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

2.1 Manual

A manual power MUX is one in which each path is individually controlled by an external signal (logic or microcontroller). The example of two load switches used in Figure 2-1 is a manual power MUX. There could be one or two EN pins which need to be controlled. This method is generally used when there is already a microcontroller present in the system which can decide under what conditions to enable each input.

GUID-B991E3DC-44B5-4E12-B55D-63355B57C24D-low.gifFigure 2-1 Manual Power MUX using TPS22910 and TPS22912 Load Switches