0
\$\begingroup\$

I'm making a boost converter in LTspice, initially with ideal switches and comparators, but now trying to use realistic components.

For the MOSEFT I just picked one from the available ones that has a low on resistance and small gate capacitance.

The gate drives is a bit more tricky, as they don't seem to come included with LTspice. So I went on the hunt on the web, and found that Infineon provides (unencrypted!) spice models.

I downloaded the MicroSim Pspice model for the IR2183 (also used here) from the Infineon product page, and have LTspice generate a symbol by right-clicking in the .sub file.

I made a little test schematic, like in the picture below, but the HO and LO outputs are stuck at respectively 5V and 0V. I have so far tried IR2183, IR2181, and IR2101 based on both the PSpice and OrCad files. All of them produce identical results: nothing.

I'm not tied to any particular driver or even manufacturer, so if there is a way to make this gate driver work, great, if there is another manufacturer that produces gate drivers and corresponding spice files, also fine.

LTspice circuit

\$\endgroup\$
  • 1
    \$\begingroup\$ Recommended minimum operating voltage for that device is 10 volts. I'm not saying that is the problem but try lifting the supply to 10 volts from 5 volts. \$\endgroup\$ – Andy aka Jun 1 '18 at 13:31
  • 2
    \$\begingroup\$ Linear actually makes gate drivers too, and they are available from LTSpice: LTC4441, LTC1693, ... \$\endgroup\$ – dim Jun 1 '18 at 13:32
  • 1
    \$\begingroup\$ try these models, only for ltspice ltwiki.org/files/LTspiceIV/examples/LtSpicePlus/Smps/Ir21xx/… \$\endgroup\$ – johnger Jun 1 '18 at 13:44
  • \$\begingroup\$ This is why LTSpice is free: The LTC4446 works fine, so now Linear technology is getting my business rather than Infineon because I'm too lazy to mess with their model. \$\endgroup\$ – Pepijn Nov 13 '18 at 8:39
  • \$\begingroup\$ Except the LTC4446 is not available at Farnell... \$\endgroup\$ – Pepijn Nov 24 '18 at 13:40

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.