Switching power supply circuit

Details Switching power supply circuit Switching power supply circuit

2006-08-22

2006-08-22

Riley, Shawn (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S025000

Reexamination Certificate

active

07095629

ABSTRACT:
A switching power supply circuit in which, in order to both provide high power conversion efficiency of a complex resonant converter having a synchronous rectifier circuit and reduce a circuit scale and cost by simplifying the circuit, a synchronous rectifier circuit of a winding voltage detection system is provided on a secondary side of the complex resonant converter, a coupling coefficient is decreased to about 0.8 by setting a gap length in an isolated converter transformer to about 1.5 mm, and numbers of turns of a primary winding and secondary windings are set such that a level of a voltage induced per turn (T) of the secondary windings is 2 V/T. Thus, since magnetic flux density at a core of the isolated converter transformer is decreased to a certain value or lower, a secondary side rectified current can be in a continuous mode even under a condition of heavy load.

REFERENCES:
patent: 5274543 (1993-12-01), Loftus, Jr.
patent: 5999417 (1999-12-01), Schlecht
patent: 11-332233 (1999-11-01), None
patent: 2002-095248 (2002-03-01), None
patent: 2002-218748 (2002-08-01), None
patent: 2002-262568 (2002-09-01), None

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