LT3599
Info : RECOMMENDED FOR NEW DESIGNS
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LT3599

4-String 120mA LED Driver with ±1.5% Current Matching

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 10
1ku List Price Starting From $3.89
Features
  • True Color PWM Dimming Ratio Up to 3000:1
  • Drives Four Strings of LEDs at Up to 120mA
  • ±1.5% Accurate LED Current Matching
  • Wide Input Voltage Range: 3.1V to 30V
  • Output Voltage Up to 44V
  • Regulates LED Current Even When VIN > VOUT
  • Disconnects LEDs in Shutdown
  • Programmable Maximum VOUT (Regulated)
  • Open/Short LED Protection and Fault Flags
  • Programmable LED Current Derating
  • Adjustable Frequency: 200kHz to 2.1MHz
  • Synchronizable to an External Clock
  • Analog Dimming Up to 20:1
  • Programmable Input UVLO with Hysteresis
  • Thermally Enhanced 32-Pin (5mm × 5mm) QFN and 28-Pin TSSOP Packages
Additional Details
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The LT3599 is a fixed frequency 2A step-up DC/DC converter designed to drive four strings of 120mA LEDs up to a 44V output voltage. The switching frequency is programmable from 200kHz to 2.1MHz through an external resistor.

LED dimming can be achieved with analog dimming on the CTRL pin, and with pulse width modulation dimming on the PWM pin. The LT3599 accurately regulates LED current even when the input voltage is higher than the LED output voltage.

Additional features include programmable LED current derating, switching frequency synchronization to an external clock, LED string disable control, OPENLED alert pin, SHORTLED alert pins and programmable maximum output voltage when all LED strings are disconnected. The LT3599 is available in the thermally enhanced 32-pin (5mm × 5mm) QFN and 28-pin TSSOP packages.

Applications

  • Automotive Navigation TFT LCD Displays
  • Desktop and Notebook TFT LCD Displays
Part Models 10
1ku List Price Starting From $3.89

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

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Apr 6, 2022

- 22_0068

Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

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Feb 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

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Filter by Model

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Reset Filters

Part Models

Product Lifecycle

PCN

Apr 6, 2022

- 22_0068

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LT3599EFE#PBF

PRODUCTION

LT3599EFE#TRPBF

PRODUCTION

LT3599HFE#PBF

PRODUCTION

LT3599HFE#TRPBF

PRODUCTION

LT3599IFE#PBF

PRODUCTION

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PRODUCTION

Feb 20, 2022

- 21_0269

arrow down

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LT3599EUH#PBF

PRODUCTION

LT3599EUH#TRPBF

PRODUCTION

LT3599IUH#PBF

PRODUCTION

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC1327B

LT3599EFE Demo Board | 4-Channel Boost LED Driver, 8V ≤ PVIN ≤ 16V, VLED up to 44V @ 80mA

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DC1327B

LT3599EFE Demo Board | 4-Channel Boost LED Driver, 8V ≤ PVIN ≤ 16V, VLED up to 44V @ 80mA

LT3599EFE Demo Board | 4-Channel Boost LED Driver, 8V ≤ PVIN ≤ 16V, VLED up to 44V @ 80mA

Product Detail

Demonstration circuit 1327B is a 4-Channel 80mA LED Driver with +/-1.5% Current Matching featuring the LT3599. The LT3599 is a step-up DC/DC converter designed to drive up to 4-strings of LEDs at up to 120mA per string, and with an output voltage up to 44V. The LED strings are connected to internal current sources where the current level is set with an external resistor. Each string can have up to 10 white LEDs. Paralleling of strings is allowed.

The LT3599 runs from a 3.1V to 5.5V power supply, and the step-up converter is powered from an 8V to 16 voltage supply, though higher voltages up to 40V may be acceptable depending on the circuit requirements.
Tools & Simulations

Tools & Simulations 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.

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