ZXLD1101 datasheet(1/16 Pages) DIODES

Part #	ZXLD1101

Description	ADJUSTABLE LED DRIVER WITH INTERNAL SWITCH IN TSOT23-5

PDF	16 Pages

Scroll/Zoom	100%

Manufacturer	DIODES [Diodes Incorporated]

Direct Link	http://www.diodes.com

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SEMICO NDUC TORS

DESCRIPTION

The ZXLD1101 is a PFM inductive boost converter

designed for driving 2, 3 or 4 series connected white

LEDs from a Li-Ion cell and up to 8 LEDs from a 5V

supply. The device operates from an input supply of

between 2.5V and 5.5V and provides an adjustable

output current of up to 50mA.

The ZXLD1101 includes the output switch and peak

current sense resistor, and can operate with a

maximum output voltage of 28V.

Quiescent current is typically 60 A and a shutdown

function is provided to reduce this current to less than

500nA in the 'off' state.

ADVANCED FEATURES

• True Analog Dimming via PWM

FEATURES

• 1mm height profile TSOT23-5 pin package

• Internal PWM filter for flicker free output

• High efficiency (80% typ)

• Wide input voltage range: 2.5V to 5.5V

• Up to 50mA output current

• Low quiescent current: (60 A typ)

• 500nA maximum shutdown current

• Up to 1MHz switching frequency

• Low external component count

• Inherently matched LED currents

Output current can be adjusted by applying a PWM

control signal to the 'Enable' pin. Depending upon the

control frequency, this will provide either a continuous

or a 'chopped' output current. The PWM filter

components are contained within the chip.

The device is assembled in the TSOT23-5 pin package

with 1mm maximum height profile.

APPLICATIONS

• Mobile phones

• Digital cameras

• PDAs

• LCD modules

• Portable internet appliances

• Palmtop computers

ZXLD1101

ISSUE 4 - JULY 2004

ADJUSTABLE LED DRIVER WITH INTERNAL SWITCH IN TSOT23-5

PIN CONNECTIONS

TYPICAL APPLICATION CIRCUIT

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ZXLD1101 Datasheet(PDF) 1 Page - Diodes Incorporated

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