LT3595

PRODUCTION

16 Channel Buck Mode LED Driver

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Overview

  • 4.5V to 45V Input Supply Range
  • Up to 50mA LED Current per Channel
  • 100mA, 45V Internal Switches
  • 8% Relative LED Current Match at 20mA
  • 16 Independent LED Channels
  • 5000:1 True Color PWM™ Dimming Range
  • LEDs Disconnected in Shutdown
  • Internal Schottky Diodes
  • Low Quiescent Current
  • 2MHz Switching Frequency
  • RSET Pin Sets Master LED Current
  • Typical Efficiency: 92%
  • Open LED Detection and Thermal Protection
  • 56-Pin 5mm × 9mm × 0.75mm QFN Package
LT3595
16 Channel Buck Mode LED Driver
16-Channel LED Driver (Three LEDs per Channel), 20mA Current 5000:1 PWM VIN Dimming at 100Hz Product Package 1
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Documentation

Data Sheet 1

User Guide 1

Technical Articles 1

Data Sheet

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Software Resources

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Hardware Ecosystem

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Tools & Simulations

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  • LT3595
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Evaluation Kits

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schematic 1
DC1199A

LT3595EUHH Demo Board | 16-Channel Buck Mode LED Driver, 15V ≤ VIN ≤ 45V, VLED up to 12V @ 30mA (x16)

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Product Details

Demonstration circuit 1199A is a 16-Channel Buck Mode LED Driver featuring the LT3595EUHH. The circuit is optimized to drive 16 channels of three series LEDs at 30mA, though the LT3595 is capable of driving up to 10 LEDs at 50mA per channel. Each channel has three series white LEDs and they are stuffed on the PCB. The LT3595 features a wide input voltage range, integrated components, externally set LED current, high pwm dimming range, high efficiency, shutdown, open LED protection, and 2MHz switching frequency.


The 100mA, 45V fully integrated switches help drive up to 10 LEDs per channel in series at 50mA each. Internal catch diodes reduce external component count and circuit size. PWM dimming is as high as 1000:1 at 100Hz over the entire input voltage range.


There are three input power terminals: VIN ranges from 15V up to 45V and is used for powering the LEDs, VCC powers the LT3595 and the pwm gates, and µVIN (6-12V) powers the onboard PIC microprocessor. The PIC allows the board to demonstrate some preprogrammed patterns and PWM dimming. Although the range of the LT3595 VCC pin goes down to 3V, 5V is needed for the PWM signal gates to work properly with the PIC.
DC1199A
LT3595EUHH Demo Board | 16-Channel Buck Mode LED Driver, 15V ≤ VIN ≤ 45V, VLED up to 12V @ 30mA (x16)
DC1199A - Schematic

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