Hi team
In the TI brochure, I find that there is a statement that the DCDC is less than the global LDO, 433 mode, Tx maximum output power by 1 dBm.
However, in the manual it is also said that DCDC mode is less power than global LDO.
Now the problem is, I want to transmit more, less power, at maximum Tx power, How do I choose?
Best regards
Alex
Hi Alex,
The DC/DC converter does not need to be enabled when using Boost mode, but is more efficient than the global LDO mode. Without Boost mode the maximum output power possible is less and if the +14 dBm setting is selected without Boost mode it will likely output less than +14 dBm.
So if you want the maximum output power setting then the recommended configuration is: DC/DC enabled, Boost mode enabled, +14 dBm setting.
Please see Section 11 of SWRA640 (CC13xx/CC26xx Hardware Configuration and PCB Design Considerations): https://www.ti.com/lit/swra640 for information on the different CC13xx power supply configurations.
To evaluate this, in SmartRF Studio the user can select (or deselect) "DC/DC Enable" and adjust the "TX Power" setting as desired:
Regards,
Zack
