At present, the CR and CV modes are generally used in tests of the LED constant-current power supply industry. However, the majority of LED drive power supplies are designed according to the switching principle, with large current and voltage ripples, and the general CR and CV modes are easily subject to interference of high-frequency noise to result in test deviations and even failure of tests. According to the working characteristics, the LED light has the conduction voltage Vd. Only the working voltage of the LED light can be simulated by the CV mode of the electronic load, but the conduction voltage Vd cannot be simulated. Therefore, when the LED driver power supply is tested through the CV mode of the electronic load, the test results are not accurate enough.
LED Power Driver Test
LED Lighting Test
Limit inrush current and protect LED
When power on general power supply, it will generateinrush current. With test current increase, inrush currentwill also increase which may reduce LED lifespan.ITECH DC power supply can effectively limit inrushcurrent, protect LED.
With starting micro-current, voltage rise morerapidly, improving LED test efficiency
When output micro-current, general power supply mayeasily enter limiting current mode which will lead to slowvoltage rise and take more time to light LED. With highervoltage and smaller current, the rising time will beprolonged.ITECH IT6200 dual-range DC power supply has low currentmode, which can light LED very fast.
Forward and reverse leakage current test
LED leakage is extremely small, it reached the level μA.Normally the current can not be captured. Readbackresolution of IT6412 Bipolar DC Power Supply can reachμA level and meet test leakage current testrequirements.