MITSUMI MM1332

Control of Lithium Ion Batteries Charging MM1332
MITSUMI
Control of Lithium Ion Batteries Charging
Monolithic IC MM1332
Outline
This IC is a high precision constant voltage constant current power source controller for lithium ion batteries
serving as power drivers for P-MOS FET. It was developed for use with one to three cell chargers, and the
constant current value can be set freely with external resistance. It has a built-in amplifier for detecting low
battery voltage. Using this IC enables the easy addition of a lithium ion battery charging function to
conventional battery-charging devices.
Features
1. Output voltage (Ta=-20°C+~70°C)
3Cell : 12.3V/12.6V±150mV
2Cell : 8.2V/8.4V±100mV
1Cell : 4.1V/4.2V±50mV
250µA typ.
set by external resistance
0.1V=external resistance current value
2.0V/cell
2. Current consumption
3. Constant current output
Current limit (reference voltage)
4. Low voltage detection function (LV)
Package
SOP-8C, SOP-8E (MM1332 F)
The box represents the output (charging) voltage rank.
*
Applications
1. For charging lithium ion batteries
2. High-precision
Stable power sources for all types of equipment
Absolute Maximum Ratings
(Ta=25°C)
Item
Symbol
Rating
Units
Storage temperature
TSTG
-40~+125
°C
Operating temperature
TOPR
-20~+70
°C
Power supply voltage
VCC max.
-0.3~+18
V
Output voltage
VO max.
-0.3~VCC
V
SW input voltage
VSW
-0.3~VCC+0.3
V
Allowable power dissipation
Pd
300
mW
Control of Lithium Ion Batteries Charging MM1332
MITSUMI
Electrical Characteristics
Item
(Unless otherwise specified Ta=25°C, VCC=5V/CEL)
Symbol
Operating power supply
voltage range
Measurement Conditions
VCC
Min
Typ. Max. Units
5.0
17.0
V
Current consumption 1
ICC1
VSW1=VSW2=OV (Charge : ON)
250
µA
Current consumption 2
ICC2
VSW1=VSW2=VCC (Charge : OFF)
2
µA
Output voltage
VO
Current limits
VCL
CEL-CS resistance
RCEL
SW1 input current
ISW1
SW1 input voltage
Ta=-20~+70°C, MM1332A, B, C
4.05
4.10
4.15
Ta=-20~+70°C, MM1332D, E, F
4.15
4.20
4.25
90
100
110
MM1332A, B, C
820
MM1332D, E, F
840
Charge : ON
VH1
Charge : OFF
Low-voltage detection voltage
LV
SW2 input current
ISW2
output leak current
Low voltage detection
output saturation voltage
* : MM1332
-0.3
2.0
VCC
VCC
-1.0
+0.3
1.90
2.00
2.10
G Rank
2.00
2.15
2.30
20
Low-voltage detection circuit : ON
VH2
Low-voltage detection circuit : OFF
SW2 input voltage
Low voltage detection
µA
A~F Rank
VL2
VLV
A : Output voltage 4.1V -for 1cell
B : Output voltage 8.2V -for 2cell
C : Output voltage 12.3V -for 3cell
D : Output voltage 4.2V -for 1cell
E : Output voltage 4.4V -for 2cell
F : Output voltage 12.6V-for 3cell
G : Output voltage available
ISINK=1mA
2.0
VCC
VCC
-1.0
+0.3
0.2
V
V
V/sell
µA
-0.3
ILV
mV
kΩ/sell
20
VL1
V/sell
V
V
0.2
µA
0.4
V
Control of Lithium Ion Batteries Charging MM1332
MITSUMI
Pin Assignment Description
8
7
6
5
1
2
3
4
SOP-8C/SOP-8E
Pin No. Name
I/O
Description
Charging ON/OFF control input pin.
1
SW1
Input
SW1=VCC : OFF, SW1=GND : ON
Goes OFF when open as it is pulled up to VCC.
Low voltage detection circuit ON/OFF control input pin.
2
SW2
Input
SW2=VCC : OFF, SW2=GND : ON
Goes OFF when open as it is pulled up to VCC.
3
LV
Output
4
GND
5
CS
Input
6
CEL
Input
7
EXT
Output
8
VCC
Low voltage detection circuit output pin.
NPN-Tr open collector output; goes ON (low level) for low voltage.
Ground pin.
Current detection pin. Detects current when external resistor voltage drops and
controls current. Reference voltage 0.1V=external resistance
Battery voltage input pin
current value
*
Six types depending on rank : 4.1V, 8.2V, 12.3V, 4.2V, 8.4V, 12.6V, (TYP.)
Constant voltage circuit output pin. Controls external P-MOS FET gate and
charges constant voltage.
Power supply input pin.
Constant voltage circuit input pin
*G : External
resistance ratio (R1 : R2) enables setting constant voltage circuit output voltage.
Low voltage detection voltage is set for one cell (4.1V or 4.2V).
MITSUMI
Block Diagram
MM1332A, B, C, D, E, F,
MM1332G
Control of Lithium Ion Batteries Charging MM1332