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2013•Journal of Circuits and SystemsRequires access

Current automatic adjustable low-power LED driver circuit

Li Xiang

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Abstract

LED light source as a new,green and environmental friendly light,has advantages of long life,high luminous efficiency,high brightness and low operating voltage.In view of the requirements of over-temperature protection and reduce power consumption about LED drive circuits,this paper introduces a LED driver circuit for temperature-sensitive resistor to automatically adjust the LED drive current and reduce the sampling resistor power.Compared with the commonly used LED,this circuit has an advantage over the others.When the temperature comes to protection point,the LED drive current is not directly reduced to zero,but be decreased softly with the increases of the system temperature,in the premise of changes in flux are not obviously detected by human eyes.Therefore,it is more suitable for lighting and other fields.This paper select 350 mA LED drive current and the LED light array is composed of M×N matrix.

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What this paper is about

LED light source as a new,green and environmental friendly light,has advantages of long life,high luminous efficiency,high brightness and low operating voltage.In view of the requirements of over-temperature protection and reduce power consumption about LED drive circuits,this paper introduces a LED driver circuit for temperature-sensitive resistor to automatically adjust the LED drive current and reduce the sampling resistor power.Compared with the commonly used LED,this circuit has an advantage over the others.When the temperature comes to protection point,the LED drive current is not directly reduced to zero,but be decreased softly with the increases of the system temperature,in the premise of changes in flux are not obviously detected by human eyes.Therefore,it is more suitable for lighting and other fields.This paper select 350 mA LED drive current and the LED light array is composed of M×N matrix.

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Available abstract

LED light source as a new,green and environmental friendly light,has advantages of long life,high luminous efficiency,high brightness and low operating voltage.In view of the requirements of over-temperature protection and reduce power consumption about LED drive circuits,this paper introduces a LED driver circuit for temperature-sensitive resistor to automatically adjust the LED drive current and reduce the sampling resistor power.Compared with the commonly used LED,this circuit has an advantage over the others.When the temperature comes to protection point,the LED drive current is not directly reduced to zero,but be decreased softly with the increases of the system temperature,in the premise of changes in flux are not obviously detected by human eyes.Therefore,it is more suitable for lighting and other fields.This paper select 350 mA LED drive current and the LED light array is composed of M×N matrix.

Key concepts: LED circuit, Resistor, LED lamp, Electrical engineering, Current (fluid), Luminous flux, Light-emitting diode, Voltage

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Current automatic adjustable low-power LED driver circuit — Research Paper | ScholarLens