Is there a way to get the mosfet to switch without using a gate driver? Like have an additional little circuit like a darlington configuration suggested above?
This screenshot shows a 5V signal controlling an NPN transistor. The bias is only a few mA.
The NPN in turn controls a PNP.
The transistors are what is called a sziklai pair. It is similar to a darlington arrangement, except that a sziklai pair mixes N and P devices.
The 10k resistor is not absolutely needed for a transistor, however it is recommended for a P-mosfet in order to turn it off fully.
It is convenient to drive a P device this way. I placed it at the upper side, in the same position that your schematic has your switching device.
Yes, that's true. Possible options are:My only problem with a gate driver is how to supply it 18V so it outputs 18V to the gate of my mosfet. I think with your circuit I still have the same problem with getting the required voltage..
you can also use gate drive transformer to drive fet through, to stop you needing extra supply.
I would be open to ditching the microcontroller and trying to design some feedback circuitry to make it easier.
TPS2811 is a low side driver and does not work (or more exactly, doesn't achieve correct switching) with a buck converter and NMOSFET switch. I believe you'll see this if you review the simulation results thoroughly.If I used a gate driver like the TPS2811 would that work?
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