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A surge suppression circuit with input anti-reverse connection function

A technology of surge suppression circuit and suppression circuit, applied in the direction of output power conversion device, electrical components, etc., can solve the problems of poor reliability and power supply compatibility, DC-DC converter damage, etc., to achieve reliable performance and simple circuit principle Effect

Active Publication Date: 2017-11-28
ECU ELECTRONICS INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the currently used surge suppression circuit has poor reliability and power compatibility, which may easily cause damage to the DC-DC converter.

Method used

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  • A surge suppression circuit with input anti-reverse connection function
  • A surge suppression circuit with input anti-reverse connection function
  • A surge suppression circuit with input anti-reverse connection function

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing:

[0020] Such as figure 1 As shown, the surge suppression circuit with input reverse connection prevention function in this embodiment includes an input surge voltage suppression circuit 1, an input reverse connection prevention and its startup surge current suppression circuit 2, and an EMI filter circuit 3. The input terminal of the surge voltage suppression module 1 is connected to the voltage source through the current protection circuit, and its output terminal is connected to the input terminal of the EMI filter circuit 3 through the input anti-reverse connection and the power-on surge current suppression circuit 2, and the EMI filter circuit 3 The output end is connected to the DC / DC converter through the input capacitor C, and the input anti-reverse connection and startup surge current suppression circuit 2 supplies power to it through the DC / DC auxiliary power supply...

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Abstract

The invention relates to a surge suppression circuit with input reverse connection prevention function, which includes an input surge voltage suppression circuit, an input reverse connection prevention and its startup surge current suppression circuit, and an EMI filter circuit. The input surge voltage suppression circuit The input terminal is connected to the voltage source through the current protection circuit, and its output terminal is connected to the input terminal of the EMI filter circuit through the input anti-reverse connection and its startup surge current suppression circuit, and the output terminal of the EMI filter circuit is connected to the input capacitor C and The DC / DC converter is connected, and the input anti-reverse connection and its power-on surge current suppression circuit are powered by the DC / DC auxiliary power supply. The circuit principle of the invention is simple and the performance is reliable, not only can realize the electromagnetic compatibility performance of the power supply, prevent the DC-DC converter circuit from being damaged due to the reverse connection of the input polarity, but also realize the protection when the input current is overcurrent through the fuse F.

Description

technical field [0001] The invention relates to the technical field of switching power supply circuits, in particular to a surge suppression circuit with an input anti-reverse connection function. Background technique [0002] The current standard brick DC-DC converter modules have been widely used in fields such as military industry, communication, medical treatment, railway locomotive and industrial production. Moreover, the various functions of the standard brick DC-DC converter module are relatively complete, such as external voltage regulation, current sharing, switch control, various protection functions and working status indication. However, due to the volume and size limitations of standard brick DC-DC converter modules, many functions, such as input surge voltage or current suppression, input anti-reverse function and input EMI filtering, etc., cannot be integrated into the module internal. Therefore, in order to meet the application requirements, the standard br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32H02M1/44
Inventor 赵艳飞
Owner ECU ELECTRONICS INDAL
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