Re: Power MOSFETs (still)

[Rod.Hower@ametek.com]

Semikron?
This company specializes in power modules and actually use infineon
silicon.
Fuji tends to be kind of expensive (at least they are here).  I guess this
depends on who's doing the resale.
>From my previous post, check out these links for some analog designs.

http://www.4qdtec.com/pwm-01.html


http://www.4qd.co.uk/
http://www.4qd.co.uk/addrs/links.html

and a really good source for tons of free info on a wide range of EV type
controls

http://www.4qdtec.com

I would recommend checking into International Rectifier MOSFET's

They are reasonably priced and stocked at large distributors such as
digikey and allied electronics

Also, if you are doing your own board layout, a really good tool can be
downloaded FREE at

www.expresspcb.com

I have done several of my own layouts with very good results.
You can print out the layout 1:1 size and put the parts on the paper to
verify the land pattern.
I've done custom parts as small as 20mil pin pitch with SMT and it worked!.

Good luck!
Rod



At 01:27 PM 29/05/01 -0400, you wrote:
>
>You'll get the most bang for the buck (no pun intended : ) with
>an Infineon CoolMOS device.  You can get a 20A in a TO-220 with .19 RDSon
>or a 47A in a T0-247 with .07 RDSon.
>If you want to work with lower voltage (such as 36V< on your bike), I
would
>recommend
>SPP100N06S2L-05
>These are 100amp devices that go down to 4.5 milliohms RDSon.
>It should only take 2 of these devices with a good heatsink to get the
>tires smoking.
>
>Rod
>

Unfortunately here on the arse-end of the second-most isolated continent
with the second-smallest continental population (second only to
Antarctica), we are mostly in the hands of a couple of larger suppliers of
common componentry, plus a bunch of smaller importers who need to be found
before you can get things from them.

Couldn't find a listing on SPP100N06S2L-05 or Infineon CoolMOS devices from
Farnell or RS components. Who makes them (am I right to assume Infineon
makes the CoolMOS and no-one I know of brings Infineon products into
Australia) ?

Also since I have access to Semikron and Fuji semiconductors at a good
price structure (showing the power repair side here), does anyone know if
either of them have (1) a device similar to SPP100N06S2L-05 for my Esissted
bike, and (2) a power FET at reasonable cost suitable for use in a
controller of up to, (say) 144V at up to 600A (controller current limit) in
case we get any grand ideas about building our own controllers.

(The point would be to save money and get a controller that is:
1) hard to kill
2) with minimal 'bells and whistles' [no micro, just simple analog &
digital low frequency PWM]
and [most importantly for us in this isolated part of the planet]
3) if we build our own, we can fix it, without waiting weeks/months for
freight).

James Massey