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

4 MSP430 + Charge Pump Implementation for Single-Cell Thermostat

The MSP430 + charge pump implementation is shown on the next page. The only external components required for the charge pump circuit are five 1-µF ceramic capacitors. The SNOOZE pin is connected to one of the MSP430’s GPIO pins. In the event that higher current (more than 2 mA) is required, the charge pump automatically exits snooze mode but, in the case of an A/D conversion, it is best practice to disable SNOOZE in software by setting the appropriate MSP430 pin high before the conversion is initiated.

msp430f4794-and-tps60313-block-diagram.gifFigure 4. MSP430F4794 and TPS60313 Block Diagram