Switched mode power supply has diode bridge, series choke/main MOSFET in parallel with bridge output connections, series MOSFET circuit, flyback converter transformer, smoothing stage

摘要

The device has a diode bridge (1) connected to an alternating source, a choke (13) and main MOSFET (2) in series and in parallel with the bridge's output connections, an auxiliary MOSFET (3) connected to form a series MOSFET circuit, a flyback converter transformer (16) primary connected between an arrangement of capacitors (9,10) and the MOSFET junction and a secondary in parallel with a smoothing circuit (15,11).