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30th March 2005, 07:58 AM
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#1 |
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diyAudio Member
Join Date: Jul 2003
Location: Everywhere (Buddhist's context)
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My heroic efforts for X7R bypassing/decoupling.
I've measured several types of elcaps at the current= 1A (~30nS falling edge)square wave for ESR&ESL evaluation. My choice was Hitachi HU3 22x30 1000u/100V=45mOhm 8nHn, maybe 8nHn aren't exact value, but others gave around 12-15 nHn. Simulation with additional 10uF (ideal) show almost null ringing, so I have concentrated all my patience and taken 200 pieces KX7RCERCAP 0.22/50V 0805.
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Best regards, E1. |
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30th March 2005, 08:25 AM
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#2 |
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diyAudio Member
Join Date: Jan 2002
Location: North American Continent
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Hello Ivan, so it seems more economical to parallel some cheaper capacitors than to use a single high end one. The performance can be similar.
Best Regards.
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USMPS http://groups.yahoo.com/group/switchmode/ |
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30th March 2005, 08:36 AM
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#3 |
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diyAudio Member
Join Date: Jul 2003
Location: Everywhere (Buddhist's context)
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Yeah, if the time isn't money yet
However 200 pcs 0805 not so easy way at least.. Next time i'll just cut the pins of the hole through X7R 4.7uF caps etc.
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