LT3597
Info : RECOMMENDED FOR NEW DESIGNS
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LT3597

60V Triple Step-Down LED Driver

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 4
1ku List Price Starting From $4.29
Features
  • Three 100mA Buck Regulators, Each Drives Up to 10 LEDs 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
  • ±2% LED Current Matching
  • External Resistor Sets LED Current for Each Channel
  • Internal Compensation and Soft-Start
  • Programmable Switching Frequency (200kHz to 1MHz)
  • Synchronizable to External Clock
  • Open LED Detection and Reporting
  • Shorted LED Pin Protection and Reporting
  • Programmable LED Thermal Derating
  • Programmable Temperature Protection
  • 5mm × 8mm Thermally Enhanced QFN Package with a 0.6mm High Voltage Pin Spacing
Additional Details
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The LT3597 is a 60V triple step-down LED driver capable of achieving 10,000:1 digital PWM dimming at 100Hz with fast NPN current sources driving up to 10 LEDs in each channel. LED dimming can also be achieved via analog control of the CTRL1-3 pin.

The step-down switching frequency is programmed between 200kHz and 1MHz. The frequency is also synchronizable to an external clock. The LT3597 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 LT3597 adaptively controls VOUT in order to achieve optimal efficiency. Other features include: 2% LED current matching between channels, open LED reporting, shorted LED protection, programmable LED current, and programmable temperature protection.

Applications

  • LED Billboards and Signboards
  • Mono, Multi, Full-Color LED Displays
  • Large Screen Display LED Backlighting
  • Automotive, Industrial, and Medical Displays
Part Models 4
1ku List Price Starting From $4.29

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT3597EUHG#PBF
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  • HTML
LT3597EUHG#TRPBF
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LT3597IUHG#PBF
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LT3597IUHG#TRPBF
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC1497A

LT3597EUHG Demo Board | Triple Step-Down LED Driver, 6V ≤ VIN ≤ 55V, VLED up to 34V @ 100mA (×3)

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DC1497A

LT3597EUHG Demo Board | Triple Step-Down LED Driver, 6V ≤ VIN ≤ 55V, VLED up to 34V @ 100mA (×3)

LT3597EUHG Demo Board | Triple Step-Down LED Driver, 6V ≤ VIN ≤ 55V, VLED up to 34V @ 100mA (×3)

Product Detail

Demonstration circuit 1497A is a 60V triple step-down LED driver featuring the LT3597. The demo board is optimized for driving nine white LEDs at 100mA output per regulator from a 48V input. The LT3597 features a 5V to 55V input voltage range; depending on the number of LEDs used, the minimum input voltage will change. When a different number or different color of LED is used for evaluation, attention should be given to the maximum output voltage setting and open LED detection fault reporting.


The connections between the board and LEDs strings should be as short as feasible. The circuit achieves 10,000:1 PWM dimming at 100Hz PWM frequency. LED dimming can also be by analog control of the CTRL1-3 pin.

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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