AiT Semiconductor Inc.
www.
ait-ic.
com A4057 BATTERY MANAGEMENT LINEAR LI-ION BATTERY CHARGER DESCRIPTION A4057 series is a double lithium battery charge management chip.
The chip includes a charge state detection, the charging process, temperature detection and so on.
The chip also integrates a high-precision reference voltage module in it.
A4057 charge contains three modes: precharge, constant current charging, constant voltage charging.
Constant current charging current is five times the pre-charge current; when the voltage is lower than 6.
5V into the precharge mode; when the voltage is above 6.
5V into the constant current charge mode, the charging current is five times as the precharge,...

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