Switch mode power converter having burst mode with current offset

Patent metadata

Field	Value
Publication number	US-9112425-B2
Application number	US-201313918026-A
Country	US
Kind code	B2
Filing date	Jun 14, 2013
Priority date	Jun 14, 2013
Publication date	Aug 18, 2015
Grant date	Aug 18, 2015

Abstract

A controller for use in a power converter includes a load sensing circuit coupled to output an error signal in response to a feedback signal representative of an output of the power converter. The error signal is representative of a load coupled to an output of the power converter. A burst mode control circuit is coupled to output a burst mode control signal in response to the error signal. An offset current generator circuit is coupled to output an offset current in response to the error signal. A drive circuit is coupled to control switching of a power switch to control a transfer of energy from an input of the power converter to the output of the power converter in response to the error signal, the burst mode control signal, the offset current, and a current sense signal representative of a current through the power switch.

First claim

What is claimed is:

1. A controller for use in a power converter, comprising:
a load sensing circuit coupled to output an error signal in response to a feedback signal representative of an output of the power converter, wherein the error signal is proportional to a load coupled to an output of the power converter;
an offset current generator circuit coupled to output an offset current in response to the error signal;
a drive circuit coupled to control switching of a power swit…

Assignees

• Power Integrations Inc

Inventors

• Prescott Daniel C
• Colbeck Roger

Classifications

• H02M2001/0054

  Electricity · mapped topic

• H02M2001/0035

  Electricity · mapped topic

• H02M2001/0025

  Electricity · mapped topic

• H02M1/4225 Primary

  Electricity · mapped topic

• H02M1/0054

  Electricity · mapped topic