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White LED Driver Lights Up to 12 LEDs in Series

Thu, 04/22/2010 - 10:01am
AOZ1950Alpha & Omega Semiconductor, Inc. (AOS) expands its EZBoost family with their first white LED backlight driver, the AOZ1950. The AOZ1950 is designed and optimized for providing backlighting solutions for the latest portable devices using medium-sized LCD panels such as netbooks, portable media players, and portable navigation devices.

The AOZ1950 is a high-performance current-mode boost regulator that operates from an input voltage range of 2.7V to 5.5V. Its integrated AOS Trench MOSFET boost switch allows the device to generate a regulated output voltage as high as 55V with an input switch current of 750mA. The high voltage and low on-resistance boost switch allows the AOZ1950 to power up to 12 LEDs in series. In addition, the AOZ1950 integrates several system safety features such as output over-voltage protection, a “true-off” input switch, short-circuit protection, and a cycle-by-cycle current limit.

“The AOZ1950 is an ideal LED driver solution for medium-sized LCD panels. The integrated Trench MOSFET boost switch delivers a higher output voltage than competing devices, allowing 20% more LEDs to be driven for bigger and brighter panels,” said Alan Moore, Marketing Manager for AOS’ Power IC products. “Additionally, the device’s integrated protection features allow for a more robust system design while at the same time reducing overall external component count.”

Pricing and Availability
The AOZ1950 is available in a 10-pin 3mm x 3mm DFN package and operates over the -40°C to +85°C ambient temperature range. Pricing in 1,000 piece quantities begins at US$1.20.

About AOS
Alpha & Omega Semiconductor, Inc. is a fabless semiconductor company that develops leading-edge analog power management solutions. AOS offers a wide portfolio of Power MOSFET, Power IC, Analog Switch and Transient Voltage Suppressor products that incorporate advances in device design, silicon, and packaging technologies. AOS’ products meet the ever increasing performance and power efficiency requirements in computing and consumer applications such as portable and desktop computers, digital cameras, cell phones, and LCD TVs. AOS has offices worldwide including the United States, China, Hong Kong, Taiwan, and South Korea. For more information, please visit www.aosmd.com.

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