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Commercial power LED constant current driver

A technology of constant current driver and mains power, which is applied in the direction of electric light source, circuit layout, lamp circuit layout, etc., can solve the problems of serious electromagnetic radiation, high cost, complex design, etc., and achieve simple design, low cost, safe and stable use Effect

Inactive Publication Date: 2009-09-16
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

At present, the most widely used switching LED driver has excellent performance, but it has high cost, complicated design, and serious electromagnetic radiation.

Method used

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  • Commercial power LED constant current driver

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings:

[0019] See figure 1 This kind of commercial LED constant current driver includes rectifier circuit 1, filter circuit 6, reference voltage source circuit 2, stabilized power supply circuit 3, voltage sampling circuit 4, voltage comparator 7, MOSFET (insulated gate field effect tube Q1) , The third capacitor C3 and the current detection circuit 8.

[0020] The composition and functions of the above circuits are as follows:

[0021] (1) The rectifier circuit 1 forms a rectifier bridge with four diodes D1-D4, the input end of the rectifier bridge is connected to AC mains, and the output end of the rectifier bridge is connected to the filter circuit 6. The rectifier circuit 1 converts the mains power into pulsating DC power and supplies it to the LED lamp group, the third capacitor C3 and the filter circuit.

[0022] (2) The filter circuit is composed of the fifth dio...

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Abstract

The invention discloses a commercial power LED constant current driver, which comprises a rectification circuit and a filter circuit which are used for rectifying and filtering commercial power and outputting rectified alternating current, and also comprises a reference voltage source circuit, a stabilized voltage supply circuit, a voltage sampling circuit, a voltage comparator, an MOSFET and a third capacitor. The commercial power LED constant current driver can obviously reduce the cost of an LED driver circuit, has the equivalent performance and efficiency with a switching type LED drive circuit, has simple design, needs no transformer and inductive component, does not generate high-frequency electromagnetic radiation, and is safe to use.

Description

Technical field [0001] The invention belongs to the field of LED commercial lighting applications, and relates to an LED driver, in particular to a commercial LED constant current driver for lighting. Background technique [0002] Global energy shortages and environmental pollution are particularly prominent in China, which is experiencing rapid economic development. Energy conservation and environmental protection are urgent issues that China needs to solve to achieve sustainable social and economic development. The annual electrical energy consumption of lighting accounts for about 12% to 15% of the total electrical energy consumption. As a large energy consumer, it is necessary to find a new generation of energy-saving and environmentally friendly light sources that can replace traditional light sources as soon as possible. LEDs have advantages over traditional lighting sources, such as lower power requirements, better driving characteristics, faster response speed, higher sho...

Claims

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Application Information

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IPC IPC(8): H05B37/00H05B37/02H02M7/06F21V23/00F21Y101/02F21Y115/10
Inventor 史永胜张普雷史耀华
Owner SHAANXI UNIV OF SCI & TECH
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