SLUUCJ2C july   2021  – august 2023 UCC14240-Q1 , UCC14241-Q1 , UCC15240-Q1 , UCC15241-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 U1 Component Selection
    2. 1.2 Pin Configuration and Functions
  5. 2Description
    1. 2.1 EVM Electrical Performance Specifications
  6. 3Schematic
  7. 4EVM Setup and Operation
    1. 4.1 Recommended Test Equipment
    2. 4.2 External Connections for Easy Evaluation
    3. 4.3 Powering the EVM
      1. 4.3.1 Power on for Start-up
      2. 4.3.2 Power off for Shutdown
    4. 4.4 EVM Test Points
    5. 4.5 Probing the EVM
  8. 5 Performance Data
    1. 5.1  Efficiency Data
    2. 5.2  Regulation Data
    3. 5.3  Steady State Input Current
    4. 5.4  Start-up Waveforms
    5. 5.5  Inrush Current
    6. 5.6  AC Ripple Voltage
    7. 5.7  EN-to-/PG Timing
    8. 5.8  RLIM
    9. 5.9  Fault Protection
      1. 5.9.1 Output UVLO
      2. 5.9.2 Output OVP
    10. 5.10 Shutdown
    11. 5.11 Thermal Performance
  9. 6Assembly and Printed Circuit Board (PCB) Layers
  10. 7Bill of Materials (BOM)
  11. 8Revision History

4.3.1 Power on for Start-up

  1. Verify VIN and +5-V DC bias power supplies are OFF/disabled and no voltage is applied to the UUT
  2. Move EN shorting jumper, SH-J1, to the J3:2-3 EN ON position
  3. Turn on the VIN DC power supply. Verify 24-V is present at TP7-to-TP10
  4. Verify the loads on VDD and VEE are disabled
  5. Turn on the +5-V DC bias power supply. EVM is now enabled with VDD and VEE in regulation under no load conditions.
  6. Verify 20-V is present on VDD-VEE and 5-V is present on COM-VEE
  7. Enable the 80-mA load on VDD-VEE, enable the 10-mA load on COM-VEE
  8. The UCC14240-Q1 is now regulating VDD and VEE and processing 1.6-W of isolated output power
  9. Vary VIN between 21 V<VIN<27 V, vary IVDD between 0 mA<IVDD<80 mA, vary IVEE between 0 mA<IVEE<10 mA.
  10. Insert oscilloscope probes into TP9, TP6 and TP3 for measuring VIN, VDD and VEE start-up, steady state and AC ripple voltage