george_leon
Junior Member level 3
you may consider TLP250 MOSFET driver.
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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.
The problem of controlling the power switch with a suitable circuit isn't directly related to the intended usage of a microcontroller. It also arises if you use a conventional PWM controller IC or any other switched mode regulator control design.
The microcontroller adds a digital controller design problem. If you feel that designing the power stage is demanding enough, changing to conventional analog control might be wise.
The 18V in this schematic is your rectifier output voltage. The circuit solves the driver voltage problem by using a PMOS instead of a NMOS transistor and inverting the gate voltage.My only issue with this is where would I get the 18V supply?