QX1820, introduced by Qunxin Microelectronics, is a single-chip solution of synchronous boost designed for mobile power supply. The synchronous boost chip integrates a linear charge management module, a synchronous discharge management module, a power detection and LED indication module, and a protection module. QX1820 has built-in charge and discharge power MOS, the charging current is fixed at 0.8A, and the synchronous boost supports 1A output current. QX1820 integrates multiple safety protection functions such as temperature compensation, overtemperature protection, overcharge and overdischarge protection, output overvoltage protection, output overload protection, output short circuit protection, etc. to ensure the safety of chips and lithium-ion batteries. The application circuit is simple, and charging management and discharge tube can be realized with few components.

QX1820   

1A synchronous mobile power supply scheme characteristic

Discharge output: 5V/1A

Charging current: 0.8A

1a Output discharge efficiency is as high as 93% Bat discharge termination voltage: 2.85V

Optional 4.2V/4.35V charging voltage

Intelligent temperature control and over-temperature protection

Integrated output overvoltage protection, short-circuit protection and overload protection Integrated overcharge and overdischarge protection Support trickle mode and zero-voltage charging Support flashlight output

Package form: SOP8

app; application

Mobile power supply