SDAA050 August   2025 BQ25180 , BQ25186 , BQ25188 , BQ25622E , BQ25638 , BQ25798 , BQ25890 , TPS2121

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Possible Architectures
    1. 2.1 Power Mux
      1. 2.1.1 Other Power Mux Considerations
      2. 2.1.2 Power Mux Over Voltage and Priority Settings
      3. 2.1.3 Power Mux Testing
    2. 2.2 Multicell Charger IC
    3. 2.3 Dual Chargers
    4. 2.4 eFuses (USB OTG)
  6. 3Summary
  7. 4References

2.1.2 Power Mux Over Voltage and Priority Settings

The TPS2121 and TPS2120 have a number of different functional modes, allowing the system designer to configure different source selection operations. These various functional modes are set using different values of resistors, and are described in depth in section 9.4 of the TPS212x data sheet. This is particularly important when switching between different voltage levels. In addition, this must be carefully considered if using a USB-PD source where the voltage can change as different voltage levels are requested.