I’m wondering if there’s anything else I can do to improve the performance? To participate you need to register. The pull-up resistor will have to be sufficiently small in value so that you get an acceptable rise time for your application. Please write a comment. Well it works, but it occurred to me that it might be a really good idea to find out why and how.
|Date Added:||13 May 2009|
|File Size:||43.63 Mb|
|Operating Systems:||Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X|
|Price:||Free* [*Free Regsitration Required]|
I’ll say it again, no one is born knowing this stuff. If it’s at the load then your barking up the wrong tree. I’m wondering if there’s anything else I can do to improve the performance?
BJT push-pull for a MOSFET – Electrical Engineering Stack Exchange
For example, M1 is limited to 35A continuous, so replace these parts with something appropriate for your design and re-run the simulation. Your second version has a shortcut.
BJT Totem-Pole Power MOSFET driver (Low side) How and why?
Help identifying strange capacitor terminal style Started by Killians Today at Do you have it mounted on a heat sink? That means when the right side of R2 is in the range of 5.
Sign up using Facebook. I’m surprised no one mentioned it before. And as the bases and nosfet are tied together, it is impossible for both these conditions to be true at the same time.
In any case, the bases can’t be driven past the collector voltage, and the base current will always be only what is needed to sustain the emitter current. Sep 13, 6. Sounds like an excellent improvement.
However the present value of R2 limits the base current, because the voltage across R2 will be relatively low, so the transistors will not saturate hard and will turn off relatively fast. Bill, we went over that Mosfeet in another thread. Rise time ns, fall time ns. If this mosfeh goes above 6.
Want to know more? If in the source, you’ll likely get a negative-feedback behavior that totsm turnoff for many many nanoseconds. Finally, M3 serves as the high current driver to handle the Amp current. Sign up using Email and Password.
Now you’re finding out why most people use totem-pole drivers! Q1 is a simple inverting level translator to get the signal swing to 12 Volts.
You are talking about the top picture! Your BJTs are in a follower configuration. That will turn the transistor off quite quickly, even if it was in saturation. Or will it be held as the same voltage as the input 0V?
Particularly as I want to make sure it keeps working. Take a look at the datasheet for that FET. When the gate capacitors are discharged to about 0.