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.
Subject: Re: Smallest component to step down 240VAC to 18VDC?
Date: Wed, 9 Oct 2002 03:04:31 -0500
Organization: Posted via Supernews, http://www.supernews.com
References: <email@example.com> <3DA3D84F.EC3E9D0E@scazon.com>
X-Newsreader: Microsoft Outlook Express 5.50.4807.1700
can't you get a small enough transformer? what do they use for the adapters
that come with the laptop?
"Paul Burke" wrote in message
> The little lost angel wrote:
> > Are transformers with a AC->DC circuit the only way to step
> > down mains AC to low DC voltages? Are there no small IC that can
> > convert 240V to something like 16V to 24V range?
> > Reason being... I lost my 16V 4.5A laptop charger and need to
> > make one small enough to pack in my bag. :(
> > The wall wart(?) I'm using now is way too big for that.
> For a charger you'll have to handle the thing, you can get fingers
> across the power pins- you MUST have isolation. A transformer in the
> circuit somewhere is the only acceptable way. Don't even think of trying
> an alternative.
> Paul Burke
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup