MM1438 查看數據表（PDF） - Mitsumi
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MM1438 Datasheet PDF : 7 Pages
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MITSUMI
IC for Control of Lithium-ion Betteries Charging (one cell) MM1438
IC for Control of Lithium-ion Betteries Charging (one cell)
Monolithic IC MM1438
Outline
This IC is used to control charging of lithium-ion batteries consisting of a single cell. It is a modification of the
previous MM1332 charging-control IC, with improved charging voltage accuracy and a smaller package.
A low voltage circuit is built in (operates at SW2 = “L” ) that can prohibit low voltage battery (2.15V typ.)
charging. When SW2 = “H”, the low voltage circuit is turned off and even a low voltage battery can be
charged.
Series Table
Temperature conditions A: Ta=-25~75°C, B: Ta=-20~70°C, C: Ta=0~50°C,
D: Ta=0~40°C
* Package
SOP-8C, 8E VSOP-8A, 8B TSOP-16A
TSOP-24A
Output
voltage (V)
Output
voltage
temperature
conditions
Full charge
detection
voltage (mV)
Over voltage
detection Remarks
voltage (v)
AW
MM1438
BW
4.125±0.030
C
4.225±0.030
C
1cell
1cell
Features
1. Charging voltage accuracy (Ta=25°C)
2. Charging voltage accuracy (Ta=0 to 50°C)
3. Consumption current (charging on)
4. Consumption current (charging off)
5. Low-voltage detection
6. Leakage current between CEL and CS
±25mV/cell
±30mV/cell
250µA typ.
2µA typ.
2.15V typ.
1µA max.
Package
VSOP-8B
Applications
IC for control of lithium-ion batteries charging.
Pin Assignment
8765
1234
VSOP-8B
1
GND
2
LV
3
SW2
4
SW1
5
VCC
6
EXT
7
CEL
8
CS
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