System and method for calculating the output power of a flyback converter
AssigneeSemiconductor Components Industries, LLC
InventorsDhruv Chopra, Armando Gabriel Mesa, John D. Stone
Life of this patent
Estimating the term…
Abstract
A power detector is disclosed. The power detector includes a primary-side sense circuit configured to generate a sense signal representative of an output voltage of a flyback converter. The power detector also includes a primary-side reference generator configured to generate a reference signal representative of an average output current of the flyback converter. The power detector further includes a primary-side power calculation circuit configured to generate an output-power signal in response to the sense signal and the reference signal.
Claims20
A power detector, comprising:
- a primary-side sense circuit configured to generate a current representative of an output voltage of a flyback converter;
- a primary-side reference generator configured to produce a reference signal representative of an average output current of the flyback converter, wherein the reference signal is produced by the primary-side reference generator based on a demagnetization signal that corresponds to a demagnetization time of a secondary winding of a transformer of the flyback converter;
- and
- a primary-side power calculation circuit configured to generate an output-power signal in response to the sense signal and the reference signal.
A power converter controller, comprising:
- a flyback control circuit configured to control a switch of a flyback converter;
- and
- a power detector comprising:
- a primary-side sense circuit configured to generate a sense signal representative of an output voltage of the flyback converter;
- a primary-side reference generator configured to generate a reference signal representative of an average output current of the flyback converter, wherein the reference signal is produced by the primary-side reference generator based on a demagnetization signal that corresponds to a demagnetization time of a secondary winding of a transformer of the flyback converter;
- and
- a primary-side power calculation circuit configured to generate an output-power signal in response to the sense signal and the reference signal.
A method, comprising:
- generating a sense signal representative of an output voltage of a flyback converter;
- generating a reference signal representative of an average output current of the flyback converter based on a demagnetization signal that corresponds to a demagnetization time of a secondary winding of a transformer of the flyback converter;
- and
- generating an output-power signal in response to the sense signal and the reference signal;
- and
- wherein each of the sense signal, the reference signal, and the output-power signal is generated on a primary side of the flyback converter.
Dependencies are inferred from the claim text.