Re: Heatsink for DPAK

On 28 May 2008 12:53:34 GMT, Pasquale <desmomito@xxxxxxxxxxxx> wrote:

You may have a bit of trouble soldering this by hand. They are designed
for reflow soldering.
What equipment do you have available?

Actually I don't have really good equipment (I have the stuff to solder
by hand, "regular" equipment), for sure I don't have a reflow solder
station. I know that is gonna be difficult but how can I manage to solder
it by using "regular" equipment ? I need suggestions in order to get the
best result with the equipment I have.

I had a similiar question a while ago heres what I did. It's not ideal
but it worked.The poor mans reflow method.

All I do is put a dab of solder on the draintab of the mosfet,and some
solder on the drain portion of the footprint.Press the mosfet down and
heat the drain tab at the same time.Keep going around heating the
drain tab that extends above the case,and the drain part of the
footprint.I used a small insulated screwdriver to keep pressure on the
FET,while heating.

It took a few tries to get it down, but once you get the feel for
it,it does the job in a resonable time.Just dont overdo the solder.

Good luck

BTW, have you done the thermal calculations to figure out what size
heatsink you actually need?

Not at all. I've seen some heatsink and I though to take the best one. I
know that it's not good choice but I don't have any idea about the
calculation. Could you help me ?


Thank you,
Pasquale.
.

Relevant Pages

  • Re: english solder
    ... Arfa ... > Our factory is moving to be RoHS compliant by the EU deadline of April. ... > From my reading of the directive you can still use lead solder and non- ... > equipment after that date, ...
    (sci.electronics.repair)
  • Re: Lead free solder
    ... Equipment and the RoHS Restriction of Hazardous Substances Directives ... the solder joint has changed. ... I hate to think how many flux fumes I inhaled and lead I ...
    (uk.rec.audio)
  • Re: RoHS AKA Woah, Hoss!
    ... applicartion for pro-audio which may be based on the need for equipment to work ... I fail to see why you think the some problems are likely to be solved. ... MP solder to achieve 400C reliable electronics, then i am sure there are other small companies that are in the same boat. ...
    (sci.electronics.design)
  • Re: How to use hot air equipment?
    ... Can anybody guide me in using this equipment so that I can solder this chip? ... My understanding is that you need to use some special solder paste and put a drop of it on all the pads that you want to solder, then put the chip on top of it, then somehow heat it up. ... I've salvaged several PCBs this way, allowing me to just replace the toasted QFP instead of rebuilding a new board. ...
    (sci.electronics.design)
  • Re: Soldering D-PAK Mosfet? (TO-252)
    ... The D-PAK I'm using has a small drain tab that extends above the ... I just soldered the tab part that extends above the case to a small ... solder it any way that's convenient. ...
    (sci.electronics.basics)
Loading