SLUUBH3A November   2016  – February 2022 TPS546C20A

 

  1.   Trademarks
  2. 1 Description
    1. 1.1 Before You Begin
    2. 1.2 Typical Applications
    3. 1.3 Features
  3. 2 Electrical Performance Specifications
  4. 3 Schematic
  5. 4 Test Setup
    1. 4.1 Test and Configuration Software
      1. 4.1.1 Description
      2. 4.1.2 Features
    2. 4.2 Test Equipment
      1. 4.2.1 Voltage Source
      2. 4.2.2 Multimeters
      3. 4.2.3 Output Load
      4. 4.2.4 Oscilloscope
      5. 4.2.5 Fan
      6. 4.2.6 USB-to-GPIO Interface Adapter:
      7. 4.2.7 Recommended Wire Gauge
    3. 4.3 Recommended Test Setup
    4. 4.4 List of Test Points, Jumpers and Connectors
  6. 5 EVM Configuration Using the Fusion GUI
    1. 5.1 Configuration Procedure
  7. 6 Test Procedure
    1. 6.1 Line and Load Regulation and Efficiency Measurement Procedure
    2. 6.2 Control Loop Gain and Phase Measurement Procedure
    3. 6.3 Efficiency Measurement
  8. 7 Performance Data and Typical Characteristic Curves
    1. 7.1  Efficiency
    2. 7.2  Load Regulation
    3. 7.3  Line Regulation
    4. 7.4  Transient Response
    5. 7.5  Output Ripple
    6. 7.6  Control On
    7. 7.7  Control Off
    8. 7.8  Current Sharing Between Two Phases
    9. 7.9  Control Loop Bode Plot
    10. 7.10 Thermal Image
  9. 8 EVM Assembly Drawing and PCB Layout
  10. 9 Bill of Materials
  11. 10Screenshots
    1. 10.1 Fusion GUI Screenshots
  12. 11Revision History

5.1 Configuration Procedure

  1. Adjust the input supply to provide 4 VDC, current limited to 1 A.
  2. Apply the input voltage to the EVM. Refer to Figure 4-1 for connections and test setup.
  3. Launch the Fusion GUI software. Refer to the screenshots in Section 10 for more information.
  4. Configure the EVM operating parameters as desired.
  5. VSEL and SS pin resistors on the EVM would program VOUT_COMMAND and TON_RISE at power up. By default, the device would ignore the values stored in the internal non-volatile memory and write corresponding registers with the resistor programmed value. If the DIS_VSEL bit in OPTIONS (MFR_SPECIFIC_21) (E5h) is modified to 1 (default 0), the initial VOUT_COMMAND would be same as the value stored in the internal non-volatile memory. Please see the data sheet for more details.

By default, U1 is configured as a loop controller, U2 is configured as loop follower, and the PMBUS address for U1 is 36 decimal and for U2 is 37 decimal. These two addresses are fixed.

Both device can be configured or monitored through PMBUS interface at different address.