LTC3212

PRODUCTION

LTC3212

RGB LED Driver and Charge Pump

PRODUCTION

RGB Power Supply and Current Control slide

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1ku List Price Starting From $1.75

Features

Power and Current Control for Driving RGB LEDs
Individually Programmable Current Sources
1x or 2x Mode, Low Noise, Constant Frequency Charge Pump
Single Wire Enable Control for All LEDs
White Mode Adjusts R, G, B Currents for White Light
25mA Maximum LED Current
V_IN Range: 2.7V to 5.5V
Automatic Soft-Start, Mode Switching and Output Disconnect in Shutdown Mode
Available in 12-Lead (3mm × 2mm) DFN Package

Additional Details

The LTC3212 is a low noise charge pump RGB LED driver capable of driving three LEDs up to 25mA each from a 2.7V to 5.5V input. Low external part count (one flying capacitor, two bypass capacitors and one to three programming resistors) makes the LTC3212 ideally suited for small, battery-powered applications.

Built-in soft-start circuitry prevents excessive inrush current during start-up and mode switching. High switching frequency enables the use of small external capacitors. The charge pump shuts down to a high impedance mode to prevent LED leakage while the LTC3212 is off.

Each LED may be individually turned on or off via a single pin interface. The current through the LEDs may be individually programmed with resistors or may share a single programming resistor. White mode adjusts the red, green and blue LED current ratios for a white light when all three LEDs are programmed to be on.

LED currents are regulated using internal low dropout current sources. Automatic mode switching optimizes efﬁ ciency by monitoring the LED current drivers and switches mode only when dropout is detected. The part is available in a 3mm × 2mm 12-lead DFN package.

Applications

Cellular Phones
Media Players
RGB Back Lights

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

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FAQs

Sales & Ordering FAQs

Part Models 2

1ku List Price Starting From $1.75

Technical Documents 3

LTC3212: RGB LED Driver and Charge Pump Data Sheet 07/17/2007

R415 Reliability Data 03/23/2018

DC1187A - Demo Manual 09/24/2009

Design Resources 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
LTC3212EDDB#TRMPBF	12-Lead DFN (3mm x 2mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3212EDDB#TRPBF	12-Lead DFN (3mm x 2mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3212EDDB#TRMPBF
Pin/Package Drawing
12-Lead DFN (3mm x 2mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3212EDDB#TRPBF
Pin/Package Drawing
12-Lead DFN (3mm x 2mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

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LTC4311	PRODUCTION	Low Voltage I²C/SMBus Accelerator

DC1187A

LTC3212EDDB | RGB LED Driver and Charge Pump, 2.7V ≤ VIN ≤ 5.5V, VLED up to 5V @ 25mA (×3) (DC590 Requires)

DC1187A

LTC3212EDDB | RGB LED Driver and Charge Pump, 2.7V ≤ VIN ≤ 5.5V, VLED up to 5V @ 25mA (×3) (DC590 Requires)

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Product Detail

Demonstration circuit 1187 is an RGB LED Driver and Charge Pump featuring the LTC3212. The LTC3212 is a low noise boost charge pump capable of driving three LEDs at up to 25mA each. The charge pump operates in either 1x or 2x mode, with automatic mode switching. Individual current sources allow each LED to be turned on individually, in combination with the other LEDs, or in white mode using a single wire interface. The demo board input voltage range is 2.7V to 5.5V. White mode optimizes the red, green, and blue current settings to provide the best white color. LED currents are regulated using internal low dropout current sources. Automatic mode switching optimizes efficiency by switching modes only when a dropout is detected.

Resources

ZIP

DC1187A - Design File

738.00K

PDF

DC1187A - Demo Manual

2.00M

PDF

DC1187A - Schematic

27.00K

DC1187A

LTC3212EDDB | RGB LED Driver and Charge Pump, 2.7V ≤ VIN ≤ 5.5V, VLED up to 5V @ 25mA (×3) (DC590 Requires)

LTspice 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.