Patent ID: 7262977
Filing Date: 2007-08-28
Classification: H02M,Y02B

Abstract:
1. A switching-mode power supply for DC-to-DC conversion, comprising: (A) DC input means for inputting a DC voltage; (B) DC output means for outputting a DC voltage; (C) inductance means connected between the DC input means and the DC output means; (D) switching means including an active switch connected between the DC input means and the inductance means for switching the DC input voltage on and off; (E) an active switch control circuit connected to the active switch for on/off control thereof; (F) a smoothing capacitor connected between the inductance means and the DC output means; (G) a synchronous rectifier switch connected in parallel with a serial connection of the inductance means and the smoothing capacitor; (H) a rectifying diode connected in parallel with the synchronous rectifier switch; and (I) a synchronous rectifier control circuit connected to the synchronous rectifier switch for on/off control thereof, the synchronous rectifier control circuit comprising: