SLUUD88 April   2025

 

  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
  7. 2Hardware
    1. 2.1 EVM Setup and Operation
      1. 2.1.1 Recommended Test Equipment
      2. 2.1.2 External Connections for Easy Evaluation
      3. 2.1.3 Powering the EVM
    2. 2.2 Test Points
    3. 2.3 Oscilloscope Probe Points
  8. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 Assembly and Printed Circuit Board (PCB) Layout
    3. 3.3 Bill of Materials (BOM)
  9. 4Additional Information
    1. 4.1 Trademarks

2.1.3 Powering the EVM


UCC34141EVM-116

WARNING:
  • Hot Surface. Contact can cause burns. U1 package surface can reach temperatures of 45°C above ambient. Do not touch!
  • Do not test this EVM unless you are trained in the proper safety, handling and testing of power electronics.

Power on for Startup

  1. Verify VIN and +5V DC Bias power supplies are off/disabled and no voltage is applied to the UUT
  2. Move shorting jumper, SH-J1, into the J2:2-3, EN ON position. NOTE: removing the shorting jumper, SH-J1 also results in EN ON.
  3. Turn on the VIN DC power supply. Verify 12V is present at TP1-to-TP3
  4. Verify the loads on VDD and VEE are disabled
  5. Turn on the +5V DC bias power supply. EVM is now enabled with VDD and VEE in regulation under no load condition.
  6. Verify +18V present on VDD-COM, and -5V present on VEE-COM
  7. Enable the load on VDD, enable the load on VEE
  8. The UCC34141-Q1 is now regulating VDD and VEE and processing ~0.5W of isolated output power
  9. Vary VIN between 5V<VIN<20V, vary IVDD between 0mA<IVDD<83mA, Vary IVEE between 0mA<IVEE<6mA
  10. Insert oscilloscope probes into TP9, TP10 and TP11 for measuring VEE, VDD and VIN startup, steady state and AC ripple voltage

Power off for Shutdown

  1. Move shorting jumper SH-J1 into the J2:1-2, EN OFF position
  2. Turn off +5V, DC bias power supply
  3. Disable IVDD load
  4. Disable IVEE load
  5. Turn off VIN power supply