Control circuit of power converter having adaptive bias for...

Details Control circuit of power converter having adaptive bias for... Control circuit of power converter having adaptive bias for...

2005-11-28

2009-02-17

Ullah, Akm E (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S021160

Reexamination Certificate

active

07492613

ABSTRACT:
A control circuit for detecting the reflected voltage of a transformer is provided. A detection circuit is developed for sampling the reflected voltage. Because the pulse width of the reflected voltage is narrower at light load, a bias circuit is utilized for producing a bias signal to help the reflected voltage detection. Furthermore, a blanking circuit ensures a minimum pulse width of the reflected voltage.

REFERENCES:
patent: 4302803 (1981-11-01), Shelly
patent: 4868729 (1989-09-01), Suzuki
patent: 6229739 (2001-05-01), Poplevine et al.
patent: 6977824 (2005-12-01), Yang et al.
patent: 2003/0132738 (2003-07-01), Balakrishnan et al.

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