On Mon, Sep 17, 2012 at 12:59 PM, Peter Johansson w= rote: I was looking at the datasheet for the 1640 the other day any noticed > that while the "feature list" touts an 800 mA capacity, the graphs > show that the efficiency drops way off above 100 mA in many > configurations. My interpretation is that this chip isn't really > useful much above 100 mA in many cases. > > For those of you who were frying them, how much current were you > pulling through them when they fried? > For my application, they're good for something like ~350mA...which is about the power budget I needed. It was definitely tight, though, and the 800mA is aloof for most applications. I'm not sure how many amps were flowing when I fried mine....but as someone else has already pointed out, it's a little unfair for me to think these little guys shouldn't fry when getting a healthy dose of reverse current :) -m --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .