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High-voltage side grid drive circuit resistant to power supply noise interference

A gate drive circuit, power supply noise technology, applied in the direction of reliability improvement and modification, to achieve the effect of simple circuit structure, simple layout implementation form, low layout symmetry and matching

Active Publication Date: 2012-07-25
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the deficiencies in the prior art of anti-common-mode noise interference of the gate drive circuit on the high voltage side, and provides an anti-power supply noise anti-power circuit with simple structure and pure digital circuit Interfering high-voltage side gate drive circuit effectively eliminates common-mode noise and random offset noise interference caused by high-voltage side power supply VB floating

Method used

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  • High-voltage side grid drive circuit resistant to power supply noise interference
  • High-voltage side grid drive circuit resistant to power supply noise interference
  • High-voltage side grid drive circuit resistant to power supply noise interference

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Embodiment Construction

[0021] like figure 1 , figure 2 and image 3 As shown, a high-voltage side gate drive circuit that resists power supply noise interference includes a floating power supply VB-VS, a double pulse generation circuit 1, a high-voltage level shift circuit 2, a noise filter circuit 3, an RS flip-flop 4, and an output driver Circuit 5, in which the double pulse generation circuit 1 converts the low-voltage control signal V in converted into a narrow pulse V on and narrow pulse V off Output to the high-voltage level shift circuit 2, the high-voltage level shift circuit 2 completes the conversion of the low-voltage control signal to the high-voltage control signal, then the signal is filtered by the noise filter circuit 3, and then the narrow pulse signal is restored to The control signal of the high-side gate driving circuit passes through the output driving circuit 5 to increase the driving capability of the control signal, wherein the RS flip-flop 4 is an active-low flip-flop c...

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Abstract

A high-voltage side grid drive circuit resistant to power supply noise interference comprises a floating power supply VB-VS, a dual pulse generating circuit, a high-voltage level shift circuit, a noise filtering circuit including a random detuning noise filtering circuit, an RS (reset-set) trigger and an output drive circuit. A common-mode noise filtering circuit is connected onto the random detuning noise filtering circuit, a first output end and a second output end of the common-mode noise filtering circuit are connected with a first input end and a second input end of the random detuning noise filtering circuit, and the common-mode noise filtering circuit comprises six NAND gates and four inverters and is capable of effectively filtering power supply common-mode noises generated during floating of the high-voltage side power supply VB, so that false triggering of the high-voltage side circuit caused by common-mode noise interference is avoided. The common-mode noise filtering circuit adopting a pure digital circuit and without a passive device is simple in structure, and suitable for application of chips of the high-voltage side grid drive circuit, a half-bridge drive circuit and an intelligent power module and the like.

Description

technical field [0001] The invention relates to the technical field of high-voltage-side gate drive circuits in power electronics technology, in particular to the application of high-voltage-side gate drive circuits, half-bridge drive circuits, and intelligent power modules and other chips. [0002] Background technique [0003] With the development of power electronics technology, high-voltage integrated circuits have significantly improved the integration and stability of the whole machine by integrating low-voltage control circuits, various protection circuits, and high-voltage power devices. Fast, low power consumption and other advantages, has played a very important role in the national economy. The half-bridge driver chip is a high-voltage integrated circuit that adopts advanced floating power supply mode. It is a monolithic integration of high-voltage electronic devices and traditional logic circuits or analog circuits that play a control role. In recent years, it h...

Claims

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Application Information

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IPC IPC(8): H03K19/003
Inventor 钱钦松祝靖刘少鹏王岩孙伟锋陆生礼时龙兴
Owner SOUTHEAST UNIV
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