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Lamp power output overvoltage protection circuit and lamp

An overvoltage protection circuit, power output technology, applied in the direction of protection against overvoltage, etc., can solve problems such as poor electromagnetic compatibility of the circuit

Inactive Publication Date: 2013-11-13
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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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 an output overvoltage protection circuit of a lamp power supply, aiming at solving the problem of poor electromagnetic compatibility of the circuit in the existing power supply output overvoltage protection circuit

Method used

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  • Lamp power output overvoltage protection circuit and lamp
  • Lamp power output overvoltage protection circuit and lamp
  • Lamp power output overvoltage protection circuit and lamp

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Embodiment Construction

[0016] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0017] figure 2 The circuit structure of the lamp power supply output overvoltage protection circuit provided by the first embodiment of the present invention is shown. For ease of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:

[0018] A lamp power supply output overvoltage protection circuit 100 is respectively connected to a voltage detection circuit 200, a reference voltage source 300 and a power output control circuit 400. The lamp power supply output overvoltage protection circuit 100 includes:

[0019] Regulator Z1...

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Abstract

The invention is suitable for the field of lighting circuits and particularly relates to a lamp power output overvoltage protection circuit and a lamp. According to the lamp power output overvoltage protection circuit and the lamp, the lamp power output overvoltage protection circuit is respectively connected with a voltage detection circuit and a power output control circuit, the lamp power output overvoltage protection circuit judges whether overvoltage of the power output occurs or not and controls the power output control circuit to control the output of a power supply by receiving a detection signal sent by the voltage detection circuit.

Description

Technical field [0001] The invention belongs to the field of lighting circuits, and particularly relates to a lamp power supply output overvoltage protection circuit and a lamp. Background technique [0002] As a conventional electrical product, lamps are widely used in people's daily life. [0003] The existing power supply output overvoltage protection circuit directly samples the high voltage at the output terminal to feed back to the front end, such as figure 1 As shown, when the output of Uo1 rises, the voltage regulator tube Z1 breaks down and turns on, and the control terminal of the SCR SCR gets the trigger voltage, so the SCR SCR turns on. When Uo2 is short-circuited to ground, the over-current protection or short-circuit protection circuit will start to work and stop the entire power supply circuit. [0004] However, when the existing power supply output overvoltage protection circuit is used for the output protection of the high-voltage output power supply, the electromag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/20
Inventor 周明杰屈煜
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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