TIDT332 May   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Dimensions
    4. 1.4 Test Setup
      1. 1.4.1 Hardware Setup
      2. 1.4.2 Firmware Setup
      3. 1.4.3 Test Static Operation
      4. 1.4.4 Test Soft-Start Process
      5. 1.4.5 Test Voltage Balance Performance
      6. 1.4.6 Test Bidirectional Transition Process
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Bidirectional Transient
    3. 3.3 Start-Up Sequence

1.4.6 Test Bidirectional Transition Process

This design can naturally deliver bidirectional energy, but the test setup must be well-considered, because the transition mostly depends on the bidirectional source and load. The following process is designed for bidirectional power transition testing:

Note: Because the E-load in this design can only support up to 600V, the bidirectional test in this report used 400V instead of 800V on the primary side, and the relay on the board is shorted manually.

  1. Connect the HV DC source and HV DC load, then at the same time, connect to the HV port of PMP41037 board
    1. Set the DC source voltage to 400V and the current limit to greater than 3A
    2. Set the DC load to 1.4A CC mode, and turn on
  2. Connect the LV port to the 12V bidirectional DC source-load, keep turning off
  3. Power up the 12V bias power
  4. Launch code to the TMDSCNCD280039C card, and keep the CCS connected, click the Resume button in CCS and start the power stage
  5. Gradually increase the HV source to 400V, with less than 1V / ms
  6. Set the LV source, the sink current to –40A, the voltage to 0V, turn on to draw current
  7. Set the LV source, the source current to +40A, change the LV source voltage setting from 0V to 7V, the LV side current tranisents from –40A to +40A
  8. Change the LV source voltage setting from 7V to 5V, the current transients from +40A to –40A