/(1 - GRPPWM) values
[1] [2]
OE applies to 16-pin version only. When OE = 1, LED output state is controlled only by OUTNE[1:0] bits (MODE2 register). External pull-up or LED current limiting resistor connects LEDn to VDD.
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PCA9633
4-bit I2C-bus LED driver
7.8 Individual brightness control with group dimming/blinking
A 97 kHz fixed frequency signal with programmable duty cycle (8 bits, 256 steps) is used to control individually the brightness for each LED. On top of this signal, one of the following signals can be superimposed (this signal can be applied to the 4 LED outputs):
* A lower 190 Hz fixed frequency signal with programmable duty cycle (8 bits,
256 steps) is used to provide a global brightness control.
* A programmable frequency signal from 24 Hz to 110.73 s (8 bits, 256 steps) with
programmable duty cycle (8 bits, 256 steps) is used to provide a global blinking control.
1
2
3
4
5
6
7
8
9 10 11 12
507
508
509
510
511
512
1
2
3
4
5
6
7
8
9 10 11
Brightness Control signal (LEDn) N x 40 ns with N = (0 to 255) (PWMx Register) 256 x 40 ns = 10.24 s (97.6 kHz)
M x 256 x 2 x 40 ns with M = (0 to 255) (GRPPWM Register)
Group Dimming signal 256 x 2 x 256 x 40 ns = 5.24 ms (190.7 Hz) 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8
resulting Brightness + Group Dimming signal
002aab417
Minimum pulse width for LEDn Brightness Control is 40 ns. Minimum pulse width for Group Dimming is 20.48 s. When M = 1 (GRPPWM register value), the resulting LEDn Brightness Control + Group Dimming signal will have 2 pulses of the LED Brightness Control signal (pulse width = N x 40 ns, with `N' defined in PWMx register). This resulting Brightness + Group Dimming signal above shows a resulting Control signal with M = 4 (8 pulses).
Fig 11. Brightness + Group Dimming signals
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PCA9633
4-bit I2C-bus LED driver
8. Characteristics of the I2C-bus
The I2C-bus is for 2-way, 2-line communication between different ICs or modules. The two lines are a serial data line (SDA) and a serial clock line (SCL). Both lines must be connected to a positive supply via a pull-up resistor when connected to the output stages of a device. Data transfer may be initiated only when the bus is not busy.
8.1 Bit transfer
One data bit is transferred during each clock pulse. The data on the SDA line must remain stable during the HIGH period of the clock pulse as changes in the data line at this time will be interpreted as control signals (see Figure 12).
SDA
SCL data line stable; data valid change of data allowed
mba607
Fig 12. Bit transfer
8.1.1 START and STOP conditions
Both data and clock lines remain HIGH when the bus is not busy. A HIGH-to-LOW transition of the data line while the clock is HIGH is defined as the START condition (S). A LOW-to-HIGH transition of the data line while the clock is HIGH is defined as the STOP condition (P) (see Figure 13.)
SDA
SDA
SCL S START condition P STOP condition
SCL
mba608
Fig 13. Definition of START and STOP conditions
8.2 System configuration
A device generating a message is a `transmitter'; a device receiving is the `receiver'. The device that controls the message is the `master' and the devices which are controlled by the master are the `slaves' (see Figure 14).
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PCA9633
4-bit I2C-bus LED driver
SDA SCL MASTER TRANSMITTER/ RECEIVER SLAVE RECEIVER SLAVE TRANSMITTER/ RECEIVER MASTER TRANSMITTER MASTER TRANSMITTER/ RECEIVER I2C-BUS MULTIPLEXER
SLAVE
002aaa966
Fig 14. System configuration
8.3 Acknowledge
The number of data bytes transferred between the START and the STOP conditions from transmitter to receiver is not limited. Each byte of eight bits is followed by one acknowledge bit. The acknowledge bit is a HIGH level put on the bus by the transmitter, whereas the master generates an extra acknowledge related clock pulse. A slave receiver which is addressed must generate an acknowledge after the reception of each byte. Also a master must generate an acknowledge after the reception of each byte that has been clocked out of the slave transmitter. The device that acknowledges has to pull down the SDA line during the acknowledge clock pulse, so that the SDA line is stable LOW during the HIGH period of the acknowledge related clock pulse; set-up time and hold time must be taken into account. A master receiver must signal an end of data to the transmitter by not generating an acknowledge on the last byte that has been clocked out of the slave. In this event, the transmitter must leave the data line HIGH to enable the master to generate a STOP condition.
data output by transmitter not acknowledge data output by receiver acknowledge SCL from master S START condition 1 2 8 clock pulse for acknowledgement
002aaa987
9
Fig 15. Acknowledgement on the I2C-bus
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PCA9633
4-bit I2C-bus LED driver
9. Bus transactions
slave address(1) S A6 A5 A4 A3 A2 A1 A0 0 START condition R/W A X X data for register D3, D2, D1, D0(2) A acknowledge from slave STOP condition
002aab418
control register X 0 D3 D2 D1 D0 A
P
Auto-Increment options Auto-Increment flag acknowledge from slave
acknowledge from slave
(1) 16-pin version only. (2) See Table 7 for register definition.
