SLVAF59 April   2021 TPS2372 , TPS2373 , TPS23730 , TPS23731 , TPS23734 , TPS2375 , TPS2375-1 , TPS23750 , TPS23751 , TPS23752 , TPS23753A , TPS23754 , TPS23754-1 , TPS23755 , TPS23756 , TPS23757 , TPS23758 , TPS2376 , TPS2376-H , TPS2377 , TPS2377-1 , TPS23770 , TPS2378 , TPS2379

 

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4 Adapter Power

Everything needed to know about adapters is included in Advanced Adapter ORing Solutions using the TPS23753. Although, a specific IC is mentioned, this document is true for all of TI PoE PD IC’s. Good adapters have EMI filters, input cap filters, they connect to APD and have properly rated diodes. If APD is not used, the APD must be pulled to RTN; otherwise the design does not work.

GUID-20210422-CA0I-XQKH-MWL3-BFTPRJTNSJGW-low.pngFigure 4-1 Adapter Input

Another solution to use an adapter with adapter priority is to disrupt the detection resistance. This is Figure 10 in Advanced Adapter ORing Solutions using the TPS23753. Please note that the resistor divider needs to be the appropriate power size. Note the power rating, component sizes and values.