Is TDA7498E okay to work with DC 12V power supply?


If I want to use TDA7498E on a car, and the car is DC 12V power supply, can it work?
jameswill
Power output is totally dependent on supply voltage.
Yes.
To answer OP's question, a DC to DC step up converter is required if use on a car battery.

It should be possible. The TD manual I bought said that it supports 12V to 32V DC. I currently use a 24V charger to supply power, but although it is a ksz8794cnxcc power amplifier board, the process and configuration may be different.