Variations in Vf and “binning”
LEDs’ forward voltage drop varies from device to device and by more than you might think. This causes a few issues for the user. The Lite-On LTST-C170TBKT InGaN blue LED datasheet, for example, shows the forward voltage varies between 2.8 V and 3.8 V at 20 mA. This is quite a variation. The lower value would, just about, allow … Continue reading “Variations in Vf and “binning””