PMP8678, High Voltage Input (184Vac to 707Vac) to 12V at 1A, 3.3V at 100mA Non-isolated Flyback Reference Design

PMP8678, High Voltage Input (184Vac to 707Vac) to 12V at 1A, 3.3V at 100mA Non-isolated Flyback Reference Design. The UCC28720 is a quasi resonant controller and is specialized to drive high voltage BJTs. When the drain voltage is higher than 1KV, BJTs are the best choice for low to mid power flyback converters. In this case two voltages are supplied of 12V at 1A and 3.3V at 100mA