Abstract: In a power converter having a power train that includes a power switch and a rectifier for conducting forward currents from the power switch, a circuit for, and method of, moderating a peak reverse recovery current of the rectifier and a power converter employing the circuit or the method. The circuit includes: (1) a snubber circuit coupled to the rectifier and including a snubber inductor, a snubber capacitor and an auxiliary diode, the snubber inductor reducing the peak reverse recovery current of the rectifier and the snubber capacitor recovering energy stored in the snubber inductor and (2) an auxiliary switch, coupled in parallel with the power switch, that is activated when the power switch is transitioned from a conducting state to a non-conducting state to charge the snubber capacitor.

Abstract: A DC power supply device which includes a housing, an AC plug moved in and out of the housing and adapted to obtain AC power supply from a city power supply outlet, a DC plug moved in and out of the housing and adapted to obtain DC power supply from a socket for cigarette lighter of a car, a circuit board mounted inside the housing and adapted to process AC power supply obtained from the AC plug or DC power supply obtained from the DC plug into desired-DC power supply, and a DC output connector connected to the circuit board for DC output.