Re: 250mA voltage clamp
- From: budgie <me@xxxxxxxxxxx>
- Date: Mon, 12 Dec 2005 16:07:51 +0800
On Mon, 12 Dec 2005 03:24:21 GMT, the.other.Jim@xxxxxxxxxxx wrote:
>On Sun, 11 Dec 2005 13:40:32 -0800, "Walter Harley"
><walterh@xxxxxxxxxxxxxxxxxxxx> wrote:
>>
>>And in answer to Jim's question: it takes about 300mA draw for the internal
>>impedance of the supply to drop the voltage sufficiently. I'd rather avoid
>>a shunt regulator if I can, so as to avoid unnecessary heating. The
>>max-load condition is unusual and is expected (though not guaranteed) to
>>last only a short time; 99% of the time the load is expected to be only 30mA
>>or so.
>>
>
> OK, a DC-DC converter, buck/boost type between your source and
>load would solve all your problems at 80% efficiency. And be much
>easier to implement than some op-amp and pass element scheme.
Surely replacing the highly unregulated power supply would be easier still? I
fail to see the point in spending time building a fix for a simple sub-assembly
that has a problem, when another PSU would solve it.
.
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- Re: 250mA voltage clamp
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- Re: 250mA voltage clamp
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