Multi-period cycle-alternative switching mode power supply control device and its control method

• US 7,224,592 B2
• Filed: 11/10/2004
• Issued: 05/29/2007
• Est. Priority Date: 02/06/2003
• Status: Expired due to Fees

• Current Assignee: Zippy Technology Corporation
• Original Assignee: Zippy Technology Corporation
• Inventors: Chung, Chin-Biau, Wu, Kuang-Ming, Chou, Chin-Wen, Cheng, Ying-Nan
• Primary Examiner(s): STERRETT, JEFFREY L
• Application Number:
  US10/984,940
• Publication Number:
  US 20050062444A1
• Time in Patent Office: 930 Days
• Field of Search: 363/74, 363/78, 363/84, 363/85, 363/86, 363/87, 363/88, 363/89, 363/95, 363/96, 363/97, 363/98
• US Class Current: 363/84
• CPC Class Codes: H02M 3/156 with automatic control of output voltage or current, e.g. switching regulators
• CPC Class Codes: H02M 3/33507 with automatic control of the output voltage or current, e.g. flyback converters H02M3/33561, H02M3/33569 take precedence

Abstract

The present invention relates to a multi-period cycle-alternative switching mode power supply control device and its control method, and the device comprises: a power transfer control unit, a dimming bias control, a burst timing control, and a steering logic; and the method is a power control method that uses a burst timing control to produce an ON_OFF (High_Low) control timing, and after regulated power with a different amplitude is added to the OFF period of the burst period between two ON_OFF periods, two or more mixed periods are used to regulate the timing to a highly reliable and a broad dynamic range. The device of the invention can effectively control certain power transfer components of specific nature and assure that those components and the loading at the rear end can operate more efficiently in a reliable range of a specific nature.

Claims

1. A multi-period cycle-alternative switching mode power supply control device, having a variable multi-period control cycle to effectively control certain power transfer components of specific nature and assure such component and the loading at its rear end can operate more efficiently in a reliable range of specific nature, said device comprising:

a power transfer control, having an input terminal, and said input terminal inputting an error signal, and using the feedback error signal to regulate a duty width and obtain a regulated signal at the output terminal;

a dimming bias control, having one input terminal coupled to an output terminal of said power transfer control, and using a clock signal generated by said power transfer control as a reference source, while using another input end of said dimming bias control to input an electric potential of an error signal and change the timing relation of the clock signal, and obtaining a set of control timing of a standby mode;

a burst timing control, having an input terminal, and said input terminal having a dimming control input signal for comparing with a waveform signal generated by said burst timing control, and obtaining an ON_OFF control timing for selectively selecting a regulated signal outputted by said power transfer component and selecting the control timing of said dimming bias control, and being outputted from an output end of a steering logic control; and

a steering logic control, sending a regulated signal outputted from said power transfer control, a control timing outputted from said dimming bias control, and a timing outputted by said burst timing control in sequence to an ON_OFF signal at an output terminal of said burst timing control and being separated in different timing according to the sequence, and thus controlling an external component and then sending to a component at a loading terminal after being processed through said external component to control the action of the component at the loading terminal.

2. The multi-period cycle-alternative switching mode power supply control device of claim 1, wherein said power transfer control comprises a resistor and a capacitor mutually coupled to constitute a determinant element for setting the working frequency point.

3. The multi-period cycle-alternative switching mode power supply control device of claim 1, wherein said burst timing control is a set of rising trigonometric wave circuit.

4. The multi-period cycle-alternative switching mode power supply control device of claim 1, wherein said component at the loading terminal is a lamp.

5. The multi-period cycle-alternative switching mode power supply control device of claim 1, wherein said component at the loading terminal is a rectification circuit.

6. The multi-period cycle-alternative switching mode power supply control device of claim 1, wherein said external element comprises a soft resonant element and a transfer element.

7. The multi-period cycle-alternative switching mode power supply control device of claim 6, wherein said steering logic control outputs a signal to control the external soft resonant element for an appropriate power waveform transfer, and the power waveform is sent to said transfer element for transferring the signals and then to the element at the loading terminal.

8. The multi-period cycle-alternative switching mode power supply control device of claim 1, wherein said power transfer control having a property of bandpass filter works at the most efficient point, and obtains a voltage waveform of a smaller amplitude through said output soft switching component due to the change of duty width, and obtains a regulation control function due to the change of voltage at the loading terminal.

9. A method for controlling a multi-period cycle-alternative switching mode power supply control device, comprising the steps of:

inputting a total power control regulate signal from an input end of a burst timing control unit; and

using at least two mixed cycles to a produce total power amplitude regulation control method with a high reliability and a wide dynamic range by means of an OFF period (TB) of two ON_OFF burst periods after adding a regulation control power of a different amplitude as to effectively control a power transfer component and assure the negative load of said power transfer component operating effectively in a specific reliable range.

10. The method for controlling a multi-period cycle-alternative switching mode power supply control device of claim 9, wherein said total power amplitude regulation control signal has a percentage within a specific width range, and said percentage ranges from 10% to 100%.

11. The method for controlling a multi-period cycle-alternative switching mode power supply control device of claim 9, wherein said control signal within said ON-OFF period adopts a fixed frequency and a regulated duty width.

12. The method for controlling a multi-period cycle-alternative switching mode power supply control device of claim 9, wherein said control signal within said ON-OFF period adopts a regulated frequency and a fixed duty width.

13. The method for controlling a multi-period cycle-alternative switching mode power supply control device of claim 9, wherein said control signal within said ON-OFF period adopts a regulated frequency and a regulated duty width.

14. The method for controlling a multi-period cycle-alternative switching mode power supply control device of claim 9, wherein said OFF period (TB) further comprises a stop zone (TC) with a zero power strength.

15. The method for controlling a multi-period cycle-alternative switching mode power supply control device of claim 14, wherein said OFF period further comprises a slow rising zone and a slow dropping zone between a start zone and an end zone for improving the transition period of said power strength to prevent an excessively large burst rate of said power strength.

16. The method for controlling a multi-period cycle-alternative switching mode power supply control device of claim 9, wherein said OFF period further comprises a slow rising zone and a slow dropping zone between a start zone and an end zone for improving the transition period of a power strength EA/EB of said ON_OFF period to prevent an excessively large burst rate of said power strength EA/EB.