SLUAAL4 August   2022 BQ21040

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
  4. 2How Temperature Sensing Works on the BQ21040
    1. 2.1 With Adapter Present
    2. 2.2 Without Adapter Present
  5. 3Example Application
    1. 3.1 Required Devices
    2. 3.2 Setup
  6. 4Procedure
    1. 4.1 Detecting Adapter Removal
    2. 4.2 Detecting Adapter Insertion
    3. 4.3 Logical Flowchart
  7. 5Summary
  8. 6References

5 Summary

Through the use of the BQ21040, an MCU capable of supplying 50 uA current, and an NTC thermistor, the procedure described above can be used to obtain temperature measurements even when an adapter is not present on the BQ21040 and the device is operating in battery only mode.