PSPICE - is there a switch for DC/DC converters?

[lebevti]

take a buck converter for example, which would require a MOSFET or IGBT to switch the DC input on and off at high frequencies.

How would you model this in PSPICE? Is there a component that does this? Although there are MOSFET components, yes, how would I implement a driver that turns that transistor on and off?

Same for an SCR...is there a thyristor component built-in? and if so, how would you implement a gate driver for that? (Without having to do some complicated control circuit)

please dont suggest using a different software, I'm trying to do this in PSPICE.

 

[alec_t]

please dont suggest using a different software

I won't, but in LTSpice you would do this with a voltage source with its parameters set to give pulses of chosen width and rate. Doesn't Pspice have something similar?

 

[lebevti]

yes actually i think i found some useful info on how to do it in my power electronics textbook

 

[crutschow]

PSPICE has many models for MOSFETs, which is the preferred device to switch high frequency currents in a switching regulator. Just select one that meets your voltage and current requirements.

Don't know if there are any MOSFET driver models built-in. You can search for ones or built a driver using discrete devices.

SCR spice models are also available for download into PSpice, if they aren't already built-in.

 

[alec_t]

i found some useful info on how to do it in my power electronics textbook

I suggest you also have a good read of any Help files that come with PSPICE or are at the PSPICE website.

 

[lebevti]

cmon, everybody knows that Spice help files are a black hole