Multi-loop control for quasi-resonant converters
First Claim
1. A multi-loop controller/for controlling a quasi-resonant converter having a power switch, a filter inductor and an output voltage, said controller comprising:
- means for sensing the output voltage of said converter;
means for detecting the filter inductor current;
referencing means for comparing said output voltage with a known reference voltage to develop a control error voltage when said output voltage exceeds said reference voltage;
comparing means for comparing said inductor current with the output of said referencing means and producing a control signal when a predetermination relationship has been detected; and
activating means responsive to said control signal for turning the power switch on.
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Accused Products
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.
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Citations
5 Claims
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1. A multi-loop controller/for controlling a quasi-resonant converter having a power switch, a filter inductor and an output voltage, said controller comprising:
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means for sensing the output voltage of said converter; means for detecting the filter inductor current; referencing means for comparing said output voltage with a known reference voltage to develop a control error voltage when said output voltage exceeds said reference voltage; comparing means for comparing said inductor current with the output of said referencing means and producing a control signal when a predetermination relationship has been detected; and activating means responsive to said control signal for turning the power switch on. - View Dependent Claims (2, 3, 4, 5)
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Specification