DC/DC converter on nrf52840

[Sridhar Jonnavittula]

How to enable and populate DC/DC converter on nrf52840? Also how to configure duty cycle for that.

Thanks,

Sridhar

[Andreas]

Hi,

 

The only requirement is that you also populate a 10µH and a 15nH inductor between DCC and DEC4 pins (single 10µH for REG0 DC/DC).See the DC/DC option in the reference layout.

 

Once populated the DC/DC converter is then enabled either by writing to NRF_POWER->DCDCEN if you are not using our Softdevice, or by calling sd_power_dcdc_mode_set() if you are using the Softdevice. Once enabled, the power management unit will lautomatically configure the power system for operation mode that is most efficient for the current load and active components.

 

Best regards,

Andreas

[Sridhar Jonnavittula]

Hi Andreas,

Thanks. I will update the result. I will take support if needed.

Thanks