SLUUDA3 May   2025 UCC25661

 

  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 Specifications
    4. 1.4 Device Information
    5.     General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  7. 2Hardware
    1. 2.1 Test Setup
      1. 2.1.1 Test Equipment
      2. 2.1.2 Recommended Test Setup
    2. 2.2 Using the EVM with UCC256612
    3. 2.3 Using the EVM with UCC256613
    4. 2.4 Test Points
    5. 2.5 Terminals
    6. 2.6 Test Procedure
      1. 2.6.1 Equipment Shutdown
  8. 3Implementation Results
    1. 3.1 Performance Data and Typical Characteristic Curves
      1. 3.1.1  UCC25661EVM-128 Standalone Standby and Light Load Power
      2. 3.1.2  Efficiency, Load Regulation, Switching Frequency vs Output Current
      3. 3.1.3  Startup
      4. 3.1.4  Enhanced ZCS Avoidance During Soft Start
      5. 3.1.5  Thermal Image
      6. 3.1.6  Output Voltage Ripple
      7. 3.1.7  Load Transient Response
      8. 3.1.8  Loop Response
      9. 3.1.9  Steady State
      10. 3.1.10 X-Capacitor Discharge
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials
  10. 5Additional Information
    1.     Trademarks

3.1.2 Efficiency, Load Regulation, Switching Frequency vs Output Current

Table 3-2 gives the efficiency, load regulation, switching frequency data at various input voltage and at different load currents.

Table 3-2 Performance Data
VIN (V)IIN (mA)PIN (W)VOUT (V)IOUT (A)Operating Frequency (kHz)Operating FrequencyEfficiency (%)
390 507.2 197.808 12.023 15 97.56 Normal 91.17174
390 438.3 170.937 12.024 13 98.43 Normal 91.44422
390 379.2 147.888 12.025 11.25 99.26 Normal 91.47547
390 370.8 144.612 12.027 11 99.38 Normal 91.48411
390 303.7 118.443 12.027 9 100.52 Normal 91.38826
390 253.7 98.943 12.028 7.5 101.54 Normal 91.17371
390 237 92.43 12.028 7 101.86 Normal 91.09164
390 170.01 66.3039 12.028 5 103.35 Normal 90.70356
365 543.4 198.341 12.023 15 85.78 Normal 90.92674
365 470 171.55 12.025 13 86.5 Normal 91.12504
365 406.5 148.3725 12.026 11.25 87.13 Normal 91.18435
365 397.4 145.051 12.027 11 87.24 Normal 91.20723
365 325.6 118.844 12.028 9 87.99 Normal 91.08748
365 272.4 99.426 12.028 7.5 88.6 Normal 90.73079
365 254.6 92.929 12.028 7 88.83 Normal 90.6025
365 184.75 67.43375 12.028 5 89.7 Normal 89.18383
410 480.8 197.128 12.026 15 108.81 Normal 91.50907
410 416 170.56 12.027 13 110.24 Normal 91.66921
410 359.8 147.518 12.028 11.25 111.74 Normal 91.72779
410 351.8 144.238 12.029 11 111.97 Normal 91.73657
410 287.9 118.039 12.029 9 113.99 Normal 91.7163
410 240.3 98.523 12.029 7.5 115.82 Normal 91.56999
410 224.6 92.086 12.029 7 116.53 Normal 91.43952
410 161.54 66.2314 12.029 5 119.72 Normal 90.8104