BS170 to control motor speed

M

marcos.placona

Senior Member
Hi guys,

just wanted to make sure before I order it.

Can I use a BS170 to control a dc toy motor speed?

According to the datasheet, it seems to be ok, as the motors I'm using are:

5v
Current@rated load - 1A.
No load current - 350mA

and the datasheet for the mosfet says:

60v
Drain Current - Continuous 500 mA
Pulsed 1200

It's my first time using mosfets, so I just wanted to make sure it'll be ok. I believe I'll be using PWM to drive the motors through my L293D, so 1200mA on the mosfet should be enough in case the motor stall right?

Thanks in advance
 
D

Dippy

Moderator
I would have thought it was a bit weedy. I'd get something just to give you a bit of spare. And it won't switching on to it's best ability at Vgs of 5V. I don't know how you're going to drive it optimally. I'd check out some slightly more manly Logic Level MOSFETs.

It'll probably work, but it could be a lot better for a few extra pennies.

(And I'm going to have to modifiy something I said on another thread re: Vgs threshold. This is the first time I've seen it specified at 1mA. I'd only ever seen 250uA before. Oh well, live and learn. Just makes comparison harder.)
 
You must log in or register to reply here.
Top