Control method and circuit with indirect input voltage...

Details Control method and circuit with indirect input voltage... Control method and circuit with indirect input voltage...

2007-01-12

2009-11-10

Sterrett, Jeffrey L (Department: 2838)

Electric power conversion systems

Current conversion

Including automatic or integral protection means

C363S021010, C363S097000

Reexamination Certificate

active

07616461

ABSTRACT:
The present invention provides a method and a control circuit to detect an input voltage for the control and protections of a power converter. It includes a current sense circuit for generating a current signal in response to a switching current of a transformer. A detection circuit is coupled to sense the current signal for generating a slope signal in response to a slope of the current signal. A protection circuit is further developed to control the switching signal in accordance with the slope signal. The level of the slope signal is corrected to the input voltage of the power converter.

REFERENCES:
patent: 5903452 (1999-05-01), Yang
patent: 6836415 (2004-12-01), Yang et al.
patent: 7259972 (2007-08-01), Yang
patent: 7362592 (2008-04-01), Yang et al.
patent: 7362593 (2008-04-01), Yang et al.
patent: 7468896 (2008-12-01), Gong et al.
patent: 2008/0169802 (2008-07-01), Yang et al.

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