On lower voltage circuitry, correct me if i'm wrong, you can connect a p channel and an n channel gate to the same output pin. So that if pwm i/o 1 is high the n channel mosfet is on and the p channel is off. When the i/o 1 is low the n channel mosfet is off and the p channel mosfet is on.
My drawimg capability sucks when it comes to schematics. But since a few people here know a think or two about buck converters somewhere else someone brought up the idea of replacing the diode with a mosfet. Question was on lower powered systems would this have better efficiency than a diode.
On a high powered system i was wondering if this might be scalable.
Would using a high powered p fet. Drop down resistors and a low powered n fet be a better way of switching the high powered fet?
Im wanting to make a dc to dc buck converter for a solar panel array. Sparkfun has a couple 60 v 30 amp p and n channel mosfets. Which would allow my to wire 3 solar panels on in series. Problem is, i was really hopeing to be able to wire my solar panels in a 4 panel series which would require an 80 volt p and n channel mosfet preferably logic level and i cant seem to find one. Does anybody know of an 80v logic level p channel mosfet?There are several 80 volt mosfets to be had but getting the gate voltage up to 80 volts is an issue in a complementary pair. For those that dont understand complementary pair. Im wanting the gates of both the p channel and n channel to be connected to the same pwm output. If there is no such thing as a 80 v logic level p channel fet. How much of a logistical nightmare am i looking at to get an 80 v p channel gate up to 80 volts without destroying the gate of a n channel.I just woke up and my brain feels kinda fried from thinking to much last night so pardon if i confused n channel with p channel.
Why would one use p-channel MOSFETs for this?
What is your input and output voltage, and output current requirement?
Input voltage 80v 5 amp, output 14v at 40 ampsMarkT so your suggesting using an n channel fet with a bootstrap capacitor and try to accurately keep the capacitor at 15 volts. And when i need it to swing up make sure not to over 100 volts. Think i trust myself with a p channel fet cause i have no idea how to even design such a rig. Maybe some drop down resistors 10:2 ratio diode tap and a fair cap. Would give me 16 volts in the cap. But the inductor makes it all screwy.