In today's China LED driver supply industry, the market demand for high-cost linear drives and three-leg non-isolated drive solutions is growing very fast, and there is a big price war between them, but there are also a few LED driver suppliers who don't want to go this Red Sea. Road, Shanghai Lai Shi Semiconductor Technology is one of them. It has always adhered to its own differentiated development path. Following the patented two-winding patent technology that LED panel light driving power has been acclaimed, it has recently successfully developed completely independent innovation. A epoch-making milestone-isolated full-voltage, high-PF, low-THD intelligent dimming-free strobe solution.
The series of isolated full-voltage, high-PF, low-THD intelligent dimming and stroboscopic schemes consisting of LIS882X + LIS800X have three unique advantages of differentiation: First, it can be used in multiple topologies, isolated high PF without stroboscopic, full Voltage range PF value is higher than 0.97, THD is less than 5%; Second, compatible with digital dimming and analog dimming, can have 300 times dimming range, can be completely turned off, and maintain relatively high PF during dimming Third, low current ripple. The output is connected in parallel by four 220uF/100V electrolytic capacitors with an electrolytic current ratio of about 1.5.
Figure 1: Lai Shi milestone isolation full voltage high PF low THD intelligent dimming without stroboscopic scheme 
Figure 2: The Lions isolation scheme maintains a PF value of 0.97 or higher over the 90-264Vac range.
Li Zhenhua, Sales Director of Leishi Semiconductor Technology, said: “Lai Shi has always adhered to the concept of independent innovation, and insisted on using innovative technologies and solutions to win customers and promote the development of the industry in LED driver IC research and development.â€
In high- and high-power industrial and commercial LED lighting fixtures with high requirements for anti-surge and reliability, safety and flashing, such as LED panel lights, high-voltage linear solutions and non-isolated drive solutions, it is difficult to meet customer performance of PF and THD. Claim. At present, the industry standard is roughly PF 0.9+, THD "10%. Obviously, the advantages of Lai Shi's intelligent dimming LIS882X + LIS800X series isolated high P low THD solution is very obvious.
Figure 3: Lai Shi dimming LIS882X + LIS800X series isolated high P low THD program ripple performance is particularly good
Li Zhenhua revealed that "in digital control, linear switching, non-isolated analog dimming technology, patented analog-pulse modulation, two-winding auxiliary power supply technology, Miller capacitor patented sampling technology, Lai Shi has mastered the core technology. Moreover, two windings assist The power supply technology was first proposed by Leshi in the LED driver, and the patented analog-pulse modulation technology is also available."
Figure 4: Li Zhenhua, Sales Director, Shanghai Lai Shi Semiconductor Technology
Lai Shi semiconductor driver products are very high in terms of protection and accuracy. Miller Capacitor Patented Sampling Technology, many traditional non-isolated, single windings use the patented sampling technology of Miller capacitors. This technology has forced Lai to continue its technological innovation and compete with other manufacturers.
Li Zhenhua firmly said: "Lai Shi only makes independent innovation products, and the risks are also great. Leishi's representative works include LIS8921 non-isolated analog dimming scheme and intelligent dimming KU5528 module. This intelligent dimming system module realizes intelligent sensing. Intelligent delay function. In the patent design, no need for PWM conversion chip, while retaining open circuit protection and short circuit protection, the brightness of the LED light can be directly controlled by the microwave induction output high and low level."
This concept is also recognized by other big names in the domestic LED driver industry, such as Meixin CEO Cheng Baohong and Ming Wei Electronics General Manager Li Zhaohua. "The domestic IC factory must have innovative products to promote the development of the industry." Li Zhaohua, general manager of Mingwei Electronics, said in an exclusive interview that it is meaningless to talk about price as an IC manufacturer. The most important thing is See what you have done for the industry and what your customers can do.
"Innovation is the driving force of social progress, respecting innovation and protecting innovation, so that China's manufacturing can be respected by the world. Domestic LED drive solutions and technologies are still far away from Europe and America. We must continue to work hard to innovate and make the quality of national life more important. A step, your own products will go up a step." Li Zhenhua, sales director of Leishi Semiconductor, appealed to the LED lighting industry peers.
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