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我想找下TI有没有和Linear的LTC4040类似功能的芯片？
你要的功能是“有外部电源时外部电源给系统供电同时给电池充电，没有外部电源时电池给系统供电”吗？
要看你接的VSYS电压要多少，如果VSYS电压在3.5~4.35V之间的话那用BQ2419X系列charger IC即可实现。
