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: "Tom Faloon"
Subject: Re: Doubling wallwart power rating
Date: Sun, 6 Oct 2002 20:19:58 +0100
NNTP-Posting-Date: Sun, 6 Oct 2002 20:53:42 +0000 (UTC)
X-Newsreader: Microsoft Outlook Express 5.00.2615.200
Increasing ventilation won't permit a appreciable increase in output power.
(Maybe a few % at a rough guess) Find data sheets for typical components,
and look at the derating curves provided by the manufacturer.
My advice is - don't drill holes in the plastic case of a wall wart, because
it provides a safety barrier to prevent users from coming in contact with
dangerous voltages - typically 120 V or 230V depending on where you live.
Adding vent holes allows provides the possibility of users touching these
high potentials, due to conductors entering the case.
N. Thornton wrote in message
> Wall warts come in plastic cases, which must be very poor heat
> dissipators. If vent holes are added top and bottom, I wonder what
> sort of power out increase one could get.
> More TF cooling = more i flow acceptable.
> More diode cooling = more i flow acceptable also.
> Anyone have an idea what sort of gains we might be looking at?
> Regards, NT
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup