deratings are
Prove it, Ass. Between marginal components, the ROHS hoax and crappy designers, like you, it doesn't stand a chance.
Eeyore wrote in news: snipped-for-privacy@hotmail.com:
Maybe true, maybe not. Consistency is better, but that just means makers can claim better specs for a design. If they can make money by narrowing the spec margin, they will. You still need to uprate, just not as much. And where there is call for several similar parts with slightly varied specs, it is sensible to uprate to one common spec and save with bulk buying.
Eeyore wrote in news: snipped-for-privacy@hotmail.com:
It's logically correct. If we forget margin-pushing exercises, you have two choices, lower, or higher. Running at lower voltage is obviously the better choice out of those two. Not just better, but taking the other choice can cause explosions.
You've not been listening in the right places then.
It also comes down to availability and whether an item is bulk produced or not.
Speccing a bulk-buy component against a similar one that is not in popular usage will affect the price you'd pay.
Buying 105 Deg C rated caps where 85 Deg C will do the job with a decent margin is not good purchase practice, but you may well find that 'your' component is cheaper in the 105 deg C version simply because there is a huge volume going to someone like LG or Samsung.
Peter
-- Peter A Forbes Prepair Ltd, Rushden, UK snipped-for-privacy@easynet.co.uk
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