PRISEMI芯导一级代理分销经销通路供应商KOYUELEC光与电子PSC2965

PSC2965

Rev.1.1 1 www.prisemi.com

1. Description

PSC2965 combines a highly integrated switch-mode charger, to minimize single-cell Lithium-ion (Li-ion)

charging time from a USB power source, and a boost regulator to power a USB peripheral from the battery.

Its low impedance power path optimizes switch-mode operation efficiency, reduces battery charge time and

3.55V minimum system voltage (programmable). With this feature, the system keeps operating even when

the battery is completely depleted or removed. When the input source current or voltage limit is reached, the

power path management automatically reduces the charge current to zero and then starts discharges the

battery until the system power requirement is met. This supplement mode operation keeps the input source

from getting overloaded.

The device initiates and completes a charging cycle when host control is not available. It automatically

charges the battery in three phases: pre-conditioning, constant current, and constant voltage. In the end, the

charger automatically terminates when the charge current is below a preset limit in the constant voltage

phase. Later on, when the battery voltage falls below the recharge threshold, the charger automatically starts

another charging cycle.