US 2015/0318779 A1 · START-UP CIRCUIT AND POWER DEVICE USING THE SAME

Abstract

Disclosed herein are a start-up circuit capable of reducing a leakage current to reduce power consumption, and a power device using the same. The start-up circuit includes: a bias unit connected between a first power source and a second power source and allowing a first current to flow from the first power source to the second power source according to a predetermined voltage; a first start unit connected to the bias unit and driving a second current to apply the predetermined voltage to the bias unit, and stopping driving the second current when a voltage received from the second power source reaches a first voltage; and a second start unit connected to the bias unit and driving a third current, the predetermined voltage being applied to the bias unit by the third current, and stopping driving the third current upon receiving a stop signal.

Claims17

Dependent claims

A start-up circuit, comprising:

a bias unit allowing a first current to flow from a first power source to a second power source according to a predetermined voltage;
a first start unit driving a second current to apply the predetermined voltage to the bias unit, and stopping driving the second current when a voltage received from the second power source reaches a first voltage;
and
a second start unit driving a third current to apply the predetermined voltage to the bias unit, and stopping driving the third current upon receiving a stop signal.

1 more element

A power device, comprising:

a power generating unit generating a predetermined voltage under the control of an integrated circuit (IC) controller;
a start-up circuit supplying the predetermined voltage to the IC controller;
and
a feedback unit supplying a voltage generated by the power generating unit to the start-up circuit to correct the predetermined voltage to enable the power generating unit to stably generate a voltage,
wherein the start-up circuit includes:
a bias unit allowing a first current to flow from a first power source to a second power source according to the predetermined voltage;
a first start unit driving a second current to apply the predetermined voltage to the bias unit, and stopping driving the second current when a voltage received from the second power source reaches a first voltage;
and
a second start unit driving a third current to apply the predetermined voltage to the bias unit, and stopping driving the third current upon receiving a stop signal.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/694,040Filed 23 Apr 2015

Priority

KR 10-2014-005225130 Apr 2014

Published

5 Nov 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

H02M 1/36
Details of apparatus for conversion: means for starting or stopping converters
H02M 3/335
Using devices of a triode or a transistor type requiring continuous application of a control signal: using semiconductor devices only
H02M 3/33507
Using semiconductor devices only: with automatic control of the output voltage or current, e.g. flyback converters
H02M 1/0006
Details of control, feedback or regulation circuits: arrangements for supplying an adequate voltage to the control circuit of converters

Start-up circuit and power device using the same

Life of this patent

Start-up circuit and power device using the same

Life of this patent

Abstract

Claims17