>Boy, are you wrong ;-). Need to do more work >involving lead acid batteries imho. Oh I'm quite aware of how beefy Lead Acid batteries are, and always take great care around them because of this. However I don't recall the original poster talking of an automotive app, but may have missed it. OTOH it may just be that I'm too used to dealing with 29V space craft power supplies being imitated by 30A switchmodes which shut down when anything goes awol. But what I was getting at was the possibility of having a shunt that did go o/c if something on the output side went wrong, would the chip stand a full 24V across the terminals that are supposed to have only millivolts across it? I have not checked the data sheet, but ...... -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body