System ON low power mode with soft device

RE: System ON low power mode with soft device

Sigurd — Thu, 26 Sep 2024 10:41:57 GMT

Hi!

[quote user="Julian_sanchez"]We don't have DCDC components on the PCB, is it possible to disable the DCDC?[/quote]

DCDC is default off. So if you don't have the DCDC components, then you don't need to take any action.

[quote user="Julian_sanchez"]The SAADC is sampling with nrf_drv_saadc_sample() each 10 seconds while the PWM is started with nrf_drv_pwm_complex_playback() with an interrupt. How is the best way to handle these peripherals in the low power mode?[/quote]

Either don't use them that often, and/or fully disable them in your low power mode. nrf_drv_pwm_uninit() / nrf_drv_saadc_uninit()

[quote user="Julian_sanchez"]Does the current consumption decreases if the softdevice is disable? we have read that this is not recommended[/quote]

No, this does not help.

RE: System ON low power mode with soft device

Julian_sanchez — Thu, 26 Sep 2024 10:13:57 GMT

Hi Sigurd, thank you for your response.

We identified indeed that the SAADC or PWM were causing the high current consumption. We don't have DCDC components on the PCB, is it possible to disable the DCDC?

The SAADC is sampling with nrf_drv_saadc_sample() each 10 seconds while the PWM is started with nrf_drv_pwm_complex_playback() with an interrupt. How is the best way to handle these peripherals in the low power mode?
Does the current consumption decreases if the softdevice is disable? we have read that this is not recommended

RE: System ON low power mode with soft device

Sigurd — Thu, 26 Sep 2024 08:54:43 GMT

Hi!

1) If you have DCDC components on the PCB, make sure to enable DCDC mode.

sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);

To lower the current more, you would likely need to disable SAADC and/or PWM.