The two terminal restriction is because I have no power supply available,
just the 0-10VDC signal that needs to power the LED. I'd like to get
constant current through the LED over as much of the voltage range as
possible. I'll accept 3 terminals as long as I don't need another power
supply...

THANKS!

Harold


> Just curious, why the two-terminal restriction?
> To me, it sounds like a dandy application for a TL431
> (but then you've got a third terminal and two
> resistors to deal with...)
>
>> I'm loooking for a two terminal constant current device that could be
>> put
>> between an LED and a variable DC supply to hold the LED current at 5mA
>> as
>> the supply varies over a 0-10V range (recognizing we're not going to get
>> it at 0V, but I'd like the widest range possible). So far i've found the
>> Central Semiconductor CCLM5750 which is a nominal 5.750mA, but it takes
>> 4.5V to get 80% of the rated current. Anyone have other ideas?
>>
>> THANKS!
>>
>> Harold
>
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