Circuit for output voltage error detect and feedback in SMPS

Details Circuit for output voltage error detect and feedback in SMPS Circuit for output voltage error detect and feedback in SMPS

2011-08-09

2011-08-09

Han, Jessica (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S021160

Reexamination Certificate

active

07995361

ABSTRACT:
The present invention relates to an error information detection circuit and an error feedback circuit, which detect the error of an output voltage from a voltage induced to a winding. The circuit for detecting error information of an output voltage of a transformer from voltage induced to the feedback winding of the transformer and feeding back the error information includes a flyback period detection circuit (34) for detecting a flyback period from a voltage induced to the feedback winding. A comparison unit (35) compares the induced voltage of the feedback winding with a reference voltage and outputs a result of comparison. A logic unit (36) outputs error information of an output voltage of the transformer according to a flyback period detection output of the flyback period detection circuit and the output of the comparison unit. An up/down control unit (32) outputs a feedback value corresponding to the error information.

REFERENCES:
patent: 5818703 (1998-10-01), Jacobson
patent: 6385061 (2002-05-01), Turchi et al.
patent: 6728117 (2004-04-01), Schemmann et al.
patent: 6836415 (2004-12-01), Yang et al.
patent: 6894911 (2005-05-01), Telefus et al.
patent: 7336508 (2008-02-01), Nakamura
patent: 7522431 (2009-04-01), Huynh et al.
patent: 2010/0110734 (2010-05-01), Park
patent: 10-2006-0100041 (2006-09-01), None
International Search Report for International Application No. PCT/KR2007/005164.

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