Multi-loop control for quasi-resonant converters

Details Multi-loop control for quasi-resonant converters Multi-loop control for quasi-resonant converters

1988-04-11

1989-09-12

Beha, Jr., William H.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323290, 363 21, H02M 3156

Patent

active

048663670

ABSTRACT:
A multi-loop controller for controlling a quasi-resonant converter having a power switch, a filter inductor and an output voltage. The controller includes a sensor circuit for sensing the output voltage of the converter. A detector monitors the filter inductor current of the converter. The output voltage is compared with a known reference voltage to develop a control error voltage when the output voltage exceeds the reference voltage. A comparing circuit then compares the inductor current with the control error voltage and produces a control signal when a predetermination relationship has been detected. Finally, an activating circuit responsive to the control signal turns the power switch on.

REFERENCES:
patent: 3663949 (1972-05-01), Froeschle
patent: 4013939 (1977-03-01), Biess
patent: 4258308 (1981-03-01), Weischedel
patent: 4694240 (1987-09-01), Grunsch
patent: 4709316 (1987-11-01), Ngo

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