[time-nuts] SMPS or conventional?

[Hal Murray]

[Old mail, context is TECs]

bruce.griffiths at xtra.co.nz said:
> If the drive current ripple is too high fatigue failure from cyclic
> thermomechanical stress can be significant. 

Do good data sheets say anything about that?

Is there a frequency term in there?  Can I use PWM, which is as much ripple as 
you can get, as long as the frequency is high enough?  If yes, ballpark of how 
high?

Physically, where is the heat/cold generated?  Is it mostly at the junction?

-- 
These are my opinions.  I hate spam.