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CCS/MSP430FR5969: Low Power Modes

harikrishna paritala
Intellectual 520 points
Part Number: MSP430FR5969

Tool/software: Code Composer Studio

hi this is harikrishna..

currently i am doing one project based on low power modes by using two AA batteries..so i used LPM3 mode in my project because i need to run RTC in background..after all my testing my board is giving around 120uA in LPM3 mode because in the board i have some component like Flash memory,Voltage Regulator,and one RGB Led and GSM modem(SIM800)..i have tried with all posibilties to get low current in LPM..so finally i have two questions 

1.How to Reduce current consumption in Active mode..while the processing..because all the pheripherals are running in that time it is going to maximum of 170mA..

2.How to Reduce current consumption in LPM3 mode to below 100uA in my project.

it helps me a lot...

thanks..

  • 0
    TI__Mastermind 39255 points
    Hi Harikrishna,
    Answer your question,
    1. It is hard to lower the current consumption in active mode. We usually make the MCU run at active mode as quick as possible to lower the average consumption.
    2. In LPM3 mode, the MCU consume little. So you focus on reducing the other parts consumption. For example, you can let the LED work part-time or lower the using frequency of GSM modem. These are just some hints. You can figure out some way which is the best for your application.

    Best regards,
    Cash Hao

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