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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
August 2010
FAN5702 Configurable 180mA 6-LED Driver with I2C Control
Features
Six (6) Parallel LEDs (up to 30mA Each) Total Package Load Current Capability: 180mA Group from 2 to 6 LEDs for Flexible Backlighting I C Interface for Easy Programming >600:1 Dimming Ratio for 100Hz PWM Frequency Logarithmically Controlled Dimming with 64 Steps Secondary Brightness Control Using PWM Dimming 2 up to 20kHz in Conjunction with I C Dimming - Dynamic Backlight Control (DBC) to Reduce Current Consumption Up to 92% Efficiency Built-in 1.5x Charge Pump with Low Drop-Out Bypass Switch and automatic switching to 1x mode 1.2MHz Switching Frequency for Small-Sized Capacitors 16-Bump 1.6mm x 1.6mm WLCSP (0.6mm Height) 16-Lead 3.0mm x 3.0mm UMLP (0.55mm Height)
2
Description
The FAN5702 is a highly integrated and configurable chargepump-based multi-LED driver. The device can drive up to six LEDs in parallel with a total output current of 180mA. Regulated internal current sinks deliver excellent current and brightness matching to all LEDs. The FAN5702 has an I C interface that allows the user to independently control the brightness with a default grouping of 2,1,1,1,1 for a maximum of five independent lighting channels. The LED driver can be programmed in a multitude of configurations to address broad lighting requirements for 2 different platforms. Each LED can be configured through I C as five independent channels (Group A has two LEDs by default) or any additional LEDs can join Group A to increase the backlighting needs as the display size increases. The device offers a second dimming control using the EN/PWM pin. Applying a PWM dimming signal to this pin allows control of the dimming of Group A LEDs so that the average current is the linear value multiplied by the PWM dimming duty-cycle. The device provides excellent efficiency, without an inductor, by operating the charge pump in 1.5x or pass-through mode. The FAN5702 can be ordered with default ISET values of 30mA, 20mA, 15mA, or 8mA. The default ISET is always determined by the ISET ordered (see Ordering Information).
2
Applications
LCD Backlighting Mobile Handsets / Smartphones Portable Media Players
Ordering Information
Part Number
FAN5702UC30X FAN5702UC20X FAN5702UC15X FAN5702UC08X FAN5702UMP30X FAN5702UMP20X FAN5702UMP15X FAN5702UMP08X
LED Current (ISET)
30mA 20mA 15mA 8mA 30mA 20mA 15mA 8mA
Temperature Range
-40 to 85C -40 to 85C -40 to 85C -40 to 85C -40 to 85C -40 to 85C -40 to 85C -40 to 85C
Package
WLCSP-16, 0.4mm Pitch WLCSP-16, 0.4mm Pitch WLCSP-16, 0.4mm Pitch WLCSP-16, 0.4mm Pitch UMLP-16, 3.0 x 3.0 x 0.55mm UMLP-16, 3.0 x 3.0 x 0.55mm UMLP-16, 3.0 x 3.0 x 0.55mm UMLP-16, 3.0 x 3.0 x 0.55mm
Packing
Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel Tape and Reel
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
Typical Application
Figure 1. Typical Application
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
WLCSP Pin Configuration
A1
A2
A3
A4
A4
A3
A2
A1
B1
B2
B3
B4
B4
B3
B2
B1
C1
C2
C3
C4
C4
C3
C2
C1
D1
D2
D3
D4
D4
D3
D2
D1
Bumps Facing Down
Bumps Facing Up
Figure 2. WLCSP-16, 0.4mm Pitch, 1.61 x 1.61mm
Pin Definitions
Pin #
D2 B4 D1 D3 ,D4 C3, C4 A1,A2 B1,B2 C1,C2
Name
