On Tuesday 21 May 2013 17:11:09 Jon Elson did opine: > Gene Heskett wrote: > > On Tuesday 21 May 2013 10:26:05 Peter C. Wallace did opine: > >> When using bipolar transistors as high power current sinks, make sure > >> you are not violating their secondary breakdown specs (a lot easier > >> to kill than you might think) > >> > >> > >> Peter Wallace > >> Mesa Electronics > > > > Despite my confidence that I knew what I was doing, it turns out that > > the SOA ratings on the bugs I bought and which arrived while I was > > trying to get some sleep on a dairy farm in NYS, turns out to suck > > dead toads through soda straws, Peter. > > > > It appears that the only way I can make a 10 amp sink, would be to > > make >15 identical circuits and stack them. I'm not all that fond of > > semi's in series. > > > > Page 5 of this link > > > > <http://www.st.com/web/en/resource/technical/document/datasheet/CD0000 > > 0005.pdf> > > > > defines the bad news. Operation in parallel, so they get the full > > jolt from the motor, says I'd have to use an emitter R high enough to > > keep the individual bug under .350 ma. > > I read the 100 V safe current at 350 mA not 350 uA as you show above. > > How about an IRFB260N, a 56 A FET? They generally behave VERY well > in the linear region. Still, you'd have to parallel a few of them, but > they can generally be paralleled without ballast resistors. You can > probably get 100 W or an amp at 100 V per transistor. > > Jon > I'll see about those when I return from dinner Jon. thanks.
> ------------------------------------------------------------------------ > ------ Try New Relic Now & We'll Send You this Cool Shirt > New Relic is the only SaaS-based application performance monitoring > service that delivers powerful full stack analytics. Optimize and > monitor your browser, app, & servers with just a few lines of code. Try > New Relic and get this awesome Nerd Life shirt! > http://p.sf.net/sfu/newrelic_d2d_may > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> I would rather say that a desire to drive fast sports cars is what sets man apart from the animals. A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_may _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
