Modularized power supply switch control structure

• US 7,939,964 B2
• Filed: 08/02/2007
• Issued: 05/10/2011
• Est. Priority Date: 08/02/2007
• Status: Active Grant

• Current Assignee: Zippy Technology Corporation
• Original Assignee: Zippy Technology Corporation
• Inventors: Chen, Yu-Cheng
• Primary Examiner(s): Fureman; Jared J
• Assistant Examiner(s): Amrany; Adi
• Application Number:
  US11/882,538
• Publication Number:
  US 20090033151A1
• Time in Patent Office: 1,377 Days
• Field of Search: 307/11, 307/30, 307/31, 307 38- 41, 307/42
• US Class Current: 307/41
• CPC Class Codes: H02M 1/008 Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
• CPC Class Codes: H02M 1/009 having two or more independently controlled outputs for DC-DC converter with intermediate AC H02M3/33561
• CPC Class Codes: H02M 1/36 Means for starting or stopping converters

Abstract

A modularized power supply switch control structure aims to control a main power system of a power supply. The main power system includes at least one high voltage output unit at a high voltage output end and one low voltage output unit at a rear low voltage output end. A control unit is connected to the high voltage output unit and the low voltage output unit to control start/stop time series of the high voltage output unit and the low voltage output unit so that the high voltage output unit and the low voltage output unit can be started asynchronously. Thus the power supply can output a start voltage at the start instant to meet load requirement. A plurality of power output modules deliver output asynchronously. Hence output current or voltage surge at the start instant can be improved.

Claims

1. A power supply equipped with a modularized power supply switch control structure, the power supply being connected with an AC power input source to obtain an input power, the power supply comprising:

a standby power system supplying power to start a pulse width modulation which generates a duty cycle signal;

a power factor correction circuit receiving the duty cycle signal, regulating a phase of the input power, and producing an output;

a main power system receiving the output of the power factor correction and including a high voltage output unit and a low voltage output unit, the high voltage output unit delivering high voltage DC power through a high voltage output end, and the low voltage output unit delivering low voltage DC power through a low voltage output end; and

a control unit connecting to the high voltage output unit and the low voltage output unit and receiving the duty cycle signal of the pulse width modulation to order the start time of the high voltage output unit and the low voltage output unit to start asynchronously, with one of the output units having a deferred start time and the other output unit having a non-deferred start time while staying on together, until a power requirement is reached, so as to avoid surge voltages at a start instant of the power source.

2. The power supply of claim 1, wherein the high voltage output unit includes a first power output module.

3. The power supply of claim 1, wherein the high voltage output unit includes a plurality of first power output modules coupled in parallel.

4. The power supply of claim 3, wherein the control unit is connected to at least two parallel first power output modules and controls start/stop of each first power output module and generates start/stop time series to allow the first power output modules to start or stop at different times while staying on together, until a power requirement is reached, so as to avoid surge voltages.

5. The power supply of claim 3, wherein the first power output modules have different rated output power.

6. The power supply of claim 1, wherein the low voltage output unit includes a second power output module.

7. The power supply of claim 1, wherein the low voltage output unit includes a plurality of second power output modules coupled in parallel.

8. The power supply of claim 7, wherein the control unit is connected to at least two parallel second power output modules and controls start/stop of each second power output module and generates start/stop time series to allow the second power output modules to start or stop at different times while staying on together, until a power requirement is reached, so as to avoid surge voltages.

9. The power supply of claim 7, wherein the second power output modules have different rated output power.

10. The power supply of claim 1, wherein the low voltage output unit is connected to at least one DC/DC converter.