VIN GND VOUT C1+, C1- C2+, C2- D2A, D1A D4,D3 D6,D5 Ground
Description
Input Supply Voltage. Connect to 2.7 - 5.5VDC input power source. Charge Pump Output Voltage. Connect to LED anodes. Charge pump flying capacitor #1 Charge pump flying capacitor #2 LED Outputs Enable / PWM dimming input. By default, this pin acts as a simple enable / disable function. When this pin is HIGH, normal operation is enabled. When LOW, the IC is reset and all functions 2 (including I C communications) are disabled. By setting General Purpose register bit 7 = 1, the pin functions as a PWM dimming input for Group A. To restore the Enable function, the General Purpose register bit 7 must be set LOW. I C interface serial data I C interface serial clock
2 2
A4
EN / PWM
B3 A3
SDA SCL
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
UMLP Pin Configuration
Bottom View Figure 3. UMLP-16, 0.5mm Pitch, 3mm x 3mm
Pin Definitions
Pin #
11 6 12 10,9 8,7 1, 2 15, 16 13, 14
Name
VIN GND VOUT C1+, C1- C2+, C2- D2A, D1A D4,D3 D6,D5 Ground
Description
Input Supply Voltage. Connect to 2.7 - 5.5VDC input power source. Charge Pump Output Voltage. Connect to LED anodes. Charge pump flying capacitor #1 Charge pump flying capacitor #2 LED Outputs Enable / PWM dimming input. By default, this pin acts as a simple enable / disable function. When this pin is HIGH, normal operation is enabled. When LOW, the IC is reset and all functions 2 (including I C communications) are disabled. By setting General Purpose register bit 7 = 1, the pin functions as a PWM dimming input for Group A. To restore the Enable function, the General Purpose register bit 7 must be set LOW. I C interface serial data I C interface serial clock
2 2
4
EN / PWM
5 3
SDA SCL
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only.
Symbol
VCC ESD TJ TSTG TL VIN, VOUT Pins Other Pins
(1)
Parameter
Min.
-0.3 -0.3
Max.
6.0 VIN + 0.3 3 2
Units
V V kV
Electrostatic Discharge Protection Level Junction Temperature Storage Temperature
Human Body Model per JESD22-A114 Charged Device Model per JESD22-C101 -40 -65
+150 +150 +260
C C C
Lead Soldering Temperature, 10 Seconds
Note: 1. Lesser of VIN + 0.3 or 6.0V.
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to absolute maximum ratings.
Symbol
VIN VLED TA TJ Supply Voltage LED Forward Voltage Ambient Temperature Junction Temperature
Parameter
Min.
2.7 2 -40 -40
Max.
5.5 4 +85 +125
Units
V V C C
Thermal Properties
Symbol
JA
Parameter
Junction-to-Ambient Thermal Resistance WLCSP UMLP
Min.
Typ.
80 49
Max.
Units
C/W
Note: 2. Junction-to-ambient thermal resistance is a function of application and board layout. This data is measured with four-layer 2s2p boards in accordance to JESD51-7 JEDEC standard. Special attention must be paid not to exceed junction temperature TJ(max) at a given ambient temperate TA.
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
Electrical Specifications
Unless otherwise specified: VIN = 2.7V to 5.5V; TA = -40C to +85C; and ENA, EN3, EN4, EN5, and EN6 = 1. Typical values are VIN = 3.6V, TA = 25C, ILED = 20mA, and LED cathode terminals = 0.4V. Circuit and components are according to Figure 1.
Symbol
Parameter
Conditions
1.5x Mode, No LEDs 1x Mode, No LEDs EN = 0, VIN = 4.5V, TA = -40C to +85C VIN Rising VIN Falling
Min.
Typ.
4.4 0.3 0.1 2.55
Max.
