Starting circuit for switching power supplies

Details Starting circuit for switching power supplies Starting circuit for switching power supplies

2008-01-15

2008-01-15

Laxton, Gary L (Department: 2838)

Electric power conversion systems

Current conversion

With starting arrangement

C363S021080, C363S021160

Reexamination Certificate

active

07319601

ABSTRACT:
A bootstrap circuit for switching power supplies (SMPS), a switching power supply including a bootstrap circuit, and an integrated circuit of a switching power supply, are provided. The bootstrap circuit (13) for switching power supplies includes a first supply voltage (Vin) coming from a first terminal and a second supply voltage (Vcc) coming from a second terminal and a third terminal (30). The bootstrap circuit includes: a first current path between the first terminal and the third terminal (30); a second current path between the first terminal and the second terminal; a third current path between the second terminal and the third terminal (30); and a two-way voltage regulator (M3, Dz2, R5, R6) placed along the second current path.

REFERENCES:
patent: 5359281 (1994-10-01), Barrow et al.
patent: 5459652 (1995-10-01), Faulk
patent: 5841641 (1998-11-01), Faulk
patent: 5909363 (1999-06-01), Yoon
patent: 5973942 (1999-10-01), Nelson et al.

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