Patent Number: 6,297,622

Title: Power supply circuit with minimized power consumption

Abstract: A power supply circuit is provided which converts an input voltage into an output voltage and outputs the output voltage. The power supply circuit has resistive elements, switches, and capacitors. The resistive elements cause a fraction of the output voltage to develop. The switches are turned on or off in order to enable or disable flow of a current through the resistive elements. When the switches as well as a switch are turned on, the capacitors hold the voltage, which is the fraction of the output voltage developed due to the resistive elements. A control circuit controls the switch so that the voltage will be equal to a reference voltage. Even during a period during which the switches are off, the voltage nearly corresponds with the voltage developed during a period during which the switches are on.

Inventors: Yatabe; Satoshi (Shiojiri, JP)

Assignee: Seiko Epson Corporation

International Classification: H02M 3/04 (20060101); H02M 3/156 (20060101); G05F 001/613 ()

Expiration Date: 10/02/2018