We have a DC/DC supply product designed at least 5 years ago, using UC2842AD8. This IC is PWM control for a 48Vdc to 40Vdc 10A converter. Currently, we need modify this product to take 35-84Vac 60Hz input and output 42Vdc 13Amp. Would like to know if any new IC could replace the UC2842AD8 to provide low material and assembly cost and high efficiency. Do not know if LM5116 could be used. The annual usage could be 10K. Please advice. Thanks,