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想做一款18650锂电池充放电管理，求推荐芯片及电路。

jungle jungle:
Prodigy 40 points
Other Parts Discussed in Thread: BQ25600, BQ24250C, BQ24095

外部电源存在时，给电池充电，同时，外部电源给设备供电，当外部电源撤离时，由锂电池供电，当锂电池降到一定的电量时，自动断开输出。

该设计类似手机充放电管理电路。

求推荐芯片和电路，谢谢。