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Mitsubishi Semiconductor < DIGI*ANA Interface >
M62254FP
Standard Battery Charger Controller
DESCRIPTION
The M62254FP is designed as standard battery charger controller. The M62254FP has functions which require for the battery charge control on single chip. Not only the combination of M62254 and MCU capable of handling battery charge control, but also it is capable of monitoring battery temperature, prevent from over current or voltage, using minimal peripherals. It also has feedback function to the primary source of SW power supply, which can used to control feedback of charge current and output voltage.
Pin layout(Top view)
1 OP IN1+ OPIN1- 2 LED1 3 LED2 4 LED3 5 P.GND 6 MSW1 7 MSW2 8 SSW 9 CD 10 REF 11 IN1 12 IN2 13 IN3 14 IN4 15 ISENSE 16 DOUT 17 RESET 18 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19
FEATURE
Built-in Reset circuit and WDT function Built-in Multiplexer and Level magnification circuit with 4 input ports Built-in two standard stand alone OPAmp Built-in Sub-switch circuit with feedback function Built-in 3 line serial data interface function Built-in Low inputAEoutput operation 5V voltage regulator function Built-in Charge current/output voltage control circuit
OPOUT1 OPOUT2 OP IN2+ OP IN2P.C GND Iadj IDET V DET TC WD Ctd CS CK DI VB Vcc V DD
36P2R
M62254FP
APPLICATIONS
Video camera, Hand carry telephone and general battery charger for other digital equipments
Block diagram
VDET Iadj IDET 28 30 29
Vcc VB V DD 20 21 19
Voltage regulator Voltage control circuit
LED1 LED2 LED3 MSW1 MSW2 3 4 5 7 8
LED driver circuit Main SW driver
SSW 9
Sub SW driver
P.C 32
Voltage control OP
+
+
OPOUT1 36
Current control OP
/
/
/
Driver detection circuit
10 CD
/
Current control circuit
+
Serial Parallel conversion circuit
/ /
Amp1 9 1
/
CS IN CLOCK
+
Amp2
16 ISENSE 12 IN1 13 IN2 14 IN3 15 IN4
1
OPOUT2 35
Reset circuit WDT
+
3
+
33 2 25 6 34 1 18 27 26 24 22 23 17 OPIN2- OP IN2+ OP IN1- OP IN1+ Ctd P.GND RESET TC WD CS DI CK DOUT
-
11 REF
31 GND
Mitsubishi Semiconductor < DIGI*ANA Interface >
M62254FP
Standard Battery Charger Controller Digital Data Format MSB
DI CK D7 D6 D5
LSB 8 bit Shift register
D4 D3 D2 D1 D0
CS
Address decoder
8
Latch MPX Current control SW Latch MPX Voltage control SW Latch MPX LED drive SW Latch MPX Main SW Latch MPX Sub SW Latch MPX Input Amp SW Latch MPX A-D input SW
4
Latch MPX Reference voltage SW
Data Setting
Address D7 0 D6 0 D5 0 D4 0 D3 Data D2 D1 D0
Control Function RESET
Description
-
-
-
-
All SW is OFF A-D reference voltage=0.4V Voltage setting reference voltage = 4.0V See Table 1 See Table 2 See Table 3 See Table 4 See Table 5 See Table 6 See Table 7 See Table 8
Current control Voltage control LED driver select Main SW Sub SW Amp.select A-D input select A-D Reference select
0 0 0 0 0 0 0 1
0 0 0 1 1 1 1 0
0 1 1 0 0 1 1 0
1 0 1 0 1 0 1 0
-
-
-
-
Mitsubishi Semiconductor < DIGI*ANA Interface >
M62254FP
Standard Battery Charger Controller
Table1: Current control data D3 0 0 0 0 0 0 0 0 D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 D0 0 1 0 1 0 1 0 1 Current control OPAmp input voltage 0V 20mV 40mV 80mV 160mV 240mV 320mV - Current Ratio 0 1/16 1/8 1/4 1/2 3/4 1 Tricle
* During trickle charge, use constant voltage mode and charge directly to the battery using external resister * 20mV is selected at RESET Table2: Voltage control data
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 Voltage control OPAmp input voltage 0V 0.4V 0.8V 1.2V 1.6V 2.0V 2.4V 2.8V 3.2V 3.6V 4.0V 4.4V 4.8V Voltage Ratio 10 1 2 3 4 5 6 7 8 9 10 11 12
* Output port of MCU can be used to control the voltage and current settings * 4.0V is selected at RESET
Table3: LED driver select D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 D0 0 1 0 1 0 1 0 1 LED3 LED2 LED1 OFF OFF OFF OFF ON ON ON ON OFF OFF ON ON OFF OFF ON ON OFF ON OFF ON OFF ON OFF ON
Table4: Main SW D1 0 0 1 1 D0 0 1 0 1 SW1 SW2 OFF OFF OFF ON ON OFF Not Select
Mitsubishi Semiconductor < DIGI*ANA Interface >
M62254FP
Standard Battery Charger Controller
Table5: Sub SW D0 0 1 SW OFF ON Table8: A-D Reference voltage select D3 D2 D1 D0 State Select 0V Select 0.4V Select 0.8V Select 1.2V Select 1.6V Select 2.0V Select 2.4V Select 2.8V Select 3.2V Select 3.6V Select 4.0V Select 4.4V Select 4.8V
Table6: Amp. select D1 0 D0 0 State Select Amp1 output
0 1 Select Amp2 input 1 0 Select Amp2 output * Amp1 output is selected at RESET Table7: A-D input select D1 0 0 1 1 D0 0 1 0 1 State Select input 1 Select input 2 Select input 3 Select input 4
0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 0 0 1 0 1 0 1 1 0 0 1 1 1 1 0 0 0 1 0 0 1 1 0 1 0 1 0 1 1 1 1 0 0 * 0.4V is selected at RESET
Note: All outputs will be OFF at RESET
* Input 1 is selected at RESET
Function block descriptions
(1) A-D converter input
~
+
~
-
4.8V
REF 1
Voltage regulator reference voltage
+
0.4V
3
-
*
*Connect few 1000pF capacitor to stabilize the reference voltage
Select the desire reference voltage to be detected by serial data from the MCU. The input voltage level of IN1~IN4 will be magnified 4 times using selected reference voltage as a center. This magnified data will be return to the A-D input port of the MCU. As result, accuracy of the A-D converter of the MCU will be increased by 2 bit. (2) +5V voltage regulator IDD
Q1 +5V
since it is capable of driving external PNP Tr. base up to 20mA, it can supply current of IDD MAX = 20mA x Q1hFE. Also, since this is low I/O type power source, it can operate VCC MIN = VCC - VDD = 0.1V.
Vcc
VB
VDD
Mitsubishi Semiconductor < DIGI*ANA Interface >
M62254FP
Standard Battery Charger Controller
(3) Watch Dog Timer
5V VTH+VTH
VTH
VDD
0V 2.7V
TC
0V
0.2V
WD
0V
t WDIN
RESET
0V
td 1 2
t RT(1) t RT(2) 34
t WD
5
67
8
9
1 When VDD reaches 4.75V (VTH1+VTH1); after fixed amount of time (td), Reset pin outputs "High" and begin charging of the condenser connected TC pin. 2 3 When TC pin reaches 2.7V (VTH2(H)); the condenser connected TC pin begin discharge, and the Reset pin outputs "Low". During the Reset outputs "High" for the first time; the time of charge will be tWD + tRT(1), since TC pin begin charging its condenser starting from 0V. 4 When TC pin drops to 0.2V (VTH2(L)); the Reset will outputs "High" again. At same time, TC pin will begin charging again. Unless correct clock input is given to WD pin, the TC pin will repeats the charging from 0.2V to 2.7V, and the Reset will also repeats "High" during the tWD cycle, and "Low" during tRT(2) cycle. 5 6 When correct clock input is given to WD pin before TC pin reaches 2.7V, the Reset holds "High" output. 7 8 When incorrect clock is given to WD pin, the TC pin will repeats the charging from 0.2V to 2.7V, and the Reset will also repeats "High" during the tWD cycle, and "Low" during tRT(2) cycle. 9 When VDD drops down to 4.25V (VTH1), the Reset circuit will function, and it will output "Low" to Reset pin and TC pin changes to discharging state. (4) Reset circuit VTH1 VTH1 1 When VDD reaches 4.75V (VTH1+VTH1), the Reset outputs "High" after fixed amount of time (td). 2 When VDD drops below 4.25V (VTH1), the Reset outputs "Low" 3 When VDD reaches 4.75V (VTH1+VTH1) again, the Reset outputs "High" after fixed amount of time (td). Also, Reset output will be "Low" until VDD reaches 0.65V(typ). td 1 2 3 td
VDD
0.65
RESET Output
Mitsubishi Semiconductor < DIGI*ANA Interface >
M62254FP
Standard Battery Charger Controller Word description:
td : The time after VDD reaching Reset release voltage to "High" Reset output. tRT(1) : The time TC pin voltage changes from 0V to VTH2(L), when VDD is given. tWD : The time TC pin voltage changes from VTH2(L) to VTH2(H). tRT(2) : The time TC pin voltage changes from VTH2(H) to VTH2(L). 1. Regarding the pin 25 (Ctd pin) capacity and the delay time (td) The delay time (td) of Reset output can be found using following equation. td = 2x10 5 x Ctd (S)
2. Regarding charge and discharge of pin 27 (TC pin) When incorrect clock is given to the WD pin, the voltage level of TC pin will be changed as show below.
