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有没有一款双电源切换的芯片?



1.有一个设备需要双路供电热插拔保证可靠。(两块锂电池或者1电池+1适配器)
2.适配器电压DC15V,锂电池电压DC12~16.8V。
3.两块电池都插上时,一块供电至电压低于12V时自动切换到另一块电池继续供电;
4.任意一路接上适配器时需要切换到适配器端供电。
5.适配器插头和电池插头物理上一样不做区分;但电池有电量的信号线。
有没有合适的芯片可以实现此功能呢?