Datasheet > ADD5211ACPZ-RL

ADD5211ACPZ-RL

更新时间： 2024-02-10 20:16:35

品牌	Logo	应用领域
亚德诺 - ADI		驱动器
页数	文件大小	规格书
6页	167K
描述
Four-String, White LED Driver for LCD Backlight Applications

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中文翻译

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数据手册
替代型号

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ADD5211ACPZ-RL 数据手册

Four-String, White LED Driver

for LCD Backlight Applications

Preliminary Technical Data

ADD5211

FEATURES

GENERAL DESCRIPTION

White LED driver based on an inductive boost controller

Wide input voltage range: 4.5 V to 40 V

Adaptive output voltage to minimize power dissipation

Adjustable operating frequency: 200 kHz to 1.2 MHz

Programmable UVLO

Programmable soft start time for boost converter

Programmable external MOSFET switching rising/falling time

Drives up to 4 LED current sinks with internal MOSFETs

Brightness control with PWM input

Adjustable LED current: 40 mA up to 200 mA

Headroom control to maximize efficiency

LED dimming frequency: up to 25 kHz

1000:1 PWM dimming at 300 Hz

The ADD5211 is a 4 channel, white LED driver for backlight

applications based on high efficiency, current mode, step-up

converter technology. The boost controller drives an external

MOSFET switch for step-up regulation from an input voltage of

4.5 V to 40 V and a pin adjustable operating frequency between

200 kHz and 1.2 MHz. An adjustable UVLO function is

implemented to reduce input current during power-off.

The ADD5211 contains four regulated current sinks for uniform

brightness intensity. Each current sinks can be driven from 40

mA up to 200 mA and the LED driving current is pin adjustable

by an external resistor. The ADD5211 with an input PWM

interface drives up to four parallel strings of multiple series

connected LEDs with 1.5% current matching between strings.

Open drain fault indicator

Additional features include fault indicator output LED short

protection, LED open protection, boost output short protection,

overvoltage protection, cycle-by-cycle current limit, and

thermal shutdown for both the IC and LED array. The

programmable soft start is implemented to reduce inrush

current during startup.

LED open and LED short fault protection

Thermal shutdown

Undervoltage lockout

24-lead, 4 mm × 4 mm LFCSP

APPLICATIONS

LCD monitor and TV LED backlights

Industrial lighting

TYPICAL APPLICATION

VIN

UVLO

VDR

VIN GATE_P GATE_N

RAMP

PGND

OFF ON

PWM

ADD5211

OVP

FAULT

VDD

FB4

FB3

FB2

LSD

FB1

ISET

LGND

AGND FREQ COMP

Figure 1.

Rev. PrA

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

rightsof third parties that may result fromits 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 andregisteredtrademarks are the property of their respective owners.

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

Tel: 781.329.4700

Technical Support

www.analog.com

12 3 4 5 6

中文翻译

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ADD5211ACPZ-RL 替代型号

型号	品牌	替代类型	描述	数据表
ADD5211ACPZ-R7	ADI	类似代替	Four-String, White LED Driver for LCD Backlight Applications

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