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Buck type switching power supply converter controlled by digital sliding mode variable structure

A sliding mode variable structure, switching power supply technology, applied in output power conversion devices, control/regulation systems, conversion of DC power input to DC power output, etc., can solve the problem of increased monitoring circuit complexity, complex monitoring circuits, power consumption , area and other issues

Inactive Publication Date: 2013-04-03
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the method of analog control is used to realize this function, a complex monitoring circuit is required
As the complexity of the monitoring circuit increases, the cost of power consumption and area will also increase.

Method used

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  • Buck type switching power supply converter controlled by digital sliding mode variable structure
  • Buck type switching power supply converter controlled by digital sliding mode variable structure
  • Buck type switching power supply converter controlled by digital sliding mode variable structure

Examples

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Embodiment Construction

[0040] The embodiment of the digital sliding mode variable structure control will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0041] refer to figure 1 , the Buck switching power converter using digital sliding mode variable structure controller includes two parts: digital Buck conversion module 2 and digital sliding mode variable structure controller 1 .

[0042] Buck type conversion module 2 is like conventional circuit, has control terminal, power supply voltage V out output and feedback voltage V fed output, etc.

[0043] The digital sliding mode variable structure controller 1 includes a first voltage-frequency conversion module 11, a second voltage-frequency conversion module 12, a frequency difference module 13, a voltage comparison module 14, a state monitoring module 15, and a state contr...

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Abstract

The invention relates to a Buck type switching power supply converter controlled by a digital sliding mode variable structure. The Buck type switching power supply converter controlled by the digital sliding mode variable structure comprises a Buck type conversion module which is provided with a control end, a voltage Vout output end, a feedback voltage Vfed output end and a digital sliding mode variable structure controller, wherein the first input end REF is connected with a reference voltage, and the second input end FED and output end OUT are respectively connected with the feedback voltage Vfed output end and control end of the conversion module. The controller converts the feedback voltages provided by the reference voltage and the conversion module into a reference clock signal and a feedback clock signal. An operational state signal of the conversion module is analyzed and tested according to the two voltage signals and two clock signals, so as to stabilize the output voltage of the Buck conversion module by the control method of the digital sliding mode variable structure. The Buck type switching power supply converter provided by the invention is strong in monitoring and management capabilities and high in conversion efficiency, and has the advantages of quick load transient response and good robustness.

Description

technical field [0001] The invention belongs to the technical field of power electronics application, in particular to a Buck switching power converter adopting digital sliding mode variable structure control, which is used in a power supply system requiring strong stability and quick response to load transient changes. Background technique [0002] In today's society, people greatly enjoy the convenience brought by information technology, and stable DC power supplies are required in information technology fields such as portable electronic products, Light Emitting Diode (LED) lighting, and automotive electronics. DC regulated power supplies are mainly divided into linear regulators, charge pumps and switching power converters. Linear regulators, such as low dropout regulators (Low Dropout Regulator, LDO), provide a small load current, and the conversion efficiency is also low; the load current provided by the charge pump is also general; the switching power supply has a str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155
Inventor 徐冠南贾晨王自强郑旭强张春姜汉钧陈虹王志华
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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