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Surge protection circuit and surge protection device

A surge protection and circuit technology, applied in the field of circuits, can solve the problems of large size of SPD, and achieve the effect of improving reliability and realizing miniaturization design.

Active Publication Date: 2017-03-22
深圳市铁创科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, as the load current increases, the cross-sectional area of ​​the decoupling inductor L used in this solution will increase simultaneously, making the volume of the SPD too large

Method used

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  • Surge protection circuit and surge protection device
  • Surge protection circuit and surge protection device
  • Surge protection circuit and surge protection device

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Embodiment Construction

[0037] 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 only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] The invention provides a surge protection circuit, which solves the inter-level coordination problem of the multi-level discharge link through the surge signal acquisition and processing process while realizing the surge protection, can realize the miniaturization design of the circuit, and improve the circuit reliability. .

[0039] The surge protection circuit, see figure 2 , comprising: an acquisition unit 100, a processing unit 200, a power suppl...

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Abstract

The invention provides a surge protection circuit and a surge protection device. An acquisition unit is used for acquiring a surge signal in a power supply or signal circuit of a protected load, a processing unit is used for generating a trigger signal when the surge signal conforms to a preset protection condition, the trigger signal is loaded onto a first discharging unit so that the first discharging unit can be enabled to appropriately act and discharge a surge on the power supply or signal circuit, and a second discharging unit can be used for clamping the surge on the power supply or signal circuit within a voltage withstood range of the protected load. In the surge protection circuit provided by the scheme, by the acquisition and processing processes, the first discharging unit can be enabled to be appropriately triggered, and the problem of interstage matching between the first discharging unit and the second discharging is solved.

Description

technical field [0001] The invention relates to the technical field of circuits, in particular to a surge protection circuit and a surge protector. Background technique [0002] With the continuous development of technology, electronic devices have become an indispensable part of our daily life. Due to lightning, start-stop or failure of electronic equipment, etc., it will cause instantaneous overvoltage or overcurrent inside the electronic equipment, and then destroy the electronic equipment. Therefore, a surge protector (SPD) is often used to protect electronic equipment at present. [0003] see figure 1 , is a kind of SPD commonly used in the prior art; the SPD includes: varistor MOV, gas discharge tube GDT, decoupling inductor L and diode TVS; The first-level lightning protection component composed of the tube GDT and the varistor MOV is first turned on and absorbs most of the surge signal; the second-level lightning protection component composed of the diode TVS is u...

Claims

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Application Information

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IPC IPC(8): H02H9/06
CPCH02H9/06
Inventor 王俊生万开理程大川杨国华
Owner 深圳市铁创科技发展有限公司