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| Solutions |
| LED driver power supply selection and design issues should be considered |
| 2010.01.26 |
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LED is a light-emitting diode characteristics of tube, it can only power in one direction. Usually LED light output with the adoption of LED current is proportional to, but the white LED in the high current saturation phenomenon would occur, a significant reduction in luminous efficiency, or even failure, so the use of LED current can not exceed its rated specifications. In addition, LED light output with temperature is inversely proportional to, it should minimize the use of well-designed power supply heating and cooling system.
DC current LED drivers are used, so in the city between the CLP and the LED need to add a power adapter that the LED drive power. Its function is to convert AC electricity into DC proper LED. According to the electricity grid rules and LED drive feature requirements, in the selection and design of LED drive power to take into account the following points:
1. High Reliability
In particular, as the drive power LED lamps, installed in the high-altitude, maintenance inconvenient, maintenance costs are greater.
2. Efficient
LED is the energy-saving products, drive higher efficiency in power supply. For the power supply installed in the lighting inside the structure, is particularly important. Because the luminous efficiency of LED with the LED temperature decline, so LED's heat is very important. High efficiency power supply, and its depletion of small power, the lamps inside the heat on small, thus reducing the temperature rise of the lamp. LED light in delaying the decline favorable.
3. High Power Factor
Power factor is the power of the load requirements. Generally less than 70 watts with electrical appliances, there is no mandatory targets. While the power is not a single electrical power factor with a lower little impact on the grid, but at night we light up the same load is too concentrated, would produce power more serious pollution. For the 30 watts to 40 watts of LED driver power supply, said the near future, may have a power factor has a certain index requirements.
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