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DC1803A - LT3512EMS Demo Board | 36V to 75VIN, VOUT = 5V @ 500mA

Demonstration circuit 1803A is a monolithic high voltage isolated fl yback converter featuring the LT®3512. The demo circuit is designed for a 5V isolated output from an input voltage range of 36V to 75V. The maximum output current is 500mA. VIN can be lower if output current is less than 500mA. The circuit doesn’t require an opto-isolator due to the output voltage being sensed directly from the primary side transformer winding. A third winding is used to bias the LT3512 for highest effi ciency.

DC1803A - Schematic




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.