franzschluter
- Joined Jun 1, 2009
- 95
For highside or lowside, I have to be honest I have no idea how these kind of motors work. All what I know is that the upper mosfet and lower mosfet must not turn on same time. If they don't turn on same time this will practically work.
Regarding charge pump capacitor... This is needed to reach same input gate voltage as high as 200V in your case for a short amount of time only just to help mosfet go "ON".
Your transistor cannot be 2N3903 because 2N3903 only support till 40V. I only showed an example not your actual circuit. You must find same NPN that can handle at least 200V. Maybe a FJN13003 would do the trick.
Take note using transistor is more expensive than using only capacitor charge pump. In my experience charge pump is what I know and commonly use. But transistor driven MOSFET should also work. I have seen working units as such but never selfbuilt.
Mount heatsink for MOSFET. Before pluging everything on the mosfet try measure first the outputs of the transistors (Collector to ground) If it is turning on and off properly. If so then connect your MOSFETS to a nice heatsink. Goodluck tell me if it works
Cheers
Franz
Regarding charge pump capacitor... This is needed to reach same input gate voltage as high as 200V in your case for a short amount of time only just to help mosfet go "ON".
Your transistor cannot be 2N3903 because 2N3903 only support till 40V. I only showed an example not your actual circuit. You must find same NPN that can handle at least 200V. Maybe a FJN13003 would do the trick.
Take note using transistor is more expensive than using only capacitor charge pump. In my experience charge pump is what I know and commonly use. But transistor driven MOSFET should also work. I have seen working units as such but never selfbuilt.
Mount heatsink for MOSFET. Before pluging everything on the mosfet try measure first the outputs of the transistors (Collector to ground) If it is turning on and off properly. If so then connect your MOSFETS to a nice heatsink. Goodluck tell me if it works
Cheers
Franz