Uno WiFI Rev 2 - Tech Specs - Input voltage limit [TC-330]

[Bylund]

https://store.arduino.cc/arduino-uno-wifi-rev2

Hi, according to the Arduino Uno WIFI Rev 2 tech specs the upper input voltage limit is 12V. Compared to other boards this seem low. According to the schematics it is using a MPM3610 step-down converter capable of up to 21V input. I am guessing the actual Input Voltage (limit) should be 6-20V like the other UNO's?

[dushyant18033]

Hi, I checked out the datasheet for MPM3610. But there is a table on page 16 of the datasheet which gives the various component specifications to be followed in the power circuit for a particular limit of Vin, which gives some hint that maybe Uno Wifi Rev2 is using the specifications for Vin=12V probably because MPM3610 works much more efficiently for Vin limit of 12V (checkout the typical characteristics starting at page 5 for more information).
So probably the tech-specs on the website is correct in my opinion. Please verify with the schematic for component values used for Vin=12V.

[alranel]

Hello @Bylund. Sorry for the delay! We double checked and you're right: the recommended input voltage for the Arduino Uno Wifi Rev2 is 6-20V. We recommend not to power boards at their maximum voltage because many power supplies can be unreliable and give overshoots, so better to keep some margin.
We will have the spec fixed on the website as well. Thank you for reporting this.

[Bylund]

Hello @alranel. Thank you for the update. We wanted to recommend using the Uno WIFI Rev 2 in automotive applications up to 15V, now we can. Note that as of today there are still no updates to the Uno WIFI Rev 2 spec on the Arduino website.

[per1234]

Hi @Bylund. I hope you won't mind if I reopen this. As you pointed out, the tech specs have not yet been updated as planned, so I think it's best to keep this open so it isn't forgotten.

[per1234]

Note to the assignee: please make sure any update is made to all occurrences of the information:

• https://docs.arduino.cc/hardware/uno-wifi-rev2#panel-teach-spec
• https://store.arduino.cc/products/arduino-uno-wifi-rev2#tech-specs