Power supply device and image forming apparatus having the same

Patent metadata

Field	Value
Publication number	US-8941262-B2
Application number	US-201113193021-A
Country	US
Kind code	B2
Filing date	Jul 28, 2011
Priority date	Jul 30, 2010
Publication date	Jan 27, 2015
Grant date	Jan 27, 2015

Abstract

A power supply device having a first load operating with a first voltage in a normal operation mode, a second load operating with a second voltage lower than the first voltage in the normal operation mode, and a third load operating with the second voltage in the normal operation mode and a power-saving mode. An auxiliary second-voltage generating circuit configured to, when a main supply voltage is supplied from a main power supply circuit and a primary second-voltage generating circuit does not generate the second voltage with a third-load electric path for carrying therethrough the main supply voltage from the main power supply circuit to the third load without passing through the primary second-voltage generating circuit being broken by a switching circuit, generate the second voltage from the main supply.

First claim

What is claimed is:

1. A power supply device configured to operate in one of a normal operation mode and a power-saving mode, comprising:
a first load configured to operate with a first voltage supplied thereto in the normal operation mode;
a second load configured to operate with a second voltage supplied thereto in the normal operation mode, the second voltage being lower than the first voltage;
a third load configured to operate with the second voltage supplied thereto in b…

Assignees

• Arimoto Hideki
• Brother Ind Ltd

Inventors

• Arimoto Hideki

Classifications

• H02J9/005 Primary

  Electricity · mapped topic

• G06F1/3296

  Physics · mapped topic

• H02J1/108

  Electricity · mapped topic

• Y02B60/1267

  Cross-Sectional Technologies · mapped topic

• G06F1/3284

  Physics · mapped topic