Switching power supply device

Details Switching power supply device Switching power supply device

1994-10-18

1997-07-01

Wong, Peter S.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 97, 363131, H02M 3335

Patent

active

056444796

ABSTRACT:
A switching power supply device which includes a series circuit constituted by a first switching element which is connected to an input voltage and which is at least repeatedly turned on and off and a second switching element which is repeatedly turned on and off alternating with the first switching element. A first capacitor is connected to one end of the second switching element. A transformer having a primary winding is connected to the second switching element and the first capacitor. A series circuit constituted by a second capacitor and a rectifier diode is connected across the secondary winding of the transformer, and a series circuit constituted by an inductance element and a smoothing capacitor is connected across the rectifier diode. A control circuit controls the turning on and off of the first and second switching elements based on the voltage across the smoothing capacitor. The voltage across the smoothing capacitor is supplied as the output.

REFERENCES:
patent: 4857822 (1989-08-01), Tabisz et al.
patent: 5490052 (1996-02-01), Yoshida et al.

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