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DESCRIPTION
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M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC
Notice: This is not a final specification. Some parametric limits are subject to change.
PIN CONFIGURATION (TOP VIEW)
The M62255FP is intended to be used a general purpose battery charger control for Note PC. The M62255FP contains the functions which are required for the battery charge control ,on single chip using low peripheral component requirement . The M62255FP can handle battery charge control, monitor battery temperature and prevent from over current and voltage with microcomputer. It contains DC-DC converter circuit which can be used for the feedback control of the charge current and the output voltage. It is the best fit for Smart Battery Charger.
FEATURES
*Built-in 3 wire serial data interface for MCU. *Built-in multiplexer and level magnification circuit with 4 input ports. *Built-in DC-DC converter circuit for PWM function *Built-in two current detection circuits. These circuits can detect charge current and discharge current *ON/OFF control with low power dissipation mode. (Power save)
SW PGND OSC GND PS CK DI CS DCDOUT REF IN ADJ Vcc
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
Vc VDET IDET ISENSE1 ISENSE1 + IN1 IN2 IN3 IN4 DOUT ISENSE2 ISENSE2 +
24P2Q-A
M62255FP
APPLICATION
Note.P.C, Video camera and general battery charger for other digital equipment
BLOCK DIAGRAM
SW Vc IDET ISENSE2 + ISENSE2 - DCDOUT
Vcc ADJ REF IN
PWM Comp
Output Drive circuit
Current control OPAmp
Discharge Current Detect Circuit
ISENSE1 +
Charge Current Detect Circuit
ISENSE1 -
Vref
Output Voltage Detect Circuit
VDET
OSC
OSC
Voltage control OPAmp
Vref 8bit 3bit
Multiplexer & Level Magnification Circuit
IN1 IN2 IN3 IN4
To Internal Circuit
PGND GND
Power Save
D-A Converter Logic Circuit 4bit
Vref
PS
CK
DI
CS
DOUT
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M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC

Pin No. Symbol Function The serial data input pin which used to receive 8-Bit wide serial data DI 7 6 8 15 11 10 19 18 17 16 20 21 13 14 9 23 22 24 1 3 5 12 4 3 CK CS DOUT
The shift clock input pin which input signal from DI pin to 8-Bit shift register by the rising edge of clock signal When this pin is "Low", DI 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 data
The voltage output pin for adjusting A-D reference voltage ADJ REF IN The reference voltage input pin of the A-D converter IN1 The A-D converter input pin
IN2 IN3 IN4
ISENSE1+ ISENSE1ISENSE2+ ISENSE2DCDOUT
The A-D converter input pin The A-D converter input pin The A-D converter input pin The charge current sense input pin for high side voltage The charge current sense input pin for low side voltage The discharge current sense input pin for high side voltage The discharge current sense input pin for low side voltage The discharge current detect circuit output pin The voltage detection input pin The current detection input pin This pin is used to make connection with capacitor and resistor which are used for phase compensation The pre-drive pin which used to connect the external Pch Tr The pin used to connect capacitor to determine the frequency of ocelot The control pin of power save mode (H : power save mode, L : normal mode) The power supply pin The ground pin The ground pin of power unit
VDET IDET VC SW OSC PS Vcc GND PGND
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M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC

Symbol
Vcc Isw Vsw VPS Pd Topr Tstg
Parameter
Supply voltage SW drive current SW max. voltage PS max. voltage Power dissipation Operating temperature Storage temperature
Conditions
Ratings
28 50 Vcc 7
Unit
V mA V V mW mW/ C C C
Ta=25C Ta>25C
950 9.5 -20 - +75 -40 - +125
KTHETER Thermal derating ratio
THERMAL DERATING (MAXIMUM RATING)
1000
950
POWER DISSIPATION Pd (mW)
800
600
400
200
0 0
25
50
75
100
125
AMBIENT TEMPERATURE Ta (C )
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M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC

Block
(Ta=25C, Vcc=15V) Limits
Min Typ Max
Symbol Vcc Icc1 Icc2 Vref VsatM ISWL IDETB
Parameter
Supply voltage Circuit current Circuit current at power save Input reference voltage Main-SW output saturation voltage SW output leak current
Test condition
Unit V mA A V V A A A V V V V mV LSB V nA V KHz A A % V V V V V V V V V V
All block
7.5 4.0
PS input voltage VPS=2.0v
22 7.0 50 5.0 0.9 10.0 80 1.2 1 5.0 0 Vcc-0.5
Vcc+1.5 Vcc+1.5
PWM
Isw=50mA
-1 0.6 -1 2.0 2.0 2.0 2.0
Vref=5.0v, Voltage control data is 4.2v selected at Reset Vref=5.0v, Current control data is 160mV selected Vref=5.0v
VDET-IN VDET input voltage range
VDET input bias current Charge detection block VISENSE1+ ISENSE1+ input voltage range VISENSE1- ISENSE1- input voltage range VISENSE2+ ISENSE2+ input voltage range VISENSE2- ISENSE2- input voltage range
Vcc-0.5 V
VCH VICH DNL
Charge voltage of fixed voltage Charge current detection voltage of fixed current Differential nonlinearity at 8 bit DAC IN input voltage range IN input current DOUT output voltage range Oscillation frequency
4.18 140 -1 0.3 -100 0.5
4.20 160
4.22 180 1 5 0 5
Level Mag.
VIN-IN IIN VDOUT fosc
Cosc = 390pF
70 -150 20 0.85 0.35 3.5 0 3.5 0 3.5 0 1.0 0
100 -120 30 95 0.95 0.4
130 -90 40 1.05 0.45 6.0 0.5 6.0 0.5 6.0 0.5
Ioscch Oscillation charge current OSC Ioscdis Oscillation discharge current TDUTY Maxmum ON duty Vosch Voscl V DIH V DIL Inter Face V CSH V CSL V CKH V CKL V PSH V PSL
Oscillation output high level Oscillation output low level DI input high level DI input low level CS input high level CS input low level CK input high level CK input low level PS input high level PS input low level
1.5 0.3
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M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC
MSB
DI CK CS D7 D6 First
LSB
8-BIT SHIFT RESISTER
D5 D4 D3 D2 D1 D0
ADDRESS DECODER 6 4
LATCH MPX
LATCH MPX
LATCH MPX
LATCH MPX
LATCH MPX
LATCH MPX
CURRENT VOLTAGE VOLTAGE AMP CONTROL Fine CONTROL SW CONTROL SELECT SW SW
A-D INPUT SELECT REFERENCE SELECT
(MODEL) LSB
DI
MSB D1 D2 D3 D4 D5 D6 D7
D0
CK
CS