Fig 16. Write to a specific register
slave address(1) S A6 A5 A4 A3 A2 A1 A0 0 START condition R/W acknowledge from slave SUBADR3 register (cont.) A acknowledge from slave A 1 0
control register 0 0 0 0 0 0 A
MODE1 register A acknowledge from slave
MODE2 register A acknowledge from slave (cont.)
Auto-Increment on all registers Auto-Increment on
MODE1 register selection
acknowledge from slave
ALLCALLADR register A acknowledge from slave STOP condition
002aab419
P
(1) 16-pin version only.
Fig 17. Write to all registers using the Auto-Increment feature
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PCA9633
4-bit I2C-bus LED driver
slave address(1) S A6 A5 A4 A3 A2 A1 A0 0 START condition R/W acknowledge from slave PWM2 register (cont.) A acknowledge from slave A 1 0
control register 1 0 0 0 1 0 A
PWM0 register A acknowledge from slave
PWM1 register A acknowledge from slave (cont.)
increment on Individual brightness registers only Auto-Increment on
PWM0 register selection
acknowledge from slave
PWM3 register A acknowledge from slave
PWM0 register A acknowledge from slave
PWMx register A acknowledge from slave STOP condition
002aab420
P
(1) 16-pin version only.
Fig 18. Multiple writes to Individual Brightness registers only using the Auto-Increment feature
slave address(1) S A6 A5 A4 A3 A2 A1 A0 0 START condition R/W acknowledge from slave A 1 0
control register 0 0 0 0 0 0
ReSTART condition
slave address(1) A
data from MODE1 register A (cont.) acknowledge from master
A Sr A6 A5 A4 A3 A2 A1 A0 1 acknowledge from slave R/W
Auto-Increment on all registers Auto-Increment on
MODE1 register selection
acknowledge from slave data from MODE1 register A
data from MODE2 register (cont.) A
data from PWM0 A
data from ALLCALLADR register
A (cont.)
acknowledge from master data from last read byte (cont.) A P
acknowledge from master
acknowledge from master
acknowledge from master
not acknowledge from master
STOP condition
002aab423
(1) 16-pin version only.
Fig 19. Read all registers using the Auto-Increment feature
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PCA9633
4-bit I2C-bus LED driver
slave address(1) sequence (A) S 1 1 0 0 0 A1 A0 0 R/W acknowledge from slave A X X
control register X 0 1 1 0 0 A
new LED All Call I2C address(2) 1 0 1 0 1 0 1 X A P
START condition
ALLCALLADR register selection acknowledge from slave Auto-Increment on
acknowledge from slave STOP condition
the 16 LEDs are on at the acknowledge(3) LED All Call I2C address sequence (B) S 1 0 1 0 1 0 1 0 R/W acknowledge from the 4 devices A X X control register X 0 1 0 0 0 A LEDOUT register (LED fully ON) 0 1 0 1 0 1 0 1 A P
START condition
LEDOUT register selection acknowledge from the 4 devices
acknowledge from the 4 devices STOP condition
002aab424
(1) 10-pin version is used for this figure. Four PCA9633DP2 are used and the same sequence (A) (above) is sent to each of them. A[1:0] = 00 to 11. (2) ALLCALL bit in MODE1 register is equal to 1 for this example. (3) OCH bit in MODE2 register is equal to 1 for this example.
Fig 20. LED All Call I2C-bus address programming and LED All Call sequence example
SWRST Call I2C address S 0 0 0 0 0 1 1 0 R/W acknowledge from slave(s) A 1 0
SWRST data Byte 1 = 0xA5 1 0 0 1 0 1 A 0 1
SWRST data Byte 2 = 0x5A 0 1 1 0 1 0 A P
START condition
acknowledge from slave(s)
acknowledge from slave(s)
PCA9633 is(are) reset. Registers are set to default power-up values.
