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Old 12th January 2013, 11:42 AM   #8991
Salas is offline Salas  Greece
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Thin film the TNPW, not Z foil, yes?
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Old 12th January 2013, 11:44 AM   #8992
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For a full fledged board, it would get more difficult. They have enough variations, that switching is no big deal. Paralleling is easy, by stacking. Vishay makes higher power smd versions that i am using. All very similar performance specs. Of course small signal is where the excel. I did get matched caps. And have some teimmer psoitions that cant be seen as an intentional act. There are two sides to every story....an dboard, in this case.
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Old 12th January 2013, 11:45 AM   #8993
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Quote:
Originally Posted by Salas View Post
Thin film the TNPW, not Z foil, yes?
Yes, TNPW.

I will post the doc on rrsistor noise. You think the YNPW perform well, wait till you see PBH 3W.

EDIT: I was wrong about the 10ppm. That is for Tyco RN73. I picked 50ppm TNPW becaus eit performed better in noise test.
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Old 12th January 2013, 12:11 PM   #8994
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Because you got to have some thermal mass to fight temp roller coasting. Anyway they look like a good balance between performance and price.
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Old 12th January 2013, 12:26 PM   #8995
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I think you are exactly correct. A good visual picture og this is the chart with the Caddocks. As you go up in power rating increased thermal mass), the noise level drops. Here it is.

https://dcc.ligo.org/public/0002/T09...rent_noise.pdf

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Because you got to have some thermal mass to fight temp roller coasting. Anyway they look like a good balance between performance and price.
They are on par with Vishay Zfoil. Of course this says nothign about the sound of thin film vs foil.
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Old 12th January 2013, 03:50 PM   #8996
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Little update. Home from basketball practive, so time to start. Not sure the grounding scheme is ideal, but can be tweaked.
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Old 12th January 2013, 04:19 PM   #8997
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Nice pcb, good lucky.
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Old 12th January 2013, 04:21 PM   #8998
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You should protect it from oxidization with some chemical in the end?
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Old 12th January 2013, 04:24 PM   #8999
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Layoyt wasnt perfect due to hammonds inability to measure. It will be redone.
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Old 13th January 2013, 02:24 PM   #9000
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Got them mostly finished yesterday. Got to mount the SSLV fets on a sink, which sucks with metal back fets. Need to scrub the main boards with alcohol and then will fire it all up.
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