Circuit & System Protection


Protection for single-cell Li-ion batteries

31 August 2020 Circuit & System Protection

The AP9221 is a single-package protection solution specially designed for single-cell Li+ rechargeable batteries in portable and wearable equipment. Made by Diodes Incorporated, it provides rich battery protection features such as over-charge voltage/current, over-discharge voltage/current, and load short circuit.

The device has a built-in fixed delay time to minimise false triggering without the need of external timing components. Highly accurate detection circuits complement the internal MOSFET RSS(ON) performance to ensure extremely high overcharge/discharge current limit accuracy at both room and full temperature.

The AP9221 is available in the U-DFN2030-6 (Type C) package.


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