002aab425
Fig 21. Software Reset (SWRST) Call sequence
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PCA9633
4-bit I2C-bus LED driver
10. Application design-in information
5V VDD = 2.5 V/3.3 V/5.0 V 12 V
I2C-BUS/SMBus MASTER SDA SCL
10 k
10 k
10 k(1)
VDD SDA SCL LED0 LED1 LED2 LED3
OE
OE
PCA9633
A0 A1 A2 A3 A4 A5 A6 VSS
002aab286
(1) OE requires pull-up resistor if control signal from the master is open-drain. I2C-bus address = 0010101
Fig 22. Typical application
11. Limiting values
Table 19: Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol VDD VI/O IO(LEDn) ISS Ptot Tstg Tamb Parameter supply voltage voltage on an input/output pin output current on pin LEDn ground supply current total power dissipation storage temperature ambient temperature operating Conditions Min -0.5 VSS - 0.5 -65 -40 Max +6.0 5.5 25 100 400 +150 +85 Unit V V mA mA mW C C
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PCA9633
4-bit I2C-bus LED driver
12. Static characteristics
Table 20: Static characteristics VDD = 2.3 V to 5.5 V; VSS = 0 V; Tamb = -40 C to +85 C; unless otherwise specified. Symbol Supply VDD IDD supply voltage supply current Operating mode; VDD = 2.3 V; no load; fSCL = 1 MHz Operating mode; VDD = 3.3 V; no load; fSCL = 1 MHz Operating mode; VDD = 5.5 V; no load; fSCL = 1 MHz Istb standby current VDD = 2.3 V; no load; fSCL = 0 Hz; I/O = inputs; VI = VDD VDD = 3.3 V; no load; fSCL = 0 Hz; I/O = inputs; VI = VDD VDD = 5.5 V; no load; fSCL = 0 Hz; I/O = inputs; VI = VDD VPOR VIL VIH IOL IL Ci IOL power-on reset voltage LOW-level input voltage HIGH-level input voltage LOW-level output current leakage current input capacitance LOW-level output current VOL = 0.4 V; VDD = 2.3 V VOL = 0.4 V; VDD = 5.0 V VI = VDD or VSS VI = VSS VOL = 0.5 V; VDD = 2.3 V VOL = 0.5 V; VDD = 3.0 V VOL = 0.5 V; VDD = 4.5 V IOL(tot) IOH VOH total LOW-level output current HIGH-level output current HIGH-level output voltage VOL = 0.5 V; VDD = 4.5 V open-drain; VOH = VDD IOH = -10 mA; VDD = 2.3 V IOH = -10 mA; VDD = 3.0 V IOH = -10 mA; VDD = 4.5 V Co OE input VIL VIH ILI Ci LOW-level input voltage HIGH-level input voltage input leakage current input capacitance -0.5 2 -1 3.7 +0.8 5.5 +1 5 V V A pF output capacitance no load; VI = VDD or VSS
[1]
Parameter
Conditions
Min 2.3 -0.5 0.7VDD 20 30 -1 12 17 25 -50 1.6 2.3 4.0 -
Typ 2.5 2.5 2.5 2.3 2.9 3.8 1.70 6 2.5
Max 5.5 10 10 10 11 12 15.5 2.0
Unit V mA mA mA A A A V
Input SCL; input/output SDA +0.3VDD V 5.5 +1 10 100 +50 5 V mA mA A pF mA mA mA mA A V V V pF
LED driver outputs
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PCA9633
4-bit I2C-bus LED driver
Table 20: Static characteristics ...continued VDD = 2.3 V to 5.5 V; VSS = 0 V; Tamb = -40 C to +85 C; unless otherwise specified. Symbol VIL VIH ILI Ci
[1]
Parameter LOW-level input voltage HIGH-level input voltage input leakage current input capacitance
Conditions
Min -0.5 0.7VDD -1 -
Typ 3.7
Max
Unit
Address inputs +0.3VDD V 5.5 +1 5 V A pF
VDD must be lowered to 0.2 V in order to reset part.
