• Any products mentioned in this catalog are subject to any modification in their appearance and others for improvements without prior notification.

• The details listed here are not a guarantee of the individual products at the time of ordering. When using the products, you will be asked to check their specifications.

MITSUMI

1cell Li-ion/Li-polymer battery protection IC MD1421ExxCPAL Series

Application Circuit

Discharge

MOS-FET

Charge

MOS-FET

C2

0.1µF

D

S1

(GND)

C1

0.1µF

Rvcc

330

C3

0.1µF

Ridt

2.7k

VCC

S2

V-

Pack-

Pack+

OSC

Overcharge timer

Overdischarge timer

Overcurrent timer

Drive circuit

Drive circuit

Discharge current

Charge current

detection

Charger voltage

detection

Control

circuit

Overcharge

detection

Overdischarge

detection

Reference

Bias circuit

• The resistors that are inserted into each pin are to protect the IC. They help to remove ESD and latch-up

damages.

• The capacitors help to reduce the effects of transient variations in voltage and electromagnetic waves,

and to improve ESD tolerance of the IC.

Please use either C2 or C3, or both of them by request of your application.

• These values in the above figure are for example. Please choose appropriate values.