DCDC and receiving distance

[linggan5you]

hello, when I use the chip nrf51822(3rd generation),I find that when I open DCDC function,the ability of chip receiving msg is weaken.the receiving distance is shorter a half. I open it at the chip initialization and keep it all the time. I want to know weather there are some special operation needed that I don't know.please give me some guidance,thanks!

[Stefan Birnir Sverrisson]

Hi

Your observation does not sound familiar to me. There is not much of a special operation required to operate the DCDC. You must however have a third revision nRF51 chip, the DCDC schematics enabled, and Softdevice S110 8.0.0 or S120 2.0.0 or more recent. Then it is only matter of enabling the DCDC with a call to sd_power_dcdc_mode_set. Further description is provided on this thread.