13. Dynamic characteristics
Table 21: Dynamic characteristics Conditions Standard mode I2C-bus Min fSCL tBUF tHD;STA tSU;STA tSU;STO tHD;DAT tVD;ACK tVD;DAT tSU;DAT tLOW tHIGH tf tr tSP SCL clock frequency bus free time between a STOP and START condition hold time (repeated) START condition set-up time for a repeated START condition set-up time for STOP condition data hold time data valid acknowledge time data valid time data set-up time LOW period of the SCL clock HIGH period of the SCL clock fall time of both SDA and SCL signals rise time of both SDA and SCL signals pulse width of spikes that must be suppressed by the input filter
[7] [5] [6] [2] [3] [1]
Symbol Parameter
Fast mode I2C-bus Min 0 1.3 0.6 0.6 0.6 0 0.1 0.1 100 1.3 0.6 20 + 0.1 Cb
[4]
Fast+ mode I2C-bus Max 400 0.9 0.9 300 300 50 Min 0 0.5 0.26 0.26 0.26 0 0.05 0.05 50 0.5 0.26 Max
Unit
Max 100 3.45 3.45 300 1000 50
0 4.7 4.0 4.7 4.0 0 0.3 0.3 250 4.7 4.0 -
1000 kHz 0.45 0.45 120 120 50 s s s s ns s s ns s s ns ns ns
20 + 0.1 Cb [4] -
[1] [2] [3] [4] [5]
Minimum SCL clock frequency is limited by the bus time-out feature, which resets the serial bus interface if either SDA or SCL is held LOW for a minimum of 25 ms. Disable bus time-out feature for DC operation. tVD;ACK = time for Acknowledgement signal from SCL LOW to SDA (out) LOW. tVD;DAT = minimum time for SDA data out to be valid following SCL LOW. Cb = total capacitance of one bus line in pF. A master device must internally provide a hold time of at least 300 ns for the SDA signal (refer to the VIL of the SCL signal) in order to bridge the undefined region of SCL's falling edge.
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PCA9633
4-bit I2C-bus LED driver
[6]
The maximum tf for the SDA and SCL bus lines is specified at 300 ns. The maximum fall time (tf) for the SDA output stage is specified at 250 ns. This allows series protection resistors to be connected between the SDA and the SCL pins and the SDA/SCL bus lines without exceeding the maximum specified tf. Input filters on the SDA and SCL inputs suppress noise spikes less than 50 ns.
[7]
SDA tBUF tLOW SCL tr tf tHD;STA tSP
tHD;STA P S tHD;DAT tHIGH tSU;DAT Sr
tSU;STA
tSU;STO P
002aaa986
Fig 23. Definition of timing
protocol
START condition (S) tSU;STA
bit 7 MSB (A7) tLOW tHIGH
bit 6 (A6)
bit 7 (D1)
bit 8 (D0)
acknowledge (A)
STOP condition (P)
1/f
SCL
SCL tBUF tr tf
SDA
tHD;STA
tSU;DAT
tHD;DAT
tVD;DAT
tVD;ACK
tSU;STO
002aab285
Rise and fall times refer to VIL and VIH.
Fig 24. I2C-bus timing diagram
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PCA9633
4-bit I2C-bus LED driver
14. Test information
VDD open GND
VDD PULSE GENERATOR VI D.U.T.
RT
VO
RL 500
CL 50 pF
002aab284
RL = Load resistor for LEDn. RL for SDA and SCL > 1 k (3 mA or less current). CL = Load capacitance includes jig and probe capacitance. RT = Termination resistance should be equal to the output impedance Zo of the pulse generators.
Fig 25. Test circuitry for switching times
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PCA9633
4-bit I2C-bus LED driver
15. Package outline
TSSOP8: plastic thin shrink small outline package; 8 leads; body width 3 mm SOT505-1
D
E
A
X
c y HE vMA
Z
8
5
A2 pin 1 index
A1
(A3)
A
Lp L
1
e bp
4
detail X wM
0
2.5 scale
5 mm
DIMENSIONS (mm are the original dimensions) UNIT mm A max. 1.1 A1 0.15 0.05 A2 0.95 0.80 A3 0.25 bp 0.45 0.25 c 0.28 0.15 D(1) 3.1 2.9 E(2) 3.1 2.9 e 0.65 HE 5.1 4.7 L 0.94 Lp 0.7 0.4 v 0.1 w 0.1 y 0.1 Z(1) 0.70 0.35 6 0
Notes 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT505-1 REFERENCES IEC JEDEC JEITA EUROPEAN PROJECTION ISSUE DATE 99-04-09 03-02-18
Fig 26. Package outline SOT505-1 (TSSOP8)
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Product data sheet
Rev. 01 -- 23 January 2006
31 of 41
Philips Semiconductors
PCA9633
4-bit I2C-bus LED driver
TSSOP10: plastic thin shrink small outline package; 10 leads; body width 3 mm
SOT552-1
D
E
A
X
c y HE vMA
Z
10
6
A2 pin 1 index
A1
(A3)
A
Lp L
1
e bp
5
detail X wM
0
2.5 scale
