Working characteristics of LED light source

The VF voltage of LED light sources for lighting is very low, generally VF = 2.75-3.8V, IF is 15-1400mA; therefore, the output voltage of LED driver IC is VF XN or VF X 1, IF constant current is 15-1400mA. There are two types of LED light sources used in LED lamps: low power (IF = 15-20mA) and high power (IF> 200mA). Low power LEDs are mostly used for LED fluorescent lamps, decorative lamps, grille lamps; high power LEDs are used for home lighting, spotlights, underwater lamps, wall washers, street lamps, tunnel lamps, car work lamps, etc. High power LED light sources are low voltage, high current driven devices, and their luminous intensity is determined by the current flowing through the LED. Excessive current will cause the LED light to attenuate, and too weak current will affect the luminous intensity of the LED. Therefore, the LED driver needs to provide a constant current power supply to ensure the safety of high power LED use and achieve the ideal luminous intensity. In the field of LED lighting, in order to reflect the characteristics of energy saving and long life, it is crucial to choose a good LED driver IC. Without a good driver IC match, the advantages of LED lighting cannot be reflected.