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LED drivers eases single-cell apps design

Posted: 14 May 2010 ?? ?Print Version ?Bookmark and Share

Keywords:LED driver? solar? single-cell battery?

ZXLD381 LED driver

Diodes Inc. has developed ZXLD381 and ZXLD383 LED drivers designed to provide the simplest possible solution for driving low-power, high-brightness LEDs from a single solar or rechargeable battery cell. PFM DC/DC converters with an on-board low saturation voltage switching transistor, the devices only need an inductor for high efficiency LED illumination.

Operating from an input voltage as low as 0.9V and delivering up to 80mA, they generate a constant current for driving single or multiple LEDs, determined by the external inductor value. Offering efficiencies as high as 93%, these drivers help extend battery life in a wide range of illumination applications.

The ZXLD383 combines the features of the ZXLD381 with a dual function enable input which provides an inhibit control and an ultralow voltage drop isolation diode for battery charging purposes in garden lights. This eliminates the need for an external photocell array isolation diode, making the driver ideal for solar powered garden and walkway lamps.

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