Charge Pump IC drives WLEDs for backlight and flash/torch.
Press Release Summary:
Supplied in 3.0 x 3.0 x 0.75 mm MLP-16 package, A8530 can drive 4 display backlight and 2 flash/torch/video mode white LEDs (WLEDs). Control scheme (1x, 1.5x, and 2x) allows for delivery of well-matched LED current, regulated over entire range of Li+ battery voltage to provide uniform intensity. Each backlight channel can be driven with up to 30 mA, while each flash/torch channel can be driven with up to 100 mA each. Channels may be tied together for operational flexibility.
Original Press Release:
Allegro Announces a New High-Efficiency Charge Pump White LED Driver for Display Backlight and Flash/Torch
Six Channels, Small Package, High Efficiency for Extended Battery Life
Worcester, MA, October 23, 2006 - Allegro announces 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 (1×, 1.5×, and 2×), Allegro's 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 × 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. For more information on this part, please access Allegro's A8530 datasheet at www.allegromicro.com/sf/8530.
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, while our leading-edge product and processes reinforce our expertise in motor driver and power management technology. In addition, we also hold leading positions within printer, scanner, copier and portable device (e.g. cellular phones) applications. With more than 2,400 employees, Allegro is headquartered in Worcester, MA. Further information about Allegro can be found at www.allegromicro.com.
