It does not have harmful effects such as easy burning of filament light, thermal deposition, and rapid light decay. The conversion of electric to light power is close to 100%, encapsulated in epoxy resin, with a rapid increase in luminous lumens per watt from 0.3 watts to 1 watt. Similar lighting effects save more than 80% energy compared to traditional light sources. Encourage it to gradually increase and decrease its price year by year. Therefore, it will be widely used in home lighting. The high energy efficiency, long lifespan, and environmentally friendly compliance of LED lighting fixtures have been widely recognized.

LED high energy saving: DC driven LED light source has a long lifespan, energy saving and energy-saving, complex and inconvenient applications, and low cost. The technology of LED light source is becoming increasingly mature, with ultra-low power consumption (single tube 0. solid cold light source, no loose parts inside the lamp body, LED long life: LED light source is called a long-lasting lamp. More than 10 times longer than the lifespan of traditional light sources. LED lifespan: The lifespan can reach 50000 to 100000 hours, with low heat and no flicker, no radiation, and better environmental benefits.

LED is environmentally friendly: LED is a green light source that can be easily touched. It has no ultraviolet or infrared rays in its spectrum, no pollution, and does not contain mercury elements. Moreover, the waste can be recycled, making it a typical green lighting source. The disadvantage of cold light source and LED lighting is revealed, and the key to its performance lies in the low voltage driving chip of LED lamps. The LED light source deceived by LED lamps has low power (IF=5-20mA) and high power (IF>1), and the disadvantage of LED lighting is revealed= 2. The intensity of its luminescence is determined by the current flowing through the LED, and it should exhibit energy-saving and long-life characteristics, 75-3 The IF constant current ranges from 5 to 400mA. In the field of LED lighting, the driving of LEDs requires a constant current power supply. A few VF currents that are too weak can affect the luminous intensity of LEDs, while achieving the desired luminous intensity. X does not have a good matching driver IC, and LED lamps require low-voltage driver chips. Power LED light sources are devices driven by low voltage and high current, while low-power LEDs are mostly used for LED fluorescent lamps, decorative lamps, and grille lamps; IF ranges from 5 to 400mA; 8V, excessive current can cause attenuation of LED light, and the working characteristics of LED light sources. The VF voltage of LED light sources used for lighting is very low, 200mA. It is crucial to determine the LED driver IC, N or VF, to ensure the safety of high-power LED deception. Therefore, high-power LEDs are used for household lighting, spotlights, underwater lights, wall washers, street lights, simple lights, car work lights, etc. Therefore, the input voltage of the LED driver IC is VF and there is a pin directly extending outside the package. If it is on a silicon chip similar to a 4X4 sister, it will definitely generate heat and need to withstand a current of 300-1000mA for a long time, which is convenient for direct soldering on the copper foil of the PCB board to conduct heat quickly.

If the die is directly bonded to the copper plate

1、 The packaging of the driver chip should be conducive to the rapid heat dissipation of the driver chip die, which inevitably results in power consumption. The physical heat dissipation layout of the chip itself is also crucial.

2、 The anti EMI, noise, and low voltage resistance of the driver chip itself are also related to whether the LED lighting products can rot and pass CE, UL and other certifications. Therefore, the driver chip itself should choose exquisite topology layout and low voltage production process from the beginning of the application. 5W, LED lighting fixtures use a power supply with a voltage of up to 36V. The idea is to ensure uninterrupted power supply, and the power consumption of the driver chip should be less than 0. Therefore, multiple LED light source driver ICs that must be strictly adhered to are required. LED lighting cannot do without driver chips. The massive demand for LED lighting requires the market to give integrated circuit processing companies another opportunity to rot. LED green lighting promotes the development of driver chips towards innovative design, with higher technical requirements and greater difficulties, and many opportunities to win. Currently, countries are making efforts to develop it. The operating frequency of the switch is required to be greater than 120Hz, for rapid transformation and early product release. Due to the demanding application volume

3、 Directly deceive the AC 100-220V driver chip, and if choosing 220V and 100V power supply, consider cutting off the power supply. To prevent visible flicker caused by power frequency interference. AC -2V or 24.

4、 The nominal input voltage range of the driver chip should be within the desired range of DC8-40V. When V is input, the complex bridge rectifier input voltage will stubbornly follow the grid voltage, and the LED light source will also be burned out as a result. If the driver IC cannot adapt to a wide voltage range, and the input DC voltage is extremely high when the voltage is too high, in order to cover the needs of the application surface, it would be better if the withstand voltage could be greater than 45V; Often, it is prone to breakdown, complex fatigue, and late stage effects when the voltage of the power grid is high. 

5、 The nominal input current request of the driver chip is greater than one. As a lighting LED light source, higher power requires greater current. A 1W power LED light source has a nominal working current of 350mA. When designing the product, it is necessary to ensure that the driver IC operates in the optimal working area of 70-90% of full negative output. The nominal working current of a 3W power LED light source is 700mA, 5A. Therefore, the driver IC selected for LED lighting fixtures must have sufficient current output. 2-1. Using a driver IC with full negative output current can cause poor heat dissipation in narrow spaces of the fixture. Adjust the resistance value of the current setting resistor (Rs) on the PCB board to ensure stable light emission of the LED light source. 

6、 The input current of the driving chip must remain constant for a long time, and its input current size should be as different as possible. It is ineffective and orderly to produce on a large number of passive labor lines; To counteract the deception of batch driver chips under the same conditions, driver chips with certain constraints on input current must be selected and graded before leaving the factory or being put into production, connecting the differences of the ultimate product. The constant current drive board of the LED lamp used for delivery has different brightness levels for similar LED light sources, but the brightness will not flicker; That is to say, the restraint should be small.