driver for 12 LEDsAlpha & Omega Semiconductor, Inc. (AOS) expanded 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. This current-mode boost regulator operates from an input voltage range of 2.7 V to 5.5 V. Its integrated AOS Trench MOSFET boost switch allows the device to generate a regulated output voltage as high as 55 V with an input switch current of 750 mA. 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.

Alpha & Omega Semiconductor, Inc.