LT3599

RECOMMENDED FOR NEW DESIGNS

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

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Overview

  • 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
LT3599
4-String 120mA LED Driver with ±1.5% Current Matching
90% Efficient 12W LED Driver LED Current Matching Product Package 1 Product Package 2
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Documentation

Data Sheet 1

User Guide 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Circuit Monitors 1
LT2940
PRODUCTION Power and Current Monitor
Digital to Analog Converters (DACs) 1
LTC2635
PRODUCTION Quad 12-/10-/8-Bit I2C VOUT DACs with 10ppm/°C Reference
Pulse-Width Modulation (PWM) & Pulse Generators 1
LTC6992
TimerBlox: Voltage-Controlled Pulse Width Modulator (PWM)
Temperature Sensors 1
LTC2997
PRODUCTION Remote/Internal Temperature Sensor
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LT3599
LTspice

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

eval board
schematic 1
schematic 2
schematic 3
schematic 4
DC1327B

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

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Product Details

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.

DC1327B
LT3599EFE Demo Board | 4-Channel Boost LED Driver, 8V ≤ PVIN ≤ 16V, VLED up to 44V @ 80mA
DC1327B Evaluation Board DC1327B Evaluation Board - Top View DC1327B Evaluation Board - Bottom View DC1327B - Schematic

Latest Discussions

3 Years Ago
About the maximum LED current of LT3599
3 Years Ago
Measurement for phase margin of LT3599
4 Years Ago
LT3599_LED current
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