Driver chips also have high and low points, price and performance have a big difference, generally for demand to use different prices of driver chips, such as no large requirements of customers, the use of low prices of chips, the cost is low, the display effect is naturally higher than the costThe effect is not good. You get what you pay for. But many people do not understand why the effect of the LED screen is good and bad, always feel that it should be the same effect.
The screen chip is the chip used to drive the light screen. The LED display special driver chip is a chip that provides compensation current for the LED and acts as the interface between the microprocessor and the LCD. The performance of the driver chip determines the effect of the broadcast of the LED display screen, which is a key component, just like the central nervous system of the human brain, which is in charge of the physical actions of the whole bodyThe functioning of the brain's mind.
Power consumption and heating problems. Due to the increase in size and density of LED light sources, the output current also increases, and the power consumption and heating problems of LED display chips are particularly prominent. With the development of technology and the advancement of manufacturing process level, the problem will be gradually solved. Application cost problem. A mainstream 16-bit steady-state current LED display driver chip can only drive 16-way LED devices.
When the current enters the chip through the wire, the electrons are pushed into the p zone, where they combine with the hole and release photon energy, which is the led glowThe principle of... The wavelength of the light determines the color of the light, and the color is determined by the material forming the P-N junction. The structure of the screen can be said to have its own advantages, but the difference also has the same manuscript and composition.
LED, polysilicon, IC, etc., can be counted as semiconductor chips, but the materials and processes of semiconductors are not the same; LED is mainly GaN, AsGa, InALGnIn and other materials, with these materials can be out of light, polysilicon, is a form of elemental silicon, can mainly be used to form solar panels and so on.
led display driver chip to provide high output current with minimal external components led display driver chip . The MAX16818 is well suited for both synchronous and asynchronous buck (buck) topologies led display driver chips, as well as boost, buck-Boost, SEPIC, and buck LED driver architectures. Can achieve up to20A/μsled display driver chip Fast LED transient current and 30kHz brightness regulation frequency.
2, led lighting requirements for the driver chip The nominal input voltage range of the driver chip should meet 8~40V DC to cover a wide range of application needs. The voltage resistance is better than 45V. When the input is AC 12V or 24V, the output voltage of a simple bridge rectifier will fluctuate with the grid voltage, especially when the voltage is high, the output DC voltage will also be high.
3, led linear constantStream driver chip products include SM2082C, SM2082D, SM2082G, SM2082S, SM208SM208SM2097e, SM2123E, SM2135E, SM2200P, SM2202P, SM2203P, SM2212EA, and SM2213EA , SM2315E, SM2315EB, the detailed program can contact the led display driver chip for understanding (4OOO 336 5I8).
CreeInc. is a semiconductor company headquartered in North Carolina, United States, founded in 1987, is one of the world's largest LED chip manufacturers. Its products cover LED chip, LED lighting, power semiconductor and RF and microwave devices and other fields, widely used in automotive lighting, indoor and outdoor lighting, aerospace, electronics, communications and other fields.
Foreign eight famous LED chip brand ranking: CREE: famous LED chip manufacturer,CREE products are based on silicon carbide (SiC), gallium nitride (GaN), silicon (Si) and related compounds, including blue, green, ultraviolet light emitting diode (LED), near ultraviolet laser, radio frequency (RF) and microwave devices, power switching devices and silicon carbide (SiC) epitexes for production and research.
China Star (Ledtech electronics), Dongbei (UnityOptoTechnology), Pala optoelectronics, Everlight Electronics, Baihong (BrightLED electronics), Gold bright (KIngbright), LingSen precision industry (LingsenPrecisionIndustries), the target, electronic, Lite - OnTechnology, HARVATEK, etc.
CREE (USA) OSRAM (Germany) NICHIA (Japan) Philips Lumileds (Korea) Seoul Semiconductor (Japan) Toyoda Gosei (Japan) Agilent (USABridgelux (Bridgelux) Taiwan Addison Bay billions of light in the first few are almost a few, and there is no data support for the last few.
