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Isolated overvoltage protection circuit and lamp

An overvoltage protection circuit and isolation technology, which is applied in the direction of protection against overvoltage, can solve problems such as endangering user safety and circuit load damage, and achieve the effect of protecting circuits and loads and ensuring personal safety

Active Publication Date: 2014-12-17
OCEANKING DONGGUAN LIGHTING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Overvoltage protection is a crucial part of the power supply circuit. If there is no overvoltage protection, both the circuit and the load may face damage caused by overvoltage.
And some overvoltage protection circuits are not isolated from the power supply, which may endanger the safety of users

Method used

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  • Isolated overvoltage protection circuit and lamp

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Embodiment Construction

[0015] In order to further illustrate the principle and structure of the present invention, preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0016] see figure 1 , the isolated overvoltage protection circuit of the present invention, which includes: a feedback unit 1 , a comparison unit 2 and a circuit breaker control unit 3 .

[0017] The feedback unit 1 is used to detect whether the voltage in the circuit exceeds a set value, and includes an input terminal and an output terminal. The input terminal of the feedback unit 1 is connected to the first power supply. The comparison unit 2 includes a first input terminal, a second input terminal and an output terminal. The first input terminal of the comparison unit 2 is connected to the output terminal of the feedback unit 1, and the second input terminal of the comparison unit 2 is connected to the second power supply. The disconnection control unit 3 is ...

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Abstract

The invention proposes an isolated overvoltage protection circuit. The isolated overvoltage protection circuit comprises a feedback unit, a comparison unit and an open circuit control unit, wherein the feedback unit is used for detecting whether the voltage in the circuit is beyond a set value or not; a first input end of the comparison unit is connected with an output end of the feedback unit, and a second input end of the comparison unit is connected with a second power supply; the open circuit control unit is used for controlling the on / off of the circuit and a load, a first input end of the open circuit control unit is connected with a first power supply, a second input end of the open circuit control unit is connected with the second power supply, a third input end of the open circuit control unit is connected with an output end of the comparison unit, a first output end of the open circuit control unit is connected with the first input end of the comparison unit, and a second output end of the open circuit control unit is connected with the load; and when the feedback unit detects that the voltage of the circuit is beyond a voltage value, the comparison unit controls the open circuit control unit to cut off the connection of the circuit and the load. The invention also proposes a lamp. With the adoption of the isolated overvoltage protection circuit, overvoltage protection can be achieved, and personal safety of a user is also guaranteed.

Description

technical field [0001] The invention relates to a protection circuit, in particular to an isolated overvoltage protection circuit and a lamp. Background technique [0002] Overvoltage protection is a crucial part of the power supply circuit. If there is no overvoltage protection, both the circuit and the load may face damage caused by overvoltage. And some overvoltage protection circuits are not isolated from the power supply, which may endanger the safety of users. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies in the prior art, and propose an isolated overvoltage protection circuit and a lamp, which can perform overvoltage protection and ensure the personal safety of users. [0004] In order to solve the above technical problems, the present invention proposes an isolated overvoltage protection circuit, which includes: a feedback unit, which is used to detect whether the volt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/20
Inventor 周明杰林锦旭
Owner OCEANKING DONGGUAN LIGHTING TECH
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