5 mm
DIMENSIONS (mm are the original dimensions) UNIT mm A max. 1.1 A1 0.15 0.05 A2 0.95 0.80 A3 0.25 bp 0.30 0.15 c 0.23 0.15 D (1) 3.1 2.9 E (2) 3.1 2.9 e 0.5 HE 5.0 4.8 L 0.95 Lp 0.7 0.4 v 0.1 w 0.1 y 0.1 Z (1) 0.67 0.34 6 0
Notes 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. Plastic or metal protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT552-1 REFERENCES IEC JEDEC JEITA EUROPEAN PROJECTION ISSUE DATE 99-07-29 03-02-18
Fig 27. Package outline SOT552-1 (TSSOP10)
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Product data sheet
Rev. 01 -- 23 January 2006
32 of 41
Philips Semiconductors
PCA9633
4-bit I2C-bus LED driver
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
D
E
A X
c y HE vMA
Z 16 9
Q A2 pin 1 index Lp 1 e bp 8 wM L detail X A1 (A 3) A
0
2.5 scale
5 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches Note 1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. OUTLINE VERSION SOT109-1 REFERENCES IEC 076E07 JEDEC MS-012 JEITA EUROPEAN PROJECTION A max. 1.75 A1 0.25 0.10 A2 1.45 1.25 A3 0.25 0.01 bp 0.49 0.36 c 0.25 0.19 D (1) 10.0 9.8 E (1) 4.0 3.8 0.16 0.15 e 1.27 0.05 HE 6.2 5.8 L 1.05 Lp 1.0 0.4 0.039 0.016 Q 0.7 0.6 0.028 0.020 v 0.25 0.01 w 0.25 0.01 y 0.1 Z (1) 0.7 0.3
0.010 0.057 0.069 0.004 0.049
0.019 0.0100 0.39 0.014 0.0075 0.38
0.244 0.041 0.228
0.028 0.004 0.012
8 o 0
o
ISSUE DATE 99-12-27 03-02-19
Fig 28. Package outline SOT109-1 (SO16)
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Product data sheet
Rev. 01 -- 23 January 2006
33 of 41
Philips Semiconductors
PCA9633
4-bit I2C-bus LED driver
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm
SOT403-1
D
E
A
X
c y HE vMA
Z
16
9
Q A2 pin 1 index A1 Lp L (A 3) A
1
e bp
8
wM detail X
0
2.5 scale
5 mm
DIMENSIONS (mm are the original dimensions) UNIT mm A max. 1.1 A1 0.15 0.05 A2 0.95 0.80 A3 0.25 bp 0.30 0.19 c 0.2 0.1 D (1) 5.1 4.9 E (2) 4.5 4.3 e 0.65 HE 6.6 6.2 L 1 Lp 0.75 0.50 Q 0.4 0.3 v 0.2 w 0.13 y 0.1 Z (1) 0.40 0.06 8 o 0
o
Notes 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. Plastic interlead protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT403-1 REFERENCES IEC JEDEC MO-153 JEITA EUROPEAN PROJECTION ISSUE DATE 99-12-27 03-02-18
Fig 29. Package outline SOT403-1 (TSSOP16)
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Product data sheet
Rev. 01 -- 23 January 2006
34 of 41
Philips Semiconductors
PCA9633
4-bit I2C-bus LED driver
HVQFN16: plastic thermal enhanced very thin quad flat package; no leads; 16 terminals; body 4 x 4 x 0.85 mm
SOT629-1
D
B
A
terminal 1 index area E
AA 1 c
detail X
e1
1/2 e
C b 8 vMCAB wMC y1 C y
e 5 L
4
9 e
Eh
1/2 e
e2
1 12
terminal 1 index area
16 Dh 0
13 X 2.5 scale 5 mm
DIMENSIONS (mm are the original dimensions) UNIT mm A(1) max. 1 A1 0.05 0.00 b 0.38 0.23 c 0.2 D (1) 4.1 3.9 Dh 2.25 1.95 E (1) 4.1 3.9 Eh 2.25 1.95 e 0.65 e1 1.95 e2 1.95 L 0.75 0.50 v 0.1 w 0.05 y 0.05 y1 0.1
Note 1. Plastic or metal protrusions of 0.075 mm maximum per side are not included. OUTLINE VERSION SOT629-1 REFERENCES IEC --JEDEC MO-220 JEITA --EUROPEAN PROJECTION ISSUE DATE 01-08-08 02-10-22
Fig 30. Package outline SOT629-1 (HVQFN16)
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Product data sheet
Rev. 01 -- 23 January 2006
35 of 41
Philips Semiconductors
PCA9633
4-bit I2C-bus LED driver
HVSON8: plastic thermal enhanced very thin small outline package; no leads; 8 terminals; body 3 x 3 x 0.85 mm
SOT908-1
0
1 scale
2 mm
X
D
B
A
E
A A1 c detail X
terminal 1 index area terminal 1 index area
1
e1 e b
4
v w
M M
CAB C
C y1 C y exposed tie bar (4x)
L
Eh
exposed tie bar (4x)
8
5
Dh
DIMENSIONS (mm are the original dimensions) UNIT mm A(1) max. 1 A1 0.05 0.00 b 0.3 0.2 c 0.2 D(1) 3.1 2.9 Dh 2.25 1.95 E(1) 3.1 2.9 Eh 1.65 1.35 e 0.5 e1 1.5 L 0.5 0.3 v 0.1 w 0.05 y 0.05 y1 0.1
Note 1. Plastic or metal protrusions of 0.075 mm maximum per side are not included. OUTLINE VERSION SOT908-1 REFERENCES IEC JEDEC MO-229 JEITA EUROPEAN PROJECTION ISSUE DATE 05-09-26 05-10-05
Fig 31. Package outline SOT908-1 (HVSON8)
