Diodes ZXLD381 Manual do Utilizador descarregar pdf

ZXLD381

Document number: DS32188 Rev. 3 - 2

1 of 9

www.diodes.com

May 2010

Product Line o

Diodes Incorporated

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

• 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

Application

• LED flashlights and torches

• LED backlights

• White LED driver

Pin Assignments

SOT23-3

(Top View)

Typical Application Circuit

LED

ZXLD381

GND

OUT

1 2 3 4 5 6 7 8 9

Resumo do Conteúdo

ZXLD381 ZXLD381 Document number: DS32188 Rev. 3 - 2 1 of 9 www.diodes.com May 2010 © Diodes Incorporated A Product Line ofDiodes IncorporatedSINGLE

Página 2 - Pin Description

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Página 3 - Absolute Maximum Ratings

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Página 4 - Device Description

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Página 5 - Typical Characteristics

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Página 6

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Página 7 - Application Examples

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Página 8 - Ordering Information

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Página 9

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