# US 8,542,001 B2 · Power circuit for reducing standby power consumption

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- Number: US 8,542,001 B2
- Document ID: US8542001B2
- Status: Granted
- Kind: B2
- Application number: 12/815,970
- Filed: 2010-06-15
- Published: 2011-12-15
- Granted: 2013-09-24
- Earliest claimed: 2010-06-15
- Assignees: Zippy Technology Corp.
- Applicants: Tsun-Te Shih; Yu-Yuan Chang; Yi-Hua Wang; Heng-Chia Chang
- Inventors: Tsun-Te Shih; Yu-Yuan Chang; Yi-Hua Wang; Heng-Chia Chang
- Web page: https://patentgrep.com/patent/US8542001B2

## CPC

- H02J 9/005: {using a power saving mode (for copiers G03G15/5004)}
- Y02B 70/30: Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y04S 20/20: End-user application control systems
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y04S: SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS

## Abstract

In a power circuit for reducing standby power consumption, a power supply is defined to include a primary power system and a stationary power system. The stationary power system outputs a stationary power after obtaining an input power. A control unit controls ON/OFF of the primary power system, obtains the stationary power as the required power, and receives a PS ON/OFF signal for triggering the control unit, so that the control unit controls the primary power system to supply a primary output power. The power supply includes a switch unit having two ends connected to a power circuit for outputting the stationary power and a virtual load respectively. The PS ON/OFF signal is provided for controlling the switch unit. If the switch unit does not receive the PS ON/OFF signal, it is OFF in a standby mode to avoid unnecessary power consumption of the virtual load.

## Claims

### Claim 1

A power supply for reducing standby power consumption, comprising:
a primary power system;
a stationary power system, the stationary power system outputting a stationary power for the power supply in a standby mode;
a control unit obtaining the stationary power and being triggered by a power supply (PS) ON/OFF signal to drive the primary power system to output a primary output power,
a switch unit including two ends, a first end being connected to the stationary power system for outputting the stationary power and a second end connected to a virtual load, the virtual load including two ends, with a first end connected to the switch unit and a second end connected to a ground point;
wherein the PS ON/OFF signal is provided for controlling the ON/OFF of the switch unit, such that the switch unit is turned off in the standby mode when not triggered by the PS ON/OFF signal, and the switch unit is turned on when triggered by the PS ON/OFF signal and then the stationary power system is electrically connected to the virtual load.

### Claim 2 (depends on 1)

The power circuit for reducing standby power consumption as recited in claim 1, wherein the virtual load is a resistive load.

### Claim 3 (depends on 2)

The power circuit for reducing standby power consumption as recited in claim 2, wherein the virtual load includes a plurality of resistors connected in parallel.

### Claim 4 (depends on 1)

The power circuit for reducing standby power consumption as recited in claim 1, wherein the switch unit is a metal oxide semiconductor field effect transistor (MOSFET).