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Alternating current constant current source LED driving circuit

An AC constant current source, LED drive technology, applied in the direction of converting AC power input to DC power output, lamp circuit layout, measuring current/voltage, etc.

Active Publication Date: 2013-12-11
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

No circuit design based on constant current input

Method used

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  • Alternating current constant current source LED driving circuit
  • Alternating current constant current source LED driving circuit

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Embodiment Construction

[0017] An embodiment of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0018] Such as Figure 1 to Figure 2 As shown, the AC constant current source LED driving circuit of this embodiment includes: a switch circuit module 300, a rectification and filtering module 600 connected to the switch circuit module 300 to convert the AC power of the AC constant current source 200 into DC power, and to detect the AC constant current source 200 And a detection module 700 that generates a detection signal according to the detection result, and a control module 500 that is connected to the detection module 700 and receives the detection signal. At the same time, the control module 500 further controls the switch circuit module 300 to connect or disconnect the path between the AC constant current source 200 and the rectification and filtering module 600 according to the detection signal.

[0019] The AC constant current source 200...

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Abstract

The invention relates to an alternating current constant current source LED driving circuit which comprises a switch circuit module, a rectifying and filtering module, a detecting model and a control model, wherein the rectifying and filtering module is connected with the switch circuit module for converting alternating current of an alternating current constant current source into direct current, the detecting module is used for detecting the alternating current constant current source and generating a detecting signal according to a detecting result, and the control module is connected with the detecting module and used for receiving the detecting signal and controlling the switch circuit module to switch on or off the alternating current constant current source and the rectifying and filtering module according to the detecting signal. In the alternating current constant current source LED driving circuit, the control module is used for detecting an input current signal and regulating the magnitude of the input current by controlling the switch circuit module according to the input current signal in order to output constant current; and the rectifying and filtering module is used for converting the input current into the direct current and supplying a direct current constant current source to a load to achieve the purpose of driving a load LED.

Description

【Technical field】 [0001] The invention relates to an LED drive circuit, in particular to an AC constant current source LED drive circuit. 【Background technique】 [0002] The traditional LED driving circuit is generally a constant voltage input, which drives the LED through PWM or linear adjustment. There is no circuit design based on constant current input. How to adjust the constant large AC current to achieve the purpose of driving LED is a problem that needs to be solved. 【Content of invention】 [0003] Based on this, it is necessary to provide an input AC constant current source that can be converted into a DC constant current source suitable for driving LEDs. [0004] An AC constant current source LED drive circuit, comprising: a switch circuit module, a rectification and filtering module connected to the switch circuit module to convert the AC power of the AC constant current source into DC power, detecting the AC constant current source and generating a detection ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H02M7/537G01R19/00
Inventor 周明杰谭威
Owner OCEANS KING LIGHTING SCI&TECH CO LTD