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DC1285A - LT3598EUF Demo Board | 6-String Boost LED Driver, 3.2V ≤ VIN ≤ 5.5V, Vout up to 44V @ 20mA (x6) with 2% Current Matching

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 - 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.