High peek current while advertisement, nRF52833

RE: High peek current while advertisement, nRF52833

Tellef Goderstad Sunne — Mon, 02 Nov 2020 08:31:18 GMT

That solved it, thank you :)

RE: High peek current while advertisement, nRF52833

Stian Røed Hafskjold — Mon, 02 Nov 2020 07:41:11 GMT

Ok, sorry for the confusion.

The nRF52 has an internal DCDC regulator. In order to use this you have to have two inductors connected to the DCC pin in the nRF52, these two inductors are what I referred to as "DCDC components".

Here is the reference layout when using the internal DCDC regulator: https://infocenter.nordicsemi.com/topic/ps_nrf52833/ref_circuitry.html?cp=4_1_0_6_2_3#unique_439227483

You also need to enable the internal DCDC regulator from the FW running on the nRF52. The easiest way to do this is to just add NRF_POWER->DCDCEN = 1; at the beginning of main.

So, most likely you just need to enable the internal DCDC regulator, and the radio peak currents will be lower.

RE: High peek current while advertisement, nRF52833

Tellef Goderstad Sunne — Mon, 02 Nov 2020 07:03:44 GMT

But it is still much higher than expected when the DCDC regulator on the Online Power Profiler is turned of..? I might have misunderstod you regarding the DCDC components, I don't have an external DCDC regulator, but I use the internal on the CPU to power some sensors through the GPIOs.

RE: High peek current while advertisement, nRF52833

Stian Røed Hafskjold — Fri, 30 Oct 2020 13:13:57 GMT

You can choose to turn off the DCDC regulator in the Online Power Profiler to get closer to the expected current on your design without DCDC components. The nRF52833 is closer to the nRF52840 in terms of current consumption.

RE: High peek current while advertisement, nRF52833

Tellef Goderstad Sunne — Fri, 30 Oct 2020 12:44:04 GMT

Hi,

There is no DCDC components on the product.
Yes, the DCDC regulator n the Power Profiler kit is enabled

RE: High peek current while advertisement, nRF52833

Stian Røed Hafskjold — Fri, 30 Oct 2020 12:36:11 GMT

Hi, do you have DCDC components on your board, and did you enable the DCDC regulator?