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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 leader in developing, manufacturing and marketing high-performance power and Hall-effect sensor integrated circuits. Allegro's innovative solutions serve high-growth applications within the automotive, communications, computer/office automation, consumer and industrial markets. Allegro is headquartered in Worcester, Massachusetts (USA) with design and applications centers located in North and South America, Asia, and Europe. 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