Switching power supply circuit

Details Switching power supply circuit Switching power supply circuit

2005-01-04

2005-01-04

Sherry, Michael (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S021040, C363S097000

Reexamination Certificate

active

06839245

ABSTRACT:
A switching power supply circuit ready for worldwide use is disclosed which suppresses a variation of a pulse voltage to be fed back when the alternating-current input varies. The switching power supply circuit includes a composite resonance type converter of a switching frequency control scheme wherein a voltage resonance pulse voltage generated in a primary side voltage resonance converter is fed back to a rectification diode through a high speed diode and an inductance or a transformer. An active clamp circuit is provided on the primary side to clamp the voltage resonance pulse voltage.

REFERENCES:
patent: 4736283 (1988-04-01), Yasumura
patent: 5430633 (1995-07-01), Smith
patent: 5880943 (1999-03-01), Yokoyama
patent: 6366476 (2002-04-01), Yasumura
patent: 6396717 (2002-05-01), Yasumura
patent: 6466463 (2002-10-01), Morita
patent: 6496389 (2002-12-01), Yasumura
patent: 0 404 191 (1990-12-01), None

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