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LORA TX CURRENT CONSUMPTION numbers specified in the datasheet

viola
Associate III

Hi,

I have couple of  questions regarding the LORA Tx numbers specified in the ds for the stm32wle5.

we are using VDD=3.3V , 22 dBm ,  ~928 Mhz  LORA.       32 Mhz TCXO

we are NOT using the SMPS .     

table 29 in the ds mentions that typical current for the stm32 device in Tx High power mode should be 120 mA.

I want to know what should be the total current for all chip supplies . 

I have couple of questions:

1. If I understand correctly - this table assumes all chip interfaces are disabled. if I have UART enabled and a few other io's toggling - How much current should I add to the 120 mA number ? (roughly)

 

2. since we are NOT using SMPS mode .  How much current should I add to the 120 mA number ? (roughly)

 

3. General question - should I see different subghz current consumption when transmitting LORA vs when transmitting CW ?

 

4. Is there a more accurate way to estimate what should be the total chip current in LORA RX MODE and LORA TX MODE ?

 

Thank you,

Viola

 

 

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