Switching power supply unit

Details Switching power supply unit Switching power supply unit

2008-10-27

2009-11-24

Riley, Shawn (Department: 2838)

Electric power conversion systems

Current conversion

Including automatic or integral protection means

Reexamination Certificate

active

07623362

ABSTRACT:
A switching power supply unit is provided, in which circuit efficiency can be effectively improved compared with a usual case. Secondary windings of a transformer are configured of two sheet metals. Rectifier diodes in a rectifier circuit are connected between the two sheet metals. Inductance of a line between the rectifier elements and the secondary windings is reduced compared with the usual case where rectifier elements are connected between secondary windings and a wiring area, and consequently surge voltage to the rectifier elements is effectively suppressed. A plurality of diode chips configuring the rectifier diodes are preferably disposed at equal spaces along a winding direction of each of the sheet metals.

REFERENCES:
patent: 4449174 (1984-05-01), Ziesse
patent: A-2002-165453 (2002-06-01), None

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