SLUAA84A January   2021  – February 2022 BQ769142 , BQ76942 , BQ76952

 

  1.   Trademarks
  2. 1 Introduction
  3. 2 Circuit Concepts
  4. 3 Configuration
  5. 4 Logic Level FETs
  6. 5 FET Driver Implementation
  7. 6 Transistor Driver Implementation
  8. 7 Controlling LD
  9. 8 Precharge and Predischarge for Low-Side FETs
  10. 9 Summary
  11. 10References
  12. 11Revision History

Using Low-Side FETs with the BQ769x2 Battery Monitor Family

The BQ76952, BQ76942, and BQ769142 battery monitors support high-side N-channel FETs switching PACK+. In some designs the battery electronics designer will need or want to control FETs on the low side of the battery switching PACK-. This document discusses and shows results of switching low-side FETs using BQ769x2 devices and provides an example for designers implementing low-side FETs with devices in the BQ769x2 family.