ADD5211: Four-String, White LED Driver for LCD Backlight Applications

ADD5211 Data Sheet Rev PrA, 02/2013 (pdf 160kB)

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Product Details

Model	Package	Price* (100-499)	Price* 1000 pcs
ADD5211ACPZ-R7 Status: Pre-Release	LFCSP:LEADFRM CHIP SCALE	-	-
ADD5211ACPZ-RL Status: Pre-Release	LFCSP:LEADFRM CHIP SCALE	-	-

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.

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.

APPLICATIONS

LCD monitor and TV LED backlights
Industrial lighting

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FEATURES and BENEFITS

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
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
See datasheet for additional features

Documentation

Title	Content Type	File Type
ADD5211: Four-String, White LED Driver for LCD Backlight Applications Preliminary Data Sheet (Rev PrA, 02/2013) (pdf, 160 kB)	Data Sheets	PDF
Glossary of EE Terms	Glossary	HTML

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Model	Package	Pins	Temp. Range	Packing, Qty	Price*(100-499)	Price*1000 pcs	RoHS	View PCN/ PDN	Check Inventory/ Purchase/Sample
ADD5211ACPZ-R7 Status: Pre-Release	LFCSP:LEADFRM CHIP SCALE	24	Ind	Reel, 1500	-	-	Y Material Info	Notify Me	Contact ADI
ADD5211ACPZ-RL Status: Pre-Release	LFCSP:LEADFRM CHIP SCALE	24	Ind	Reel	-	-	Y Material Info	Notify Me	Contact ADI

Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.