ZXLD1374EST20TC【PDF 1/39 页】IC LED DVR BUCK BOOST 20TSSOP

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A Product Line of

Diodes Incorporated

ZXLD1374

60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST

LED DRIVER CONVERTER WITH AEC-Q100

Description

The ZXLD1374 is a 60V LED driver with integrated 1.5A low side

Pin Assignments

switch to drive high current LEDs. It is a multi-topology converter

ADJ

enabling it to operate in Buck, Boost and Buck-boost configurations;

efficiently controlling the current of up to 16-series connected LEDs.

The ZXLD1374 is a modified hysteretic converter using a patent

pending control scheme providing high output current accuracy in all

three topologies. High accuracy dimming is achieved through

DC control and high frequency PWM control.

The ZXLD1374 uses two pins for fault diagnosis. A flag output

highlights a fault, while the multi-level status pin gives further

information on the exact fault.

The ZXLD1374 has been qualified to AEC-Q100 Grade 1 enabling

operation in ambient temperatures from -40 to +125°C .

REF 2

TADJ 3

SHP 4

STATUS 5

SGND 6

PGND 7

PGND 8

N/C 9

N/C 10

Thermal

Pad

PWM

FLAG

ISM

VIN

VAUX

N/C

Features

0.5% Typical Output Current Accuracy

6.3 to 60V Operating Voltage Range

1.5A Integrated Low Side Switch

LED Driver Supports Buck, Boost and Buck-Boost Topologies

Wide Dynamic Range Dimming

20:1 DC Dimming

1000:1 Dimming Range at 500Hz

Up to 1MHz Switching

High Temperature Control of LED Current Using TADJ

AEC-Q100 Grade 1

TSSOP-20EP: Available in “Green” Molding Compound (No Br,

Sb) with lead Free Finish/ RoHS Compliant

Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

Halogen and Antimony Free. “Green” Device (Note 3)

Notes:

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen and Antimony free, "Green" and Lead-Free.

3. Halogen and Antimony free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl)

and <1000ppm antimony compounds.

Typical Applications Circuit

V IN

VAUX VIN

PWM

ISM

SD1

PSD3200

REF

TADJ

RGI2

ADJ ZXLD1374 LX

FLAG

STATUS

SHP NC SGND PGND

C OUT

GND

RGI2 TH1

100pF

ZXLD1374

Document number: DS35032 Rev. 3 - 2

1 of 39

www.diodes.com

September 2012

? Diodes Incorporated

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