Mitsubishi M62255FP Datasheet
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GENERAL PURPOSE BATTERY CHARGER CONTROL IC
Notice: This is not a final specification.
Some parametric limits are subject to change.
DESCRIPTION
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)
MITSUBISHI<Dig./Ana. INTERFACE>
M62255FP
PIN CONFIGURATION (TOP VIEW)
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
M62255FP
24P2Q-A
24
23
22
21
20
19
18
17
16
15
14
13
Vc
VDET
IDET
ISENSE1 -
ISENSE1 +
IN1
IN2
IN3
IN4
DOUT
ISENSE2 -
ISENSE2 +
APPLICATION
Note.P.C, Video camera and general battery charger for other
digital equipment
BLOCK DIAGRAM
Vcc
ADJ
REF IN
OSC
PGND
GND
SW
Output
Drive circuit
PWM
Comp
OSC
To Internal Circuit
Power
Save
Vc
Voltage
control
OPAmp
IDET
Current
control
OPAmp
Vref
8bit
D-A
Converter
Logic Circuit
ISENSE2 -ISENSE2 +
Discharge Current
Detect Circuit
Vref
3bit
Vref
4bit
DCDOUT
Charge Current
Detect Circuit
Output Voltage
Detect Circuit
Multiplexer
&
Level
Magnification
Circuit
ISENSE1 +
ISENSE1 -
VDET
IN1
IN2
IN3
IN4
PS
CK DI DOUT
CS
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1
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<DESCRIPTION OF TERMINALS>
MITSUBISHI<Dig./Ana. INTERFACE>
M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC
Pin No. Symbol
7
6
8
15
11
10
19
18
17
16
20
21
13
14
9
DI
CK
CS
DOUT
ADJ
REF IN
IN1
IN2
IN3
IN4
ISENSE1+
ISENSE1-
ISENSE2+
ISENSE2-
DCDOUT
Function
The serial data input pin which used to receive 8-Bit wide serial data
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
The reference voltage input pin of the A-D converter
The A-D converter input pin
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
23
22
24
1
3
5
12
4
3
VDET
IDET
VC
SW
OSC
PS
Vcc
GND
PGND
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
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<ABSOLUTE MAXIMUM RATINGS>
MITSUBISHI<Dig./Ana. INTERFACE>
M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC
Symbol Conditions
Vcc
Isw
Vsw
VPS
Pd
KTHETER
Topr
Tstg
Parameter
Supply voltage
SW drive current
SW max. voltage
PS max. voltage
Power dissipation
Thermal derating ratio
Operating temperature
Storage temperature
Ta=25°C
Ta>25°C
THERMAL DERATING (MAXIMUM RATING)
1000
950
Ratings
28
50
Vcc
7
950
9.5
-20 – +75
-40 – +125
Unit
V
mA
V
V
mW
mW/ °C
°C
°C
800
600
400
200
POWER DISSIPATION Pd (mW)
0
0 25 50 75 100 125
AMBIENT TEMPERATURE Ta (°C )
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3
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MITSUBISHI<Dig./Ana. INTERFACE>
M62255FP
GENERAL PURPOSE BATTERY CHARGER CONTROL IC
<ELECTRICAL CHARACTERISTICS>
Symbol Unit
Block
Vcc
Icc1
All block
Vref Input reference voltage
ISWL
PWM
VDET-IN
IDETB
VISENSE1+
VISENSE1- ISENSE1- input voltage range
VISENSE2+
VISENSE2-
VCH Charge voltage of fixed voltage
Charge detection block
VICH
DNL
Supply voltage
Circuit current
Circuit current at power saveIcc2
Main-SW output saturation voltageVsatM
SW output leak current
VDET input voltage range
VDET input bias current
ISENSE1+ input voltage range
ISENSE2+ input voltage range
ISENSE2- input voltage range
Charge current detection voltage of
fixed current
Differential nonlinearity at 8 bit DAC
PS input voltage VPS=2.0v
Isw=50mA
Vref=5.0v, Voltage control data is 4.2v
selected at Reset
Vref=5.0v, Current control data is
160mV selected
Vref=5.0v
(Ta=25°C, Vcc=15V)
Test conditionParameter
Limits
Min
Typ Max
7.5
4.0
7.0
50
5.0
0.9
-1 1
0.6
-1
2.0
2.0
2.0
2.0
Vcc-0.5
Vcc-0.5
Vcc+1.5
Vcc+1.5
4.20
160
-1
22
10.0
80
1.2
5.0
0
4.224.18
180140
1 LSB
V
mA
µA
V
V
µA
µA
µA
V
V
V
V
V
mV
VIN-IN
IIN
Level Mag.
VDOUT
fosc
Ioscch
Ioscdis
OSC
TDUTY Maxmum ON duty
Vosch
Voscl
V DIH
V DIL
V CSH
V CSL
IN input voltage range
IN input current
DOUT output voltage range
Oscillation frequency
Oscillation charge current
Oscillation discharge current
Oscillation output high level
Oscillation output low level
DI input high level
DI input low level
CS input high level
CS input low level
V CKH CK input high level
Inter Face
V CKL CK input low level
V PSH
V PSL
PS input high level
PS input low level
Cosc = 390pF
0.3
-100
0.5
70 130
-150
100
-120
20 30 40
95
0.85
0.35
0.95
0.4
1.05
0.45
3.5
0
3.5
0
3.5
0
1.0
1.5 V
0
5
0
5
KHz
-90
6.0
0.5
6.0
0.5
6.0
0.5
0.3 V
V
nA
V
µA
µA
%
V
V
V
V
V
V
V
V
4
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