[SI-LIST] Re: Voltage & Prepeg thickness
- From: "Curt McNamara" <CurtM@xxxxxxxxxxx>
- To: <DOUG.POWELL@xxxxxxx>, <sreekanthn@xxxxxxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Fri, 8 Sep 2006 09:30:32 -0500
There may also be safety considerations -- simply using standard values
for V/mil does not guarantee a safe product. You have two options -- use
the recommended creepage and clearance distances between high voltage
and SELV (from UL60950 or similar), or test each instance with a hi-pot
tester.
Curt
Curt McNamara. P.E.=20
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Logic Product Development=20
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Minneapolis, MN 55401=20
Tel 612-436-5178=20
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-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Powell, Doug
Sent: Friday, September 08, 2006 8:06 AM
To: sreekanthn@xxxxxxxxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Voltage & Prepeg thickness
Sreekanth,
The best way to do this is to refer to the voltage impulse tables in IEC
60664-1 and determine the impulse rating required for your 1kV working
voltage. Then divide the V/mil rating into that number. =20
Simply dividing the 1000 volts by the V/mil rating of the prepreg is
risky at best because all electrical products experience voltage
impulses unless on a battery supply.
-doug
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Sreekanth N nampoothiri
Sent: Thursday, September 07, 2006 10:54 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Voltage & Prepeg thickness
Hi All,
=20
What could be the rule of thumb while designing a multilayer
board with HighVoltage.
For eg:- If I have 1KV in one layer, what could be the
required minimum prepeg thickness to the next layer?=20
And what could be the voltage & current carrying capacity
of
FR4 .
=20
BestRegards,
Sreekanth N Nampoothiri
=20
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