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Auto laptop 12V/mains switchover design | 26 comments (26 topical, 0 editorial)
Re: Auto laptop 12V/mains switchover design (3.00 / 0) (#21)
by DamonHD (d@hd.org) on Sun Jul 22nd, 2007 at 04:41:53 PM MST
(User Info) http://www.earth.org.uk/

Hi Nando,

The laptop mains adaptor is very good, and draws undetectably low power (I think << 2W) when it has no load.

Thus I am simplifying my design as you suggest and removing the mains transformer on the input side.

I am also connecting the OVs of the mains adaptor and 20V DC/DC converter supply together directly.

I am however still planning on switching between the mains adaptor and the DC/DC converter in the positive line with the relay.  More details when I've built and tested...

Rgds

Damon

[ Parent ]



Auto laptop 12V/mains switchover design | 26 comments (26 topical, 0 editorial)

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