The relationship between the quality of LED lamps and driving power supply: LED is the abbreviation of "LightemittingDiode" in English, abbreviated as light-emitting diode in Chinese. Due to its many advantages such as environmental protection, long lifespan, high photoelectric efficiency (currently reaching 100LM/W), earthquake resistance, etc., it has been rapidly developed in various industries in recent years. In theory, the service life of LED is about 100000 hours, but in practical applications, Some LED lamp designers have insufficient understanding or improper selection of LED driver power supplies, or blindly pursue low costs, resulting in a greatly shortened lifespan of LED lamp products. Poor LED lamp lifespans are less than 2000 hours, and some even lower, resulting in the inability to fully utilize the advantages of LED lamps

Due to the unique nature of LED processing and manufacturing, there are significant individual differences in the current and voltage characteristics of LEDs produced by different manufacturers or even the same manufacturer in the same batch of products. Taking the typical specifications of high-power 1W white LED as an example, a brief explanation will be given based on the current and voltage changes of the LED. Generally, the forward voltage for 1W white LED applications is around 3.0-3.6V. That is to say, when a nominal 1W LED flows through a 350 milliampere current, the voltage at both ends may be 3.1V, 3.2V, 3.5V, or other values. To ensure the lifespan of 1W LED, LED manufacturers recommend that the lamp factory use 350mA current to drive, When the forward current passing through both ends of the LED reaches 350 milliamperes, a small increase in the forward voltage at both ends of the LED will cause a significant increase in the forward current of the LED, causing the temperature of the LED to rise in a straight line, accelerating LED light decay, shortening the lifespan of the LED, and even burning the LED in severe cases. Due to the unique changes in voltage and current of LEDs, strict requirements are put forward for the power supply driving LEDs.