AP9221

Document number: DS42177 Rev. 3 - 2

9 of 16

www.diodes.com

May 2021

© Diodes Incorporated

AP9221

Application Information (continued)

6. 0V Battery Charging Function (Option)

This function is available as an option and can be factory set internally. AP9221 has this function built-in.

0V charging function permits the charger to recharge the battery when its voltage is 0V due to self-discharge. If the 0V charging function is not

present, the device will prevent the charger from recharging the battery when its voltage is 0V due to self-discharge.

(If a device without 0V charging function is needed, please contact the Diodes Incorporated sales team.)

7. Overvoltage Charger Detection Circuit

This function is used to monitor the charger voltage between the VDD pin and VM pin. When this voltage exceeds overvoltage charger detection

voltage (8.0V Typ.), the AP9221 will turn off the charging MOSFET. When this voltage drops below overvoltage charger release voltage (7.3V

Typ.), it then turns on the charging MOSFET. There are no delay times set for the detection and release.

8. Power-Down Mode or Auto-Wake-Up Function Option

In a device with a power-down function, the device enters the overdischarge status during power-down mode. The IC enters sleep mode and the

current consumption becomes very low, typically 0.1µA. To release from power-down status to the normal status, charger connection is required.

In a device with auto-wakeup mode, the IC remains active in the overdischarge state. The IC is released into the normal state by any operation

that increases the battery voltage more than the overdischarge release voltage.