4-Channel High Current LED Driver with

Adaptable Power Control

Data Sheet

ADP8140

Rev. B

Document Feedback

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patents orother

rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

©2015–2020 Analog Devices, Inc. All rights reserved.

Technical Support

www.analog.com

FEATURES

Highly integrated feature set for a high brightness LED

driver solution with minimal external components

4 current sink channels with an adjustable current from

125 μA to 500 mA

Analog and pulse-width modulation (PWM) dimming inputs

Analog and PWM LED current outputs

2% (maximum) matching between LED channels

5% (maximum) LED current accuracy

accomplished with an external Zener diode

Operates with LED anode supply voltages up to 100 V dc

Feedback output controls external power source for optimal

efficiency and safety

Multiple ADP8140 IC operation in parallel to control one

power supply

Integrated error amplifier for secondary side control of

isolated power supplies

Easy connection of a temperature thermistor or light sensor

Provides robust protection of the entire system

Power supply overvoltage protection

LED overtemperature protection

LED short-circuit protection

LED open-circuit protection

IC overtemperature protection

Shorted ISET protection

Open ISET and EN protection

Standby mode for low current consumption

Fault indicator output

Small, thermally enhanced, LFCSP package (4 mm × 4 mm)

APPLICATIONS

High brightness LED lighting

Large format LED backlighting

TYPICAL APPLICATION CIRCUITS

Figure 1. ADP8140 Used with Shunt Regulator

Figure 2. ADP8140 Used with Buck

GENERAL DESCRIPTION

The ADP8140 provides high current control of up to four LED

drivers. Each driver can sink up to 500 mA. The sink current is

programmed for all four drivers with one external resistor.

The device features a feedback output that controls an external

power supply for optimal efficiency. The ADP8140 also protects

the LEDs, power supply, and itself against thermal events, short

circuits, overvoltages, and LED open circuits. Multiple

ADP8140 ICs are easily connected in parallel to drive additional

LED strings or higher current LEDs. The ADP8140 is available

in a small, thermally enhanced, lead frame chip scale package

(LFCSP).

ADP8140

FAULT

NTC

ENABLE

VIN

COMP

REG

MODE

EN

FAULT

FB_OUT

MIN

VT

DIM

SINK1

SINK2

SINK3

SINK4

ISET

VO_SNS

EXPOSED PAD

VCC

VIN

ADP2441 BUCK

REGULATOR

VIN

SS

EN

PGND

SW

FREQ

PGOOD

FB

COMP

AGND VCC

BST

ADP8140

VIN

COMP

REG

MODE

EN

FAULT

FB_OUT

MIN

VT

DIM

SINK1

SINK2

SINK3

SINK4

ISET

VO_SNS

EXPOSED PAD