Diodes' LED driver reduces EMI in low cost lamps

Date
10/04/2011

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Switching at a frequency of up to 1MHz and ensuring closely controlled rise and fall times, the AL8807 buck LED driver from Diodes Incorporated has been purpose designed to reduce EMI issues in the lower cost MR16 LED lamp market. To achieve required higher output powers, the driver can operate at input voltages between 6V to 30V and provide up to 8 series connected LEDs with a constant 1A current. The driver's current accuracy of 5%, means it will meet the requirements of most general low voltage lighting applications and lead to an improvement in inter-lamp luminance matching in 3W LED lighting systems. The driver is up to 96% efficient and its output current is simple to set using a single external resistor. Dimming control is via the application of either a DC voltage or PWM signal on the driver's Control input, which also protects against any over-driving of the LED current. The AL8807's 1000:1 PWM dimming ratio and dc dimming range from 16% to 100%, provide users with flexible and wide-ranging lamp brightness control. Provided in the small footprint SOT25 package and soon available in the MSOP-8EP package, the AL8807 low EMI LED driver is priced at $0.40 USD in 1k quantities. Further information available at www.diodes.com About Diodes Incorporated Diodes Incorporated (Nasdaq: DIOD), a Standard and Poor's SmallCap 600 and Russell 3000 Index company, is a leading global manufacturer and supplier of high-quality application specific standard products within the broad discrete, logic, and analog semiconductor markets. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets. Diodes' products include diodes, rectifiers, transistors, MOSFETs, protection devices, functional specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors; power management devices, including LED drivers, DC-DC switching and linear voltage regulators, and voltage references along with special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers. The Company's corporate headquarters, logistics center, and Americas' sales office are located in Plano, Texas. Design, marketing, and engineering centers are located in Plano; San Jose, California; Taipei, Taiwan; Manchester, England; and Neuhaus, Germany. The Company's wafer fabrication facilities are located in Kansas City, Missouri and Manchester, with two manufacturing facilities located in Shanghai, China, another in Neuhaus, and a joint venture facility located in Chengdu, China. Additional engineering, sales, warehouse, and logistics offices are located in Taipei; Hong Kong; Manchester; and Munich, Germany; with support offices located throughout the world. For further information, including SEC filings, visit the Company's website at www.diodes.com

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