Switching power supply apparatus and method of controlling switching power supply apparatus

Patent metadata

Field	Value
Publication number	US-9054591-B2
Application number	US-201213729527-A
Country	US
Kind code	B2
Filing date	Dec 28, 2012
Priority date	Dec 28, 2012
Publication date	Jun 9, 2015
Grant date	Jun 9, 2015

Abstract

A switching power supply apparatus includes a transformer having a primary winding, a secondary winding, and an auxiliary winding, a switching element coupled in series to the primary winding; an output circuit section generating a voltage output from power transferred from the primary winding to the secondary winding in response to a switching operation of the switching element, a feedback signal generation circuit section configured to, during a secondary side conduction period in which an electric current flows through the secondary winding, generate a feedback signal having a signal level corrected based on a length of the secondary side conduction period, from an auxiliary winding voltage induced in the auxiliary winding, and a control circuit section driving the switching element based on the feedback signal.

First claim

What is claimed is:

1. A switching power supply apparatus comprising:
a transformer having a primary winding, a secondary winding, and an auxiliary winding;
a switching element coupled in series to the primary winding;
an output circuit section configured to generate a voltage output from the power transferred from the primary winding to the secondary winding in response to a switching operation of the switching element;
a feedback signal generation circuit section configure…

Assignees

• Sanken Electric Co Ltd

Inventors

• Sugahara Takeki
• Tadamasa Yoshimichi

Classifications

• H02M3/33523 Primary

  Electricity · mapped topic

• H02M1/0032

  Electricity · mapped topic

• Y02B70/10

  Cross-Sectional Technologies · mapped topic