Units
mA mA
Power Supplies and Thermal Protection IQ ISD VUVLO VUVHYST TLIMIT THYST ILED ILED(MAX) ILED_MATCH VDTH VHR fPWM DPWM Quiescent Supply Current Shutdown Supply Current Under-Voltage Lockout Threshold Under-Voltage Lockout Hysteresis Thermal Shutdown Thermal Shutdown Hysteresis Absolute Current Accuracy Maximum Diode Current LED Current Matching
(4) (3)
2.0 2.70
A V V mV C C
2.20
2.40 150 150 20
LED Current Sinks VCATHODE=0.4V; see options for ISET ILED = ISET VCATHODE = 0.4V, ILED = ISET LED Cathode Voltage Falling ILED = 90% ILED(NOMINAL) tON_LED(MINIMUM) = 15s fPWM = 100Hz 1.5x Mode 1x Mode 0.9 VOUT = 90% of VIN 1.2 0.4 1.8 Input Tied to GND or VIN 0.01 5.5 1.00 0.15 2.4 0.9 1.2 250 1.5 -10% ISET 30 0.4 100 65 20 100.00 3.0 +10% mA mA % mV mV kHz % MHz s V V V A
1x to 1.5x Gain Transition Threshold Current Sink Headroom
(5)
PWM Dimming PWM Switching Frequency PWM Duty-Cycle
Charge Pump ROUT fSW tSTART VIH VIL VIMAX IIN Output Resistance Switching Frequency Startup Time HIGH-Level Input Voltage LOW-Level Input Voltage Maximum Input Voltage Input Bias Current
Logic Inputs (EN, SDA, SCL)
Notes: 3. The maximum total output current for the IC should be limited to 180mA. The total output current can be split between the two groups (IDxA = IDxB = 30mA maximum). Under maximum output current conditions, special attention must be given to input voltage and LED forward voltage to ensure proper current regulation. See the Maximum Output Current section of the datasheet for more information. 4. For the two groups of current sinks on a part (group A and group B), the following are determined: the maximum sink current in the group (MAX), the minimum sink current in the group (MIN), and the average sink current of the group (AVG). For each group, two matching numbers are calculated: (MAX-AVG)/AVG and (AVG-MIN)/AVG. The largest number of the two (worst case) is considered the matching value for the group. The matching value for a given part is considered to be the highest matching value of the two groups. The typical specification provided is the most likely norm of the matching value for all parts. 5. For each Dxx pin, headroom voltage is the voltage across the internal current sink connected to that pin. VHRx = VOUT VLED. If headroom voltage requirement is not met, LED current regulation is compromised.
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
Typical Characteristics
VIN = 3.6V, TA = 25C, ILED = 20mA, and LED cathode terminals = 0.4V.
Figure 4. Efficiency with LED Current of 8mA and 20mA
Figure 5. LED Current Match for all 6 LED Channels at ILED=20mA.
Figure 6. LED Current Variation vs. Temperature
Figure 7. Shutdown Current vs. Input Voltage
Figure 8. Switching Frequency over Temperature with LED Current at 20mA
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
Typical Characteristics
VIN = 3.6V, TA = 25C, ILED = 20mA, and LED cathode terminals = 0.4V.
Figure 9. Mode Transition from 1x to 1.5x Mode Using PWM Control (VCATHODE Ramp Up) at 2% Duty Cycle
Figure 10. Mode Transition from 1.5x to 1x Mode Using PWM Control (VCATHODE Ramp Down) at 2% Duty Cycle
Figure 11. Line Transient Response in 1x Mode, VIN=3.6V - 4.2V, ILEDx=20mA
Figure 12. Line Transient Response in 1.5x Mode, VIN=2.7V - 3.3V, ILED=20mA
Figure 13. Line Transient from 1x to 1.5x Mode, VIN=3.2V - 4.1V, ILEDx=20mA
Figure 14. Soft-Start with SDA and SCL
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
Typical Characteristics
Figure 15. Linear Dimming via I C Interface, VIN=3.6V, ILEDx=20mA, and tRAMP=6.4ms
2
Figure 16. PWM Dimming, VIN=3.6V, ILEDx=20mA, and EN=1kHz with 20% Duty Cycle
Figure 17. PWM and Linear (via I C) Dimming, VIN=3.6V, ILEDx=20mA, and EN=1kHz with 20% Duty Cycle
2
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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
I2C Timing Specifications
Guaranteed by design.
