How to reduce current consumption on NUCLEO-WL55JC ?

[LMesn.1]

Hello, i'm using the NUCLEO-WL55JC board.

I am using the LoRaWAN_End_Node example which works fine. However I reach an operating current of around 50mA.

Do you have an idea for a solution?

Have a good day !

[Imen.D · Accepted solution]

Hello @LMesn.1​ ,

The following features are implemented to reduce the current consumption:

• The core logic is supplied by the low-power voltage regulator to reduce the quiescent current.
• The Flash memory can be switched off (power-down mode and clock gating) in LPSleep mode. The Flash memory can also be switched off in LPRun mode when the application processor executes from SRAM1.
• The system clock is limited to 2 MHz. The MSI internal RC oscillator can be selected as it supports several frequency ranges, with a small device total consumption (such as 48 µA in LPSleep, Flash memory off, at 100 kHz). 

Please refer to this AN5568 "Ultra-low-power features of STM32WL Series microcontrollers", it may be helpful for you.

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Imen

[LMesn.1]

Thank you very much, i will try all of this.

Have a good day.

[LMesn.1]

Hello i applied your advice, and i also changed the supply mode and everything is good. Thank you !