SLUUB60B May   2015  – August 2021 TPS544B25 , TPS544C25

 

  1.   Trademarks
  2. 1 Introduction
  3. 2 Description
    1. 2.1 Typical End-User Applications
    2. 2.2 EVM Features
  4. 3 EVM Electrical Performance Specifications
  5. 4 Schematic
  6. 5 Test Setup
    1. 5.1 Test and Configuration Software
      1. 5.1.1 Description
      2. 5.1.2 Features
    2. 5.2 Test Equipment
    3. 5.3 The PWR-681EVM
    4. 5.4 List of Test Points, Jumpers ans Switch
  7. 6 EVM Configuration Using the Fusion GUI
    1. 6.1 Configuration Procedure
  8. 7 Test Procedure
    1. 7.1 Line/Load Regulation Measurement Procedure
    2. 7.2 Efficiency
    3. 7.3 Bode Plot Measurement Procedure
    4. 7.4 Equipment Shutdown
  9. 8 Performance Data and Typical Characteristic Curves
    1. 8.1  Efficiency
    2. 8.2  Load Regulation
    3. 8.3  Line Regulation
    4. 8.4  Transient Response
    5. 8.5  Output Ripple
    6. 8.6  Control On
    7. 8.7  Control Off
    8. 8.8  Overcurrent Protection
    9. 8.9  Control Loop Bode Plot
    10. 8.10 Thermal Image
  10. 9 Fusion GUI
  11. 10EVM Assembly Drawing and PCB Layout
  12. 11List of Materials
  13. 12Revision History

6.1 Configuration Procedure

  1. Adjust the input supply to provide 4 VDC, current limited to 1 ADC.
  2. Apply the input voltage to the EVM. See Figure 5-1 for overview of the EVM and its connections.
  3. Launch the Fusion GUI software. See the screen shots in Section 9 for more information.
  4. Configure the EVM operating parameters as desired.
  5. VSET pin is pulled up to BP3 on the EVM, so the VOUT_COMMAND at boot up is restored from the internal EEPROM. The SYNC/RESET_B pin is configured to SYNC function under this setup. In order to use VSET or RESET_B function, proper resistor of R19 should be populated and resistor R18 should be removed. Please see Datasheet for more details.
  6. S1 on the EVM provides the option to use the external temperature sensor Q1 on the EVM.
    Note:

    To read the external temprature value on PMBus, the bit 8 (SS_DET_DIS) in (E5h) MFR_SPECIFIC _21 register needs to be set to 1. Otherwise, the READ_TEMPERATURE_2 will always return 25°C.

  7. With an input of 4 VDC, the internal configuration circuitry will be powered and active but the device will still be in UVLO and outputs off.