SNOAA65 December   2020 TLV9022

 

  1.   Introduction
  2.   Design Process
    1.     Voltage Regulation
    2.     Undervoltage Protection With Hysteresis
    3.     Overcurrent Protection
    4.     Final Considerations
    5.     Simulation Results
  3.   Design References
  4.   Design Featured Comparator
  5.   Design Alternate Comparator

Final Considerations

GUID-20201215-CA0I-XV7H-ZL1B-B8Q1R6BXKTQX-low.svg Completed Protection Circuit

If there is a need for window comparators for the voltage and current values, then two channels may be added to this design. Both of the channel outputs are combined by shorting both open-drain outputs together in what is referred to as AND configuration (when either outputs a logic low, the combined output is also low). To have distinct outputs, use a separate pullup resistor for the first channel of the TLV9022. Low-side current sensing with a 10-mΩ sense resistor was used to achieve overcurrent protection at 10A. If a smaller resistance or lower current threshold is needed, you can use an even smaller resistance in combination with an amplifier.