US 2013/0155741 A1 · POWER SUPPLY DEVICE AND ELECTRIC POWER CONVERSION DEVICE USING THE SAME

Abstract

A comparator compares a voltage of a node into which electric current flows from a system of a first voltage and a reference voltage for maintaining the node at a second voltage. A step-up-type DC-DC converter receives the voltage of the node which is input to the comparator, increases the voltage to a voltage higher than the first voltage, and applies the voltage to the system of the first voltage. According to the comparison of the comparator, when the voltage of the node is higher than the reference voltage, the step-up-type DC-DC converter activates a step-up function, and when the voltage of the node is equal to or less than the reference voltage, the step-up-type DC-DC converter deactivates the step-up function.

Claims9

Dependent claims

A power supply device comprising:

a comparator for comparing a voltage of a node to which an electric current from a system of a first voltage flows and a reference voltage for maintaining the node at a second voltage;
and
a step-up-type DC-DC converter for receiving a voltage of the node which is input into the comparator, and increasing the voltage to a voltage higher than the first voltage to apply the voltage to the system of the first voltage, wherein
the step-up-type DC-DC converter activates a step-up function when, as a result of comparison made by the comparator, the voltage of the node is higher than the reference voltage, and the step-up-type DC-DC converter deactivates the step-up function when the voltage of the node is equal to or less than the reference voltage.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

13/770,821Filed 19 Feb 2013

Priority

JP 2010-19120027 Aug 2010

Published

20 Jun 2013

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

H02M 7/483
Using discharge tubes with control electrode or semiconductor devices with control electrode: converters with outputs that each can have more than…
H02M 3/156
Using semiconductor devices only: with automatic control of output voltage or current, e.g. switching regulators
H02M 7/5387
Using semiconductor devices only, e.g. single switched pulse inverters: in a bridge configuration
H02M
Apparatus for conversion between ac and ac, between ac and dc, or

Power supply device and electric power conversion device using the same

Life of this patent

Power supply device and electric power conversion device using the same

Life of this patent

Abstract

Claims9