LT3598

RECOMMENDED FOR NEW DESIGNS

6-String 30mA LED Driver with ±1.5% Current Matching

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Overview

  • True Color PWM™ Dimming Delivers Up to 3000:1 Dimming Ratio
  • Drives Six Strings of LEDs at Up to 30mA
  • ±1.5% Accurate LED Current Matching
  • Wide Input Voltage Range: 3.2V to 30V
  • Output Voltage Up to 44V
  • Regulates Current Even When VIN > VOUT
  • Disconnects LEDs in Shutdown
  • Programmable Open LED Protection (Regulated)
  • OPENLED Alert Pin
  • Programmable LED Current Derating
  • Adjustable Frequency: 200kHz to 2.5MHz
  • Synchronizable to an External Clock
  • Parallel Channels for Higher Current per LED String
  • Thermally Enhanced 4mm × 4mm QFN and 24-Lead TSSOP Packages
LT3598
6-String 30mA LED Driver with ±1.5% Current Matching
90% Efficient LED Driver for 60 White LEDs LED Current Matching Product Package 1 Product Package 2
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Documentation

Data Sheet 1

User Guide 1

Design Note 1

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
LTC2631
PRODUCTION Single 12-/10-/8-Bit I2C VOUT DACs with 10ppm/°C Reference
Hot Swap Controllers 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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:

  • LT3598
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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
DC1285A

LT3598EUF Demo Board | 6-String Boost LED Driver, 3.2V ≤ VIN ≤ 5.5V, VOUT up to 44V @ 20mA (×6) with 2% Current Matching

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Product Details

Demonstration circuit 1285 is a 6-String 30mA LED Driver with 1.5% Current Matching featuring the LT3598. The LT3598 is a step-up DC/DC converter designed to drive up to 6-strings of LEDs at 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. The input demo board input voltage range is 3.2V to 5.5V, limited by the voltage rating of the bias capacitor, C2. The IC voltage rating is 30V.

The demonstration circuit is configured to drive 20mA through each LED string. Each string can have up to 10 white LEDs. The circuit operation frequency is set to 1MHz. Parameters such as the LED current; the switching frequency, etc can be modified easily based on the demo circuit.

DC1285A
LT3598EUF Demo Board | 6-String Boost LED Driver, 3.2V ≤ VIN ≤ 5.5V, VOUT up to 44V @ 20mA (×6) with 2% Current Matching
DC1285A - Schematic

Latest Discussions

3 Years Ago
Selection of resistor and capacitor at VC for LT3598
3 Years Ago
LT3598 Minimum pulse width during PWM dimming
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