Fly back converter switching power supply device
First Claim
1. In a switching power supply device comprising a DC power source, and a transformer having at least primary and secondary windings, said device further comprises:
- a first switching means which is connected in series with said primary winding, the series circuit being connected to the terminals of said DC power source;
a second switching means;
a capacitor which is connected in series with said second switching means, the series circuit being connected to the terminals of said primary winding;
a rectifying and smoothing circuit of the capacitor input type for rectifying and smoothing a flyback voltage which generates in said secondary winding and for outputting a resulting low DC voltage; and
drive means for detecting the DC output voltage from said rectifying and smoothing circuit and for driving alternately said first and second switching means with predetermined ON-OFF periods to stabilize the DC output voltage.
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Accused Products
Abstract
An improved regenerative control type power supply device having a higher efficiency is disclosed. The power supply device has: a first switching elements which is connected in series with the primary winding of a transformer (this series circuit is connected to the terminals of a DC power source); a second switching element; a capacitor which is connected in series with the second switching means (this series circuit is connected to the primary winding); a rectifying and smoothing circuit for rectifying and smoothing a flyback voltage which generates in the secondary winding and for outputting a resulting DC voltage; and a drive circuit for driving alternately the first and second switching means with predetermined ON-OFF periods.
122 Citations
6 Claims
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1. In a switching power supply device comprising a DC power source, and a transformer having at least primary and secondary windings, said device further comprises:
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a first switching means which is connected in series with said primary winding, the series circuit being connected to the terminals of said DC power source; a second switching means; a capacitor which is connected in series with said second switching means, the series circuit being connected to the terminals of said primary winding; a rectifying and smoothing circuit of the capacitor input type for rectifying and smoothing a flyback voltage which generates in said secondary winding and for outputting a resulting low DC voltage; and drive means for detecting the DC output voltage from said rectifying and smoothing circuit and for driving alternately said first and second switching means with predetermined ON-OFF periods to stabilize the DC output voltage. - View Dependent Claims (2, 3)
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4. In a switching power supply device comprising a DC power source, and a transformer having at least primary and secondary windings, said device further comprises:
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a first switching means which is connected in series with said primary winding, the series circuit being connected to the terminals of said DC power source; a second switching means; a capacitor which is connected in series with said second switching means, the series circuit being connected to the terminals of said primary winding; a rectifying and smoothing circuit of the capacitor input type for rectifying and smoothing a flyback voltage which generates in said secondary winding and for outputting a resulting low DC voltage; a drive means for detecting the DC output voltage from said rectifying and smoothing circuit and for driving alternately said first and second switching means with predetermined ON-OFF periods for stabilizing the low DC output voltage; and at least one resonance capacitor which is connected respectively to the terminals of at least one of said first and second switching means and said primary and secondary windings. - View Dependent Claims (5, 6)
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Specification