Allegro Introduces New Charge Pump White LED Driver

Allegro Microsystems Inc. announced a new high efficiency charge pump IC that offers a simple, low-cost white LED driver solution for driving four display backlight and two flash/torch/video mode white LEDs. Using a proprietary control scheme (1x, 1.5x, and 2x), Allegro claims its A8530 can deliver well-matched LED current while maintaining the highest efficiency and low EMI. The LED current is regulated over the entire range of Li+ battery voltage to provide uniform intensity.

The four WLED backlight channels can be driven with up to 30mA each, while the two flash torch can be driven with up to 100mA each. Channels can also be tied together for application flexibility, with a total output current of up to 320mA continuous. LED brightness and on/off can be controlled for four display backlight LEDs and two flash/torch LEDs through single-wire serial interface pins.

The A8530 is available in a very thin profile (0.75 mm nominal height) 3.0 mm x 3.0 mm MLP-16 package. It is priced at $0.68 in quantities of 5,000 and has a 10-12 week lead-time to market.