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VDerg
Beginner
905 Views

Unexpected power from U1 on arduino breakout board

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I just received a kit with Intel Edison and Arduino breakout board.

I have first attempted to power it with a 9V 800mA adapter. The board booted and I was able to flash the firmware, etc.

However, I have noticed that the switching regulator was very hot - 56C. Then I checked the voltages and found that the bus marked as "5V" on the schematic actually had 6.45V.

Since I needed 5V or below for my project, I tried to power the board using USB bus from a USB battery module. This works, the board boots but now the "5V" bus has only 4.5V. Checking the voltage at the USB port gives 4.88V - well within spec.

All configuration is standard - I have not changed anything besides fastening Edison to the Arduino breakout board and applying power.

Questions:

* should U1 heat up that much ? It is above pain threshold (55C).

* should we see 6.45V voltages on "5V" bus ? They seem to be close to tolerance for ICs on the board.

* I originally though to use 12V power - this is within specs, but if this nudges 6.45V higher I am afraid some ICs can be damaged.

Suggestions are welcome !

thank you

Vladimir Dergachev

1 Solution
Diego_V_Intel
Employee
51 Views

Hi volodya,

I'd say that there is something wrong with the voltage regulator. I have never noticed an increase in temperature while using the board, and I have never gotten a value around 6.45V on the 5V bus. I recommend you to submit a warranty ticket to receive further help from the Warranty Team. Use the following form to submit the ticket: http://www.intel.com/support/mailform/maker/edisonwarrantyemail.htm Intel Support

Regards,

Diego

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Diego_V_Intel
Employee
52 Views

Hi volodya,

I'd say that there is something wrong with the voltage regulator. I have never noticed an increase in temperature while using the board, and I have never gotten a value around 6.45V on the 5V bus. I recommend you to submit a warranty ticket to receive further help from the Warranty Team. Use the following form to submit the ticket: http://www.intel.com/support/mailform/maker/edisonwarrantyemail.htm Intel Support

Regards,

Diego

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