Symbol
fSCL tBUF tHD;STA tLOW tHIGH tSU;STA tSU;DAT tHD;DAT tRCL tFCL
Parameter
SCL Clock Frequency Bus-Free Time between STOP and START Conditions START or Repeated START Hold Time SCL LOW Period SCL HIGH Period Repeated START Setup Time Data Setup Time Data Hold Time SCL Rise Time SCL Fall Time
(6)
Conditions
Standard Mode Fast Mode Standard mode Fast Mode Standard Mode Fast Mode Standard Mode Fast Mode Standard Mode Fast Mode Standard Mode Fast Mode Standard Mode Fast Mode Standard Mode Fast Mode Standard Mode Fast Mode Standard Mode Fast Mode Standard Mode Fast Mode Standard Mode Fast Mode Standard Mode Fast Mode
Min.
Typ.
Max.
100 400
Units
kHz s s ns s ns s ns s ns ns ns
4.7 1.3 4 600 4.7 1.3 4 600 4.7 600.0 250 100 0 0 20+0.1CB 20+0.1CB 20+0.1CB 20+0.1CB 20+0.1CB 20+0.1CB 20+0.1CB 20+0.1CB 4 600 400 3.45 900.00 1000 300 300 300 1000 300 300 300
s ns ns ns ns ns ns ns ns ns s ns pF
tRDA
SDA Rise Time
tFDA tSU;STO CB
SDA Fall Time Stop Condition Setup Time Capacitive Load for SDA and SCL
Note: 6. Rise time of SCL after a repeated START condition and after an ACK bit.
Timing Diagram
tF tSU;STA tBUF
SDA
tR TSU;DAT tHIGH tHD;DAT tHD;STA REPEATED START STOP START tHD;STO
SCL
tHD;STA
tLOW
START
2
Figure 18. I C Interface Timing for Fast and Slow Modes
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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
Circuit Description
The FAN5702 is a white LED driver system based on an adaptive 1.5x charge pump capable of supplying up to 180mA of total output current. The tightly matched current sinks ensure uniform brightness between the LEDs. Each LED has a common anode configuration with its peak drive current set during manufacturing (see Ordering Information and ISET). An 2 I C-compatible interface is used to vary the brightness within the individual current sinks as well as configure the grouping. Each LED is controlled with 64 exponentially spaced analog 2 brightness control levels through I C, as indicated in Table 1. For maximum flexibility, the FAN5702 can be programmed with five independently controlled LED banks; by default, arranged as 2,1,1,1,1 (first two LEDs represent Group A). 2 Through I C, the device can be reconfigured to add up to six LEDs to Group A as needed by application requirements.
Register Controlled Brightness
The DC value of the LED current is modulated according to the values in Table 1. Current is expressed as a percentage of the full scale current and is illustrated with a 20mA ISET.
Table 1. Brightness Control
Dimming Code (Bx5-Bx0)
000000 000001 000010 000011 000100 000101 000110 000111 001000 001001 001010 001011 001100 001101 001110 001111 010000 010001 010010 010011 010100 010101 010110 010111 011000 011001 011010 011011 011100 011101 011110 011111 100000 100001 100010 100011 100100 100101 100110 100111 101000 101001 101010 101011 101100 101101 101110 101111 110000 110001 110010 110011 110100 110101 110110 110111 111000 111001 111010 111011 111100 111101 111110 111111
Current Level
0.125% 0.188% 0.249% 0.312% 0.374% 0.438% 0.499% 0.560% 0.622% 0.692% 0.750% 0.810% 0.875% 0.938% 1.004% 1.124% 1.250% 1.375% 1.499% 1.625% 1.750% 1.881% 2.063% 2.249% 2.438% 2.687% 2.939% 3.186% 3.562% 3.936% 4.310% 4.813% 5.314% 5.936% 6.565% 7.313% 8.059% 8.938% 9.876% 10.874% 12.005% 13.253% 14.618% 16.124% 17.881% 19.875% 22.121% 24.621% 27.376% 30.373% 33.623% 37.124% 40.873% 44.875% 49.124% 53.624% 58.375% 63.378% 68.625% 74.122% 79.874% 85.873% 92.373% 100.000%
ILED (mA) (ISET=20mA)
0.025 0.038 0.050 0.063 0.075 0.088 0.100 0.113 0.125 0.138 0.150 0.163 0.175 0.188 0.200 0.225 0.250 0.275 0.300 0.325 0.350 0.375 0.413 0.450 0.488 0.538 0.588 0.638 0.713 0.788 0.863 0.963 1.063 1.188 1.313 1.463 1.613 1.788 1.975 2.175 2.400 2.650 2.925 3.225 3.575 3.975 4.425 4.925 5.475 6.075 6.725 7.425 8.175 8.975 9.825 10.725 11.675 12.675 13.725 14.825 15.975 17.175 18.475 20.000
Charge Pump
The charge pump operates in either 1x mode, where VOUT is connected to VIN through a bypass switch, or in 1.5x mode. The circuit operates in 1x mode until the LED with the highest forward voltage (VLED(MAX)) can no longer maintain current regulation. At that point, 1.5x mode begins. If the lowest active cathode voltage is greater than 1.8V, the charge pump switches back to 1x mode.
