| 摘要 |
PURPOSE: A high efficiency power conversion circuit is provided to reduce switching loss of power switch by a zero voltage switching of a primary side power switch of a transformer. CONSTITUTION: A high efficiency power conversion circuit comprises an inverter unit(103) having first and second input terminals and first and second output terminals, wherein the inverter unit converts the voltages applied to the first and second input terminals into AC type voltages and outputs the converted voltages to the first and second output terminals in accordance with the applied switching signal; a transformer unit(106) having first and second input terminals and first and second output terminals, wherein the transformer transforms voltages output from the inverter applied to the first and second input terminals, and outputs the voltages to the first and second output terminals; a rectifier unit(109) having first and second input terminals and first and second output terminals, wherein the rectifier rectifies output voltage of the transformer unit applied to the first and second input terminals, rectifies current output from the transformer unit into direct current, and outputs the current to the first and second output terminals; and a smoothing capacitor(112) for filtering and outputting current output from the rectifier unit. |
