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Electronics => Electronics => Topic started by: Joker94 on August 29, 2009, 11:24:22 PM

Title: Mosfet's
Post by: Joker94 on August 29, 2009, 11:24:22 PM

i am about to make an order of futurlec and i want to get some mosfet's soi can constuct some H-Bridges.

The only thing is i am not 100% sure if there is a particular tipe i need as all the sites i look at seem to have a different type.

I would be glad if some people could point me in the right direction.

Title: Re: Mosfet's
Post by: Razor Concepts on August 30, 2009, 12:09:09 AM

You may want to get logic-level mosfets that can be triggered by 5v. "Standard" mosfets need to be triggered by a very high gate voltage, and usually people use a mosfet driver to convert the logic level to the higher voltage.

Title: Re: Mosfet's
Post by: Joker94 on August 30, 2009, 01:52:06 AM

if you have a chance could you please post an example of the logic level mosfet's. I looked all over futurlec and found nothing. Well with logic level in the name anyway.

And for a h-bridge does it matter about the type or channel of the mosfet.

Title: Re: Mosfet's
Post by: SmAsH on August 30, 2009, 02:00:28 AM

read the datasheet ;)

Title: Re: Mosfet's
Post by: Joker94 on August 30, 2009, 02:08:46 AM

well are you able to point me in the right direction pleases, there are hundreds and i don't know where to start.

Title: Re: Mosfet's
Post by: Joker94 on August 30, 2009, 02:33:04 AM

Would this be a good substitute ???

as i can not find the logic level mosfet's on futurlec and only want to make one order at the moment.

Title: Re: Mosfet's
Post by: ArcMan on August 31, 2009, 03:04:09 PM

If you're building your own high-power H-bridge motor controller, I suggest studying this...

http://www.robotpower.com/osmc_info/ (http://www.robotpower.com/osmc_info/)

You probably don't need exactly what they've designed (like 4 parallel MOSFETs), but it should be some variation of it.  There are many lessons to be learned, and these guys have learned them all.  (and so have I, but unfortunately it was before I learned of OSMC).

Title: Re: Mosfet's
Post by: Razor Concepts on August 31, 2009, 03:21:13 PM

On the Futurlec MOSFET page, scroll down to the IRFZ section and look for the part #s starting with IRL. L stands for Logic

Title: Re: Mosfet's
Post by: Joker94 on September 01, 2009, 05:05:40 AM

is this mosfet ok as i am not sure if i need a particular channel

http://www.futurlec.com.au/transistors/IRL540N.jsp (http://www.futurlec.com.au/transistors/IRL540N.jsp)