IC Enable
By default the General Purpose register bit 7 = 0, the EN pin functions as enable/disable. When the EN pin is LOW, all 2 circuit functions, including I C, are disabled and the registers are set to their default values. When the EN pin HIGH, I C interface is enabled. The LEDs can be turned on/off by writing to the General Purpose 2 register. The user can always communicate via I C with the device to change register settings regardless of whether any LED is on or off.
2
PWM Dimming
By programming the General Purpose register bit 7 = 1, the EN pin is reappropriated to a PWM dimming input. Applying a PWM signal to this pin controls the LED current waveform to be ON when the PWM dimming pin is HIGH and OFF when the PWM dimming pin is LOW. By using this pin in conjunction 2 with the I C register dimming, the part can achieve higher dimming resolution. For instance, an 8-bit PWM dimming signal applied along with the 6-bit register dimming yields better than 14 bits of resolution To change the PWM dimming pin back to the EN function, set the General Purpose register bit 7 to 0.
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
Brightness Ramp Control
When changing the group A brightness, the IC steps through the brightness table at rate programmed by the RAMP register, indicated in Table 2.
Register Addressing
The FAN5702 has six user-accessible registers.
Table 4. I C Register Addresses Default Value 7
GENERAL CONFIG CHA CH3 CH4 CH5 CH6 0 0 1 1 1 1 1
2
Table 2. Group A Brightness Ramp Control RAMP[1:0] Time per Step
00 01 10 11 0.1ms 25ms 50ms 100ms
Address 1
0 0 1 1 1 1 1
Full-Scale Ramp Time
6.4ms 1600ms 3200ms 6400ms
6
0 0 1 1 1 1 1
5
0 0 1 1 1 1 1
4
0 0 1 1 1 1 1
3
0 0 1 1 1 1 1
2
0 0 1 1 1 1 1
0
0 0 1 1 1 1 1
HEX
10 20 A0 30 40 50 60
VOUT Short-Circuit Protection
The FAN5702 has integrated protection circuitry to prevent the device from being short circuited when the output voltage falls below 2V. If this occurs, FAN5702 turns off the charge pump and the LED driver outputs, but a small bypass switch is left on. The device monitors the output voltage to determine if it is still in short circuit condition and, once it has passed, softstarts and returns to normal operation.
Note: 7. Bold identifies bits that cannot be overwritten.
Bus Timing
As shown in Figure 19, data is normally transferred when SCL is LOW. Data is clocked in to the FAN5702 on the rising edge of SCL. Typically, data transitions shortly at or after the falling edge of SCL to allow ample time for the data to set up before the next SCL rising edge.
Data change allowed
VOUT Over-Voltage Protection
If the output voltage goes above 6V, the FAN5702 shuts down until this condition has passed. The charge pump and LED driver outputs are turned off. Once this condition has passed FAN5702 soft-starts into normal operation.
I2C Interface
The FAN5702's serial interface is compatible with standard 2 and fast I C bus specifications. The FAN5702's SCL line is an input and its SDA line is a bi-directional open-drain output, meaning that it can only pull down the bus when active. The SDA line only pulls LOW during data reads and when signaling ACK. All data is shifted in MSB (bit 7) first.
