It is designed for use in rechargeable Li battery packs, in portable equipment such as smartphones and cameras. Its accurate monitoring capability delivers safe charging and discharging, prolonging cell lifetime and minimising energy losses, says the company.

The device packages a Li protection circuit with a dual N-channel, common-drain MOSFET that can be rapidly turned off when over-charge voltage or current, over-discharge voltage or current, or load short-circuit conditions are detected. A stable temperature-co-efficient characteristic contributes to the voltage-detection capability, which can be set within voltage ranges as required by the end-application. There is also an integrated fixed detection delay time to reduce external component count.

Quiescent current is low, 3.0µA at 25°C in normal mode (typical), and the MOSFET has a low RSS (ON) of 13.5mΩ (typical, for power saving. A power-down mode further cuts the quiescent current to below 0.1µA. The high-voltage CMOS process used enables the device to endure voltage surges up to 30V.

The AP9214L is available in a DFN2535-6 package, with a maximum height of 0.6mm.