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Overvoltage protection circuit and lamp with overvoltage protection function

An overvoltage protection circuit and technology for protecting circuits, which are applied to emergency protection circuit devices, overvoltage-responsive protection, circuit devices, etc., can solve the problems of complex circuits and high circuit costs, and achieve low circuit costs and simple circuits Effect

Active Publication Date: 2015-03-18
SHENZHEN OCEANS KING LIGHTING ENG CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional overvoltage protection circuit needs to introduce a sampling circuit and an external reference voltage source, the circuit is complex and the circuit cost is high

Method used

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  • Overvoltage protection circuit and lamp with overvoltage protection function
  • Overvoltage protection circuit and lamp with overvoltage protection function
  • Overvoltage protection circuit and lamp with overvoltage protection function

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Embodiment Construction

[0030] 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 creative efforts fall within the protection scope of the present invention.

[0031] Please refer to figure 1 , figure 1 It is a circuit diagram of an overvoltage protection circuit provided by an embodiment of the present invention, including:

[0032] Reference voltage generation circuit 101, reference voltage generation circuit 102, comparison circuit 103 and protection circuit 104, wherein:

[0033] The input terminal of the reference voltage generating circuit 101 is connected to the voltage output terminal V of the preceding stage ci...

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Abstract

The embodiment of the invention discloses an overvoltage protection circuit and a lamp with an overvoltage protection function. The overvoltage protection circuit includes a standard voltage generation circuit, a reference voltage generation circuit, a comparison circuit and a protection circuit; the input end of the reference voltage generation circuit is connected with the output end of the standard voltage generation circuit; the reference voltage generation circuit amplifies standard voltage generated by the standard voltage generation circuit by a preset multiple and outputs the amplified standard voltage from the output end of the reference voltage generation circuit; the comparison circuit compares output voltage of a circuit protected by the overvoltage protection circuit with reference voltage; the output end of the comparison circuit outputs overvoltage protection signals when the output voltage is greater than the reference voltage; and when the driving end of the protection circuit receives the overvoltage protection signals, the first output end and the second output end of the protection circuit are disconnected from each other, so that connection between the output voltage and a load can be disconnected. The overvoltage protection circuit and the lamp with the overvoltage protection function provided by the invention have the advantages of simple circuit structure and low cost.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to an overvoltage protection circuit and a lamp with an overvoltage protection function. Background technique [0002] The traditional overvoltage protection circuit samples the voltage value through the sampling circuit, and the comparator compares the sampling voltage with the external reference voltage, and outputs a corresponding electrical signal when the sampling voltage is greater than the reference voltage (that is, overvoltage occurs) to trigger the protection circuit action . The traditional overvoltage protection circuit needs to introduce a sampling circuit and an external reference voltage source, the circuit is complex and the circuit cost is high. Contents of the invention [0003] The embodiments of the present invention provide an overvoltage protection circuit and a lamp with the overvoltage protection function, the circuit is simple and the cost is low. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/20H02H3/04
Inventor 周明杰杨小军
Owner SHENZHEN OCEANS KING LIGHTING ENG CO LTD
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