SDA
TH
SCL
TSU
Figure 19. Data Transfer Timing Each bus transaction begins and ends with SDA and SCL HIGH. A transaction begins with a START condition, which is defined as SDA transitioning from 1 to 0 with SCL HIGH, as shown in Figure 19.
SDA
THD;STA Slave Address MS Bit
Slave Address
The FAN5702's slave address is 6CH.
Table 3. I C Slave Address 7
0
2
6
1
5
1
4
0
3
1
2
1
1
0
0
R/ W
SCL
Figure 19. Start Bit
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
A transaction ends with a STOP condition, which is defined as SDA transitioning from 0 to 1 with SCL HIGH, as shown in Figure 20.
Slave Releases Master Drives tHD;STO
During a read from the FAN5702 (Figure 23), the master issues a "Repeated Start" after sending the register address and before resending the slave address. The "Repeated Start" is a 1-to-0 transition on SDA while SCL is HIGH, as shown in Figure 21.
Slave Releases tSU;STA tHD;STA SLADDR MS Bit ACK(0) or NACK(1)
SDA
ACK(0) or NACK(1)
SDA
SCL
SCL
Figure 20. Stop Bit Figure 21 Repeated Start Timing
Read and Write Transactions
The following figures outline the sequences for data read and write. Bus control is signified by the shading of the packet, defined as
Master Drives Bus
2
and
Slave Drives Bus
. All addresses and data are MSB first.
Table 5. I C bit Definitions for Figure 22 and Figure 23. Symbol
S A
A
Definition
START. See Figure 19. ACK. The slave drives SDA to 0 to acknowledge the preceding packet. NACK. The slave sends a 1 to NACK the preceding packet. Repeated START. See Figure 21. STOP. See Figure 20.
R P
7 bits
S Slave Address 0
0 A
8 bits
Reg Addr
0 A
8 bits
Data
0 A P
Figure 22. Write Transaction
7 bits
S Slave Address 0
0 A
8 bits
Reg Addr
0 A R
7 bits
Slave Address 1
0 A
8 bits
Data
1 A P
Figure 23. Read Transaction
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
Register Descriptions
The following tables define the operation of each register bit. Bold values are power-up defaults. These values apply only to I C version of the part.
2
Bit
GENERAL 7 6,5 4 3 2 1 0 CONFIG 7 6 5 4 3 2 1,0 CHA 7:6 5:0 CH3 7:6 5:0 CH4 7:6 5:0 CH5 7:6 5:0 CH6 7:6 5:0
Name
Default Value
Default: 00H General Purpose Register 0 00 0 0 0 0 0 Default: 00H 0 0 0 0 0 0 00 11 0 - 63 00 - 3FH Default: 11 0 - 63 00 - 3FH 11 0 - 63 00 - 3FH 11 0 - 63 00 - 3FH 11 0 - 63 00 - 3FH
Description
ADDR = 10H
PWM FS1, FS2 EN6 EN5 EN4 EN3 ENA
Setting this bit=1 changes the EN pin to function as a PWM dimming input for group A LEDs. This bit must be set to zero for the chip to be disabled. 00=20mA (default), 01=30mA, 10=15mA, 11=8mA when I C is used. Default=0 (Off), LED Channel Active=1 Default=0 (Off), LED Channel Active=1 Default=0 (Off), LED Channel Active=1 Default=0 (Off), LED Channel Active=1 Default=0 (Off), LED Channel Active=1 Configuration Register ADDR = 20H Tie channel 5 and 6 together. Default=0 (Separate). Group 5&6 =1. Both currents are set by CH5 register. T56 is overwritten by either S5A or S6A. Tie channel 3 and 4 together. Default=0 (Separate). Group 3&4 =1. Both currents are set by the CH3 register. T34 is overwritten by either S3A or S4A. CH6 group configuration. Independent=0 (default); part of group A=1. CH5 group configuration. Independent=0 (default); part of group A=1. CH4 group configuration. Independent=0 (default); part of group A=1. CH3 group configuration. Independent=0 (default); part of group A=1. Sets current ramp rate for group A channels Group A Brightness Control ADDR = A0H
2 2
