BATTERY PROTECTION IC FOR 1-SERIAL TO 4-SERIAL-CELL PACK (SECONDARY PROTECTION)

S-8244 Series

19

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Precautions

• This IC charges the delay capacitor through the delay capacitor pin (ICT pin) immediately when the voltage of one of

batteries V1 to V4 reaches the overcharge voltage. Therefore, setting the resistor connected to the VCC pin to any

value greater than the recommended level causes a reduction in the IC power supply voltage because of charge

current of the delay capacitor. This may lead to a malfunction. Set up the resistor NOT to exceed the typical value.

If you change the resistance, please consult us.

• DO not connect any of overcharged batteries. Even if only one overcharged battery is connected to this IC, the IC

detects overcharge, then charge current flows to the delay capacitor through the parasitic diode between pins where

the battery is not connected yet. This may lead to a malfunction. Please perform sufficient evaluation in the case of

use. Depending on an application circuit, even when the fault charge battery is not contained, the connection turn of

a battery may be restricted in order to prevent the output of CO detection pulse at the time of battery connection.

Battery voltage

Setting voltage

CO pin voltage

ICT pin voltage

CMOS output active “H” and Nch open drain output active “H” products

V1 battery

V2 battery

V3 battery

V4 battery

Internal delay

Delay

• In this IC, the output logic of the CO pin is inverted after several milliseconds of internal delay if this IC is under the

• Any position from V1 to V4 can be used when applying this IC for a one to three-cell battery. However, be sure to

short circuit between pins not in use (SENSE

−VC1, VC1−VC2, VC2−VC3, or VC3−VSS).

• The application conditions for the input voltage, output voltage, and load current should not exceed the package

power dissipation.

• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic

protection circuit.

• ABLIC Inc. claims no responsibility for any and all disputes arising out of or in connection with any infringement of the

products including this IC upon patents owned by a third party.