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Using external power on nRF52dk

daguro gravatar image

asked 2017-03-21 00:10:46 +0200

I connected up +5v to the external power pins of the nRF52dk. I see +5 at TP14.

When I set the power switch to 'on', the board does not boot.

Is there something else I should be doing?

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sigurdon gravatar image

answered 2017-03-21 09:39:37 +0200

updated 2017-03-21 09:41:45 +0200

Hi,

It is only the 5V from the USB that is regulated down to 3.3 V through an on-board voltage regulator. The battery and external power supply are not regulated. You can therefore not use 5V on the external power pins.

Allowed voltage level on external supply pins are 1.7 V - 3.6 V.

More information here.

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Asked: 2017-03-21 00:10:46 +0200

Seen: 80 times

Last updated: Mar 21