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Product data sheet
Rev. 01 -- 23 January 2006
36 of 41
Philips Semiconductors
PCA9633
4-bit I2C-bus LED driver
16. Handling information
Inputs and outputs are protected against electrostatic discharge in normal handling. However, to be completely safe you must take normal precautions appropriate to handling integrated circuits.
17. Soldering
17.1 Introduction to soldering surface mount packages
This text gives a very brief insight to a complex technology. A more in-depth account of soldering ICs can be found in our Data Handbook IC26; Integrated Circuit Packages (document order number 9398 652 90011). There is no soldering method that is ideal for all surface mount IC packages. Wave soldering can still be used for certain surface mount ICs, but it is not suitable for fine pitch SMDs. In these situations reflow soldering is recommended.
17.2 Reflow soldering
Reflow soldering requires solder paste (a suspension of fine solder particles, flux and binding agent) to be applied to the printed-circuit board by screen printing, stencilling or pressure-syringe dispensing before package placement. Driven by legislation and environmental forces the worldwide use of lead-free solder pastes is increasing. Several methods exist for reflowing; for example, convection or convection/infrared heating in a conveyor type oven. Throughput times (preheating, soldering and cooling) vary between 100 seconds and 200 seconds depending on heating method. Typical reflow peak temperatures range from 215 C to 270 C depending on solder paste material. The top-surface temperature of the packages should preferably be kept:
* below 225 C (SnPb process) or below 245 C (Pb-free process)
- for all BGA, HTSSON..T and SSOP..T packages - for packages with a thickness 2.5 mm - for packages with a thickness < 2.5 mm and a volume 350 mm3 so called thick/large packages.
* below 240 C (SnPb process) or below 260 C (Pb-free process) for packages with a
thickness < 2.5 mm and a volume < 350 mm3 so called small/thin packages. Moisture sensitivity precautions, as indicated on packing, must be respected at all times.
17.3 Wave soldering
Conventional single wave soldering is not recommended for surface mount devices (SMDs) or printed-circuit boards with a high component density, as solder bridging and non-wetting can present major problems. To overcome these problems the double-wave soldering method was specifically developed. If wave soldering is used the following conditions must be observed for optimal results:
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Product data sheet
Rev. 01 -- 23 January 2006
37 of 41
Philips Semiconductors
PCA9633
4-bit I2C-bus LED driver
* Use a double-wave soldering method comprising a turbulent wave with high upward
pressure followed by a smooth laminar wave.
* For packages with leads on two sides and a pitch (e):
- larger than or equal to 1.27 mm, the footprint longitudinal axis is preferred to be parallel to the transport direction of the printed-circuit board; - smaller than 1.27 mm, the footprint longitudinal axis must be parallel to the transport direction of the printed-circuit board. The footprint must incorporate solder thieves at the downstream end.
* For packages with leads on four sides, the footprint must be placed at a 45 angle to
the transport direction of the printed-circuit board. The footprint must incorporate solder thieves downstream and at the side corners. During placement and before soldering, the package must be fixed with a droplet of adhesive. The adhesive can be applied by screen printing, pin transfer or syringe dispensing. The package can be soldered after the adhesive is cured. Typical dwell time of the leads in the wave ranges from 3 seconds to 4 seconds at 250 C or 265 C, depending on solder material applied, SnPb or Pb-free respectively. A mildly-activated flux will eliminate the need for removal of corrosive residues in most applications.
