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Driving circuit, control circuit and device for driving switching device

A technology for driving circuits and driving switches, which is applied in the field of circuits, and can solve the problems of limiting the application range of non-destructive driving technology and the inability to realize MOS tube driving, etc.

Active Publication Date: 2016-12-07
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are some disadvantages in the existing lossless drive technology, for example, only the common source MOS tube can be driven, so it is impossible to drive two MOS tubes on the same bridge arm, which limits the application range of the lossless drive technology

Method used

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  • Driving circuit, control circuit and device for driving switching device
  • Driving circuit, control circuit and device for driving switching device
  • Driving circuit, control circuit and device for driving switching device

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Embodiment Construction

[0091] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0092] In order to facilitate the understanding of the embodiments of the present invention, several related concepts are first introduced here:

[0093] 1) Switching Mode Power Supply (Switching Mode Power Supply), also known as switching power supply or switching converter, is a high-frequency power conversion device. Its function is to convert a level of voltage into the voltage or current required by the user through different forms of architecture...

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PUM

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Abstract

An embodiment of the invention provides a driving circuit for driving switching devices, a control circuit and a device. The driving circuit comprises a first branch used for driving a first main switching device, a second branch used for driving a second main switching device, a first auxiliary switching device and a second auxiliary switching device, wherein the first branch comprises a primary side of a transformer, the second branch comprises a secondary side of the transformer, and the first auxiliary switching device and the second auxiliary switching device are used for controlling voltage difference between the first end and the second end of the first branch. By the driving circuit, the control circuit and the device, isolation drive of the main switching devices can be realized, and the application range of the lossless drive technology can be effectively enlarged.

Description

technical field [0001] Embodiments of the present invention relate to the field of circuits, and more particularly, to a driving circuit, a control circuit and a device for driving a switching device. Background technique [0002] Switching Mode Power Supply (Switching Mode Power Supply) is a power supply that uses modern power electronics technology to control the time ratio of switching devices on and off to maintain a stable output voltage. It can also be called switching power supply or switching converter. High-frequency power conversion device. Wherein, the switching device is generally a Metal-Oxide-Semiconductor Field-Effect Transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, referred to as “MOSFET”), which may be referred to as a MOS transistor for short. [0003] The driving loss of the MOS tube P=1 / 2*Cgs*U*fs, where Cgs is the gate-source capacitance of the MOS tube, U is the driving voltage of the MOS tube, and fs is the frequency of turning on and of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/088
CPCH02M1/088
Inventor 杨向东陈庆彬杨和钱
Owner HUAWEI TECH CO LTD