Power Management Inductorless (Charge Pump) DC/DC Converters Inductorless (Charge Pump) LED Drivers

LTC2991 - Octal I2C Voltage, Current, and Temperature Monitor

LTC4311 - Low Voltage I2C/SMBus Accelerator

LTC3208 - High Current Software Configurable Multidisplay LED Controller

Features

  • 1x/1.5x/2x Charge Pump Provides Up to 95% Efficiency
  • Up to 1A Total Output Current
  • 17 Current Sources Available as MAIN, SUB, RGB, CAM and AUX LED Drivers
  • LED ON/OFF, Brightness Level and Display Configuration Programmable Using 2-Wire I2C™ Interface
  • Low Noise Constant Frequency Operation with Flying Capacitor Edge Rate Control
  • Automatic Charge Pump Mode Switching
  • Internal Soft-Start Limits Inrush Current During
  • Startup and Mode Switching
  • Open/Shorted LED Protection
  • Short-Circuit/Thermal Protection
  • 256 Brightness States for MAIN and SUB Displays
  • 4096 Color Combinations for the RGB Display
  • 5mm × 5mm 32-Lead QFN Plastic Package

Typical Application

LTC3208 Typical Application
LTC3208 Typical Application

Description

The LTC3208 is a highly integrated multidisplay LED controller. The part contains a 1A high effi ciency, low noise charge pump to provide power to the MAIN, SUB, RGB, CAM and AUX LED displays. The LTC3208 requires only 4 small ceramic capacitors and one current set resistor to form a complete LED power supply and current controller.

The maximum display currents are set by a single external resistor. Current for each LED is controlled by a precision internal current source. Dimming and On/Off for all displays is achieved via the I2C serial interface.  256 brightness levels are available for the MAIN and SUB displays. 16 levels are available for the RGB and CAM displays. Four AUX current sources can be independently assigned via the I2C port to the CAM, SUB, MAIN or AUX DAC controlled displays.

The LTC3208 charge pump optimizes effi ciency based on the voltage across the LED current sources. The part powers up in 1x mode and will automatically switch to boost mode whenever any enabled LED current source begins to enter dropout. The fi rst dropout switches the part into 1.5x mode and a subsequent dropout switches the LTC3208 into 2x mode. The part is available in a small 5mm × 5mm 32-lead QFN package.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing		 RoHS
LTC3208EUH#PBF 5x5 QFN-32 UH E 05-08-1693 Yes
LTC3208EUH#TRPBF 5x5 QFN-32 UH E 05-08-1693 Yes


LTC3208 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LTC3208EUH#PBF 5x5 QFN-32 E $3.64 $2.55 Yes
LTC3208EUH#TRPBF 5x5 QFN-32 E $2.65 Yes
Buy Now • Request Samples
* 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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC824A LTC3208 Demo Board | High Current I2C LED Driver Contact Factory
Buy Now

Companion Boards

Part Number Description Price Documentation
DC590B Isolated USB Serial Controller for Linear Technology QuikEval-Compatible Demo Boards $50.00
Buy Now
Click here to view our complete list of demo boards

Applications

  • Video/Camera Phones with QVGA + Displays

People Who Viewed This Product Also Viewed

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

Technical Support