I am building a Buck converter with a max output current of 3A @ 45V. Supply is 50V. I want the build to be relatively simple, im not concerned with efficiency or component cost (within reason). I am switching at 20kHz with a 3.3V microcontroller output.
My first question is whether i would be better off using an NMOS and high side driver or a PMOS? Would i need a high side driver for a PMOS anyway?
As far as i can tell the important parameters for the MOSFET woudl be (i want overrated components to be safe):
Drain current = 8A+
Vds = 100V+
For the MOSFET Driver:
I am looking at this one, not sure if i totally understand the parameters given:
http://au.element14.com/internation...f/driver-half-bridge-200v-smd-2011/dp/1080612
Does the peak output current relate to how quickly it can charge the capacitance of the MOSFET?
Also, the following parameters are given... the way i understand it is, i need at least 10V above my 50V supply to drive an N Channel MOSFET. This module would allow me to have a 20V pk-pk square wave sitting on top of up to 200V DC (or in my case 50VDC)
My first question is whether i would be better off using an NMOS and high side driver or a PMOS? Would i need a high side driver for a PMOS anyway?
As far as i can tell the important parameters for the MOSFET woudl be (i want overrated components to be safe):
Drain current = 8A+
Vds = 100V+
For the MOSFET Driver:
I am looking at this one, not sure if i totally understand the parameters given:
http://au.element14.com/internation...f/driver-half-bridge-200v-smd-2011/dp/1080612
Does the peak output current relate to how quickly it can charge the capacitance of the MOSFET?
Also, the following parameters are given... the way i understand it is, i need at least 10V above my 50V supply to drive an N Channel MOSFET. This module would allow me to have a 20V pk-pk square wave sitting on top of up to 200V DC (or in my case 50VDC)
- Output Voltage:220V
- Output Voltage Max:20V
- Output Voltage Min:10V