I am doing something similar to this with an lm3480, but the entire PCB is encased in a heat conductive potting compound (an epoxy) On Fri, 14 May 1999, MILTON MEDICINTEKNIK KB wrote: > Hi again Andy , > > A whole sq cm ? That is not so bad. An SO8 and a zener would find room. > > Not knowing your product, and how this PCB is to be used, I am not joking, as I suggest that you should look for a 1x1 cm cooler. Maybe 6 - 8 mm high. Just guessing - but a block like that (with small "fins" of course) would just get luke warm at 2 Watts. That's how I would look at it. Such coolers are available. And again - 2 Watts is always 2 Watts. Whatever the compmonent. Color, material and size counts. > > But again - I don't know if that is to tall, impossible to affix, or whatever. Depending on quantity, a custom designed cooler might be a solution. > > Best Regards > > > Sven > -----Ursprungligt meddelande----- > Från: Andy Kunz > Till: PICLIST@MITVMA.MIT.EDU > Datum: den 14 maj 1999 22:04 > Ämne: Re: SV: voltage regulator question > > > >>The TL317CD is the SO8 version of a LM317 regulator. Max 40 V and 100 mA, > >>but - I guess it ould run too hot... > > > >Thnks. I'll check. > > > >>You don't have room to help this little fellow out do you ?; with a zener > >>in series to the input or soething ? > > > >Room? It's about 1cm square. A Zener would be possible, but it'll still > >be warm. > > > >>Anyway - just look at the size of a SO8 product. Whatever it contains, it > >>needs thermal assistance with black aluminium somehow in my opinion. Can you > >>fit a cooler on top ? > > > >Cooler? HA! > > > >Andy > > > >================================================================== > > Montana Design Tech Support - http://www.montanadesign.com > >================================================================== > > >