Switching tube driving circuit and switching tube driving method

A driving circuit and switching tube technology, applied in the field of power electronics, can solve the problems of large switching loss and EMI interference, and achieve the effect of reducing switching loss and EMI interference

Active Publication Date: 2017-12-08
JOULWATT TECH INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a switch tube driving circuit and its driving method, which are used to solve the technical problems of large EMI interference and large switching loss in the prior art

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  • Switching tube driving circuit and switching tube driving method
  • Switching tube driving circuit and switching tube driving method
  • Switching tube driving circuit and switching tube driving method

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Embodiment Construction

[0031] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and arrangements made within the spirit and scope of the present invention.

[0032] In order to give the public a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0033] The invention is described in more detail by way of example in the following paragraphs with reference to the accompanying drawings. It should be noted that the accompanying drawings are all in a relatively simplified form and in an inaccurate scale, and are only used to facilitate and clearly assist in explaining t...

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Abstract

The invention discloses a switching tube driving circuit and a switching tube driving method. The switching tube driving circuit has two circuit structures. The first circuit structure receives a sampling signal that characterizes the drain voltage of the switching tube, and can obtain a drain voltage signal change rate based on the sampling signal. The drain voltage signal change rate controls switching tube driving current. The second circuit structure receives a sampling signal that characterizes the drain voltage or the gate voltage of the switching tube, and compares the time when the sampling signal reaches a reference signal with threshold time to regulate the switching tube driving current. The switching tube driving circuit can adjust the signal change rate of the drain voltage or the gate voltage and achieve high regulation accuracy.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a switching tube driving circuit and a driving method thereof. Background technique [0002] In the switching power supply, the gate drive speed of the switching tube affects the working performance of the switching power supply. If the driving speed of the switching tube is too fast (that is, the driving current is too large), the switching tube is prone to EMI interference; if the driving speed of the switching tube is too slow (that is, the driving current is too small), the switching speed of the switching tube will be slowed down, and the switching delay will change. large, thereby increasing switching losses. [0003] figure 1 A switch tube driving circuit in the prior art is illustrated, including a switch tube M and a resistor R, the resistor R is connected to the gate of the switch tube M, and the input drive signal DRV controls the switch tube M to be on and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/08
CPCH02M1/08H02M1/0029H02M1/0054Y02B70/10
Inventor 查振旭黄必亮任远程周逊伟
Owner JOULWATT TECH INC LTD
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