SLVAE51A November   2018  – October 2020 LM7310 , TPS2100 , TPS2101 , TPS2102 , TPS2103 , TPS2104 , TPS2105 , TPS2110 , TPS2111 , TPS2111A , TPS2112 , TPS2112A , TPS2113 , TPS2113A , TPS2114 , TPS2114A , TPS2115 , TPS2115A , TPS2120 , TPS2121 , TPS25947

 

  1.   Trademarks
  2. 1What is a Priority Power MUX?
  3. 2Control Method
    1. 2.1 Manual
    2. 2.2 Automatic
    3. 2.3 Both - Automatic + Manual Override
  4. 3Power MUX Topologies
    1. 3.1 Discrete
    2. 3.2 Semi-Integrated
    3. 3.3 Fully Integrated
  5. 4Switchover Method
    1. 4.1 Break-Before-Make vs. Diode Mode
    2. 4.2 What is Seamless Switchover?
    3. 4.3 Output Voltage Drop
    4. 4.4 Inrush Current
  6. 5Additional Protection
    1. 5.1 Overvoltage Protection
    2. 5.2 Overcurrent Protection
  7. 6Summary
  8. 7References
  9. 8Revision History

2.3 Both - Automatic + Manual Override

There are some Power MUX solutions which offer the flexibility to be used in a automatic configuration and be controlled by a manual control signal. The TPS212x family of Power MUX solutions can have a default (automatic) priority, but then be overriden by an external microcontroller if needed. This method is useful in applications which will have a default priority for most of its operation, but there will be some modes (such as diagnostics) requiring manual control to force which path is enabled.

GUID-91CCD95A-F0BE-43D8-B491-8B3C8365A2AB-low.pngFigure 2-3 Automatic Power MUX with Manual Override using TPS2120