tWD tRT(1) tRT(2)
tRT(1) = 8 x 10 x Ctd tWD = 1 x 10 x CT
4 5
3
(S) (S)
tRT(2) = 2.5 x 10 x CT (S) 3. Regarding the input clock, input pulse width, charging time, and discharging time of pin 26 (WD pin) When correct clock is given to the WD pin, the voltage level of TC pin will be changed as show below. 2.7V TC xV 0.2V t1 t2 tWDIN(MIN) WD t2 = t1 = 1 x 10 x CT x 1 x t1 4
5
x - 0.2 2.5
Please, set the pulse width (tWDIN) more than tWDIN(MIN).
Mitsubishi Semiconductor < DIGI*ANA Interface >
M62254FP
Standard Battery Charger Controller
Pin description
Pin # 24 23 Symbol CS CK Description The serial data input pin which used to receives 8 bit wide serial data. The shift clock input pin which takes the input signal of DI pin to 8 bit shift register by the rising edge of the clock signal. When CS pin is "Low", this pin can receive the data into the 8 bit shift register. The each bit will be latched at rising edge of the clock signal. The output pin of the amplified A-D input. The reference voltage output pin of the A-D converter. The A-D converter input pin. The current sense input pin. The input pin for the current detection to feed back of sub-switch driver. The sub-switch driver output pin. The main switch driver output pin. (Open collector) The LED driver output pin. (Open collector) The stabilized +5V output pin. The pre-drive pin which used to connect the external PNP Tr. The power supply pin. The current detection input pin. The input pin for current detection adjustment. The voltage detection input pin. The feedback pin for voltage and current control. The inverted input pin of Op. amp. The non-inverted input pin of Op. amp. The Op. amp. output pin. (Open collector output) The ground pin. The ground pin of power unit. (Main switch driver and LED driver) The output pin of Reset and WDT. (Pulled up to VDD) The pin used to connect capacitor to determine the time constant of WDT. The input pin of the WDT. The pin used to connect capacitor to determine delay time the output after the Reset.
22 17 11 12~15 16 10 9 7,8 3~5 19 21 20 29 30 28 32 2 , 33 1 , 34 36 , 35 31 6 18 27 26 25
DI DOUT REF IN1~4 ISENSE CD SSW MSW1~2 LED1~3
vDD
VB Vcc IDET Iadj VDET P.C OPIN1-,IN2OPIN1+,IN2+ OPOUT1,2 GND P.GND RESET TC WD Ctd
Mitsubishi Semiconductor < DIGI*ANA Interface >
M62254FP
Standard Battery Charger Controller
Absolute Maximum Ratings
Items Power supply voltage Main switch drive current Sub switch drive current LED drive current Regulator output current P.C drive current Main switch max. voltage Sub switch max. voltage LED max. drive voltage P.C max. voltage Power dissipation Thermal derating ratio Operating temperature Storage temperature Symbols Vcc ISW ISUB ILED IB IPC VSW VSUB VLED VPC Pd Condition Ratings 16 200 -5 30 20 10 Vcc Vcc Vcc Vcc 650 6.5 -20~+85 -40~+125 Unit V mA mA mA mA mA V V V V mW mW/C C C
K
Topr Tstg
Electrical Characteristics (Ta=25C ,Vcc=12V,ISW=50mA,ILED=20mA unless specified otherwise)
