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TINA/Spice/UCC5350: UCC5350MCD as driver for MOSFET at 1 MHz

Part Number: UCC5350
Other Parts Discussed in Thread: TINA-TI

Tool/software: TINA-TI or Spice Models

Hi all,

I am trying to design a 230V square wave 1 MHz MOSFET amplifier. For this purpose I selected an IRF740 (though I am open to other suggestions that maybe more suitable or would provide even higher frequencies). To drive the IRF740 I selected the UCC5350MCD. The Bus voltage will come from an isolating transformer (1:1) that feeds a bridge rectifier with capacitors to smooth the pulsating DC. To limit the current (P approx. 100W -> I approx 430mA) from the net I thought of using another MOSFET in linear application. For this purpuse I found the IXTP15N50L2 from littlefuse. As there is no spice model from littlefuse I am still using a IRF740 for simulation purposes. The current limiting part of the circuit seems to work, but the UCC5350MCD does not seem to drive the IRF740 in the simulation. Is there something wrong with how I apply the UCC5350MCD?
Pls find the simulation in this attachement:power_amp_mosfet.TSC

Thank you in advance for your help!

Stefan Tauber

  • Hi Stefan, 

    Thanks for reaching out to the High Power Drivers' team, my name is Mamadou Diallo and I will help address your question.

    It looks like your design had the input capacitor C1 connected to both the input rather than IN+ to GND and the IN- should be grounded in a non-inverting configuration.

    I have made those changes and attached the revision simulation below.

    Please let us know if you have further questions or press the green button if this addressed your question.

    power_amp_mosfet_Mamadou_Edits.zip

    Regards,

    -Mamadou