DIY Brushed ESC Mosfet

[garethadams]

Hi,

Will the IRF1104L mosfet http://www.datasheetcatalog.com/datasheets_pdf/I/R/F/1/IRF1104L.shtml be suitable for the 12F675 ESC: http://www.designsoft.com.au/ahome/rc/PIC-ESC/ESC.html ?

Thanks

Gareth

[anestho]

What motors are you going to use? It all depends on the amp draw of the motors.

[Chippie]

It would appear that it would fit the bill, so long as you dont exceed the ratings...this would be subject to the size of motor/prop/cell number

[Probedude]

I'd look for something with a lower threshold voltage on the gate, maybe even a logic level mosfet. The mosfet is being driven directly by the PIC, so it will only see the +5V gate drive. To get the on resistance that they've spec'd, you need to have 10V difference between the gate and source leads. See fig 3 of the datasheet.

With 5V drive the on resistance may be a lot more and will seriously reduce your max current sinking capability.

[Probedude]

Gareth,
How's your brush ESC project coming along?

[z-matrix]

irf7455 ?

for above 4.5V gate drive there is irf7832

[Probedude]

Also the STS25NH3LL
http://www.st.com/stonline/books/pdf/docs/8679.pdf
Very respectable performance even down to 4.5V gate voltage.