AnaSem Inc.

9

Rev. E09-06

A7B Series

Single-cell Li-ion / Li-polymer Battery Protection IC

.......... Future of the analog world

TYPICAL CONNECTION DIAGRAM

EXTERNAL COMPONENTS

Items

Symbol

Recommended value

Min.

Max.

Resistor 1

R1

330Ω

100Ω

1.0KΩ

Capacitor 1

C1

0.1µF

0.01µF

1.0µF

Resistor 2

R2

3.9KΩ

500Ω

6.0KΩ

restriction resistances at the time of reverse-connecting a charger, or at the time of connecting a charger which

outputs the voltage exceeding the absolute maximum rating of this IC. Please be sure to connect these

components.

If the value of R1 is too large, the over-charge detection voltage and the over-discharge detection voltage will

become high due to the current consumption of this IC. Please use the value within the limits shown in the table.

330Ω is recommended.

If the value of C1 is too small, this IC may be in a shutdown state at the time of the discharge over-current or the

load short-circuiting. Please use the value within the limits shown in the table for stable operation. 0.1μF is

recommended.

Please use the value within the limits shown in the table about the value of R2. In order to reduce the current at

the time of reverse-connecting a charger, we recommend you to choose R1 and R2 so that the sum total become

more than 4KΩ. The recommended value of R2 is 3.9KΩ.

Note)

Battery

R1

C1

R2

IC

The connection diagram and each value of external components shown above are just recommendation.

Including a battery and FETs, please determine the circuit after sufficient evaluation about your actual

application.