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Ideal switch models

Other Parts Discussed in Thread: UCC28950, TINA-TI

Hi

I'm using Version 9.3.100.244 SF-TI to model a power supply based around the UCC28950 controller. I've got a circuit working (simulating) but I'm continually getting caught out by things like break down voltage ratings of the MOSFET switches in the power circuit and the output rectifier diodes. What would be really useful would be a basic MOSFET switch model - something with infinite breakdown voltage, infinite current capacity, fixed Rds_on (settable as a parameter) - nothing 'fancy' just an idealised on/off kind of model. Similarily a diode with an infinite reverse breakdown voltage, a fixed forward voltage, infinite current capability, no modelling of reverse recovery characteristics and so on.


This would allow me to concentrate on the behaviour of the controller rather than fight the parasitics. I can replace the 'idealised' models with 'proper' models at a later stage. PSIM for example offers these idealised models (but not the 'full models') and is ideal for this kind of work, except it can't import the UCC28950 model.

Any and all suggestions appreciated -