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DC1497A - LT3597EUHG Demo Board | Triple Step-Down LED Driver, 6V ≤ VIN ≤ 55V, VLED up to 34V @ 100mA (x3)

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.

DC1497A - Schematic

 


Software

LTspice

LTspice® software 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

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice does not automatically open after clicking the link above, 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

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.