Patent Number: 8,796,950

Title: Feedback circuit for non-isolated power converter

Abstract: A feedback circuit for a power converter (e.g., a non-isolated converter) is disclosed. The feedback circuit may include a sense circuit coupled to receive an output current of the converter. A sense voltage may be generated across the sense circuit and a voltage-to-current converter may be used to convert the sensed voltage into a feedback signal representative of the output current. The voltage-to-current converter may include a variable shunt regulator, resistor, and transistor. A voltage across the shunt regulator may change in response to a change in voltage across the sense circuit, and the feedback signal may change in response to a change in the voltage across the shunt regulator. A controller may be coupled to receive the feedback signal from the feedback circuit and may control switching of a power switch to regulate the output current based at least in part on the feedback signal.

Inventors: Angeles; Christian P. (San Jose, CA)

Assignee: Power Integrations, Inc.

International Classification: H05B 37/02 (20060101)

Expiration Date: 8/05/12018