Hi Brenton.

17-Nov-03 22:51:02, Brenton wrote to All


 B> GMT From: "Brenton" 
Reply-To: Brenton
 B> , Fidonet AVtech Echo
 B> 

 B> Hi David,

 >> I too want a fixed output - fixed at 6.3V not 5 or 9 or whatever
 >> those things seem to come at.

 B> 

 >> I've been considering Bob's idea of the series regulator - the
 >> LM350 looks
 B> like
 >> it would do, and the component count is lower than the switch-mode,
 >> with a simpler circuit.

 B> I agree that it would be simpler and much easier to build.
 B> However, you will pay for that with efficiency.  The real problem
 B> is that we don't know how much current this thing _really_ draws.
 B> While the plug-pack supplied is rated at 3A actual consumption
 B> might only be 2A during start-up with an operating current o 1A or
 B> less.

 >> What do you think (assuming the 6V ida doesn't work......)?

 B> If the battery tap doesn't work ( which it should ), the next
 B> easiest thing ( from a construction point of view ) would be the
 B> LM350 style regulator, but onc again, I would tap it from the 4th
 B> battery in the line which would be at about the 8V point.  This way
 B> you have less drop across the LM350 and therefore will loose less
 B> in heat dissipation which is the only way a linear regulator can
 B> dissipate the energy.

you still loose the energy only this time as gas in the cells that are
bypassed when the battery is recharged.

still it'd be way easier than the switcher.

 -=> Bye <=-

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