Does charge cord length effect Mintyboost efficiency?

by lee321987 on Mon Feb 04, 2013 11:49 pm

Hello.
Since trace length is so important with switch mode power supplies, I'm wondering if it would be worth it to hack together some really short cords to charge my devices.

Would there be much efficiency gained from going from a 3-foot cord to a 6-inch cord?
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Re: Does charge cord length effect Mintyboost efficiency?

by adafruit_support_bill on Tue Feb 05, 2013 6:36 am

That is a very good idea. All things being equal (wire gauge etc) a short cord will have lower resistance and therefore lower voltage drop and wasted power under load. Long skinny cords do cause charging problems with many phones.
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Re: Does charge cord length effect Mintyboost efficiency?

by lee321987 on Tue Feb 05, 2013 4:09 pm

Thank you.
But what about the inductance and capacitance of long cords?
Don't these have a big effect on SMPS's?
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Re: Does charge cord length effect Mintyboost efficiency?

by adafruit_support_bill on Tue Feb 05, 2013 5:17 pm

Not really. At that point it is all DC going to the phone.
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