imsai 2

From: Dwight Elvey <elvey_at_hal.com>
Date: Tue Aug 17 21:15:43 1999

allisonp_at_world.std.com (Allison J Parent) wrote:
> Then again having designed a
> few, once you've done it you learn... mostly everything they taught you
> was far from enough. that and fixing all those that were really not so
> well designed.

Hi
 My experience was that during the early stages of testing, I
had to replace a lot of power transistors. No matter what
you do, you still have to turn it on and microseconds later
the fuse blows along with one or more solid state device.
 Still, well done switchers are more robust than most analog
supplies. As a design issue, switchers do like to run at
specific output currents. They are not usually happy with
a large variation in loads.
 Because of power dissipation, I had to build a four quadrant
output switcher ( essentially a switcher amplifier ). There
was a lot of smoke before I got it to work right.
Dwight
Received on Tue Aug 17 1999 - 21:15:43 BST