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LED (light-emitting diode) multi-lamp distributed group drive system

A driving system and distributed technology, applied in the direction of lamp circuit layout, lighting devices, light sources, etc., can solve the problems of large number of elements in the flyback constant current drive circuit, poor EMI performance, low power factor, etc., and achieve simple structure, Effects of improved reliability and enhanced safety

Inactive Publication Date: 2012-06-20
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of the existing independent small-sized LED lamp flyback constant current drive circuit with many components, large volume, high cost, low power factor, poor EMI performance, poor stability, and low efficiency, and provide a high-efficiency The LED multi-lamp distributed group drive system reduces the average number of components of each small LED lamp drive circuit, greatly reduces the size of the circuit, improves system reliability, constant current accuracy, power factor and EMI performance, and at the same time reduces Reduced the driving power cost of a single small LED lamp

Method used

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  • LED (light-emitting diode) multi-lamp distributed group drive system
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  • LED (light-emitting diode) multi-lamp distributed group drive system

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Embodiment 1

[0027] Embodiment one: see figure 2 , This high-efficiency LED multi-lamp distributed group drive system consists of a front-end high-power isolated constant voltage source and multiple rear-end low-power non-isolated constant current sources. The input terminal of the high-power isolated constant voltage source at the front end is connected to the AC mains, which is responsible for converting the AC mains into a set DC voltage and realizing constant voltage output through the power management chip. In addition, it is also responsible for the centralized electrical isolation of the entire system , EMI filtering, system protection and power factor correction. The input terminal of the low-power non-isolated constant current source at the rear end is connected to the output terminal of the high-power isolated constant voltage source at the front end, and the stable DC voltage output by the front end is converted into the required DC current through the constant current circuit ...

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Abstract

The invention relates to an LED (light-emitting diode) multi-lamp distributed group drive system. The system comprises a front-end high-power isolated constant voltage source and a plurality of back-end low-power non-isolated constant current sources. The front-end high-power isolated constant voltage source comprises an input rectifying and filtering circuit, a power supply management chip, a primary clamping circuit of a transformer, a high-frequency transformer, an output rectifying and filtering circuit and an output voltage sampling, comparing and feedback circuit. The input end of each back-end low-power non-isolated constant current source is connected with the output end of the front-end high-power isolated constant voltage source, and stable direct current voltage output from the front end is transformed to required direct current through a constant current circuit so as to realize the single-lamp constant current drive of a small LED lamp. The LED multi-lamp distributed group drive system disclosed by the invention has the advantages of simple structure, small volume, high constant current precision, high reliability, high power factor, high efficiency and the like.

Description

technical field [0001] The invention relates to a high-efficiency LED multi-lamp collecting and distributing group driving system, which is used for centralized driving of a plurality of dispersed small LED lamps at the same time, and belongs to the technical field of LED lighting. Background technique [0002] LED has the advantages of high luminous efficiency, long service life, and good stability, and is widely used in the field of lighting. However, the lack of efficiency, reliability and stability of the LED driving circuit has always hindered the reduction of the cost of the LED lighting system, and restricted the service life and popularization of the LED lighting system. [0003] At present, LED drive circuits can be roughly divided into: resistance step-down drive mode, linear voltage regulator / constant current power supply drive mode, charge pump drive mode and DC-DC conversion drive mode, among which the first choice for LED constant current drive circuit is DC-DC...

Claims

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Application Information

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IPC IPC(8): H05B37/02H02M1/42
CPCY02B70/126Y02B70/10
Inventor 刘廷章沈晶杰曹凌云熊峰
Owner SHANGHAI UNIV
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