17.4 Manual soldering
Fix the component by first soldering two diagonally-opposite end leads. Use a low voltage (24 V or less) soldering iron applied to the flat part of the lead. Contact time must be limited to 10 seconds at up to 300 C. When using a dedicated tool, all other leads can be soldered in one operation within 2 seconds to 5 seconds between 270 C and 320 C.
17.5 Package related soldering information
Table 22: Package [1] BGA, LBGA, LFBGA, SQFP, SSOP..T [3], TFBGA, VFBGA, XSON DHVQFN, HBCC, HBGA, HLQFP, HSO, HSOP, HSQFP, HSSON, HTQFP, HTSSOP, HVQFN, HVSON, SMS PLCC [5], SO, SOJ LQFP, QFP, TQFP SSOP, TSSOP, VSO, VSSOP CWQCCN..L [8],
[1]
Suitability of surface mount IC packages for wave and reflow soldering methods Soldering method Wave Reflow [2] suitable suitable not suitable not suitable [4]
HTSSON..T [3],
suitable not WQCCN..L [8] recommended [5] [6] not recommended [7] not suitable
suitable suitable suitable not suitable
PMFP [9],
For more detailed information on the BGA packages refer to the (LF)BGA Application Note (AN01026); order a copy from your Philips Semiconductors sales office.
9397 750 14614
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Product data sheet
Rev. 01 -- 23 January 2006
38 of 41
Philips Semiconductors
PCA9633
4-bit I2C-bus LED driver
[2]
All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the maximum temperature (with respect to time) and body size of the package, there is a risk that internal or external package cracks may occur due to vaporization of the moisture in them (the so called popcorn effect). For details, refer to the Drypack information in the Data Handbook IC26; Integrated Circuit Packages; Section: Packing Methods. These transparent plastic packages are extremely sensitive to reflow soldering conditions and must on no account be processed through more than one soldering cycle or subjected to infrared reflow soldering with peak temperature exceeding 217 C 10 C measured in the atmosphere of the reflow oven. The package body peak temperature must be kept as low as possible. These packages are not suitable for wave soldering. On versions with the heatsink on the bottom side, the solder cannot penetrate between the printed-circuit board and the heatsink. On versions with the heatsink on the top side, the solder might be deposited on the heatsink surface. If wave soldering is considered, then the package must be placed at a 45 angle to the solder wave direction. The package footprint must incorporate solder thieves downstream and at the side corners. Wave soldering is suitable for LQFP, QFP and TQFP packages with a pitch (e) larger than 0.8 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm. Wave soldering is suitable for SSOP, TSSOP, VSO and VSSOP packages with a pitch (e) equal to or larger than 0.65 mm; it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm. Image sensor packages in principle should not be soldered. They are mounted in sockets or delivered pre-mounted on flex foil. However, the image sensor package can be mounted by the client on a flex foil by using a hot bar soldering process. The appropriate soldering profile can be provided on request. Hot bar soldering or manual soldering is suitable for PMFP packages.
[3]
[4]
[5] [6] [7] [8]
[9]
18. Abbreviations
Table 23: Acronym CDM ESD HBM I2C-bus LED LSB MM PCB PWM RGB RGBA SMBus Abbreviations Description Charged Device Model ElectroStatic Discharge Human Body Model Inter IC bus Light Emitting Diode Least Significant Bit Machine Model Printed-Circuit Board Pulse Width Modulation Red/Green/Blue Red/Green/Blue/Amber System Management Bus
19. Revision history
Table 24: Revision history Release date 20060123 Data sheet status Product data sheet Change notice Doc. number 9397 750 14614 Supersedes Document ID PCA9633_1
9397 750 14614
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Product data sheet
Rev. 01 -- 23 January 2006
39 of 41
Philips Semiconductors
PCA9633
4-bit I2C-bus LED driver
20. Data sheet status
Level I II Data sheet status [1] Objective data Preliminary data Product status [2] [3] Development Qualification Definition This data sheet contains data from the objective specification for product development. Philips Semiconductors reserves the right to change the specification in any manner without notice. This data sheet contains data from the preliminary specification. Supplementary data will be published at a later date. Philips Semiconductors reserves the right to change the specification without notice, in order to improve the design and supply the best possible product. This data sheet contains data from the product specification. Philips Semiconductors reserves the right to make changes at any time in order to improve the design, manufacturing and supply. Relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN).
