LTC3209 - 600mA Main/Camera LED Controller
Features
- Multimode Charge Pump Provides Up to 94% Efficiency (1x, 1.5x, 2x)
- Up to 600mA Total Output Current
- LTC3209-1: 8 Current Sources Available as 6 × 25mA MAIN, 1 × 400mA CAM and 1 × 15mA AUX
- LTC3209-2: 8 Current Sources Available as 5 × 25mA MAIN, 2 × 200mA CAM and 1 × 15mA AUX
- LED On/Off and Brightness Level Programmable Using 2-Wire I2CTM Interface
- Automatic Charge Pump Mode Switching or Fixed Mode for Power Supply Generation
- Low Noise Constant Frequency Operation*
- Internal Soft-Start Limits Inrush Current During Start-up and Mode Switching
- Short Circuit/Thermal/Open-Shorted LED Protection
- 256 Brightness States for MAIN Display
- 16 Brightness States for CAM Display
- 4 Brightness States for AUX Display
- 20-Lead (4mm × 4mm) QFN Package
Typical Application
Description
The LTC3209-1/LTC3209-2 are highly integrated multidisplay LED controllers. These parts contain a high efficiency, low noise charge pump to provide power to MAIN, CAM and AUX LED displays. The LTC3209-1/ LTC3209-2 require only four 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 states are available for the MAIN display. Sixteen states are available for the CAM display and four states are available for the AUX display.
The charge pump optimizes efficiency 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 MAIN or CAM LED current source begins to enter dropout. The first dropout switches the part into 1.5x mode and a subsequent dropout switches the part into 2x mode. The part resets to 1x mode whenever a data bit is updated via the I2C port. The parts are available in a 4mm × 4mm 20-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 |
|---|---|---|---|---|---|
| LTC3209EUF-1#PBF | 4x4 QFN-20 | UF | E | 05-08-1710 | Yes |
| LTC3209EUF-1#TRPBF | 4x4 QFN-20 | UF | E | 05-08-1710 | Yes |
| LTC3209EUF-2#PBF | 4x4 QFN-20 | UF | E | 05-08-1710 | Yes |
| LTC3209EUF-2#TRPBF | 4x4 QFN-20 | UF | E | 05-08-1710 | Yes |
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 | |
|---|---|---|---|---|---|---|
| LTC3209EUF-1#PBF | 4x4 QFN-20 | E | $2.57 | $1.80 | Yes | |
| LTC3209EUF-1#TRPBF | 4x4 QFN-20 | E | $1.86 | Yes | ||
| LTC3209EUF-2#PBF | 4x4 QFN-20 | E | $2.57 | $1.80 | Yes | |
| LTC3209EUF-2#TRPBF | 4x4 QFN-20 | E | $1.86 | Yes | ||
| Buy Now • Request Samples | ||||||
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 |
|---|---|---|---|
| DC880A | LTC3209EUF-2 Demo Board | $100.00 | |
| DC881A | LTC3209EUF-1 Demo Board | $100.00 | |
| 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 | |||
Applications
- Video/Camera Phones with QVGA+ Displays
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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:
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Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
