Hi,
i am currently trying to build a (really more) h-bridge controlled by an arduino uno(5v/40mA per pin) to drive a steppermotor (3 A per coil). I will try to connect the n-type and p-type mosfet on each side together to only use 2 pins on an arduino, since i will use 3 stepper motors i cant use 4 pins for each h-bridge without upgrading my arduino (and that i want to avoid because of the price). I am unsure if shoot through will be a problem with a switching frequency of 250 Hz or less. Now I found this mosfets and am not totally sure if i oversee something:
https://de.farnell.com/en-DE/microchip/lp0701n3-g/mosfet-p-ch-0-5a-16-5v-to-92-3/dp/2851547
https://de.farnell.com/en-DE/infineon/irlu024npbf/mosfet-n-55v-17a-i-pak/dp/8651329
Thanks for any advice.

 

Arduino pin may have 3 states: High, Low, high impedance. You can use high impedance state for a dead-times.

P-mos in link is not suitable for 3Amps.
The N-mos seems ok to me.

 

i am currently trying to build a (really more) h-bridge controlled by an arduino uno(5v/40mA per pin) to drive a steppermotor (3 A per coil)

You would also want to use Logic Level MOSFETs. Making sure your MOSFETs can handle the load current ald with some overhead.
Next I think rather than build there are plenty of off the shelf H Bridge modules available and it's easier to just buy a turn key off the shelf solution. Avoid the older L298 modules unless you can work with the losses.

What Arduino were you planning to use?

Ron

 

P-mos in link is not suitable for 3Amps.

I overlooked that, any recommendations what might work? I searched digikey for a logic level p-channel one, but didnt find anything.

Next I think rather than build there are plenty of off the shelf H Bridge modules available and it's easier to just buy a turn key off the shelf solution.

Yes, most definitively. I just enjoy doing things from scratch(as long as it doesnt get too ridiculous).

What Arduino were you planning to use?

the arduino uno.

 

I searched digikey for a logic level p-channel one, but didnt find anything.

Edit: the problem is I need through hole mounted ones

 

I found some of these p-type resistors, i know they arent logic level ones, so they wont be absolutely perfect but would they work anyways?
https://www.alldatasheet.com/datasheet-pdf/view/68328/IRF/IRF9540N.html

 

An IRF5305 should be ok. You don’t need a 100V type and 55V has lower/better Rds_on and lower Vgs_threshold.

For N-ch you can use an IRFZ44N.

 

Ok, thanks for the help. Just one more question:If i connet the mosfets like i intend to do, with the P and N channel gate on each side connected and hooked up to the arduino uno, there will be some shoot through happening, i know that, but can somebody tell me how to estimate if this will be a problem when only switching every 3ms?