SLAA398A September   2008  – August 2018 MSP430F4794 , MSP430F4794

 

  1.   Using an MSP430™ MCU and TPS60313 to Implement a Single-Battery-Cell Powered Thermostat
    1.     Trademarks
    2. 1 Introduction
    3. 2 DC/DC Converter Basics – PIN vs POUT
    4. 3 TPS60313 Description and Features
    5. 4 MSP430 + Charge Pump Implementation for Single-Cell Thermostat
    6. 5 Thermostat Application Description
    7. 6 Current Measurements – Two Cell and Single Cell
    8. 7 Schematic
    9. 8 Conclusion
    10. 9 References
  2.   Revision History

8 Conclusion

The expected battery lifetime for the MSP430 + TPS60313 single-cell thermostat is quite good with the worst case being about 4.5 years for a AAA battery and almost 13 years for a AA battery. In practice, the self-discharge rate of the battery limits the lifetime of the application more than the current consumption of the microcontroller + dc/dc converter. In conclusion, the TPS603xx family of dc/dc charge-pump converters is an excellent dc/dc converter solution, enabling single-cell MSP430 applications that can maintain very good low-power performance with excellent battery lifetimes.