ADP8140 PDF даташит
Спецификация ADP8140 изготовлена «Analog Devices» и имеет функцию, называемую «4-Channel High Current LED Driver». |
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Детали детали
Номер произв | ADP8140 |
Описание | 4-Channel High Current LED Driver |
Производители | Analog Devices |
логотип |
24 Pages
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Data Sheet
4-Channel High Current LED Driver with
Adaptable Power Control
ADP8140
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
Operates from VIN of 3 V to 30 V; higher voltages easily
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
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
Rev. 0
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TYPICAL APPLICATION CIRCUITS
VCC
NTC
ENABLE
FAULT
ADP8140
VIN MIN
REG
VT
MODE
DIM
EN SINK1
FAULT SINK2
FB_OUT SINK3
COMP SINK4
ISET VO_SNS
EXPOSED PAD
Figure 1. ADP8140 Used with Shunt Regulator
AGND VCC BST
FB VIN
ADP2441 BUCK
REGULATOR
COMP
SW
EN PGND
PGOOD FREQ SS
ADP8140
VIN MIN
REG
VT
MODE
DIM
EN SINK1
FAULT SINK2
FB_OUT SINK3
COMP SINK4
ISET VO_SNS
EXPOSED PAD
VIN
Figure 2. ADP8140 Used with Buck
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).
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
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ADP8140* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
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DOCUMENTATION
Data Sheet
• ADP8140: 4 Channel High Current LED Driver with
Adaptable Power Control Data Sheet
DESIGN RESOURCES
• ADP8140 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
DISCUSSIONS
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SAMPLE AND BUY
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TECHNICAL SUPPORT
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number.
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ADP8140
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Typical Application CircuitS ........................................................... 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 6
Maximum Temperature Ranges ................................................. 6
Thermal Resistance ...................................................................... 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
Typical Performance Characteristics ............................................. 8
Theory of Operation ...................................................................... 11
Start-Up Sequence...................................................................... 11
Current Sinks .............................................................................. 12
Power Control Operation.......................................................... 12
REVISION HISTORY
2/15—Revision 0: Initial Version
Data Sheet
MODE Pin Operation................................................................ 13
Power Control Modes................................................................ 13
Dimming the LED Current....................................................... 14
Reducing the LED Current with the DIM Pin ....................... 15
Dimming LEDs with the VT Pin ............................................. 15
Fault Protections......................................................................... 15
LED Open-Circuit and Short-Circuit Protection .................. 16
Die Temperature Protection ..................................................... 17
Using Multiple ADP8140 ICs ................................................... 17
Operating the ADP8140 from Higher Input Voltages .......... 18
Effect of LED VF Mismatch....................................................... 18
Managing the Power Dissipation of the ADP8140 ................ 19
Layout Guidelines....................................................................... 19
Ordering Options ....................................................................... 19
Outline Dimensions ....................................................................... 23
Ordering Guide .......................................................................... 23
Rev. 0 | Page 2 of 23
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ADP8140 | 4-Channel High Current LED Driver | Analog Devices |
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