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BQ25756: 请问BQ25756支持电源切换吗?

Part Number: BQ25756

我需要实现:主电源为24V,电池为3节磷酸铁锂电池。主电源24V有时,给电池降压充电,并给系统供电; 当主电源24V没有时,9.6V电池升压到24V继续给系统供电.