Switching power supply circuit capable of reducing switching...

Details Switching power supply circuit capable of reducing switching... Switching power supply circuit capable of reducing switching...

2006-02-21

2006-02-21

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

In shunt with source or load

Using a three or more terminal semiconductive device

C323S284000, C323S290000, C323S235000, C323S259000

Reexamination Certificate

active

07002323

ABSTRACT:
When a switching element (33) changes from ON state into OFF state, a capacitor (35) is charged. The rising of the voltage of the switching element becomes dull relative to the falling of the current flowing in the switching element. When the switching element changes from OFF state into ON state, because a diode (34) has been in ON state, switching of the switching element is zero-voltage switching. When an auxiliary switching element (39) changes from ON state into OFF state, an auxiliary capacitor (41) is charged. The rising of the voltage of the auxiliary switching element becomes dull relative to the failing of the current flowing in the auxiliary switching element. When the auxiliary switching element changes from OFF state into ON state, because an auxiliary diode (40) has been in ON state, switching of the auxiliary switching element is zero-voltage switching. Thus the switching loss is reduced

REFERENCES:
patent: 5066900 (1991-11-01), Bassett
patent: 6518739 (2003-02-01), Wald et al.
patent: 6690143 (2004-02-01), Lin et al.
patent: 2004/0119447 (2004-06-01), Kato
patent: 6-311738 (1994-11-01), None
patent: 7-203673 (1995-08-01), None
patent: 10-500834 (1998-01-01), None
patent: 2002-95243 (2002-03-01), None
patent: 2003-9517 (2003-01-01), None
Japanese Office Action dated Jul. 19, 2005 with English translation of pertinent portions.

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