Method and apparatus for high-side input winding regulation
First Claim
1. A controller for use in a power converter, comprising:
- a control circuit coupled to control switching of a power switch coupled between a positive input supply rail of the power converter and an energy transfer element input of the power converter;
a sampling circuit coupled to the control circuit and coupled to receive a signal across the energy transfer element input of the power converter during an off time of the power switch to provide a sampled output of the converter, wherein the sampled output of the power converter is disabled from being resampled by the sampling circuit during an on time of the power switch; and
a switch conduction scheduling circuit included in the control circuit and coupled to the sampling circuit such that the control circuit is coupled to switch the power switch in response to the sampled output of the power converter.
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Abstract
A controller for use in a power converter includes a control circuit coupled to control switching of a power switch coupled between a positive input supply rail of the power converter and an energy transfer element input of the power converter. A sampling circuit is coupled to the control circuit and is coupled to receive a signal across the energy transfer element input during an off time of the power switch to provide a sampled output of the converter. The sampled output of the power converter is disabled from being resampled by the sampling circuit during an on time of the power switch. A switch conduction scheduling circuit is included in the control circuit and is coupled to the sampling circuit such that the control circuit is coupled to switch the power switch in response to the sampled output of the power converter.
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Citations
11 Claims
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1. A controller for use in a power converter, comprising:
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a control circuit coupled to control switching of a power switch coupled between a positive input supply rail of the power converter and an energy transfer element input of the power converter; a sampling circuit coupled to the control circuit and coupled to receive a signal across the energy transfer element input of the power converter during an off time of the power switch to provide a sampled output of the converter, wherein the sampled output of the power converter is disabled from being resampled by the sampling circuit during an on time of the power switch; and a switch conduction scheduling circuit included in the control circuit and coupled to the sampling circuit such that the control circuit is coupled to switch the power switch in response to the sampled output of the power converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification