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A cob type LED street lamp driver capable of electronic heat dissipation and automatic dimming

An automatic dimming and circuit technology, applied in the direction of electric light source, electric lamp circuit layout, light source, etc., can solve the problems of high power, poor heat dissipation of LED street lamps, and burning out COB street lamps.

Active Publication Date: 2019-03-15
SHANGSI COUNTY DONGDONG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This COB type LED street light is small in size, high in power, and generates a lot of heat when it works. Although the COB street light has a large-volume aluminum shell for heat dissipation, the temperature of the lamp body is still very high. In the hot summer, due to the air The temperature is very high, causing poor heat dissipation of the COB LED street lamp, causing serious light decay of the COB LED street lamp, and in serious cases, it will burn out the COB street lamp

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  • A cob type LED street lamp driver capable of electronic heat dissipation and automatic dimming

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Embodiment Construction

[0006] As shown in the attached figure, a single-phase bridge rectifier filter circuit is composed of B, L, and C, among which B is a single-phase bridge rectifier circuit, which converts AC 220V power into pulsating DC; L, C form a compound filter circuit, and The pulsating direct current output by the rectifier becomes a relatively smooth direct current to supply the next stage circuit.

[0007] As shown in the attached figure, IC6 and peripheral circuits form a pulse generator circuit with adjustable pulse width. IC6 is a time base circuit chip of model NE555. Pins 7, 2, and 6 of IC6 and R4, R5, R7, R8, D4, D5 and C11 form a pulse width adjustment circuit; R3 and C9 form a resistance-capacitance step-down circuit. The model of C9 is 224UF, and the withstand voltage is above 400V; D3 is a half-wave rectifier circuit, which converts the compressed AC into pulsating DC; C10 is a filter, which filters out the AC component, so that the pulsating direct current becomes a relative...

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Abstract

Provided is a COB type LED street lamp driver with electronic heat dissipation and automatic dimming functions. A highly-integrated and high-power COB type chip is adopted. A driving circuit with an automatic dimming function drives a COB type street lamp to work. The street lamp works in a state of flaming brightness at the beginning of working, and the street lamp is changed automatically from the state of flaming brightness to a state of low brightness after a set time of continuous working is up. Therefore, the function of automatic dimming is achieved. The energy saving rate of the street lamp is improved by over 25% compared with that of a similar product without the function of automatic dimming. The COB type street lamp is equipped with an electronic heat dissipation device. The working temperature of the street lamp is controlled below 50 DEG C though the refrigeration function of a semiconductor refrigeration piece, and that the street lamp has a service life of up to 50,000 hours is ensured.

Description

technical field [0001] The invention relates to a COB type LED street lamp driver capable of electronic heat dissipation and automatic dimming. Background technique [0002] Among the current LED street lamp products, high-power and highly integrated COB-type LED street lamps occupy a large part of LED street lamps. As the driver of this kind of street lamp, it is driven by a constant current power supply without automatic dimming function, and there is no heat dissipation function. This COB type LED street light is small in size, high in power, and generates a lot of heat when it works. Although the COB street light has a large-volume aluminum shell for heat dissipation, the temperature of the lamp body is still very high. In the hot summer, due to the air The temperature is very high, causing poor heat dissipation of the COB LED street lamp, causing serious light decay of the COB LED street lamp, and in serious cases, it will burn out the COB street lamp. Contents of th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 黄焕珠
Owner SHANGSI COUNTY DONGDONG ELECTRONICS TECH