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/CD00000005.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 ------------------------------------------------------------------------------ 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
