Enable DC to DC converter in NCS nRF Connect

RE: Enable DC to DC converter in NCS nRF Connect

runsiv — Wed, 28 Aug 2024 08:31:29 GMT

Hi again, just so that I know, is this a DK or a custom board?

If you use custom board with nRF52840 default value for CONFIG_BOARD_ENABLE_DCDC_HV is 'y' which means that you would use DCDC convertor in high voltage mode. This should be accordance with your hardware design where you would use 10 uH inductor between VDD and DCCH.

If you use a DKthe system enters High Voltage mode when the supply voltage is only connected to the VDDH pin and the VDD pin is not connected to any voltage supply.

Regards

Runar

RE: Enable DC to DC converter in NCS nRF Connect

erik1024 — Mon, 26 Aug 2024 22:52:58 GMT

Hello Runar,

The CONFIG* settings look OK. I continue to be unsure about how to set the DCCH voltage. Until something better comes along, I am copying a nrfx-based example that sets DCCH with a direct register write (enums are provided in SDK includes). It seems like there should be an approach that sets the voltage in a Kconfig file, but I haven't found one. The example I cited sets the voltage for the dongle (I don't recall the example's exact title).

Thanks,
Erik

RE: Enable DC to DC converter in NCS nRF Connect

runsiv — Mon, 26 Aug 2024 12:58:45 GMT

Hi Erik.

How did it go?

Regards

Runar

RE: Enable DC to DC converter in NCS nRF Connect

erik1024 — Tue, 20 Aug 2024 05:43:05 GMT

I'm using v2.6.1. I'll give those a try. In addition to enabling the DC-DC converter, there is also a voltage register that is in another SOC block. I think that's an issue, too.

Thanks,

Erik

RE: Enable DC to DC converter in NCS nRF Connect

runsiv — Mon, 19 Aug 2024 06:55:47 GMT

Hi Erik

Which version of NCS are you using? In your prj.conf set CONFIG_BOARD_ENABLE_DCDC=Y to enable the DCDC converter. HV you set CONFIG_BOARD_ENABLE_DCDC_HV=y

Regards

Runar