Speedy discharging circuit and power supply apparatus with speedy discharging circuit

Patent metadata

Field	Value
Publication number	US-9831761-B2
Application number	US-201514662680-A
Country	US
Kind code	B2
Filing date	Mar 19, 2015
Priority date	Mar 19, 2015
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

A speedy discharging circuit is applied to a power supply. The speedy discharging circuit is electrically connected to the power supply. The power supply includes a power output side and an output side capacitor. The output side capacitor is electrically connected to the power output side. The speedy discharging circuit includes an energy consuming unit, a switch unit and a switch control unit. The energy consuming unit is electrically connected to the power output side and the output side capacitor. The switch unit is electrically connected to the energy consuming unit. The switch control unit is electrically connected to the switch unit. When the switch control unit receives a sleep signal, the switch control unit turns on the switch unit, so that the output side capacitor discharges to the energy consuming unit.

First claim

What is claimed is:

1. A speedy discharging circuit applied to a power supply, the speedy discharging circuit electrically connected to the power supply, the power supply comprising a power output side and an output side capacitor, the output side capacitor electrically connected to the power output side, the speedy discharging circuit comprising:
an energy consuming unit electrically connected to the power output side and the output side capacitor;
a switch unit electrically connected to the energy consuming unit; and
a switch control unit electrically connected to the switch unit,
wherein when the switch control unit receives a sleep signal, the switch control unit turns on the switch unit, so that the output side capacitor discharges to the energy consuming unit;
wherein the switch control unit comprises:
a charging-discharging subunit electrically connected to the switch unit; and

wherein when the charging-discharging subunit is charged by the sleep signal and the charging-discharging subunit is not fully charged, the switch unit is turned on, so that the output side capacitor discharges to the energy consuming unit.

2. The speedy discharging circuit in claim 1 , wherein the switch control unit further comprises:
a discharging subunit electrically connected to the switch unit and the charging-discharging subunit,
wherein when the switch control unit receives a non-sleep signal, the charging-discharging subunit discharges to the discharging subunit and the switch unit is turned off, so that the output side capacitor does not discharge to the energy consuming unit.

3. The speedy discharging circuit in claim 2 , wherein the discharging subunit comprises:
an energy consuming component electrically connected to the switch unit and the charging-discharging subunit; and
a current unidirectional component electrically connected to the switch unit, the charging-discharging subunit and the energy consuming component.

4. The speedy discharging circuit in claim 3 , wherein the switch control unit further comprises:
a current-limiting subunit electrically connected to the charging-discharging subunit.

5. A power supply apparatus comprising:
a power supply; and
a speedy discharging circuit electrically connected to the power supply,
wherein the power supply comprises:
a power output side; and
an output side capacitor electrically connected to the power output side,
wherein the speedy discharging circuit comprises:
an energy consuming unit electrically connected to the power output side and the output side capacitor;
a switch unit electrically connected to the energy consuming unit; and
a switch control unit electrically connected to the switch unit,
wherein when the switch control unit receives a sleep signal, the switch control unit turns on the switch unit, so that the output side capacitor discharges to the energy consuming unit,
wherein the switch control unit comprises:
a charging-discharging subunit electrically connected to the switch unit, and

wherein when the charging-discharging subunit is charged by the sleep signal and the charging-discharging subunit is not fully charged, the switch unit is turned on, so that the output side capacitor discharges to the energy consuming unit.

6. The power supply apparatus in claim 5 , wherein the switch control unit further comprises:
a discharging subunit electrically connected to the switch unit and the charging-discharging subunit,
wherein when the switch control unit receives a non-sleep signal, the charging-discharging subunit discharges to the discharging subunit and the switch unit is turned off, so that the output side capacitor does not discharge to the energy consuming unit.

7. The power supply apparatus in claim 6 , wherein the discharging subunit comprises:
an energy consuming component electrically connected to the switch unit and the charging-discharging subunit; and
a current unidirectional component electrically connected to the switch unit, the charging-discharging subunit and the energy consuming component.

8. The power supply apparatus in claim 7 , wherein the switch control unit further comprises:
a current-limiting subunit electrically connected to the charging-discharging subunit.

Assignees

• Chicony Power Tech Co Ltd

Inventors

• Meng Hsiang-Chueh
• Huang Yu-Chieh

Classifications

• H02M1/32 Primary

  Means for protecting converters other than automatic disconnection · CPC title

• H02M2001/322

  Electricity · mapped topic

• H02M1/322

  Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock · CPC title