SLUUCQ1 March   2023 TPS546D24S

 

  1.   Stacking TPS546D24S Two-Phase Evaluation Module
  2.   Trademarks
  3. Description
    1. 1.1 Before You Begin
    2. 1.2 Typical Applications
    3. 1.3 Features
  4. Electrical Performance Specifications
  5. Schematic
  6. 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 Tip and Barrel Measurement
    4. 4.4 List of Test Points, Jumpers, and Connectors
    5. 4.5 Evaluating Single Phase Operation
    6. 4.6 Evaluating Split Rail Input
    7. 4.7 Configuring EVM to Overdrive VDD5
  7. EVM Configuration Using the Fusion GUI
    1. 5.1 Configuration Procedure
  8. Test Procedure
    1. 6.1 Line and Load Regulation and Efficiency Measurement Procedure
    2. 6.2 Efficiency Measurement Test Points
    3. 6.3 Control Loop Gain and Phase Measurement Procedure
  9. Performance Data and Typical Characteristic Curves
    1. 7.1  Efficiency
    2. 7.2  Load and Line Regulation (Measured Between TP22 and TP25)
    3. 7.3  Transient Response
    4. 7.4  Control Loop Bode Plot
    5. 7.5  Output Ripple
    6. 7.6  Power MOSFET Drain-Source Voltage
    7. 7.7  Control On
    8. 7.8  Control Off
    9. 7.9  Control On With Pre-biased Output
    10. 7.10 Current Sharing Between Two Phases
    11. 7.11 Thermal Image
  10. EVM Assembly Drawing and PCB Layout
  11. Bill of Materials
  12. 10Using the Fusion GUI
    1. 10.1  Opening the Fusion GUI
    2. 10.2  General Settings
    3. 10.3  Changing ON_OFF_CONFIG
    4. 10.4  Pop-up for Some Commands While Conversion is Enabled
    5. 10.5  SMBALERT# Mask
    6. 10.6  Device Info
    7. 10.7  Phase Commands
    8. 10.8  All Config
    9. 10.9  Pin Strapping
    10. 10.10 Monitor
    11. 10.11 Status

General Settings

Figure 10-2 shows the General Settings that can be used to configure the following:

  • Vout settings, power-good limits, and margin voltages
  • OC Fault, OC Warn and Fault response
  • OT Fault, OT Warn (Die Temperature) and Fault response
  • Vin on and off UVLO
  • On and Off Config
  • Soft Start (Output rise time), other Turn-On Timing and Turn-Off Timing
  • Switching frequency
  • Compensation

After clicking Write to Hardware to make changes to one or more configurable parameters, the changes can be committed to nonvolatile memory by clicking Store Config to NVM. This action prompts a pop-up, and if confirmed, the changes are committed to nonvolatile memory to store all the modifications in non-volatile memory.

Both the Stack Controller device (U1_P1) and the Stack Follower device (U1_P2) are tied to same bus interface. In a two-phase stacking system, the stack controller receives and responds to all PMBus communication and follower devices do not need to be connected to the PMBus. If the stack controller receives commands which require updates to the PMBus values of one or all of the followers, the stack controller relays these commands to the followers. All commands on this tab are for PHASE = 0xFF.

GUID-BA5033D5-BC1D-4F72-8C76-64AABA45A97E-low.pngFigure 10-2 General Settings

Some commands require the