At 01:04 AM 6/24/01 +1000, you wrote:

>
>Spehro, I see this system used in almost every new TV
>and VCR. This seems an accepted standard to clamp the
>TO220 device by the plastic body. Please give more
>information as to why you think this is a bad design.
>I appreciate your input as I work with TO220 pack
>power semis all the time. :o)
>-Roman

The ones I've seen have a stamped spring clip which
isn't as hard on the epoxy. I have no problem with
clamping the body, in fact with the poor design of
the TO220, it's probably the very best thing you
can do.

In a production situation you might be able to get
away with the system described with control on the
torque (maybe by making the bar flexible, and/or
by using auto torque screwdrivers) or by
using a 'V' rather than a dimple to spread the
high concentration of force on a brittle material.

Best regards,


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Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
Contributions invited->The AVR-gcc FAQ is at: http://www.bluecollarlinux.com
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