• State Not Answered
  • Replies 7 replies
  • Subscribers 26 subscribers
  • Views 362 views
  • Users 0 members are here
Attachments (0)
Nordic Case Info
  • Case ID: 285668
Options
nRF5 SDK is not maintained anymore
More Info: Consider nRF Connect SDK for new designs

NRF52840DK power issues. Delayed power on and inductor noise.

user108531

When I connected the usb and turn the DK switch on, the DK didn't turn on. After leaving for a few minutes, the DK started to turn on and off then eventually stables and fully on.

I can turn off or disconnect the usb and when connecting back again, it immediately turns on as it should.

But if I leave it unplug for hours, I'm having the power issues again. So I need to leave it for a few minutes sometimes hours until it turn on again before I can start my work.

Also, for the first few minutes the power stabilize, I can hear a noise that I think came from the inductor near usb or that area.

Please advise.

Parents
  • 0

    Hi, thank you for confirming.

    Can you try removing the battery and see if the problem persists? Also, this noise you describe sounds vaguely familiar but I don't recall the specifics, or if it was related to a power issue on the DK, so I have asked internally if anyone knows what could cause this. The initial response to the "won't turn on for minutes" is that you need to be more "determined" when you move the SW8 from OFF to ON. There have been some issues with customers being to "soft" on the switch.

    Best regards,

    Simon

Reply
  • 0

    Hi, thank you for confirming.

    Can you try removing the battery and see if the problem persists? Also, this noise you describe sounds vaguely familiar but I don't recall the specifics, or if it was related to a power issue on the DK, so I have asked internally if anyone knows what could cause this. The initial response to the "won't turn on for minutes" is that you need to be more "determined" when you move the SW8 from OFF to ON. There have been some issues with customers being to "soft" on the switch.

    Best regards,

    Simon

Children
No Data
Related
Terms of service