Simulation of first power good signal to generate second power good signal by power enabling control circuit for uninterrupted power supplies

• US 8,924,745 B2
• Filed: 04/11/2012
• Issued: 12/30/2014
• Est. Priority Date: 04/11/2012
• Status: Expired due to Fees

• Current Assignee: Zippy Technology Corporation
• Original Assignee: Zippy Technology Corporation
• Inventors: Shih, Tsun-Te, Chang, Yu-Yuan, Shih, Kuang-Lung, Hsiao, Po-Wen
• Primary Examiner(s): Cao, Chun
• Assistant Examiner(s): HTAY, LIN LIN M
• Application Number:
  US13/444,457
• Publication Number:
  US 20130275777A1
• Time in Patent Office: 993 Days
• US Class Current: 713/300
• CPC Class Codes: G06F 1/30 Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations for resetting only G06F1/24

Abstract

A power enabling circuit for uninterrupted power supplies includes a main power supply system, a backup power supply system and a power enabling control circuit. The main power supply system is electrically connected to an external power source to convert and output a conversion power, and generates a first power good signal when the conversion power is output normally. The backup power supply system outputs a backup power when the main power supply system cannot output the conversion power. The power enabling control circuit receives the first power good signal output from the main power supply system and simulates to generate a corresponding second power good signal, and also includes a normal power supply state in which the second power good signal is sent to a motherboard and a backup power supply state to receive the backup power and continuously output the second power good signal to the motherboard.

Claims

1. A power enabling circuit for uninterrupted power supplies, comprising:

a main power supply system which is electrically connected to an external power source to convert and output a conversion power and generates a first power good signal when the conversion power is output normally;

a backup power supply system which is coupled in parallel with the main power supply system and includes at least one energy storage module to store a backup power which is output from the backup power supply system when the main power supply system is unable to output the conversion power; and

a power enabling control circuit which is electrically connected to the main power supply system and the backup power supply system to receive the first power good signal output from the main power supply system and simulate to generate a corresponding second power good signal, and includes a normal power supply state for sending the second power good signal to a motherboard and a backup power supply state to receive the backup power output from the backup power supply system and continuously send the second power good signal to the motherboard.

2. The power enabling circuit of claim 1, wherein the motherboard outputs a power supply-on signal to the main power supply system and the power enabling control circuit.

3. The power enabling circuit of claim 2, wherein the main power supply system receives the power supply-on signal and delays for a first set duration to output the first power good signal.

4. The power enabling circuit of claim 2, wherein the power enabling control circuit receives the power supply-on signal and delays for a second set duration to output the second power good signal.

5. The power enabling circuit of claim 1, wherein the backup power supply system includes a charge unit to receive the conversion power and charge the conversion power into the energy storage module.

6. The power enabling circuit of claim 1, wherein the power enabling control circuit includes an OFF state in which no power supply-on signal is received from the motherboard.

7. The power enabling circuit of claim 1, wherein the power enabling control circuit synchronously modulates waveform of the second power good signal according to the first power good signal.

8. The power enabling circuit of claim 1, wherein the main power supply system includes a rectification filter unit connected to the external power source, a power factor correction unit connected to the rectification filter unit, a transformer, a pulse width control unit, a switch element and a rectification output unit.

9. The power enabling circuit of claim 1, wherein the conversion power of the main power supply system is DC power.

10. The power enabling circuit of claim 1, wherein the energy storage module is a rechargeable battery.