Re: neat Hall sensor

On Thu, 02 Jan 2025 08:09:16 -0800, john larkin <JL@gct.com> wrote:

On Thu, 02 Jan 2025 09:05:03 -0500, legg <legg@nospam.magma.ca> wrote:
>

On Tue, 31 Dec 2024 15:58:07 -0800, john larkin <jl@glen--canyon.com>
wrote:
>

>
https://www.monolithicpower.com/en/mcs1802.html?srsltid=AfmBOoq2BNuYQ-Ef5ee9o7-gyHDqRkK_xS5TAKb-MgxtjZ6r71FItxXm
>
Really nice, as compared to a shunt and an isolated ADC and all that
stuff. Reasonably accurate, especially above 20c.
>
But they can't be serious about pushing 50 amps through an SO8
package. Or not for long.
>
Their demo board thermal design is kinda silly.
>
>

>
Demo board makes sense to me. Simplest thermal conductivity
test.

>
They used 4 oz copper, hardly practical.

?

What's impractical about 4oz copper in a power circuit?
Are you saying it's not enough?

I'd say it was more than could be expected from a
simple demo board and is typical of higher current
layout in this neck of the woods, where power and
control circuits try not to share the same board or
board layer.

Also, using a part with a 50A full scale in a 25-30A
continuous rated circuit would be normal pactice,
where duty cycle, crest factor or pulse/surge are
anticipated under normal operating conditions.

There are 'better' SMD packages available, if that is your
only concern. You seem to have found some.

RL