TIDUF21A December   2022  – January 2023

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Description of Control Logic
      2. 2.2.2 Behavior Throughout Charge Cycle
      3. 2.2.3 Additional Design Recommendations
      4. 2.2.4 Simulation Results
    3. 2.3 Highlighted Products
      1. 2.3.1 TPSI3052-Q1
      2. 2.3.2 TLV7011
      3. 2.3.3 UCC27517A-Q1
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
    3. 3.3 Test Results
  9. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Documentation Support
    3. 4.3 Support Resources
    4. 4.4 Trademarks
  10. 5About the Authors
  11. 6Revision History

3.2 Test Setup

To test the active pre-charge reference design, follow the next steps and recommendations.

  1. Connect a single 5-V input supply to EN and +5V_Pri. This process provides a single trigger signal to power all the devices.
  2. While the high-voltage supply is disconnected, power the TPSI3052-Q1 and check that all voltages are as expected.
  3. Turn OFF 5-V supply, this supply will remain OFF until step 8.
  4. Connect the output-load capacitance positive to J2 (V_Cap) and negative to J4 (-HV).
  5. Connect input high-voltage supply to positive J1 (+HV) and negative to J3 (-HV).
  6. Connect the isolated high voltage rated probes to J2-J4 to measure the output voltage and J1-J3 to measure the input voltage. Connect these probes as far as possible from the switching inductor to avoid any noise coupling.
  7. Connect current probes to measure input current and output current.
  8. Enable the high voltage power supply.
  9. Provide the EN/+5V_Pri and observe the active precharge operation.

  10. Turn OFF the 5-V supply connected to EN/+5V_Pri after precharge has been completed.

  11. Safely discharge the output high voltage capacitors.

  12. Disable high voltage power supply.