S-8211CDB-M5T1U datasheet(23/43 Pages) ABLIC

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BATTERY PROTECTION IC FOR 1-CELL PACK

Rev.7.7_03

S-8211C Series

5. Charge overcurrent status

When a battery in the normal status is in the status where the VM pin voltage is lower than the charge overcurrent

detection voltage (VCIOV) because the charge current is higher than the specified value and the status lasts for the

charge overcurrent detection delay time (tCIOV), the charge control FET is turned off and charging is stopped. This

status is called the charge overcurrent status.

The S-8211C Series will be restored to the normal status from the charge overcurrent status when the VM pin voltage

returns to charge overcurrent detection voltage (VCIOV) or higher by removing the charger.

The charge overcurrent detection function does not work in the overdischarge status.

The resistance (RVMD) between the VM pin and VDD pin, and the resistance (RVMS) between the VM pin and VSS pin

are not connected in the charge overcurrent status.

6. 0 V Battery charge function "available"

This function is used to recharge a connected battery whose voltage is 0 V due to self-discharge. When the 0 V

battery charge starting charger voltage (V0CHA) or a higher voltage is applied between the EB and EB pins by

connecting a charger, the charging control FET gate is fixed to the VDD pin voltage.

When the voltage between the gate and source of the charging control FET becomes equal to or higher than the turn-

on voltage due to the charger voltage, the charging control FET is turned on to start charging. At this time, the

discharging control FET is off and the charging current flows through the internal parasitic diode in the discharging

control FET. When the battery voltage becomes equal to or higher than overdischarge release voltage (VDU), the

S-8211C Series enters the normal status.

Caution 1. Some battery providers do not recommend charging for a completely self-discharged battery.

Please ask the battery provider to determine whether to enable or inhibit the 0 V battery charge

function.

2. The 0 V battery charge function has higher priority than the charge overcurrent detection

function. Consequently, a product in which use of the 0 V battery charge function is enabled

charges a battery forcibly and the charge overcurrent cannot be detected when the battery

voltage is lower than overdischarge detection voltage (VDL).

7. 0 V Battery charge function "unavailable"

This function inhibits recharging when a battery that is internally short-circuited (0 V battery) is connected. When the

battery voltage is the 0 V battery charge inhibition battery voltage (V0INH) or lower, the charging control FET gate is

fixed to the EB

 pin voltage to inhibit charging. When the battery voltage is the 0 V battery charge inhibition battery

voltage (V0INH) or higher, charging can be performed.

Caution Some battery providers do not recommend charging for a completely self-discharged battery.

Please ask the battery provider to determine whether to enable or inhibit the 0 V battery charge

function.

S-8211CDB-M5T1U 数据表(PDF) 23 Page - ABLIC Inc.

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