Tripleplay voltage limits

Started by Trevor, January 08, 2016, 06:06:03 PM

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Trevor

Does anyone know the voltage limit to the tripleplay?

Elantric

any current Android smartphone charger with micro USB connector will work 5VDC at 800mA to charge the internal battery inside FTP Controller.

Trevor

No offense, that's not what I asked, I'm asking what it's "voltage limit".The internal battery is dead, I removed it, I'm using a 3XAAA battery box, alkalines read 4V, lithiums read 6V, is it safe to go 6V is the question.

montyrivers


Trevor

#4
Quote from: montyrivers on January 09, 2016, 07:58:15 AM
Have you tried bugging Fishman for a new battery?

http://www.fishman.com/contact.php
No, specifically no.It's a common cell-phone battery, but to me silly to replace it with the same thing, every time you open up and work on this delicate thing is a chance of screwing something up, external batteries cure that.At some point the batteries in all FTP's will need changing, fortunately/unfortunately mine came puffed.I like the idea of external batteries, and I do a little electronics work.Also, I don't like the idea of an internal lithium that close to the circuit board, it's a small chance but if you've ever played with RC you know the chances and possible incurring damage a rechargeable lithium can cause.My battery box works great, I'd just like to know if it's safe to go 6V.     

admin

#5
QuoteI'd just like to know if it's safe to go 6V.
I would keep it below 5VDC myself

Internal battery is only 3.77VDC



Most IC's today run at 3.3VDC logic levels

http://www.analog.com/media/en/technical-documentation/data-sheets/ADSP-BF531_BF532_BF533.pdf

Trevor

There's usually a safety buffer in small DC electronics, it runs on 5V, I'm assuming it will go much more than 5V, I'd just like some actual specs, but they are non-existent on the fishman site, and when I try to send a support question request it goes straight to a 404 page.

Elantric

#7
Quote, I'm assuming it will go much more than 5V,









I would not count on that  - the max expected input voltage on this design is 5 VDC to charge the internal 3.77 VDC battery
confirmed the FTP DSP  runs at 3.3VDC logic levels
http://www.analog.com/media/en/technical-documentation/data-sheets/ADSP-BF531_BF532_BF533.pdf


But this is definitely within the realm of "No User Serviceable Parts -  Warranty void if altered" 
http://www.fishman.com/support/

Trevor

If that is correct, that it's limit is 3.3, that means it has a buffer in there, because it will run direct off the wall plug 5V wart without the battery installed.The 5V is buffered down to 3.3V, and the extra voltage is held in reserve, so that means it may take more.
I've tried to contact fishman, but keep getting a 404 page after I've filled out the question form, so no help there.I'll just stick with the alkalines until I get confirmation one way of another.