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WLED Driver with 1~2 Cells Input
LD7291
5/31/2007
REV: 00a
General Description
The LD7291 is a high efficiency WLED driver to drive maximum 3 WLEDs from single or 2 battery cells. By using the proprietary topology, the LD7291 can operate under as low as 0.85V to fully utilize the energy of battery.
The LD7291 only needs 4 external passive components to provide the solution for driving maximum 3 WLEDs in a very small PCB size. Furthermore, the 3 WLEDs can achieve very good current matching without any extra current /brightness control circuit. All the above functions are integrated in a tiny SOT-26 package. The LD7291 is the ideal solution for battery-powered LED driving applications.
Features
z Very few external components z Low ripple and low noise z Low start-up voltage, 0.
LD7291 Datasheet
