Reply by Lasse Langwadt Christensen●January 25, 20232023-01-25
onsdag den 25. januar 2023 kl. 00.42.02 UTC+1 skrev John Larkin:
> On Tue, 24 Jan 2023 23:40:06 +0100, Gerhard Hoffmann <dk...@arcor.de>
> wrote:
> >Am 24.01.23 um 23:00 schrieb John Larkin:
> >> https://www.digikey.com/en/products/detail/epc/epc2308engrt/16784421
> >>
> >> I recall some EPC suit saying that they would never sell a packaged
> >> part.
> >
> >At least, that's not much of a package. :-)
> >
> >I once used one of their smaller parts 0.9 mm * 0.9 mm
> >in a chopper amplifier to take advantage of the small
> >charge injection. It turned out to be easily soldered.
> >They call that thingie a power transistor.
> >
> >I used the Altium part decals that EPC proposed. They have the
> >solder mask on part of the pads. JLCPCB asked back if I really
> >wanted it that way. I said yes and it worked nicely.
> >
> >Gerhard
> >
> >
> >
> I like the tiny 4-ball parts, like EPC2038. Their drain-gate
> capacitance is about zero so you can do stuff that wouldn't work with
> mosfets.
>
> They recommend solder-mask-defined pads but that's not really
> necessary; the worst aligned thing on a PCB is usually the mask.
as long as alignment is good enough that the openings land on copper only the scale should matter
Reply by legg●January 24, 20232023-01-24
On Tue, 24 Jan 2023 14:00:30 -0800, John Larkin
<jlarkin@highlandSNIPMEtechnology.com> wrote:
'Sort of' responding to their sales team's feedback in Europe.
RL
Reply by John Larkin●January 24, 20232023-01-24
On Tue, 24 Jan 2023 23:40:06 +0100, Gerhard Hoffmann <dk4xp@arcor.de>
wrote:
>Am 24.01.23 um 23:00 schrieb John Larkin:
>> https://www.digikey.com/en/products/detail/epc/epc2308engrt/16784421
>>
>> I recall some EPC suit saying that they would never sell a packaged
>> part.
>
>At least, that's not much of a package. :-)
>
>I once used one of their smaller parts 0.9 mm * 0.9 mm
>in a chopper amplifier to take advantage of the small
>charge injection. It turned out to be easily soldered.
>They call that thingie a power transistor.
>
>I used the Altium part decals that EPC proposed. They have the
>solder mask on part of the pads. JLCPCB asked back if I really
>wanted it that way. I said yes and it worked nicely.
>
>Gerhard
>
>
>
I like the tiny 4-ball parts, like EPC2038. Their drain-gate
capacitance is about zero so you can do stuff that wouldn't work with
mosfets.
They recommend solder-mask-defined pads but that's not really
necessary; the worst aligned thing on a PCB is usually the mask.
https://www.dropbox.com/s/4jh47hyfj18e7ff/Bad_Chinese.jpg?raw=1
Reply by Gerhard Hoffmann●January 24, 20232023-01-24
At least, that's not much of a package. :-)
I once used one of their smaller parts 0.9 mm * 0.9 mm
in a chopper amplifier to take advantage of the small
charge injection. It turned out to be easily soldered.
They call that thingie a power transistor.
I used the Altium part decals that EPC proposed. They have the
solder mask on part of the pads. JLCPCB asked back if I really
wanted it that way. I said yes and it worked nicely.
Gerhard
Reply by John Larkin●January 24, 20232023-01-24
https://www.digikey.com/en/products/detail/epc/epc2308engrt/16784421
I recall some EPC suit saying that they would never sell a packaged
part.