Choose LED Light Source Module Chip Skills

The price of LED light source modules has been developed in the near future, and LEDs have been widely recognized as green and environmentally friendly cleaning light sources. LED light sources have long service life, energy saving and power saving, simple and convenient application, and low use costs. Therefore. As early as 2008, the world's annual home lighting seat shipments were about 50 billion yuan. The technology of LED light sources has become increasingly mature, and the light flow of each tile has increased rapidly, prompting it to reduce the price by year by year. The large market and continuous stable growth demand for LED green lamps will be the super tsunami market in the integrated circuit industry after VCD, DVD, mobile phones, and MP3! The superior performance of high energy saving, long life, and environmental protection of LED lamps is generally recognized. 1. LED high energy -saving: DC driver, ultra -low power consumption (single tube 0.03 1W) Electric light power conversion is close to 100, the same lighting effect is more than 80%more energy -saving than traditional light sources. 2. LED long life: LED light source is called longevity light. Solid cold light sources, epoxy resin packaging, and no loose parts in the lamp body. There are no shortcomings such as filament lighting, heat sinking, and fast light. More than more. 3. LED Protective Environmental Protection: LED is a green light source, and environmental protection benefits are better. There are no ultraviolet and infrared rays in the spectrum, low calories and free flash, no radiation, and waste can be recycled. There is no pollution without mercury, cold light sources, which can be touched safely. It belongs to a typical green lighting source. The work characteristics of the LED light source module are very low in VF voltage of LED light sources. Generally, it is 2.75 3.8V. Therefore, the output voltage of the LED drive IC is VFXN or VFX1, and the IF keeps constant flow at 15 1,400ma. The LED light source used by LED lamps has two types: small power (IF is 15 20mA) and high -power (IF greater than 200mA). Little power LED is mostly used as LED solar lights, decorative lights, and grille lamps. High -power LED is used for family lighting, spotlights, bottom lights, wall lamps, street lights, tunnel lights, car work lights, etc. The power LED light source is a low -voltage and large current -driven device. Its luminous strength is determined by the current flowing through the LED. The current will cause the LED light attenuation, and the current is too small will affect the luminous strength of the LED. Therefore, the driver of LED needs to provide a constant current power supply to ensure the safety of high -power LEDs, and at the same time achieve the ideal lighting intensity. In the field of LED lighting, in order to reflect the characteristics of LED light energy saving and long life, it is important to correctly choose the LED driver IC. Without a good driver IC match, the advantages of LED lighting cannot be reflected. LED -side light source LED injection molding module LED light strip LED waterproof irrigation glue module Hongyan cabin three -one cabin LED light source module requirements for low -voltage driving chips should be met with the nominal input voltage range of the driving chip, DC 8 40V, to cover wider application needs. Ability to resist pressure is greater than 45V. When the input is AC 12V or 24V, the simple bridge rectifier output voltage will fluctuate with the grid voltage, especially when the voltage is high, the output DC voltage will be high. If the driving IC does not have a wide input voltage range, it will often be penetrated when the power grid voltage is rising, thereby burning the LED light source. 2. The nominal output current of the driving chip requires greater than 1.2 1.5A. As a LED light source for lighting, the nominal current of the 1W power LED light source is 350mA, and the nominal working current of the LED light source of 3W power is 700mA. LED light sources with high power requires a larger current, so the driver IC selected by LED lighting fixtures must have sufficient current output. When designing products, the driver IC work must be used to work at 70-90%of the best working area of 70-90%of the full load output. Drive ICs using full load output current are not dissipated in the small space of the lamps, which can easily lead to fatigue and early failure of the lamp. 3. The output current of the driving chip must be kept constant, so that the LED can shine stably without flashing. The same batch of driving chips is used under the same conditions, and its output current should be as consistent as possible, that is, the discreteness must be small, so that it can ensure effectiveness and order when producing on a large number of automated production lines. For a certain discrete chip with a certain disclosure of the output current, it is necessary to select the selection in front of the factory or put it into the production line, adjust the resistance value of the current setting resistance on the PCB board, so that the LED lamps -the constant current drive board produced by the PCB board The light and brightness of the light source is consistent to maintain the consistency of the end product.