TPS23751: the customer use TPS23751 in AT-type2, is it also can be backward compatible AT-type1 ?

Part Number:TPS23751

Hi Sir 

The customer PD side power consumption max is 10W.

They are no sure if they can use in AF PSE?AF37V-57V,because AF voltage is 37V-57V,and AT is42V-57V.

the customer use TPS23751 in AT-type2, is it also can be backward compatible AT-type1 ?

                                                      Bogey