ZXLD1371Q

ZXLD1371Q

Document number: DS37116 Rev. 1 - 2

1 of 42

www.diodes.com

September 2015

© Diodes Incorporated

ZXLD1371Q

AUTOMOTIVE GRADE 60V HIGH ACCURACY BUCK/

BOOST/BUCK-BOOST LED DRIVER-CONTROLLER

Description

The ZXLD1371Q is an LED driver controller IC for driving external

MOSFETs to drive high current LEDs. It is a multi-topology controller

enabling it to efficiently control the current through series connected

LEDs. The multi-topology enables it to operate in buck, boost and

buck-boost configurations.

The 60V capability coupled with its multi-topology capability enables it

to be used in a wide range of applications and drive in excess of 15

LEDs in series.

The ZXLD1371Q is a modified hysteretic controller using a patent

pending control scheme providing high output current accuracy in all

three modes of operation. High accuracy dimming is achieved through

DC control and high frequency PWM control.

The ZXLD1371Q 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.

Grade supporting PPAPs.

Pin Assignments

Typical Application Circuit

Features



0.5% Typical Output Current Accuracy



5 to 60V Operating Voltage Range



LED Driver Supports Buck, Boost and Buck-Boost

Configurations



Wide Dynamic Range Dimming



10:1 DC Dimming



1000:1 Dimming Range at 500Hz



Up to 1MHz Switching





Available in Thermally Enhanced TSSOP-16EP Package with

Green Molding Compound



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



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



Automotive Grade



Qualified to AEC-Q100 Grade 1 and TS16949 Certification



PPAP Capable (Note 4)

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/quality/lead_free.html for more in

formation 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.

4. Automotive products are AEC-Q100 qualified and are PPAP capable. Automotive, AEC-Q100 and standard products are electrically and

thermally the same, except where specified. For more information, please refer to http://www.diodes.com/quality/product_compliance_definitions/.

ADJ

REF

TADJ

SHP

STATUS

SGND

PGND

N/C

GI

PWM

FLAG

ISM

VIN

VAUX

GATE

N/C

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

TSSOP-16EP

C2

330pF

ZXLD1371

L1

33µH

TH1

10k

R4

1.8k

RGI2

75k

RGI1

24k

C1

10µF

C

OUT

10µF

D1

PDS3100

Q1

DMN6068LK3

R1

0R05

PWM

VAUX VIN

ISM

GI

ADJ

REF

TADJ

SHP

SGND PGND

GATE

FLAG

STATUS

NC

Thermally connected

VIN 8V to 22V

1 to 6

LEDs

ILED = 1A