Using STM32WLE5 sub-GHz in high-power mode (22 dBm) with internal LDO

[viola]

Hi,

I just want to make sure that it is possible Using STM32WLE5 SUBGHZ IN HIGH-POWER MODE (22 DBM) , higher frequency band , WITH THE INTERNAL LDO  ?   (without the internal SMPS )

I am asking because i see in the CUBE-MX under the tools tab that there is no option to select "high-power" when selecting "SMPS OFF" 

Thank You,

Viola

[STTwo-32 · Accepted solution]

Hello @viola 

As you can see on the chapter 4.3.3 of the RM0461, the transmitter for high output power does not need SMPS to be configured :

 For the CubeMX part, can you please give more details (how to reproduce).

Best Regards.

STTwo-32

[viola]

Hi ,

As you can see in the picture below , I dont have the option for "high power" when "SMPS"  is OFF

[STTwo-32]

Thank you so much for this escalation. It is sent to the CubeMX team for update on the future (under internal ticket number 195795). That may depend on the available data for simulation (test results...) .

Best Regards.

STTwo-32

[viola]

Thank you, waiting for your reply.

Also, in the clock section tab in the CUBE-MX I dont see any mention of the RF-PLL clock. 

if i understood correctly - in order to work with the LORA SUB-GHZ BLOCK i need to supply a 32 Mhz HSE clock . 

I dont see in the clock section tab in the CUBE-MX any mention of this must -have 32 mhz HSE clock . it seems any clock source is possible.   is the clock section tab in the CUBE-MX doesnt represent the CLOCK tree in the STM32WLE5 ?

Thank you

Viola

[STTwo-32]

Hello @viola 

For the original question of this post (possibility of using LDO for Higfh Power mode) I've answer it on the first comment.

For the Internal ticket, it is not guarantee that this will happened soon since it may need to be tested on the same conditions. It may take several versions.

For the New question, could you please create a new post for this question with more details on your issue (some screenshots may help too) after selecting the original answer of this post as best Answer. 

Best Regards.

STTwo-32

[viola]

Hi STTwo-32,

Regarding the Internal ticket - I just want to add that you can see the problem even if you open example code for the nucleo board in the cubemx for STM32WL that uses the subghz block and you will see the problem.

Thank you,

Viola