In the field of LED lighting , in order to reflect the energy-saving LED lamp and long life characteristics, the correct choice of LED driver IC is essential. Without a good driver IC match, the advantages of LED lighting can not be reflected. So when using LED driver IC, which performance indicators should be noted and how to use it? LED lamps of high energy efficiency, long life, the superior performance of environmental protection has been generally recognized: 1, LED high energy-saving: DC drive, ultra-low power consumption (single tube 0.03 ~ 1W) power optical power conversion close to 100%, the same lighting efficiency than traditional light sources more than 80% energy saving. 2, LED long life: LED light source is called longevity lamp. Solid cold light source, epoxy resin package, there is no loose parts of the lamp body, there is no filament light easy to burn, heat deposition, light fast failure and other shortcomings, the service life of up to 50,000 to 100,000 hours, long life than traditional light sources 10 Times more. 3, LED environmental protection: LED is a green light source, environmental benefits better. No ultraviolet and infrared spectrum, low heat and no flicker, no radiation, and recyclable waste, no pollution, mercury-free elements, cold light source, you can safely touch, is a typical green light source. LED light working characteristics: VF LED lighting with low VF voltage, under normal circumstances 2.75 ~ 3.8V, IF is generally 15 ~ 1,400mA. Therefore, the LED driver IC output voltage is VFxN or VFx1, IF to maintain a constant current in 15 ~ 1,400mA. LED lamps use LED light source with low power (IF is 15 ~ 20mA) and high power (IF is greater than 200mA) two. Low-power LED used to make LED fluorescent lamps, decorative lights, grille lights. High-power LED is used to make home lighting, spotlights, underwater lights, wall washer lights, street lights, tunnel lights, car work lights and so on. Power LED light source is a low-voltage, high current-driven devices, the luminous intensity of LED current through the size of the decision. LED current caused by excessive light attenuation, the current is too small will affect the LED's luminous intensity. Therefore, the LED driver needs to provide constant current power supply to ensure the safety of high-power LED, while achieving the desired luminous intensity. In the field of LED lighting, in order to reflect the energy-saving LED lamp and long life characteristics, the correct choice of LED driver IC is essential. Without a good driver IC match, the advantages of LED lighting can not be reflected. LED lamps on the low-voltage driver chip requirements: 1, the nominal input voltage range of the driver chip should meet the DC 8 ~ 40V, to cover a wider application needs. Pressure capacity is better than 45V. When the input is AC 12V or 24V, the output voltage of a simple bridge rectifier fluctuates with the grid voltage, especially when the voltage is high, the output DC voltage will also be high. If the driver IC does not have a wide input voltage range, it tends to breakdown when the voltage of the power grid rises, thus burning the LED light source. 2, the nominal output current of the driver chip requires more than 1.2 ~ 1.5A. As the LED light source for lighting, the nominal operating current of a 1W power LED light source is 350mA, and the nominal operating current of a 3W power LED light source is 700mA. Large power LED light source needs more current, so the LED lighting lamp driver used must have enough current output, the design of the product must also make the driver IC at full load output of 70 to 90% of the best work area. The use of full-load output current drive IC in a narrow space for poor cooling lamps, lamps easily lead to fatigue and early failure. 3, the output current of the driver chip must be kept constant, so that the LED can stably emit light without flickering. The same batch of driver chips used in the same conditions, the output current size as much as possible, that is, the dispersion is smaller, so that in the mass production of automated production lines to ensure effective and orderly. For the output current has a certain discrete driver chip, must be selected before leaving the factory or put into production line sub-file selection, adjust the current on the PCB board to set the resistance of the resistor size, so that the production of LED lamps constant current driver board of the same LED Luminous brightness of the light source in order to maintain the consistency of the final product. 4, the driver chip package should be conducive to the rapid cooling of the driver chip die, such as the direct bonding of the die on the copper, and a pin directly extended to the package, so that the direct welding of copper on the PCB board Quick heat conduction. If a similar 4x4mm chip to pass a long time 300 ~ 1,000mA current, it will inevitably generate power and heat, so the chip's physical cooling structure is also very important. 5, Driver chip EMI, noise and high voltage capability is also related to the entire LED lighting products can successfully passed CE, UL certification, so in the design of the driver chip should use advanced topology and high-pressure production process. 6, the driver chip's own power consumption requirements of less than 0.5W, switching frequency requirements greater than 120Hz, in order to avoid the occurrence of frequency interference visible flashing. In short, LED green lighting prompted the driver chip to innovative design development. LED lighting lighting can not be separated from the driver chip, so you need multi-function LED light source driver IC. If the LED lamps use less than 36V AC power supply, non-isolated power supply can be considered; if the choice of 220V and 100V AC power supply, you should consider isolation power supply. Directly using the exchange of 100 ~ 220V driver chip, due to the application of the volume of the demanding requirements, there are higher technical requirements, more difficult, at present, all countries are working hard to develop. Massive demand for LED lamps market for all the successful design of integrated circuit companies the opportunity, if you can quickly transition, early products, you win a lot of opportunities.