Control circuit for current and voltage control in a...

Details Control circuit for current and voltage control in a... Control circuit for current and voltage control in a...

2006-10-18

2009-06-09

Riley, Shawn (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S021130

Reexamination Certificate

active

07545654

ABSTRACT:
A control circuit and method for controlling the output voltage and/or the output current of a switching power supply. The control circuit includes a transformer with a primary-side and a secondary-side main winding and a primary-side switch for switching on and off the primary current through the primary-side main winding in response to a control signal of the control circuit. The control circuit also includes a primary-side auxiliary winding operable to induce a voltage pulse after the primary-side switch is turned off, and a sample and hold device for sampling and storing a level of the voltage pulse for generating a control variable.

REFERENCES:
patent: 5936852 (1999-08-01), Weinmeier et al.
patent: 6459594 (2002-10-01), Tsuji et al.
patent: 6661679 (2003-12-01), Yang et al.
patent: 2004/0032752 (2004-02-01), Kim et al.
patent: 2005/0134200 (2005-06-01), Kawarazaki
patent: 2005/0219870 (2005-10-01), Yang et al.
patent: 2004/082119 (2004-09-01), None

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