LT3596 - 60V Step-Down LED Driver

Features

  • 300mA Buck Regulator, Drives Up to 10 LEDs per Channel with Fast NPN Current Sources
  • Fast Current Sources for <1μs Pulse Widths (10,000:1 True Color PWM™ Dimming at 100Hz)
  • LEDs Disconnected in Shutdown
  • Adaptive VOUT for Increased Efficiency
  • 6V to 60V Input Voltage Range
  • ±1.5% Accurate LED Current Matching
  • External Resistors Set LED Current for Each Channel
  • Requires No External Compensation
  • Programmable Switching Frequency (200kHz to 1MHz)
  • Synchronizable to External Clock
  • Open, Short LED Detection and Reporting
  • Programmable LED Thermal Derating and Reporting
  • Programmable Temperature Protection
  • 5mm × 8mm Thermally Enhanced QFN Package with 0.6mm High Voltage Pin Spacing

Typical Application

LT3596 Typical Application
LT3596 Typical Application

Description

The LT®3596 is a 60V step-down LED Driver. It achieves 10,000:1 digital PWM dimming at 100Hz with fast NPN current sources driving up to 10 LEDs in each channel. 100:1 LED dimming can also be done with analog control of the CTRL1-3 pin.

The step-down switching frequency is programmable between 200kHz and 1MHz and is synchronizable to an external clock. The LT3596 also provides maximum LED brightness while adhering to manufacturers’ specifications for thermal derating. The derate temperature is programmed by placing a negative temperature coefficient (NTC) resistor on the master control pin.

The LT3596 adaptively controls VOUT in order to achieve optimal efficiency. Other features include: 1.5% LED current matching between channels, open LED reporting, shorted LED pin protection and reporting, programmable LED current and programmable temperature protection.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

QFN-52

LT3596 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT3596EUHG#PBF QFN 51 E $5.22 $3.65 View
LT3596EUHG#TRPBF QFN 51 E $3.71 View
LT3596IUHG#PBF QFN 51 I $6.13 $4.29 View
LT3596IUHG#TRPBF QFN 51 I $4.35 View
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1542A LT3596EUHG Demo Board | LED Driver, 6V ≤ VIN ≤ 55V, Output = 8 Series LEDs @ 100mA. $175.00
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Click here to view our complete list of demo boards

Applications

  • LED Billboards and Signboards
  • Mono, Multi, Full Color LED Displays
  • Large Screen Display LED Backlighting
  • Automotive, Industrial and Medical Displays

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Design Tools

LTspiceIV

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice IV

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Models for the following parts are available in LTspice IV:
LT3596

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