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18 Sep, 2016 1963 Views Author: root

How to evaluate the LED power driver?

LED power driver is one of the key parts of LED luminaries, the performance of the driver will greatly affect the product quality. The lower driver efficiency, the lower efficiency conversion ratio, this is not only influence the product quality, and also will bring the heat dissipation problem. The driver failure is the important factor to affect the LED life. Now the power driver is the reason caused the LED failure and flicker, so LED power driver test is not ignored.

LED power driver is a voltage transformer which converts the power supply to certain voltage and current to driver the LED emitting. Generally, there are two conversion methods, AC to DC and DC to DC. And there are three drive modes: constant current (CC), constant voltage (CV) and CC&CV. The driver performance is so important to do the LED driver test. At the moment, LED driver test includes electric performance test and EMC test.

Electric performance is the basic characteristics of LED driver, which directly affect the LED light quality and energy efficiency conversion. Input, output and startup characteristics are the main parts for LED driver test. Stable voltage and current, power factor, start time, output over voltage (current) protection value, input impulse current and output current (voltage) ripple wave are the request data. Normally, it will need many equipments to test all, but combine the standard of IEC62384:26 (DC or AC Supplied Electronic Control Gear for LED modules-performance requirements), Lisun Group push the WT2080 LED power driver tester to test all the data at one time, which is easy to operation. And equip with software, all the data and change curve can be printed and show in the test report with nice looking.

Beside the electric performance, the driver failure also has something to do with a lot of factors, EMC is the most important part. Along with the driver developing, the power driver integrated a lot of electronic components, like driver circuit, switch controller, inductor, MOSfet, feedback resistor, input filter, output filer and etc. And it may also include input over voltage protection circuit, input under voltage protection circuit, LED open circuit protection and over current protection circuit in some special occasion. Thus, EMC test (interference and anti-interference) is greatly important for LED driver. The EMC includes electrostatic test, surge test and EMI test. Moreover, ring wave test is also be requested by Energy Star in April, 2013. For this, Lisun Group pushed series of EMC test equipments, includes ESD61000-5 Electrostatic Discharge Simulator, SG61000-5 Surge Generator, RWG61000-12 Ring Wave Generator and KH3962 EMI Test System.

The quality of LED power driver will greatly make influence to LED efficiency, reliability and quality. So, the driver manufacturers should choose the right LED driver test solution to make comprehensive evaluation base on its features and relative standards. It can not only improve the LED quality, and also will make contribution to LED developing.

WT2080 LED driver tester and EMC test equipments is widely applied to Luminaries manufacturing enterprise and lab, like Institute of Testing and Certification India Pvt. Ltd (India), LED shine (Netherland), PT. SHARP SEMICONDUCTOR INDONESIA (Indonesia), TUV Rheinland InterCert Kft.( Hungary), Capital Power Systems Ltd(India) ,Fiberli (Turkey) and etc. The reason why Lisun can win some many customers is because we always practice the motto of right products, right price and right service. Lisun will continue feedback good quality products and superior service in the feature.


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