LTC3205
LTC3205
PRODUCTIONMultidisplay LED Controller
- Part Models
- 2
- 1ku List Price
- Starting From $3.28
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Overview
- Step-Up/Step-Down Fractional Charge Pump for Up to 92% Efficiency
- Independent Current and Dimming Control for 1-4 LED Main, 1-2 LED Sub and RGB LED Displays
- LED Currents Programmable Using 3-Wire Serial Interface
- Up to 250mA of Continuous LED Current
- 0.7% LED Current Matching
- Low Noise Constant Frequency Operation
- Minimal Component Count
- Automatic Soft-Start Limits Inrush Current
- Four Programmable Dimming States for Main and Sub Displays
- Up to 4096 Color Combinations for RGB Display
- Low Shutdown Current: ICC < 1µA
- Tiny 24-Lead (4mm x 4mm) QFN Package
The LTC3205 is a highly integrated multidisplay LED controller. The part contains a high efficiency, low noise fractional step-up/step-down charge pump to provide power for both main and sub white LED displays plus an RGB color LED display. The LTC3205 requires only four small ceramic capacitors plus two resistors to form a complete 3-display LED power supply and current controller.
Maximum currents for the main/sub and RGB displays are set independently with a single resistor. Current for each LED is controlled with an internal current source. Dimming and ON/OFF control for all displays are achieved via a 3-wire serial interface. Four dimming states exist for the main and sub displays and 16 dimming states are available via internal PWM for the red, green and blue LEDs resulting in up to 4096 color combinations.
The LTC3205 charge pump optimizes efficiency based on VIN and LED forward voltage conditions. The part powers up in step-down mode and automatically switches to step-up mode once any enabled LED current source begins to enter dropout. Internal circuitry prevents inrush current and excess input noise during start-up and mode switching.
The LTC3205 is available in a low profile 24-lead (4mm x 4mm x 0.8mm) QFN package.
Applications
- Cellular Phones
- Wireless PDAs
- Multidisplay Handheld Devices
Documentation
Data Sheet 1
User Guide 1
Technical Articles 2
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 |
|---|---|---|---|
| LTC3205EUF#PBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) | ||
| LTC3205EUF#TRPBF | 24-Lead QFN (4mm x 4mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products |
||
| LTC3205EUF#PBF | PRODUCTION | |
| LTC3205EUF#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3205
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LTC3205EUF | Multi-Display LED Controller (Requires DC590 Controller)
Resources
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