Hi Paul,

Well, actually, I have never tried it with a darlington, but it certainly
did happen to me with my NPN power transistors in my power supply when they
got hot, until I placed a resistor from base to emitter (it was actually
100 ohms).

Are you saying that it probably won't happen with darlingtons? Perhaps you
are right,but if so,I don't understand why not.

Sean


At 08:37 AM 10/18/99 +1000, you wrote:
>Sean H. Breheny wrote:
>
>> No, not enough PCB leakage, BUT if the darlington gets hot, couldn't
>> the input BJT turn itself on  due to CB junction leakage, unless we
>> have such a resistor at the input?
>
>  Wow!  I didn't realise that happened with Silicon!
>--
>  Cheers,
>        Paul B.
>
|
| Sean Breheny
| Amateur Radio Callsign: KA3YXM
| Electrical Engineering Student
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