Block Items Power supply voltage Circuit current 5V power supply Stabilized voltage output Input variable ratio Load variable ratio Ripple remove ratio Min. I/O voltage difference VDD detection voltage Hysteresis voltage WD input current WDT / RESET WD "H" input voltage WD "L" input voltage TC charge current TC discharge current WDT time Reset timer time Reset output delay time Min. input pulse width Symbols Vcc Icc VDD Reg-in Reg-L R.R VDEF VTH1 VTH1 IWD VWDH VWDL ITCH ITCL IRES = 1mA tWD tRT td tWDIN(MIN) 5 25 100 0.2 1x10 CT 2.5x10 CT 2x10 Ctd 10 20
5 4 5
Conditions
Min VDD+0.2
Standard Typ 15
Max 15
Unit V mA V mV mV dB V
IB = 10mA VDD + 0.2V IDD = 1~100mA f = 120Hz, Vin = 0dbm
4.75
5.00 50 10 60 0.2 4.25 50 0.15
5.25 200 100
4.05 30 VWD = +5V 3.5
4.45 80
V mV mA V
1.5
V A A V S S S s
Reset output saturation voltage VRESL
0.4
Mitsubishi Semiconductor < DIGI*ANA Interface >
M62254FP
Standard Battery Charger Controller
Electrical Characteristics (Ta=25C ,Vcc=12V,ISW=50mA,ILED=20mA unless specified otherwise)
Items Main SW "L" output voltage Driver Sub SW "L" output voltage LED "L" output voltage Sub SW detection voltage Control Op. Input voltage range Input bias current P.C "L" output voltage Input offset voltage Input bias current Input offset current Op Amp. Phase input range Open loop gain Through rate Output voltage range Output sink current ISENSE input voltage range Voltage Mag. IN input voltage range IN input current VPCL VIo IIB IIO VICM AV SR VOR Isink VISENSE VIN IIN Vcc 7V Vcc = 5.5V 0.2 0.2 -100 0.2 20 0.5 5 3.5 4 Vcc -0.3 80 -100 100 Vcc-2 IPC=5mA Symbols VsatM Vsats VsatL VCD VIN 0 -1 0.2 2 0.4 7 Conditions IM=50mA Is=5mA ILED=20mA Standard Typ 0.8 0.8 0.8 1.0 Vcc-2 Unit V V V V V A V mV nA nA V dB V/s V mA V V V nA
Min
Max 1.2 1.2 1.2
Tricle current setting resister
To VDD
Main SW Tr.
photo coupler
1
Voltage regulator LED driver circuit Main SW driver Sub SW driver Voltage control circuit Serial Parallel conversion circuit CS IN CLOCK Multiplexer Level magnification circuit Driver detection circuit
2 3 AB
Current detection resister
To battery
Voltage control OP
M62254FP>
+
-
Current control OP
+
Current control circuit MAX 30 mA VDD RESET 4 Reset WDT D8 XIN INT S1 2 3 D0 1 2 345 67 F0 F3 F2 F1 AVSS K1 K0 Reset circuit
battery temperature detection VDD VREF AVDD Battery mount detection switch RAM ROM 1K/2K , 64/128 4K , 256 CNTR VSS
+
M34225M1/M2 M50927
bit MCU with built-in A-D converter SO
+
Ctd When WDT is not used,connect to GND
Mitsubishi Semiconductor < DIGI*ANA Interface >
Standard Battery Charger Controller
M62254FP
CT
Mitsubishi Semiconductor < DIGI*ANA Interface >
M62254FP
Standard Battery Charger Controller
< MCU and its connection layout >
OP IN1+ OP IN1LED1 LED2 LED3 P.GND MSW1 MSW2 SSW CD REF IN1 IN2 IN3 IN4 ISENSE DOUT RESET RESET INT AVss VREF K0 K1 AVDD NC S0 S1 S2 S3 NC NC D0 D1 (0V)CNVss (0V)Vss
1 2 3 4
36 35 34 33
6 7 8 9 10 11 12 13 14 15 16 17 18
M62254FP
5
32 31 30 29 28 27 26 25 24 23 22 21 20 19
OP OUT1 OP OUT2 OP IN2+ OP IN2P.C GND Iadj IDET VDET TC WD Ctd CS CK DI VB Vcc VDD V DD (5V) CNTR X IN XOUT NC NC F3/SIN F2/SOUT F1/CLK F0/SRDY NC D8 D7 D6 D5 D4 D3 D2
1 2 3 4 5 6 7 8 9
36 35 34 33 32 31 30 29 28
11 12 13 14 15 16 17 18
M34225 M50927
10
MCU
27 26 25 24 23 22 21 20 19
Outline : 36P2R
Actual size

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