The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: "John Jardine"
Subject: Re: 2.5kW-3kW-SMPS-(cheap)-suggestions?
Date: Tue, 17 Dec 2002 23:05:38 -0000
NNTP-Posting-Date: 17 Dec 2002 22:52:50 GMT
X-Newsreader: Microsoft Outlook Express 5.00.2615.200
Frithiof Andreas Jensen wrote
in message news:email@example.com...
> "John Jardine" wrote in message
> > Help!
> > I've little idea of SMPS beyond a 200W DC step-up, so an AC-DC 2.5 to
> > step-down seems an out of reach, nightmare.
> Philips Semiconductors did an application note for an "PRPS" resonant
> converter in "Power Semiconductor Applications" - a book available off the
> net as a pile of pdf files.
> The Philips web site is unfortunately blatantly & utterly usesless, but,
> may have luck with the search engine. You will want the file "APPCHP2.PDF"
> off their site. (Note that this may have changed!!)
> It is a good collection of application notes, with a very practical
> geared at consumer/industrial electronics: most of the designs use plain
> transistors for everything - no pwm chips 'cause they cost money and one
> cannot get spares in Vietnam!
> Anyways, the PRPS converter is a bit hairy to get to work, but it is
> reasonably simple for the power level.
> Hope ths helps.
"PRPS". I'll try and find the PDF. The idea of plain jane transistor
techniques quite appeals to my 'design to a cost' nature. Yes I also can't
understand why Philips has such a useless site. It was bad 3 years ago and
is still bad now.
Vietnam!. memories!, A sales guy told me of a site demo' he attended there
near Hanoi (IIRC). Amused me no end with his description of how the local
site contractors hooked our bare wired equipment, to the bare generator
terminals, using bare hands (survived) and thought nothing of it!.
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup