AVTECH ELECTROSYSTEMS LTD. AVX-S3B-P3-NUFB Manual de instruções - Página 5

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ORIGINAL QUOTATION & CORRESPONDENCE (ABRIDGED)
XXXXX,
Thank you for the fax.
We will reduce the series resistance in the AVX-S3B-P3-NUFB from 3 Ohms to 2.4 Ohms.
The maximum current can then be estimated as:
(12.5V - 1.6V) / (2.4 + 0.6 Ohms) = 3.6A
Regards,
Dr. Michael J. Chudobiak
Chief Engineer
---
Avtech Electrosystems Ltd.
PO Box 265
ph:
Ogdensburg
fax: 1-800-561-1970 or 613-226-2802
New York
USA 13669-0265
http://www.avtechpulse.com/
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> Michael,
>
> I have faxed diode spec to you. Voltage vs Current graph shows 1.3V diode threshold voltage and
0.6-0.7Ohm diode series resistance. The graph is shown only up to 0.4A, but we are going to drive
it up to 4A - other people did that with no big issues.
>
> I think those characteristics should be taken into account when designing diode driver.
>
> Please let me know about driver capability with such diode.
>
>
> XXXXX,
>
> We don't recommend reducing the series resistance because:
>
> A) We aren't sure if the current would actually go up as much as you
> might expect (e.g., the lower resistance may reduce the output voltage
> from the mainframe).
>
> B) The AVO-9G-B-P-NUFB expects to see a 50 Ohm load. After the 4:1
> transformer, the load should be 50 Ohms / 4^2 = 3.1 Ohms for a proper
> transmission line match. Deviating from this value will definitely cause
> ringing and overshoot (due to transmission line reflections).
>
>
> Regards,
> Dr. Michael J. Chudobiak
> Chief Engineer
>
>
>
> Hello, Michael.
>
>
>
> Thank you for the explanation.
----------------------- since 1975 ---
1-800-265-6681 or 613-226-5772
Box 5120
LCD Merivale
Ottawa, Ontario
Canada
K2C 3H4
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