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Driving circuit capable of selecting LED output current by jacks

A technology of outputting current and driving circuit, applied in electric light sources, electrical components, electroluminescent light sources, etc., can solve the problems of inability to adjust current, single output current of LED driver, affecting the dimming range of LED driver, etc. range effect

Active Publication Date: 2017-12-01
盐城莱廷绍工业技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, the output current of the traditional LED driver is single, and the only definite output current is obtained by adjusting the resistance value of the sampling resistor of the dimming chip, and the output current cannot be effectively adjusted according to the real-time demand. Meet the needs of different lamps and lanterns, affect the use of LED drivers and dimming range

Method used

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  • Driving circuit capable of selecting LED output current by jacks

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Embodiment Construction

[0014] Such as figure 1 As shown, a driving circuit for selecting the LED output current through a socket, including an input power supply, an EMI circuit, a rectifying circuit and a control output regulating circuit connected in sequence, and the rectifying circuit is a bridge rectifying circuit. The control output adjustment circuit includes a dimming driver chip, the dimming driver chip is connected with a MOS transistor Q1 and a sampling resistor R6, one end of the MOS transistor Q1 is grounded, and a resistor R3 is connected between the ground terminals of the MOS transistor Q1. The output terminal of the MOS transistor Q1 and the output terminal of the rectifier circuit are jointly connected with several output terminals. The output end of the tube Q1 is connected to a transformer to make the current more stable. A resistor R1 is set between the terminal 3 and the rectifier circuit, a resistor R2 is set between the terminal 4 and the rectifier circuit, a MOS tube Q2 and...

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PUM

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Abstract

The invention provides a driving circuit capable of selecting an LED output current by jacks. The driving circuit comprises an input power supply, an EMI circuit, a rectifying circuit and a control output regulation circuit connected in sequence; the control output regulation circuit comprises a dimming driving chip; the dimming driving chip is connected with an MOS transistor Q1 and a sampling resistor R6; the output end of the MOS transistor Q1 and the output end of the rectifying circuit are jointly connected with multiple output terminals; an MOS transistor Q2 and an MOS transistor Q3 are connected between the dimming driving chip and the sampling resistor R6; the MOS transistor Q2 is connected with a resistor R4; the MOS transistor Q3 is connected with a resistor R5; a first comparator is connected between the MOS transistor Q2 and a resistor R2; and a second comparator is connected between the MOS transistor Q3 and a resistor R1. According to the driving circuit, the LED output current can be selected by selection of the jacks, so that the applicable range of the power supply drive can be expanded.

Description

technical field [0001] The invention belongs to the technical field of LED driving, and in particular relates to a driving circuit for selecting an LED output current through a socket. Background technique [0002] In the existing technology, the output current of the traditional LED driver is single, and the only definite output current is obtained by adjusting the resistance value of the sampling resistor of the dimming chip, and the output current cannot be effectively adjusted according to the real-time demand. Meet the needs of different lamps, affect the use of LED drivers and dimming range. Contents of the invention [0003] The purpose of the present invention is to provide a driving circuit for selecting the output current of LED through the jack, to realize the function of selecting the output current of the LED through the selection of the jack, and to improve the applicable range of power driving. [0004] The present invention provides following technical sch...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00
Inventor 董拥刚贵彬力
Owner 盐城莱廷绍工业技术有限公司
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