With its leading LED technology, Philips has become a leader in the LED industry. Guangdong Zhongshan OPp Lighting Co., LTD., Guangdong Zhongshan OPP lighting Co., LTD., is an innovative and rapidly developing enterprise, is one of the most valuable brands in China, established in 96 years, has made remarkable achievements, its LED lamps in the domestic market share has been in a leading position.
and Yiguang belong to the same productQuality products, but the price is much more expensive than 100 million light, water is larger! Many LED brands, but are miscellaneous and not specialized.
1, Huaxing (Ledtech Electronics), East Bay (Unity Opto Technology), Light Ding (Para Light Electronics), Everlight Electronics, Bright LED Electronics, Kingbright, Lingsen Precision Industries, Ligitek Electronics, Lite-On Technology, HARVATEK, etc.
2, LED chip at present, there are SAN An photoelectric, Huacan photoelectric, Yuanrong photoelectric, GuoXingguang electric, Shilan Ming core, Xiamen SAN An, Dalian Lu MeiWuhan Huacan, Xiamen dry light, Jiangxi Jingneng, Jinko Electronics, Shenzhen Olund, Shanghai Blu-ray.
3, crystal energy Optoelectronics, low-light electronic, dry light optoelectronics, Jingda Optoelectronics, Shenzhen Fangda, Shandong Huaguang, Shanghai Lanbao, etc. Foreign LED chip manufacturers: CREE, HP (HP), Nichia Chemical (Nichia), Toyoda Gosei, Ocean Nicic Acid, Toshiba, Showa Electric (SDK), Lumileds, Asahi (Smileds), Genelite, Osram (Osram), GeLcore, Seoul Semiconductor, etc.Epivalley, etc.
4, CreeInc. Creeinc. is a semiconductor company headquartered in North Carolina, USA, founded in 1987, is one of the world's largest LED chip manufacturers. Its products cover LED chip, LED lighting, power semiconductor and RF and microwave devices and other fields, widely used in automotive lighting, indoor and outdoor lighting, aerospace, electronics, communications and other fields.
5, with professional audio engineers and chip sales team; To provide customers with professional product design and technical support;The products of Weichuang Electronics (Shenzhen) Co., Ltd. enjoy a high status among consumers, and the company has established long-term and stable cooperative relations with a number of retailers and large and well-known domestic enterprises. The variety is complete and the price is reasonable.
6, if calculated by operating income, Qinshang Optoelectronics has become the largest listed company in LED lighting application revenue in China so far, and it is also the first listed company in the industry to take high-power LED semiconductor lighting as the main business.
2, control circuit: this part is responsible for controlling the brightness of the LED lamp, and can be adjusted according to demandThe size of the outgoing current. Output circuit: This part is the core part of the LED driver chip and is responsible for providing the required current to the LED lamp. Safety protection: This part is an important part of ensuring the safe work of the driver chip, which can prevent circuit overload, overvoltage and short circuit.
3, the protection circuit, to provide protection for the LED, to prevent overcurrent, overvoltage and short circuit and other situations. The control circuit provides PWM (pulse-widthmodulation) or other control methods to adjust the brightness of the LED. Generally speaking, the LED driver chip can control a single or multiple LED. There is also a driver chip that can control multiple leds.
4, specifically, the LED driver chip is usually composed of two parts: power part and control part. The power supply part is responsible for converting the input voltage into the voltage and current suitable for the work of the LED lamp, while the control part is responsible for adjusting the size of the current according to the need to control the brightness of the LED lamp.
5, LED driver IC is an integrated circuit, its main function is to convert and control the current suitable for connecting to the LED lamp current. The use of LED driver IC can ensure the normal operation of LED lamps. LED driver ics usually have a variety of control functions, such as brightness control and current control, which makes them an important part of LED lamps. The role of the LED driver IC is important because it ensures that the LED luminaires have a stable and consistent brightness output.