High Efficiency Of LED Driver

Battery life is critical in portable applications. If the LED driver is practical, it must be highly efficient. The efficiency measurement of an LED driver is different from that of a typical power supply. A typical power supply efficiency measurement is defined as output power divided by input power. For LED drivers, the output power is not a relevant parameter. What is important is the value of input power required to produce the expected LED brightness. This can be determined simply by dividing the LED power by the input power.