LED direct-current input control circuit

A control circuit, DC input technology, applied in electric light circuit layout, electric light source, conversion equipment without intermediate conversion to AC, etc. It can solve the problems of narrow input voltage range and insufficient protection function, and achieve the effect of preventing damage.

Inactive Publication Date: 2010-05-19
OCEANS KING LIGHTING SCI&TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a DC input LED control circuit for the defe

Method used

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[0017] 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.

[0018] figure 1 It is a structural schematic diagram of a DC input LED control circuit in a preferred embodiment of the present invention. like figure 1 As shown, the control circuit in the embodiment of the present invention mainly includes an input detection circuit 100 , a boost circuit 200 , a step-down circuit 300 and a feedback circuit 400 .

[0019] The input detection circuit 100 is used for detecting the input DC signal. When it is detected that the input DC signal is within a predetermined range, the DC signal is output to the boost circuit 200; the boost circuit 200 is connected with ...

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Abstract

The invention relates to an LED direct-current input control circuit which comprises an input detecting circuit, a voltage increasing circuit and a voltage decreasing circuit which are connected in sequence and also comprises a feedback circuit. The voltage increasing circuit and the voltage decreasing circuit are used for increasing and decreasing the voltage of an inputted direct-current signaland outputting the voltage to supply power to an LED lamp, and the feedback circuit is connected with the voltage decreasing circuit and is used for controlling the constant voltage and the constant current of an output signal. After detecting that the inputted direct-current signal has overvoltage, the input detecting circuit outputs a first overvoltage shutting-off signal to the voltage increasing circuit so as to directly output the inputted direct-current signal to the voltage decreasing circuit to decrease the voltage and supply power to the LED lamp, and after detecting that the inputted direct-current signal has undervoltage, the input detecting circuit outputs an undervoltage shutting-off signal to the voltage increasing circuit and the voltage decreasing circuit so as to shut offthe voltage increasing circuit and the voltage decreasing circuit and carry out undervoltage protection to the voltage increasing circuit and the voltage decreasing circuit. The LED direct-current input control circuit can realize the direct-current input of low voltage and wide range and has the input undervoltage and overvoltage function, the constant current outputting function and the output overvoltage protection function.

Description

technical field [0001] The present invention relates to an LED control circuit, more specifically, to an LED direct current input control circuit. Background technique [0002] At present, the power supply system used by locomotive lights in coal mines needs to supply power to multiple loads, resulting in a very large voltage change. On the other hand, the locomotive lights used in the coal mining industry to transport coal mines mainly have the following disadvantages: input voltage range is too narrow, light source life is short, light efficiency is low, vibration resistance is poor, maintenance cycle is short, and protection functions are insufficient. It can be used underground for a long time. And, existing locomotive light is often extinguished because of line fault occurring abnormally during use, may cause serious safety accident like this. [0003] Therefore, the locomotive lamp needs to further improve its performance. Contents of the invention [0004] The te...

Claims

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Application Information

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IPC IPC(8): H05B37/02H02M3/10H02H3/24
Inventor 周明杰陈永伦肖磊
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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