Dual mode over-current protection for switching mode power...

Details Dual mode over-current protection for switching mode power... Dual mode over-current protection for switching mode power...

2006-10-03

2006-10-03

Vu, Bao Q. (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S021100, C363S021090

Reexamination Certificate

active

07116563

ABSTRACT:
A control circuit for a switched mode power converter is adapted to receive a current sense signal reflecting the output current of the power converter and a feedback signal reflecting the output voltage of the power converter. The control circuit includes a first over-current protection circuit adapted to shut off operation of the switched mode power converter if a sum of the current sense signal and the feedback signal exceed a first predetermined limit, and a second over-current protection circuit adapted to regulate operation of said primary side power switch responsive a comparison of the sum of the current sense signal and the feedback signal to a second predetermined limit. The second predetermined limit is less than the first predetermined limit.

REFERENCES:
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patent: 5726869 (1998-03-01), Yamashita et al.
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patent: 6845018 (2005-01-01), Ohishi
patent: 6961256 (2005-11-01), Yang

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