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求助,电池管理芯片方案

Other Parts Discussed in Thread: BQ40Z50, BQ25606

我们在设计一种电子设备,里面有锂电池(单节,3.7v普通锂电池)。能有边冲边放的功能。但用户插上USB电源时,对电池进行充放电。检测电池电量的功能。USB断开或者没电时,切换到锂电池供电。切换时要无缝切换,不能有重启或者电压跌落的情况。整个板子功耗大概在1.5A左右。求芯片方案