FLYBACK SWITCHING POWER SUPPLY AND SELF-POWERED CIRCUIT AND METHOD THEREFOR

Title:

FLYBACK SWITCHING POWER SUPPLY AND SELF-POWERED CIRCUIT AND METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2024/087624

Kind Code:

A1

Abstract:

The present application relates to a flyback switching power supply and a self-powered circuit and method therefor. The self-powered circuit comprises: a charging capacitor used for taking power from a primary side coil and supplying power to a switching power supply chip; a voltage-withstanding switch tube used for acquiring a power supply voltage of the primary side coil and outputting a charging voltage for charging the charging capacitor; a charging switch tube used for controlling whether to charge the charging capacitor; an adjusting control tube used for limiting the charging voltage of the charging capacitor; a voltage limiting control unit used for controlling the conduction state of the adjusting control tube according to the charging voltage; a charging control unit preset with a charging requirement and used for outputting a conduction switch signal for controlling the adjustment control tube to be switched on or off; and an inverter used for acquiring the conduction switch signal and controlling the voltage limiting control unit or the charging control unit to be connected to the adjusting control tube according to the conduction switch signal.

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WO/2002/039567	MAGNETIC AMPLIFIER AC/DC CONVERTER WITH PRIMARY SIDE REGULATION

Inventors:

LIN XINCHUN (CN)
ZHENG LINGBO (CN)
WANG FULONG (CN)
ZHANG JIE (CN)

Application Number:

PCT/CN2023/097189

Publication Date:

May 02, 2024

Filing Date:

May 30, 2023

Export Citation:

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Assignee:

LII SEMICONDUCTOR CO LTD (CN)

International Classes:

H02M3/335; H02M1/08; H02M1/32

Foreign References:

CN115498891A	2022-12-20
CN106059279A	2016-10-26
CN114050711A	2022-02-15
JP2015008599A	2015-01-15

Other References:

熊权洪等 (XIONG, QUANHONG ET AL.): "基于PWM控制器NCP1200的多路开关电源设计 (Non-official translation: Multi-channel Switching Power Supply Design Based on PWM Controller NCP1200)", 电子元器件应用 (ELECTRONIC COMPONENT & DEVICE APPLICATIONS), vol. 09, no. 07, 31 July 2007 (2007-07-31), pages 21 - 23

Attorney, Agent or Firm:

BEIJING WEIZHENG PATENT AGENCY CO., LTD. (CN)

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