Jim,
I agree with your take on this. Voltage is not mentioned because the norm
with a capacitor is that the cap is rated as high or higher then the maximum
voltage it will be exposed to.
Tim
[Denver CO]
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----- Original Message -----
According the the gecko white papers(verbatum), "If a linear regulated or
a switching power supply is used then a large capacitor should be placed
across the output terminals. A 2000uF-10000uF capacitor should do."
That is why I chose a 4700uF cap. for the power supply output terminals...
It's about right in the middle of Mariss' suggestion of a capacitor for a
switching power supply.
He wasnt specific as to what voltage rating for this cap, he was only
specific as to what uF value (2,000-10,000uF)
Your formula for computing the value of a capacitor, I think, is for when
building your own power supply, in conjunction with a bridge rectifier and
transformer.
I dont think this applies to when you are using a regulated or switching
power supply. The cap mentioned above, is placed on the output terminals to
insure that the ripple current stays within the demand of the drivers
current requirements. That is what I get from the papers. I may be wrong
about this though.
Thanks
Regards,
Jim
