piclist 2002\12\09\131330a >
Thread: 1:1 Transformer...
www.piclist.com/techref/power.htm?key=transformer
picon face BY : Spehro Pefhany email (remove spam text)



At 06:19 PM 12/4/02 -0500, you wrote:
>Hi All,
>
>I want to build a BASIC FLYBACK to isolate the serial communication on a PCB
>(485).  I want to supply the isolated section by a transformer.  Do you any
>idea for the transformer...

Why exactly would you select the flyback topology for this application?

>I was using a MAX243 with a coilcraft transformer, but it is too
>expensive...

Do you mean MAX253?  It's convenient, but can be replaced with some
standard parts at a component cost savings (not to mention availability).

Usually you design the transformer along with the rest of the circuit for
DC-DC converters. See Pressman, Billings etc. for the gory details.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
EraseMEspeffspamspam@spam@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com

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<5.1.1.6.2.20021209130608.032f0e60@mail.interlog.com>

In reply to: <FOEPKEAFAKECEINAMKEKMEPFCEAA.piclist@iquebec.com>
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