SLUUCU3 November   2023

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
      1. 1.1.1 Before You Begin
    2. 1.2 Kit Contents
    3. 1.3 Specifications
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Test Equipment
      1. 2.1.1 Voltage Source
      2. 2.1.2 Oscilloscope
      3. 2.1.3 Multimeters
      4. 2.1.4 Output Load
      5. 2.1.5 Fan
      6. 2.1.6 USB-to-GPIO Interface Adapter
      7. 2.1.7 Recommended Wire Gauge
      8. 2.1.8 List of Test Points, Jumpers, and Connectors
    2. 2.2 Test Setup
      1. 2.2.1 Test and Configuration Software
        1. 2.2.1.1 Description
        2. 2.2.1.2 Features
      2. 2.2.2 Evaluating Split Rail Input
  9. 3Software
    1. 3.1 Using the Fusion GUI
      1. 3.1.1  Opening the Fusion GUI
      2. 3.1.2  General Settings
      3. 3.1.3  Changing ON_OFF_CONFIG
      4. 3.1.4  Pop-Up for Some Commands While Conversion is Enabled
      5. 3.1.5  SMBALERT# Mask
      6. 3.1.6  Device Info
      7. 3.1.7  Phase Commands
      8. 3.1.8  All Config
      9. 3.1.9  Monitor
      10. 3.1.10 Status
    2. 3.2 EVM Configuration Using the Fusion GUI
      1. 3.2.1 Configuration Procedure
  10. 4Implementation Results
    1. 4.1 Performance Data and Typical Characteristic Curves
      1. 4.1.1 Efficiency
      2. 4.1.2 Load Regulation
      3. 4.1.3 Line Regulation
      4. 4.1.4 Transient Response
      5. 4.1.5 Control Loop Bode Plot
      6. 4.1.6 Output Ripple
      7. 4.1.7 Control On
      8. 4.1.8 Control Off
      9. 4.1.9 Thermal Image
    2. 4.2 Test Procedure
      1. 4.2.1 Line and Load Regulation and Efficiency Measurement Procedure
      2. 4.2.2 Efficiency Measurement Test Points
      3. 4.2.3 Control Loop Gain and Phase Measurement Procedure
  11. 5Hardware Design Files
    1. 5.1 Schematic
    2. 5.2 EVM Assembly Drawing and PCB Layout
    3. 5.3 Bill of Materials
  12. 6Additional Information
    1.     Trademarks

4.2.3 Control Loop Gain and Phase Measurement Procedure

The TPSM8S6C24SEVM-1PH includes a 49.9-Ω series resistor in the feedback loop for VOUT. The resistor is accessible at the test points TP16, TP17 for loop response analysis. Use these test points during loop response measurements as the perturbation injecting points for the loop. See the description in Table 5-2.

Table 4-2 List of Test Points for Loop Response Measurements
Test Point Node Name Description Comment
VOUT_A
TP16 CHA Input to feedback divider of VOUT The amplitude of the perturbation at this node must be limited to less than 30 mV.
TP17 CHB Resulting output of VOUT Bode can be measured by a network analyzer with a CH_B/CH_A configuration.

Measure the loop response with the following procedure:

  1. Set up the EVM as described in Section 2.1.
  2. For VOUT, connect the isolation transformer of the network analyzer from TP16 to TP17.
  3. Connect the input signal measurement probe to TP16. Connect the output signal measurement probe to TP17.
  4. Connect the ground leads of both probe channels to TP8.
  5. On the network analyzer, measure the Bode as TP17/TP16 (Out/In).