With 2007 IIC, the United States launched a letter high brightness LED driver market battle

"High brightness LED drive market is still very young, but the development is very fast, more products, intense competition. At 2007 IIC, the United States and the letter company (Maxim) system power management business manager Muzahid Huda commented. The wearing a retro glasses of Americans, who fought in Japan, South Korea, China and other markets, the development of high brightness LED has its own views.

Today, more and more LED drive function, the application field is more and more widely, how to integrate more features into smaller packages, is a common goal of all LED driver manufacturers. In order to meet different customer needs, the letter, half the country launched a wide range of technology, all products on the world market, China even launched a battle.

However, the letter system power management business application engineer Weng Dafeng pointed out: "although China high brightness LED driver market potential, but the current monopoly of high brightness LED market in a serious, only get rid of these non market behavior, high brightness LED industry will have a big development. Many manufacturers believe that the development of high brightness LED drive market still needs about 2 years gestation period.

Series of products to seize the market segments

In this IIC, the letter also launched 10 new products to automotive applications, general lighting AC/DC input, projector, rear projection TV, LCD TV, desktop and notebook computer backlight and other market segments, launched an attack.

According to the letter of the United States Muzahid Huda introduction, automotive applications is the focus of the United States to open up the market. In a variety of new products, MAX16823 is a highly integrated high voltage, 3 channel, high linearity LED driver, suitable for automotive exterior and interior lighting applications. The product operates in the 5.5V to 40V input voltage range and can be compatible with cold start and load rejection (up to 45V). MAX16823 each channel can provide a series or more than a bunch of high brightness LED up to 70mA of the current, and the drive current is more than 70mA only need to add a low cost external bipolar junction transistor can be achieved.

Moreover, the MAX16823 also features an active high level, open drain LEDGOOD output for LED open circuit detection. Combined with a variety of properties of MAX16823, has a high degree of integration, making it ideal for tail light (RCL), CHMSL (CHMSL), and RGB indicator lights, HB LED driver. MAX16823 provides operating temperature range of -40 DEG C to +125 DEG C, with a bare pad 16 pin, TQFN lead-free package or TSSOP lead-free package.

Meanwhile, the letter also launched the industry's first high efficiency, high power, fast transient response of the high brightness LED driver MAX16818, suitable for projection and lighting applications. The United States said Weng Weng Weng said: MAX16818 using the United States and innovative LED controller architecture, can achieve up to 20A/ s fast LED transient current and 30kHz brightness adjustment frequency. "The MAX16818 PWM controller uses a compact, lead-free package that provides a large output current with a minimum of peripheral components. This product adopts average current mode control with synchronous gate drive circuit and a wide range of switching frequency, suitable for high power LED light source, the driver program, which can be widely used in commercial, portable and pocket projector, home theater systems, television, and automotive and industrial lighting device.

MAX16818 ideal for synchronous and asynchronous buck topology, as well as Buck, buck, SEPIC, and Cuk LED driver architecture. The device uses average current mode control, optimization of MOSFET charge and conduction resistance, thereby reducing the external heat dissipation requirements, even if the LED output current up to 30A can also take time for. The device's flexibility and small size can achieve 5W to 200W drive design and can provide the industry with the highest efficiency (up to 94%). True differential detection technique can accurately control the LED current. Through the external PWM signal can easily achieve a wide range of brightness adjustment. The internal voltage regulator, combined with a simple external bias device, allows the device to operate over a wide input voltage range from 4.75V to 5.5V, 7V to 28V, or higher. Wide switching frequency range (up to 1.5MHz) allows the use of small size inductors and capacitors.

In addition, the letter also released for other segments of the market products, such as MAX16819/MAX16820 3X3mm package volume is only suitable for small volume applications for automobile tail light brightness control MAX16823 with programmable function MAX16806. The United States will continue to expand the product line, the product contains a linear and switching topology (bust, boost and SEPIC, etc.). Muzahid Huda explained: "now the price of high brightness LED fell rapidly, in order to win more market profits, we must provide different product solutions for different market needs, to occupy the leading position. For example, he said, before the LED panel driver IC and the background light driven IC is separate, but in order to adapt to the needs of small size, to combine these two IC. To this end, the United States will also be introduced to improve the quality of LED TV image of new products, grasp the future direction of market development.

It is understood that the United States and the United States Department of high brightness LED only set up 2 years, but the development is very fast, optimistic about the prospects for the development of high brightness LED. The United States, Weng Weng Weng admitted: at present, the cost is still an important reason to prevent the rapid development of high brightness LED driver. "But he also pointed out that although a single high brightness LED driver, the cost is relatively high; but from the system point of view, high integrated LED driver has reduced the cost of peripheral devices, thus reducing the cost of the whole system. For example, when street lamps use a relatively high cost