ZXLD381FHTA【PDF 1/9 页】IC LED DRIVR WHITE BCKLT SOT23-3

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A Product Line of

Diodes Incorporated

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 a low saturation resistance. This

ensures high efficiency, even for input voltages as low as 1V.

The IC can start up under full load and operates down to an input voltage of only 0.9V.

The ZXLD381 is offered in the space saving SOT23 package or in die form, offering an excellent cost vs performance solution

for single cell LED driving applications.

Features

Pin Assignments

85% Efficiency

User adjustable output current

Single cell operation (0.9V minimum)

Low saturation voltage switching transistor

SOT23-3 package

Available also in Die form

Simple Application circuit

SOT23-3

Application

(Top View)

LED flashlights and torches

LED backlights

White LED driver

Typical Application Circuit

V IN

V CC

V OUT

GND

ZXLD381

LED

ZXLD381

Document number: DS32188 Rev. 3 - 2

1 of 9

www.diodes.com

May 2010

? Diodes Incorporated

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