Demand from various applications continues to push up the increase in LED production value. According to estimates from Taiwan's research and development unit Tuoba Industrial Research Institute, LEDTV's penetration rate in this year's TV market will reach 43%, and the penetration rate is expected to reach 100 in 2014. %, shipments will increase from 36.95 million units to 260 million units. In addition, in the high-profile LED lighting, LED bulbs are expected to penetrate the global lighting market ahead of 2011 and will become general in four years. The first choice for consumers to replace the light source. In addition to emerging applications, the penetration of small-size LED backlights in mobile phones and consumer electronics has approached 100%. The demand for LEDs continues to rise. With the increase in the output value of LEDs, the demand for LED driver ICs has also risen. It is estimated that the global LED driver IC market will expand to 3.7 billion in 2010.
As far as application is concerned, LED driver ICs currently have three major categories of market demand. One is for consumer electronic products. The application characteristics are battery-based energy, generally 4.2-8.4V, so low-voltage, low-current LED drivers are At present, the product with the largest output and the widest application; the second is for automotive lighting products, because its power supply comes from the car battery, generally 48V, so it needs a higher voltage step-down LED driver IC; the third is architectural decorative lighting and home lighting , the need to convert the AC directly into a DC LED driver IC, the main function is to convert the AC voltage into a DC power supply, and at the same time complete the matching with the LED voltage and current.
Overall, consumer electronics LED drivers have more mature technologies, products and relatively mature markets. As for the number of LEDs used in automotive lighting products, most of them are series and parallel drives, which require a relatively high voltage, which is very convenient for power sources taken from 48V car batteries.
Drive IC quality is critical to LED lighting performance
Overall, a constant current technology that achieves consistent brightness; pulse width modulation (PWM) integration technology that integrates brightness adjustment functions is a technology development that is consistently pursued by various LED driver ICs. For lighting applications, 220V AC can be directly connected to ordinary incandescent bulbs. LEDs are low voltage drivers of 2-3 volts. Complex conversion circuits must be designed, and LEDs can operate at high efficiency for a long time. The quality of the drive power supply is one of the keys, and the importance of the LED drive IC is thus visible.
Existing LED street lights and home ordinary LED lighting solutions are basically divided into two parts, one is to convert 220V mains to 24V or 48V AC-DC power adapter, and the other is to provide driving current to LED LED buck-boost controller. The products of the LED driver ICs are also developing in these two aspects.
Overall, in various types of LED applications, the field of lighting still belongs to various melee situations, so it has become the focus of LED driver IC layout. Zhang Guocheng, deputy general manager and spokesperson of Lixin Technology, an important player in Asia's analog IC, said that the company had previously prepared a long-term LED general lighting application product. After the product line and related solutions were prepared, it has begun to bring substantial benefits to the company. Performance contribution, the company is also happy to see the development opportunities of the market, it is expected that there will be good development opportunities, and next year LED lighting products can see a certain degree of single-digit revenue.
Reduce drive IC usage and cost
Liye's layout in LED lighting this year includes the LED lighting application driver IC-RT84 series launched recently. Li Wei said that it is different from the buck LED driver IC that uses hysteresis control on the market. The series products adopt fixed frequency control, which keeps the reduction of inductance value one-third of the hysteresis control. The fixed-frequency control mode also has less accuracy than the hysteresis control with the change of input voltage and current. In addition, Lixin also proposes different LED solutions for buck, boost and buck-boost for different LED lighting applications. At present, most of the products on the market are designed with buck LED driver ICs. The advantage of this method is that the design concept is simple, but the number of LED drivers is limited by the limitation of the buck circuit, so that a large number of buck ICs are needed. The Lithium boost driver IC can significantly reduce the usage and cost of more than half of the LED step-down driver IC.
In addition to LED lighting, Zhang Guocheng pointed out that LED backlight driver ICs continue to be developed for large-size applications. Some products have been designed-in to customers' large-size LEDTV products. It is expected that sales of TV application products will be accelerated in the next year. Growing up, and will become the focus of the layout in the next 2-3 years.
Directly applied to AC power
Li Mingru, chairman of Peiheng Semiconductor, also pointed out that the company's previous efforts to deepen the R&D layout during the financial tsunami are expected to accelerate in the second half of this year, one of which is LED lighting. Li Mingru said that the company has developed LED driver IC products for its customers to meet its specifications. It has a competitive base in both heat dissipation and output power. It is currently available in small quantities and is expected to become new next year. Growth momentum.
Pei Heng recently launched a series of LED driver ICs for lighting, which can be designed for different applications, including products designed for MR16, decorative xenon lamps and T8 lamps. Pei Heng also said that the current general LED products on the market are mostly DCLEDs, and rectifier transformers must be used. In this regard, Pei Heng has introduced LED driver ICs that are directly applied to AC power supplies, which can save 15-30% of power consumption when LEDs are switched between DC and AC, and does not require any external capacitors. The product can accept input voltage. Up to 80V, the drive current is also available in 20mA and 30mA. It can be used with LED dimming. It not only meets energy saving and carbon reduction, but also greatly reduces heat dissipation. It is suitable for the design requirements of bulbs and signal lamps.
In addition, Pei Heng has also successfully developed a dedicated chip for the MR16 compatible LED spotlight series. Pei Heng said that this chip can reduce the size and weight of the PCB part of the lamp neck, and reduce the overall manufacturing cost of the lamp equipment.
Single chip solution
In addition, because discrete solutions require not only many components, but also a considerable amount of space. Therefore, some companies have introduced single-chip solutions. For example, NXP has facilitated the development of an integrated single-chip solution. The SSL2101.NXP represents the world's first integrated dimmable commercial LED driver for a small-sized switch mode. Power Supply (SMPS) controller ICs designed to drive LED devices and provide dimming capabilities to further improve the energy efficiency of LED lighting. The SSL2101 can drive a variety of lighting systems with different power requirements, including LED retrofit lamps, LED modules, LED spotlights, spotlights, and LED strings for store displays.
2012 is the key year for the LED lighting market
According to research firm Strategy Unlimited, LED lighting will reach a market value of $5 billion in 2012. Philips, the lighting faucet, also predicts that LED lighting will cause structural changes in the existing lighting market. It is estimated that the fastest LED lighting output value will exceed traditional lighting in 2014~2015, becoming mainstream lighting, and will be in 2017 at the latest. ~2018, and by 2020, the global LED lighting penetration rate in the overall lighting market will reach 80%, business opportunities as high as 100 billion US dollars, Philips pointed out that the lighting market grows by 5% every year, but LED lighting will be annually More than 50% growth rate is replacing the traditional lighting market.
In addition, LED chip faucet Jingdian believes that LEDTV growth rate will begin to slow down after two years, LED lighting will be expected to successfully LED lighting in 2012. Overall, the industry generally believes that 2012 will be a key year for the development of LED lighting, and 2015 to 2018 will be the fastest growing stage. Of course, the LED lighting driver IC will also explode at this stage. It is worthy of being actively placed by the industry.
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