ZXLD381 Datasheet (Zetex) - Single or Multi Cell LED Driver Solution

ZXLD381, Single or Multi Cell LED Driver Solution

The ZXLD381 is a simple PFM, DC-DC controller combined with a high performance internal switching transistor, enabling the production of a high efficiency boost converter for use in single cell applications.

A block diagram is shown for the ZXLD381 in Fig 1.

VCC L1 ZXLD 381 VOU T Pulse Cont rol 1.

www.DataSheet4U.com ZXLD381 Single or Multi Cell LED Driver Solution Summary The ZXLD381 is a single cell LED driver designed for applications where step-up voltage conversion from a very low input voltage is required.

These applications mainly operate from 1.5V or 1.2V cells.

The IC generates constant current pulses that are ideal for driving single or multiple LEDs over a wide range of operating voltages.

The ZXLD381 uses a PFM control technique to drive an internal switching transistor which

ZXLD381 Features

* 85% Efficiency User adjustable output current Single cell operation (0.9V minimum) Low saturation transistor SOT23-3 package Available also in Die form Simple Application circuit voltage switching Applications