Diodes Incorporated's new AP9214L provides single-chip protection for 1-cell lithium-ion (Li +) and lithium-polymer batteries, and is specifically designed for use in rechargeable Li + battery packs such as batteries in smartphones, cameras, and similar portable electronic devices.
The device is aimed at manufacturers of battery protection modules, and its precise monitoring capabilities provide safe charging and discharging, extending battery life and minimizing energy loss.
The AP9214L encapsulates the Li + protection circuit with a dual N-channel common-drain MOSFET. When an overcharge voltage / current, an overdischarge voltage / current, or a load short circuit is detected, it can be quickly turned off. The stable temperature coefficient characteristic helps to improve the high-precision voltage detection capability of the device, which can be accurately set in various voltage ranges according to the requirements of the final application. The AP9214L also integrates a built-in fixed detection delay time to reduce the number of external components.
AP9214L has low quiescent current, normal mode (typ.) Is 3µA (typ.) At + 25C, and ultra-low RSS (ON) MOSFET with 13.5mohm (typ.), Which has significant energy saving advantages. Power-down mode further reduces quiescent current to less than 0.1µA. The high-voltage CMOS process used to make the device also means that it can withstand voltage surges of up to 30V. The company said that the ultra-thin DFN2535-6 package has a maximum height of 0.6mm, allowing the AP9214L to be used for thin battery protection modules.
