Light-emitting diode (LED) over current protection circuit and light fitting

A technology for protecting circuits and overcurrent, applied to overcurrent protection, emergency protection circuit devices, electrical components, etc., can solve the problems of complex structure and high cost of overcurrent protection circuits, and achieve simple structure and low cost Effect

Active Publication Date: 2015-02-04
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide an LED overcurrent protection circuit, which aims to solve the problems of complex structure and high cost in the current LED overcurrent protection circuit

Method used

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  • Light-emitting diode (LED) over current protection circuit and light fitting
  • Light-emitting diode (LED) over current protection circuit and light fitting

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Embodiment Construction

[0011] 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.

[0012] figure 1 The circuit structure of the LED overcurrent protection circuit provided by the first embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows.

[0013] LED overcurrent protection circuit, used to connect LED load D1, LED overcurrent protection circuit includes:

[0014] Filter capacitor C1, voltage regulator chip U1, comparison unit 400, current limiting resistor R1, voltage divider resistor R2, voltage divider resistor R3, voltage divider resistor R...

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Abstract

The invention is suitable for the field of protection circuits, and particularly relates to a light-emitting diode (LED) over current protection circuit and a light fitting. In the embodiment of the invention, the LED over current protection circuit consists of discrete components, and when an LED has over current, a power supply output voltage can be cut off to fulfill the aim of over current protection; and the LED over current protection circuit is simple in structure and low in cost.

Description

technical field [0001] The invention belongs to the field of protection circuits, in particular to an LED overcurrent protection circuit and a lamp. Background technique [0002] As a new light source, LED has the characteristics of energy saving, environmental protection and high efficiency. The technology has matured and is applied in various fields. LED is widely used as a lighting source. LED is a current-type light-emitting device, which is very sensitive to the current flowing through itself, and the requirements are relatively strict. Therefore, in order to ensure the stable and reliable operation of the LED, it is necessary to add over-current protection to the LED drive circuit. Protection to prevent excessive current from damaging the LED. Most of the existing protection circuits to prevent LED overcurrent are controlled by sampling the voltage and outputting it through a single-chip microcomputer. Although the single-chip microcomputer control has the advantages ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/00H02H3/08
Inventor 周明杰孙占民
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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