I am designing a 300W car amplifier using TAS5630B. To power the chip I am stepping up the 12V input to 40V DC using push-pull topology. My controller chip is SG3525 and I am using a PC40 material T28X16X16 size torroidal transformer.
For SG3525, I choose Rt= 22K, Ct= 1nF and Rd= 56 Ohms...