SLVUCW8 October   2024 TPSM82916

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
    5. 1.5 Cautions and Warnings
  7. 2Hardware
    1. 2.1 Setup
      1. 2.1.1 Input and Output Connector Descriptions
  8. 3Implementation Results
    1. 3.1 Test Results
    2. 3.2 Ripple Measurement Setup
    3. 3.3 Modifications
      1. 3.3.1 Input and Output Capacitors
      2. 3.3.2 Configurable Enable Threshold Voltage
      3. 3.3.3 NR/SS Capacitor
      4. 3.3.4 Feedforward Capacitor
      5. 3.3.5 S-CONF Resistor
      6. 3.3.6 Loop Response Measurement
      7. 3.3.7 Single LC Filter Operation
    4. 3.4 Performance Specification
  9. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  10. 5Additional Information
    1. 5.1 Trademarks

3.2 Ripple Measurement Setup

The extremely low noise and low ripple levels of the TPSM82916 necessitate a low-noise test setup for accurately measuring the output voltage ripple. Use the SMA connectors, J1 and J2, to measure the output voltage ripple, before and after the second LC filter. Do not use a normal 10x oscilloscope probe with a high-impedance termination to the oscilloscope. Instead, connect the SMA connector directly to the oscilloscope with a coaxial (coax) cable through a DC blocker. A DC blocker enables the use of the smallest V/div setting on the oscilloscope to view the ripple. To prevent noise pickup and block reflections on the coax cable, the oscilloscope must be set to full bandwidth (BW) and DC coupling with a 50Ω termination.