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Surge protection circuit and electronic device using same

A technology for surge protection and circuits, which is applied in the direction of emergency protection circuit devices, circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc. Problems such as high residual voltage at both ends of the module

Active Publication Date: 2017-05-31
SHENZHEN BENCENT ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a surge protection circuit to solve the problem that when the existing protection module is struck by lightning from the negative pole of the power supply to the positive pole of the power supply, the residual voltage at both ends of the module is relatively high, and the current entering the protected circuit is relatively large, which is easy to The problem of damaging the protected circuit

Method used

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  • Surge protection circuit and electronic device using same
  • Surge protection circuit and electronic device using same
  • Surge protection circuit and electronic device using same

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035] It should be noted that, in the drawings or descriptions in the specification, similar or identical features all use the same symbols.

[0036] see figure 2 , The surge protection circuit of some embodiments of the present invention includes: a bidirectional voltage suppressor 202 and a thyristor type surge suppression unit 208, and the bidirectional voltage suppressor 202 and the thyristor type surge suppression unit 208 are connected in parallel. The first terminal 204 of the bidirectional voltage suppressor 202 is connected to the first terminal 210 of the thyristor type surge suppressi...

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Abstract

The invention provides a surge protection circuit. The surge protection circuit comprises a bidirectional voltage suppressor and a thyristor-type surge suppression unit, wherein the thyristor-type surge suppression unit is connected with the bidirectional voltage suppressor in parallel; the first end of the bidirectional voltage suppressor is connected with the first end of the thyristor-type surge suppression unit; the second end of the bidirectional voltage suppressor is connected with the second end of the thyristor-type surge suppression unit; the surge protection circuit is characterized in that the breakover voltage or breakdown voltage in the direction from the first end to the second end of the thyristor-type surge suppression unit is higher than the clamping voltage in the direction from the first end to the second end of the bidirectional voltage suppressor; the breakover voltage in the direction from the second end to the first end of the thyristor-type surge suppression unit is smaller than the clamping voltage in the direction from the second end to the first end of the bidirectional voltage suppressor. The invention further provides an electronic device with the surge protection circuit.

Description

technical field [0001] The invention relates to the field of circuit protection, in particular to a surge protection circuit and an electronic device using the surge protection circuit. Background technique [0002] Electronic devices are often disturbed by overvoltages. Including the overvoltage caused by lightning and the overvoltage of the power supply system. Overvoltages can damage equipment, and protective measures must be taken to reduce overvoltages to acceptable levels. [0003] In order to protect electronic devices, surge protection circuits can be used, figure 1 Shows a kind of existing specific surge protection circuit, in this surge protection circuit, bidirectional TSS (Thyristor Surge Suppressor, thyristor surge suppressor) and unidirectional TVS (Transient Voltage Suppressor, transient voltage suppressor) are connected in series, The bidirectional TSS is connected to the positive pole of the power supply, the negative pole of the unidirectional TVS is con...

Claims

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Application Information

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IPC IPC(8): H02H9/04
CPCH02H9/04H02H9/041H02H3/20H02M1/32
Inventor 蔡锦波陈国源骆生辉李明
Owner SHENZHEN BENCENT ELECTRONICS CO LTD
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