MITSUMI
IC for Control of Lithium-ion Betteries Charging MM1438
Block Diagram
Pin Description
Pin No. Pin name
1
2
GND
LV
SW2
SW1
V
CC
EXT
CEL
I/O
Input
Output
Input
Input
Input
Output
Input
Ground pin
Low voltage detection circuit output pin
ON with NPN-Tr open collector output at low voltage
Low voltage detection circuit ON/OFF control input pin
SW2 = V
CC
: OFF, SW2 = GND: ON
ON/OFF control input pin for the IC
SW1 = V
CC
: OFF, SW1 = GND: ON
Power supply input pin
Charging control output pin
Battery voltage input pin
Detects battery voltage and controls rated voltage to the prescribed voltage value.
Current detection pin
8
CS
Input
Detects current by drop in external resistor voltage and controls rated current.
Current value can be set at 0.1V/R1 typ.
Controls external PNP-Tr to control charging.
Pin Description
3
4
5
6
7
MITSUMI [ MITSUMI ELECTRONICS, CORP. ]
