SLUUCW3 October   2023 TPS62843

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 Setup
      1. 2.1.1 Input/Output Connector Descriptions
      2. 2.1.2 Hardware Setup
    2. 2.2 Modifications
      1. 2.2.1 Input and Output Capacitors
      2. 2.2.2 Adjusting the Output Voltage
      3. 2.2.3 Loop Response Measurement
  9. 3Implementation Results
  10. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials
  11. 5Additional Information
    1. 5.1 Trademarks

2.2.3 Loop Response Measurement

The loop response of the EVM can be measured with two simple changes to the circuitry. First, cut the trace between the VOS pin and the output capacitor on the top layer. This change is shown in Figure 3-1. Second, place a 10-Ω resistor across the resistor pads on the back of the PCB at Rx3. The pads are spaced to allow installation of an 0603-sized resistor. With these changes, an ac signal (100-mV, peak-to-peak amplitude recommended) can be injected into the control loop across the added resistor. Details of measuring the control loop of DCS-Control devices are found in How to Measure the Control Loop of DCS-Control™ Devices.

TPS628436EVM-030 TPS628437EVM-030 TPS628438EVM-030 Loop Response Measurement Modification Figure 2-1 Loop Response Measurement Modification