Charge Pump White LED Driver
Allegro MicroSystems’ high-efficiency charge-pump white LED driver offers a white LED driver solution for portable electronics display applications. Using a proprietary control scheme (1x, 1.5x), this LED driver can output well-matched LED currents for up to four channels, while maintaining the highest efficiency over most of the Li-Ion battery lifetime. The A8435 accepts an input range of 2.7 to 5.5 V and delivers up to 30 mA for each of the four regulated current sources. The A8435 can deliver a total output current of 120 mA, meeting the requirements of most Li-Ion battery-powered white LED backlight applications. Outputs can also be combined for WLED flash/torch applications.
Allegro MicroSystems, Inc.