ADD5211

NOT RECOMMENDED FOR NEW DESIGNS

Four-String, White LED Driver for LCD Backlight Applications

Data Sheet (Rev. A) Product Selection Table

Part Models: 2
1ku List Price: price unavailable

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Overview

White LED driver based on an inductive boost controller
- Wide input voltage range: 4.5V 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 to 200 mA
- Headroom control to maximize efficiency
- LED dimming frequency: up to 25 kHz
- PWM dimming at 300 Hz: 1000:1
Open-drain fault indicator
LED open and LED short fault protection
Thermal shutdown
Undervoltage lockout (UVLO)
24-lead, 4 mm × 4 mm LFCSP

The ADD5211 is a four-string, 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 from 200 kHz to 1.2 MHz. An adjustable UVLO function is implemented to reduce input current during power-off.

The ADD5211 provides four regulated current sinks for uniform brightness intensity. Each current sink can be driven from 40 mA to 200 mA; the LED driving current is pin adjustable using an external resistor. With an input PWM interface, the ADD5211 drives up to four parallel strings of multiple series connected LEDs.

Additional features include 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 the LED array. An open-drain fault output is also included. A programmable soft start is implemented to reduce inrush current during startup.

Applications

LCD monitor and TV LED backlights
Industrial lighting

Part Models: 2
1ku List Price: price unavailable

Documentation

Data Sheet 1

ADD5211: Four-String, White LED Driver for LCD Backlight Applications Data Sheet (Rev.A) 02/21/2013

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADD5211ACPZ-R7	24-Lead LFCSP (4mm x 4mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADD5211ACPZ-RL	24-Lead LFCSP (4mm x 4mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 6, 2017 - 16_0234 Assembly Transfer to ASE Korea and Test Transfer to STATS ChipPAC Singapore of Select LFCSP Parts.
		PCN16_0234_Form Material_Report Detailed Change Description Detailed Change Description Qualification Results Summary Test Correlation Report
ADD5211ACPZ-R7	Obsolete
ADD5211ACPZ-RL	Obsolete
Aug 6, 2014 - 13_0230 Assembly and Test Transfer of Select 3.5x3.5, 4x3, 4x4, and 5x5mm LFCSP Products to STATS ChipPAC China
		PCN13_0230_Form Material_Report Detailed Change Description Qualification Results Summary Test Correlation Report
ADD5211ACPZ-R7	Obsolete
ADD5211ACPZ-RL	Obsolete
Feb 6, 2024 - 24_0005 Discontinuance of ADD5211
		PDN24_0005_Form Material_Report
ADD5211ACPZ-R7	Obsolete
ADD5211ACPZ-RL	Obsolete