Datasheet > ADP8140

ADP8140

更新时间： 2024-11-30 14:57:47

品牌	Logo	应用领域
亚德诺 - ADI		驱动功率控制驱动器
页数	文件大小	规格书
23页	538K
描述
具有自适应功率控制功能的 4 通道高电流 LED 驱动器

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中文翻译

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数据手册

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ADP8140 数据手册

4-Channel High Current LED Driver with

Adaptable Power Control

Data Sheet

ADP8140

FEATURES

TYPICAL APPLICATION CIRCUITS

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 V_INof 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

VCC

NTC

ADP8140

VIN

MIN

REG

MODE

DIM

ENABLE

FAULT

SINK1

SINK2

FAULT

Multiple ADP8140 IC operation in parallel to control one

power supply

Integrated error amplifier for secondary side control of

isolated power supplies

FB_OUT SINK3

COMP

ISET

SINK4

VO_SNS

EXPOSED PAD

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

Figure 1. ADP8140 Used with Shunt Regulator

AGND VCC BST

VIN

ADP2441 BUCK

REGULATOR

IC overtemperature protection

COMP

Shorted ISET protection

PGND

Open ISET and EN protection

PGOOD FREQ

Standby mode for low current consumption

Fault indicator output

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

ADP8140

VIN

MIN

REG

APPLICATIONS

MODE

DIM

High brightness LED lighting

Large format LED backlighting

SINK1

SINK2

FAULT

FB_OUT SINK3

COMP

ISET

SINK4

VO_SNS

EXPOSED PAD

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.

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).

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. B

Document Feedback

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

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

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

Trademarks and registeredtrademarks arethe property of their respective owners.

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

Technical Support

www.analog.com

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中文翻译

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