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|The heart of the LED drive power supply, LED energy-saving lamps|
Has long been a driver circuit is an important part of LED application products, LED drive power supply is one of the power supply series products of many species, belong to is to provide LED lighting lamps and lanterns, LED electronic equipment power device, also known as drive power supply, it is to provide energy saving lamps and lanterns lighting electricity and to provide computer related parts need electricity. Are widely used in: LED lights, LED grille lamp, LED interior lights, LED ceiling lamp, building lighting, road and bridge lighting, information graphic display: display board, billboards, dynamic simulation animation, sports venues, car lights and internal reading lamp, car brake lights, tail lights, lights, side lights, explosion-proof lamps, miner's lamp in mining production, etc.
In recent years, the led packaging technology and the continuous development of cooling technology, the stability of the led lights have reached a good level, droop and color drift is mainly some fake products manufacturers, the main reason is that heat dissipation design is not reasonable. As directly restricted the quality of LED drive power LED strong sex, and follow the development of LED industry, LED drive power supply is also gradually mature.
Usually when choosing and design LED drive power supply should consider the following:
The driving mode of 4. Popular now have two kinds: one is a constant voltage source for multiple constant current source, each constant-current source separate for each LED power supply. This way, flexible combination, LED failure all the way, don't affect the work of other leds, but the cost would be slightly higher. The other is a constant current power supply directly, leds in series or parallel operation. It has the advantage of low cost, but poor flexibility, but also solve a LED failure, does not affect other LED running problem. These two forms, for a period of time. Multi-channel constant current output power supply way, in terms of cost and performance will be better. Maybe the mainstream direction of the future.
LED device of the drive power close to demanding, incandescent bulb LED lights are not as popular and can directly connect 220 v ac mains. LED is 2 ~ 3 v low voltage driver, necessary to design complex conversion circuit, different use of LED lights, equipment of the power adapter.