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High-Performance Power ICs and Hall-Effect Sensors
Allegro® Microsystems, Inc. Announces New Six-Channel
Charge Pump White LED Driver
A Simple, Low-Cost White LED Driver Solution 
Worcester, MA, December 22, 2006 — Allegro® announces a new high efficiency charge pump IC that offers a simple, low-cost white LED (WLED) driver solution for driving up to six WLEDs in various application configurations. All six WLEDs could be backlighting a single display, or used with multiple displays; for example, four WLEDs for a main display and the other two WLEDs backlighting a sub display or a low-current flash/torch.
Using a proprietary control scheme (1×, 1.5×, and 2×), the A8434 can deliver well-matched WLED current while maintaining the highest efficiency and low EMI. The WLED current is regulated over the entire range of Li+ battery voltage to provide uniform intensity. WLED brightness and on/off can be controlled for the six channels, either all together or independently as main display and sub display/torch, through 2 single-wire serial interface pins.
Allegro’s A8434 is available in a 16L QFN space-conserving (3 × 3 mm footprint) ES package.
About Allegro
Allegro MicroSystems, Inc. is a global leader in the development, manufacture and marketing of high-performance power integrated circuits and integrated Hall-effect magnetic sensors. Allegro’s innovative, system-level solutions serve high-growth applications within the automotive, computer/office automation, industrial, consumer and communications markets. With more than 2,500 employees, Allegro is headquartered in Worcester, MA. Further information about Allegro can be found at www.allegromicro.com.
Editorial Contact:
Stephanie Fennelly
Director – Marketing Communications
Tel: (508) 854-5363
sfennelly@allegromicro.com