III
Product data
Production
[1] [2] [3]
Please consult the most recently issued data sheet before initiating or completing a design. The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at URL http://www.semiconductors.philips.com. For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
21. Definitions
Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 60134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification.
customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves the right to make changes in the products - including circuits, standard cells, and/or software - described or contained herein in order to improve design and/or performance. When the product is in full production (status `Production'), relevant changes will be communicated via a Customer Product/Process Change Notification (CPCN). Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified.
23. Trademarks
Notice -- All referenced brands, product names, service names and trademarks are the property of their respective owners. I2C-bus -- logo is a trademark of Koninklijke Philips Electronics N.V.
22. Disclaimers
Life support -- These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors
24. Contact information
For additional information, please visit: http://www.semiconductors.philips.com For sales office addresses, send an email to: sales.addresses@www.semiconductors.philips.com
9397 750 14614
(c) Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Product data sheet
Rev. 01 -- 23 January 2006
40 of 41
Philips Semiconductors
PCA9633
4-bit I2C-bus LED driver
25. Contents
1 2 3 4 5 6 6.1 6.2 7 7.1 7.1.1 7.1.2 7.1.3 7.1.4 7.2 7.3 7.3.1 7.3.2 7.3.3 7.3.4 7.3.5 7.3.6 7.3.7 7.3.8 7.4 7.5 7.6 7.7 7.8 8 8.1 8.1.1 8.2 8.3 9 10 11 12 13 14 15 16 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Ordering information . . . . . . . . . . . . . . . . . . . . . 3 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Pinning information . . . . . . . . . . . . . . . . . . . . . . 5 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 6 Functional description . . . . . . . . . . . . . . . . . . . 8 Device addresses . . . . . . . . . . . . . . . . . . . . . . . 8 Regular I2C-bus slave address . . . . . . . . . . . . . 8 LED All Call I2C-bus address . . . . . . . . . . . . . . 8 LED Sub Call I2C-bus addresses . . . . . . . . . . . 9 Software Reset I2C-bus address . . . . . . . . . . . 9 Control register . . . . . . . . . . . . . . . . . . . . . . . . 10 Register definitions . . . . . . . . . . . . . . . . . . . . . 12 Mode register 1, MODE1 . . . . . . . . . . . . . . . . 12 Mode register 2, MODE2 . . . . . . . . . . . . . . . . 13 PWM registers 0 to 3, PWMx--Individual brightness control registers . . . . . . . . . . . . . . 13 Group duty cycle control, GRPPWM . . . . . . . 14 Group frequency, GRPFREQ . . . . . . . . . . . . . 14 LED driver output state, LEDOUT . . . . . . . . . 14 I2C-bus sub-address 1 to 3, SUBADRx . . . . . 15 LED All Call I2C-bus address, ALLCALLADR. 15 Active LOW output enable input . . . . . . . . . . . 16 Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . 16 Software Reset . . . . . . . . . . . . . . . . . . . . . . . . 17 Using the PCA9633 with and without external drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Individual brightness control with group dimming/blinking . . . . . . . . . . . . . . . . . . . . . . . 20 Characteristics of the I2C-bus. . . . . . . . . . . . . 21 Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 START and STOP conditions . . . . . . . . . . . . . 21 System configuration . . . . . . . . . . . . . . . . . . . 21 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 22 Bus transactions . . . . . . . . . . . . . . . . . . . . . . . 23 Application design-in information . . . . . . . . . 26 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 26 Static characteristics. . . . . . . . . . . . . . . . . . . . 27 Dynamic characteristics . . . . . . . . . . . . . . . . . 28 Test information . . . . . . . . . . . . . . . . . . . . . . . . 30 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 31 Handling information. . . . . . . . . . . . . . . . . . . . 37 17 17.1 17.2 17.3 17.4 17.5 18 19 20 21 22 23 24 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction to soldering surface mount packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . Manual soldering . . . . . . . . . . . . . . . . . . . . . . Package related soldering information . . . . . . Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . Revision history . . . . . . . . . . . . . . . . . . . . . . . Data sheet status. . . . . . . . . . . . . . . . . . . . . . . Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . Contact information . . . . . . . . . . . . . . . . . . . . 37 37 37 37 38 38 39 39 40 40 40 40 40
(c) Koninklijke Philips Electronics N.V. 2006
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Date of release: 23 January 2006 Document number: 9397 750 14614
Published in The Netherlands

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