Power supply controller with an input voltage compensation circuit
AssigneePower Integrations, Inc.
InventorsZhao-Jun Wang, Giao M. Pham
Life of this patent
Estimating the term…
Abstract
An example controller for a power supply includes a drive signal generator and a compensation circuit. The drive signal generator is to be coupled to control switching of a switch included in the power supply to regulate an output voltage of the power supply in response to a sensed output voltage such that the output voltage of the power supply is greater than an input voltage of the power supply. The compensation circuit is coupled to the drive signal generator and is also coupled to output an offset current to adjust the sensed output voltage in response to the input voltage of the power supply.
Claims9
A controller for a power supply, the controller comprising:
- a drive signal generator to be coupled to provide a drive signal to control switching of a switch included in the power supply to regulate an output voltage of the power supply in response to a sensed output voltage such that the output voltage of the power supply is greater than an input voltage of the power supply;
- and
- a compensation circuit coupled to the drive signal generator and coupled to output an offset current having one of a plurality of constant non-zero values, each of the plurality of constant non-zero values corresponding with the input voltage of the power supply reaching a respective input threshold, wherein the plurality of constant non-zero values decrease as the respective input thresholds increase.
A power supply, comprising:
- a feedback circuit coupled to provide a sensed output voltage representative of an output voltage of the power supply;
- a controller coupled to the feedback circuit, the controller including:
- a drive signal generator coupled to control switching of a switch included in the power supply to regulate the output voltage of the power supply in response to the sensed output voltage such that the output voltage of the power supply is greater than an input voltage of the power supply;
- and
- a compensation circuit coupled to the drive signal generator and coupled to output an offset current having one of a plurality of constant non-zero values, each of the plurality of constant non-zero values corresponding with the input voltage of the power supply reaching a respective input threshold, wherein the plurality of constant non-zero values decrease as the respective input thresholds increase.
Dependencies are inferred from the claim text.