SLVAFJ1 February   2023 TPS2121

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
    1. 1.1 Design Example Specification
  4. 2Design Considerations
    1. 2.1 Highest Voltage Operation Scheme (VCOMP)
    2. 2.2 Output Voltage Dip and Switchover
    3. 2.3 Overvoltage Calculation
  5. 3Test Results
    1. 3.1 Seamless Switchover from Main Power (IN1) to Backup Power (IN2)
    2. 3.2 Seamless Switchover from Backup Power (IN2) to Main Power (IN1)
  6. 4Summary
  7. 5References

4 Summary

Automatic switchover design without using MCU GPIO is described in this application note. The described design allows MCU to go and stay in sleep mode to minimize battery power consumption in required application. TPS2121 supports Highest Voltage Operation mode (VCOMP) and seamless transition without interrupting normal operation. This application note described the design example and experimental results to achieve seamless switchover of the power sources as well as standby and leakage current of the design.