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Intelligent general light-emitting diode (LED) street lamp illuminating power supply system

A technology of LED street lamps and lighting power supplies, applied in electric light sources, lighting devices, light sources, etc., can solve problems such as burnout and burnout, and achieve the effects of simplifying circuits, prolonging service life, and improving efficiency

Inactive Publication Date: 2011-02-09
FUDAN UNIV +1
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Problems solved by technology

[0007] During the use of LED street lamps, it is inevitable that a certain LED lamp will fail and burn out, making this string of LEDs unable to work, while the current flowing through the other strings of LEDs will exceed its rated current, causing one LED lamp to burn out, and the other strings of LEDs will fail to work. The chain reaction of street LED lights being burned one by one

Method used

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  • Intelligent general light-emitting diode (LED) street lamp illuminating power supply system

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[0026] Such as figure 2 As shown, in the present invention, the surge protection circuit is composed of varistor R2, which is connected in parallel on the input mains network; the electromagnetic interference suppression circuit (ie EMI protection circuit) is composed of capacitors C1, C2, C3, C4 and Composed of inductance L1, connected after the surge protection circuit; the mains network is isolated from the switching power supply circuit by these two protection circuits; in the switching power supply circuit, resistors R3, R4, R5, R6, R7, R8, R9 , R10, R11, R12, R13, R14, R15, R16, R17, R18, rectifier bridge stack D1, diodes D2, D3, capacitors C5, C6, C7, C8, C9, MOS FET Q1, primary of transformer T1 , and power factor correction chip L6562 (STMicroelectronics) constitute its primary control part; the secondary of transformer T1, optocoupler isolation feedback circuit (composed of resistor R19 and optocoupler U2), overvoltage protection circuit (composed of Resistors R20,...

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Abstract

The invention belongs to the technical field of light source illuminating and electronics, in particular relates to an intelligent general light-emitting diode (LED) street lamp illuminating power supply system. The system comprises an input surge protection and electromagnetic interference suppressing circuit, a BOOST-BUCK isolation backlash power factor correction switch power circuit, an LED chip temperature detection circuit, an ambient brightness detection circuit, a permanent calendar chip, a peripheral circuit, an LED failure detection circuit, a singlechip circuit and a constant-current output control circuit. In the switch power circuit of the invention, a circuit structure is simplified and circuit efficiency is improved based on an active power factor correction (PFC) control chip L6562,; and the singlechip circuit monitors the ambient brightness, the temperature of the LED chip, time and LED fault in real time by taking a chip STC12C5606AD as a control core and intelligently adjusts the output brightness of the LED according to different situations, so that energy is saved and the service life of an LED street lamp is prolonged effectively at the same time.

Description

technical field [0001] The invention belongs to the field of light source lighting and electronic technology, and in particular relates to a general LED street lamp lighting power supply system. Background technique [0002] LED lighting has three major advantages: energy saving, environmental protection and long life. No matter from the perspective of my country's energy saving and emission reduction strategy or the development strategy of the light source and lighting industry, it is necessary to vigorously develop semiconductor lighting. [0003] The brightness of LED street light mainly depends on the amount of current flowing through it. According to the volt-ampere characteristic curve of the LED, a small voltage change will cause a large change in the current, resulting in a large change in the brightness of the LED street light. Therefore, the mainstream high-power LED street lamp power supply system is driven by a constant current source. The traditional switchin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/03H05B37/02H02M1/42
CPCY02B20/42Y02B20/48Y02B70/126Y02B20/40Y02B70/10
Inventor 陈雄郭继强
Owner FUDAN UNIV
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