Address
D7 0 0 0 0 0 0 0 D6 0 0 0 0 1 1 1 D5 0 0 1 1 0 0 1 D4 0 1 0 1 0 1 0 D3
Control function RESET Current control Voltage control Voltage fine control Amp. select A-D Input select A-D Reference select
Data
D2 D1 D0
Description
A-D Reference voltage = 2.5V Voltage control setting = 4.2V Voltage fine control setting = 0V Current control setting = 20mV
-
-
-
-
See Table 1 See Table 2 See Table 3 See Table 4 See Table 5 See Table 6
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M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC
Table 1 ; 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 input voltage Current ratio
0V 20mV 40mV 80mV 160mV 240mV 320mV
0 1/16 1/8 1/4 1/2 3/4 1
Trickle
* 20mV selected at RESET
Table 2 ;Voltage control data D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
Ref.voltage select 5.0V select 4.84V select 4.68V select 4.52V select 4.36V select 4.20V select 4.04V select 3.88V select 3.72V select 3.56V select 3.40V select 3.24V select 3.08V select 2.92V select 2.76V select 2.60V
Table 3 ;Voltage fine control data D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
fine cntl.voltage
select 0V select -10mV select -20mV select -30mV select -40mV select -50mV select -60mV select -70mV select -80mV select -90mV select -100mV select -110mV select -120mV select -130mV select -140mV select -150mV
* 4.20V selected at RESET
* 0V selected at RESET
* Set-up voltage of Voltage control is fixed by Ref. voltage (at Table2) and fine cntl. voltage (at Table3). Set-up voltage of Voltage control can be fixed at 10mV step between 2.45V and 5.0V. Example1.
table 1 table 2
D3
0
D2
1
D1
0
D0
1
D3
1
D2
0
D1
1
D0
0
Set-up voltage; 4.20V(Ref. voltage) - 100mV(fine cntl. voltage) = 4.10V Example2.
table 1 table 2
D3
1
D2
0
D1
0
D0
1
D3
1
D2
1
D1
1
D0
1
Set-up voltage; 3.56V(Ref. voltage) - 150mV(fine cntl. voltage) = 3.41V
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M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC
Table 4; Amp select D3 D2 0 0 0 0 1 D1 0 0 1 1 0 D0 0 1 0 1 0
State select Output of Charge Current Detect Amp select Input of Battery Voltage Detect Amp select Output of Battery Voltage Detect Amp select Output of Discharge Current Detect Amp select Output of A/D reference Voltage
* Output of Battery Voltage Detect Amp is selected at RESET
Table 5; A-D Input select D3 D2 D1 0 0 1 1 D0 0 1 0 1
State select IN1 select IN2 select IN3 select IN4
* IN1 is selected at RESET
Table 6; A-D Reference voltage select D3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
State select 5.0V select 4.69V select 4.38V select 4.06V select 3.75V select 3.44V select 3.13V select 2.81V select 2.50V select 2.19V select 1.88V select 1.56V select 1.25V select 0.94V select 0.63V select 0.31V
* 2.50V is selected at RESET
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M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC
BLOCK DESCRIPTION
(1) Battery Voltage Detect BLOCK
1
1
ISENSE2 x10
ISENSE2+ ISENSE1 -
x10
ISENSE1+ DI IN1
Serial-Parallel Converter Circuit
Serial Data from MCU
CK CS
IN2 IN3 IN4
3 5.0V Reference Voltage for A-D Converter 0.31V
1
DOUT
to A-D input of MCU Fig.1 Block Diagram of Multiplexer and Level Magnification Circuit
Multiplexer and Level Magnification Circuit of M62255 consists from Reference Voltage, 4times amplifier, 10times Amplifier and 4input Multiplexer. When setting the reference voltage correspond to detecting voltage by serial data from MCU, this set voltage supply to reference voltage for A-D converter. The difference between input voltage of IN1 - IN4 and reference voltage is multiplied by 4 at the center of this setting voltage. This multiplied voltage is supplied to A-D input of MCU from DOUT terminal. The resolution of A-D converter of MCU is improved by 2-Bit as against the difference of IN1-IN4 input.
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M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC
4.9V
3.7V 2.5V 1.3V 0.1V 1.2V 0.3V 3.1V 2.8V 2.5V 2.2V 1.9V
To DOUT
Reference Voltage
To DOUT
4times Amplifier Fig.2 Description of Level Magnification
input voltage
Output voltage of DOUT is fixed as follows; VDOUT = (VIN - Vref) x 4 + Vref (V) ---------------- (1) VDout ; Output voltage of DOUT VIN ; Voltage of IN1 (or IN2,IN3,IN4) Vref ; Reference voltage for A-D converter In Fig.2 Reference Voltage is 2.5V. When Input voltage of IN1 (or IN2,IN3,IN4) is set at 2.8V, the difference between input voltage and Reference Voltage is 0.3V. The difference voltage (0.3V) multiplied by 4 is 1.2V. 1.2V added to Reference Voltage(2.5V) makes 3.7V which is output voltage of VDOUT. The range of output voltage of VDOUT is between 0V and 5V. So in Fig.2 the range of input voltage of IN1(or IN2,IN3,IN4) is between 1.9V and 3.1V. (This range of input voltage is difference from selected Reference Voltage.)
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M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC
Charge Current of Current Detect R is multiplied by 10 and outputted from DOUT. M62255 is for the floating detection type. Current Detect R is connected to + terminal of battery.So M62255 is best fit for SMBus system ,because the common GND can be given between PC system and the charger circuit. Discharge current is detected by the same method as charge current.Detecting discharge current can be used for monitoring the current consumption and the remnant of the battery.
Current Detect Circuit
ISENSE+
To 10times Amplifier
Charge Current Detect R
ISENSE -
To 4times Amplifier
Fig.3 Detector Circuit of Battery Voltage / Charge Current
Multiplexer Circuit
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Battery
IN1 - N4

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SW A
22 600K 100 100 0.022 200K 300 0.1 0.1
ChgSW DchgSW
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AC Adaptor
A NT
From MCU
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ISENSE2+ SW ISENSE2Vcc
Battery 1 Battery 2
5V Reg
REF IN
OSC
M62255
IN1 IN2 IN3 CK DI CS DOUT IN4
390p
From each Battery
Battery 3
PGND
GND PS
150K
Battery 4 3 From MCU To MCU
MITSUBISHI
M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC
PS 5v
Normal
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M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC
PACKAGE OUTLINE
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