Super Regulator, collecting the facts - Page 45

peranders · 20th September 2005, 06:07 AM

Quote:

Originally posted by jackinnj
I finished up some layouts for an SMT version of the SuperRegulator -- this is what a 3D version looks like -- the pre-regulators are SOT-223 and Nat Semi has some specific recommendations for copper plane heatsinking:

Jack, has your layout left your computer yet? Prototype is made?

jackinnj · 20th September 2005, 12:44 PM

PA -- haven't sent out for proto's yet - i will run one in the shop and test it for stability, noise and impedance...

peranders · 20th September 2005, 12:53 PM

If you don't have it already, add groundplane on the "solderside" also to increase the cooling.

jackinnj · 20th September 2005, 12:56 PM

I don't even know if I will use the D-PAK transistors -- using them requires a cutout for the heatsink which is $$$$$.

peranders · 20th September 2005, 01:00 PM

SOT223 is capable if 100 mA at 5-10 volts loss.

jackinnj · 20th September 2005, 01:13 PM

i have the MJD44H11 and MJD45H11 shown on the 3D image. They are really quite nice to use, but a bit different from those specified in the Jung articles.

peranders · 20th September 2005, 01:39 PM

What's the difference besides higher ratings compared to D44H8/D45H8.

jackinnj · 20th September 2005, 02:13 PM

the MJD's have higher BF, lower VAF, lower saturation current.

BWRX · 14th November 2005, 04:53 PM

Quote:

Originally posted by Fred Dieckmann
Measuring Power Supply Output Impedance Part I
J. Breakall TAA 1/1983

Measuring Power Supply Output Impedance Part II
J. Breakall TAA 2/1983

The quote comes from post #137 way back on page 14 of the thread.

Sorry for going off topic, and this may be pure coincidence, but is the author/contributor of those articles mentioned above James Breakall? If so, he was a professor of mine in college who I knew fairly well! I'll have to email him to ask if that is in fact him that wrote those articles.

Elso Kwak · 14th November 2005, 09:34 PM

Quote:

Originally posted by jackinnj
the MJD's have higher BF, lower VAF, lower saturation current.

Is that an advantage?

20th September 2005, 12:53 PM	#443
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	If you don't have it already, add groundplane on the "solderside" also to increase the cooling. __________________ /Per-Anders (my first name) or P-A as my friends call me

20th September 2005, 01:00 PM	#445
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	SOT223 is capable if 100 mA at 5-10 volts loss. __________________ /Per-Anders (my first name) or P-A as my friends call me

20th September 2005, 01:39 PM	#447
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	What's the difference besides higher ratings compared to D44H8/D45H8. __________________ /Per-Anders (my first name) or P-A as my friends call me

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20th September 2005, 12:44 PM	#442
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	PA -- haven't sent out for proto's yet - i will run one in the shop and test it for stability, noise and impedance...

20th September 2005, 12:56 PM	#444
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	I don't even know if I will use the D-PAK transistors -- using them requires a cutout for the heatsink which is $$$$$.

20th September 2005, 01:13 PM	#446
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	i have the MJD44H11 and MJD45H11 shown on the 3D image. They are really quite nice to use, but a bit different from those specified in the Jung articles.

20th September 2005, 02:13 PM	#448
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	the MJD's have higher BF, lower VAF, lower saturation current.

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