[LM5072] PoE-PD, 12V RAUX input

Hello~

According to LM5072 datasheet, minimum auxiliary voltage is 9V at RAUX configuration.

But, it's 24V AUX input in the user's guide of POE-PD-POWER-REF (LM5072 5V out 25W IEEE 802.3at Compliant POE+ PD Power Reference Design).

So, my question is as below.

How to use 12V AUX input, instead of 24V, if where we will modify in POE-PD-POWER-REF?

Thanks... C.W. :)