Brent Brown wrote: > Sean Breheny wrote: > > I have a circuit which needs to switch a 48V supply (which can rise > > as high as 80V). The load is ground referenced and can draw as much > > as 100 Amps. The switch, however, need not open while any more than > > 1 Amp is flowing. > > > Anyone know of an IC to do gate drive for something like this? > > Yes, > > The following are an absolutley brilliant invention and not well > enough known (IMHO)... > > http://www.irf.com/product-info/datasheets/data/pvin.pdf > > Think of it as an optocoupler with an LED on one side and a solar cell > on the other side. Output voltage is completely isolated. Limited in > it's applications by it's output current and thereby turn on speed > when switching MOSFET's. Potentialy (no pun intended) could be exactly > what you need. P.S. For more information check out their application note... http://www.irf.com/technical-info/appnotes/an-1017.pdf -- Brent Brown, Electronic Design Solutions 16 English Street, St Andrews, Hamilton 3200, New Zealand Ph: +64 7 849 0069 Fax: +64 7 849 0071 Cell: 027 433 4069 eMail: brent.brown@clear.net.nz -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist