ZXLD1352

ZXLD1352

Document number: DS33469 Rev. 3 - 2

1 of 21

www.diodes.com

December 2010

© Diodes Incorporated

A Product Line of

Diodes Incorporated

30V 350mA LED DRIVER WITH 1000:1 PWM DIMMING AND AEC-Q100

Description

The ZXLD1352 is a continuous mode inductive step-down

converter with integrated switch and high side current sense.

It operates from an input supply from 7V to 30V driving

single

and

multiple

series

connected

LEDs

effciently

externally adjustable output current up to 350mA.

The ZXLD1352 has been qualified to AEC-Q100 Grade

2 allowing it to operate at ambient temperatures from -40 to

105°C.

DC voltage or a PWM waveform. 1000:1 adjustment of

output current is possible using PWM control. Applying a

voltage of 0.2V or lower to the ADJ pin turns the output off

and switches the device into a low current standby state.

Pin Assignments

Features

•

Simple low parts count

•

Single pin on/off and brightness control using DC voltage

or PWM

•

1000:1 PWM dimming range

•

High efficiency (up to 95%)

*

•

Wide input voltage range: 7V to 30V

•

40V transient capability

•

Up to 1MHz switching frequency

•

Typical 4% output current accuracy

•

Qualified to AEC-Q100 Grade 2

•

Available in Green molding (no Br, Sb) with lead free

finish/RoHS compliant

Applications

• Low voltage halogen replacement LEDs

• Automotive lighting

• Low voltage industrial lighting

• LED back-up lighting

• Illuminated signs

Typical Application Circuit

* Using standard external components as specified under electrical characteristics. Efficiency is dependent upon the number of LEDs driven and on external

component types and values.

I

SENSE

V

IN

ADJ

GND

LX

TSOT23-5

Top View

V

IN

I

SENSE

LX

GND

ZXLD1352

ADJ

(12V - 30V)

Rs

0.33

1µF

C1

GND

D1

ZLLS1000

47mH

L1

PW M