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Partition type driving circuit for general lighting LED (light emitting diode) street lamp

A technology of LED street lamps and driving circuits, which is applied in the electronic field, can solve problems such as burnout, and achieve the effect of simplifying the circuit, simplifying the circuit, and simplifying the design

Inactive Publication Date: 2011-10-12
FUDAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But when a certain LED fails and blows out, since there is no current flowing in this string of LEDs, the current flowing in other LEDs will exceed its rated current, causing one LED to burn out, and the other LEDs to burn out one by one. chain reaction

Method used

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  • Partition type driving circuit for general lighting LED (light emitting diode) street lamp
  • Partition type driving circuit for general lighting LED (light emitting diode) street lamp
  • Partition type driving circuit for general lighting LED (light emitting diode) street lamp

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Embodiment 1

[0023] like figure 1 As shown, the circuit is mainly composed of surge protection and electromagnetic interference suppression circuit, L6562, isolated switching transformer T1, MOS field effect transistor Q1, microcomputer chip STC12C5410AD, voltage regulator tube LM1117, optocoupler isolator PC817, operational amplifier LM358 and resistors, Composed of capacitors and diodes. The power factor correction is composed of L6562 and its peripheral circuits, the switching transformer T1 completes the voltage conversion, the optocoupler PC817 realizes the isolation of the output circuit from the input mains circuit, the operational amplifier LM358 completes the sampling of the output voltage and the control of constant current and constant voltage, and between them The automatic switching among them, the microcomputer chip STC12C5410AD completes the functions of LED fault detection and output current control.

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PUM

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Abstract

The invention belongs to the technical field of electronics and relates to an LED (light emitting diode) street lamp driving circuit with functions of fault detection and intelligent output current adjustment. According to the invention, the driving circuit comprises an input surge protection and electromagnetic interference suppression circuit, a single tube flyback switching power circuit with a power factor correction function, an LED fault detection circuit, a microcomputer control circuit which can intelligently adjust an output current according to the detection result and an overvoltage protection circuit. The circuit has the security of the partition type LED driving circuit and simultaneously has the power factor correction function, an automatic output circuit adjustment function and an overvoltage protection function. According to the invention, a large quantity of peripheral circuits can be saved, and the driving circuit provided by the invention has the advantages of high power factor, high efficiency, low cost and suitability for batch production; and meanwhile, the circuit also has an LED fault detection function and can automatically adjust the output circuit when an LED goes wrong, so that the LED street lamp without roadblocks can be ensured to operate normally under a safe condition and the service life of the LED street lamp can be effectively prolonged.

Description

technical field [0001] The invention belongs to the field of electronic technology and relates to a general lighting LED street lamp driving circuit. It specifically relates to an isolated general lighting LED street lamp drive circuit, in particular to an LED street lamp drive circuit with the function of intelligently adjusting output current with fault detection. Background technique [0002] With the progress of social development, energy conservation and emission reduction has become the strong voice of the times. Energy saving is the biggest feature of LED, which has very important practical significance in our country. China's lighting electricity consumption accounts for about 12% of the total electricity consumption. It is conservatively estimated that my country's total power generation will reach 3 trillion kWh in 2010, and lighting electricity consumption will reach about 360 billion kWh. The annual power generation of the two Three Gorges Power Stations. The l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
CPCY02B20/72
Inventor 陈雄郭继强
Owner FUDAN UNIV
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