T56 T34 S6A S5A S4A S3A RS1, RS0
Default: FFH Reserved Brightness A
Vendor ID bits. These bits can be used to distinguish between vendors via I C. Writing to these bits does not change their value. 6-bit value that controls group A brightness per values in Table 1 Channel 3 Brightness Control ADDR=30H
Reserved Brightness 3
Writing to these bits does not change their value. 6-bit value that controls channel 3 brightness per values in Table 1 Channel 4 Brightness Control ADDR = 40H
Default: FFH Reserved Brightness 4
Writing to these bits does not change their value. 6-bit value that controls channel 3 brightness per values in Table 1 Channel 5 Brightness Control ADDR = 50H
Default: FFH Reserved Brightness 5
Writing to these bits does not change their value. 6-bit value that controls channel 3 brightness per values in Table 1 Channel 6 Brightness Control ADDR = 60H
Default: FFH Reserved Brightness 6
Writing to these bits does not change their value. 6-bit value that controls channel 3 brightness per values in Table 1
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
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FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
Physical Dimensions
0.03 C 2X
E
A B
F 0.40 A1
(O0.20) Cu Pad
BALL A1 INDEX AREA
D 0.40 0.03 C 2X (O0.30) Solder Mask Opening
TOP VIEW
0.06 C 0.05 C 0.625 0.547
RECOMMENDED LAND PATTERN (NSMD PAD TYPE)
E
0.3780.018 0.2080.021
C
SEATING PLANE
D
SIDE VIEWS
NOTES:
A. NO JEDEC REGISTRATION APPLIES.
0.005 0.40 D C B A 1234 (X) 0.018 F O0.2600.02 16X CAB
B. DIMENSIONS ARE IN MILLIMETERS. C. DIMENSIONS AND TOLERANCE PER ASME Y14.5M, 1994. D. DATUM C IS DEFINED BY THE SPHERICAL CROWNS OF THE BALLS. E. PACKAGE NOMINAL HEIGHT IS 586 MICRONS 39 MICRONS (547-625 MICRONS). F. FOR DIMENSIONS D, E, X, AND Y SEE PRODUCT DATASHEET. G. DRAWING FILNAME: MKT-UC016AArev2.
0.40
(Y) 0.018
BOTTOM VIEW
Figure 24. WLCSP-16, 0.4mm Pitch, Dimensions
Product-Specific Dimensions
Product
FAN5702UCxx
D
1.610mm
E
1.610mm
X
0.205mm
Y
0.205mm
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild's worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor's online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/.
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
www.fairchildsemi.com 15
FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
Physical Dimensions (Continued)
0.10 C 2X
3.00
A B 3.00 1.75
3.00
1.75 3.00 PIN 1 IDENT 0.10 C
TOP VIEW
0.55 MAX 0.10 C 0.08 C
2X
16X 0.75 (0.15) 0.50 16X 0.30
0.05 0.00
RECOMMENDED LAND PATTERN
C
SEATING PLANE
SIDE VIEW NOTES:
PIN #1 IDENT 1 16 0.50 13 12 0.50
1.75 1.65 4 5 1.75 1.65 8 9
A. DESIGN CONFORMS TO JEDEC MO-248. B. DIMENSIONS ARE IN MILLIMETERS. C. DIMENSIONS AND TOLERANCES PER ASME Y14.5M, 1994. D. LAND PATTERN RECOMMENDATION FROM PCB MATRIX IPC LP CALCULATOR (V2009). E. DRAWING FILENAME: MKT-UMLP16Brev1.
16X 0.42 0.32 16X 0.30 0.20 0.10 0.05 CAB C
BOTTOM VIEW
Figure 25. UMLP-16, 3.0 x 3.0 x 0.55mm Pitch, Dimensions, Preliminary
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. Package specifications do not expand the terms of Fairchild's worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor's online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/.
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
www.fairchildsemi.com 16
FAN5702 -- Configurable 180mA 6-LED Driver with I2C Control
(c) 2010 Fairchild Semiconductor Corporation FAN5702 * Rev. 1.0.3
www.fairchildsemi.com 17

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