mm1438 Mitsumi Electronics, Corp., mm1438 Datasheet - Page 2

• Manufacturer Part Number: mm1438
• Description: Lithium-ion Battery Charge Control 1 Cell
• Manufacturer: Mitsumi Electronics, Corp.

MITSUMI
MITSUMI
*1 For example, if charging current (I
*2 Charging current can be controlled by varying resistance value with R
Block Diagram
Pin Description
Pin No. Pin name
1
2
3
4
5
6
7
8
GND
SW2
SW1
EXT
CEL
V
LV
CS
CC
Output
Output
Input
Input
Input
Input
Input
Input
I/O
GND 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
ON/OFF control input pin for the IC
SW1 = V
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
Detects current by drop in external resistor voltage and controls rated current.
Current value can be set at 0.1V/R1 typ.
CHQ
) is set at 0.5A, R
CC
CC
: OFF, SW2 = GND: ON
: OFF, SW1 = GND: ON
1
= 0.2 Ω can be set. (V
Lithium-Ion Battery Charge Control (1 cell) MM1438
Controls external PNP-Tr to control charging.
Pin Description
I
CHG
1
and R
2
CL
.
/I
CHQ
=0.1V/0.5A=R
R2
Control
1
)