SLVA934A November   2017  – May 2020 TPS2660

 

  1.   Fault Handling Using TPS2660 eFuse
    1.     Trademarks
    2. 1 Introduction
    3. 2 Fault Status Monitoring Using TPS2660 eFuse
    4. 3 Fault Status Monitoring During Reverse Input Supply Connection
    5. 4 Suggested Fault Handling Methods
    6. 5 Conclusion
  2.   Revision History

1 Introduction

A PLC system is usually powered by an external 24-V DC power supply to provide power to the controller unit, backplane, and I/O modules within the PLC system. Input protection circuits are required to protect the PLC system from system faults such as overcurrent, overvoltage, and overload. Because the input supply connectors are screw type, there can always be a possibility of reverse connections at the input supply.

The TPS2660 eFuse protects downstream circuits from various systems faults including integrated protection to reverse input supply conditions (see the TPS2660 reference design). This device provides status monitor functions like fault indication and load current monitor, which is used by a downstream microcontroller unit (MCU) to take control decisions or a DC/DC converter to do power sequencing.