SLUUD60 October   2024 UCG28826

 

  1.   1
  2.   Description
    1.     Get Started
  3.   Features
  4.   Applications
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
    5. 1.5 General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  6. 2Hardware
    1. 2.1 Additional Images
      1. 2.1.1 Using the EVM on a Load with USB-C PD Communication
      2. 2.1.2 Using the EVM on a Load Without USB-C PD Communication
  7. 3Implementation Results
    1. 3.1 Electrical Performance Specifications
    2. 3.2 Test Setup
      1. 3.2.1 Test Setup Requirements
      2. 3.2.2 Test Setup Diagram
      3. 3.2.3 Test Points
    3. 3.3 Performance Data and Typical Characteristic Curves
      1. 3.3.1  Efficiency Result of 4-Point Average on 20VOUT
      2. 3.3.2  Efficiency Result of 4-Point Average at 15VOUT
      3. 3.3.3  Efficiency Result of 4-Point Average at 9VOUT
      4. 3.3.4  Efficiency Result of 4-Point Average at 5VOUT
      5. 3.3.5  Efficiency Typical Results
      6. 3.3.6  Output Characteristics
      7. 3.3.7  Key Switching Waveforms
      8. 3.3.8  Switching Frequency vs Load
      9. 3.3.9  Output Ripple Voltage
      10. 3.3.10 Load Transient Response
      11. 3.3.11 Line transient Response
      12. 3.3.12 Surge Test
      13. 3.3.13 Short Term Overload Operation
      14. 3.3.14 CCM operation
      15. 3.3.15 EN55022 Class B Conducted EMI Test Result
      16. 3.3.16 Thermal Images at Full Load (20 V and 3.25 A)
  8. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Transformer Details
      1. 4.3.1 RLTI-1464 (RENCO)
      2. 4.3.2 750847341Rev02 (WURTH)
      3. 4.3.3 TSD-5191 (Premier Magnetics)
      4. 4.3.4 Transformer Summary
    4. 4.4 Bill of Materials
  9. 5Appendix - Efficiency
    1. 5.1 Efficiency Result of 4-Point Average on 20VOUT
    2. 5.2 Efficiency Result of 4-Point Average on 15VOUT
    3. 5.3 Efficiency Result of 4-Point Average on 9VOUT
    4. 5.4 Efficiency Result of 4-Point Average on 5VOUT
    5. 5.5 Efficiency Typical Results
  10. 6Additional Information
    1.     Trademarks

3.3.16 Thermal Images at Full Load (20 V and 3.25 A)

Figure 3-55 to Figure 3-62 shows the thermal images at full load for different line voltage

UCG28826EVM-093 VIN = 90VAC, Top SideFigure 3-55 VIN = 90VAC, Top Side
UCG28826EVM-093 VIN = 115VAC, Top SideFigure 3-57 VIN = 115VAC, Top Side
UCG28826EVM-093 VIN = 230VAC, Top SideFigure 3-59 VIN = 230VAC, Top Side
UCG28826EVM-093 VIN = 265VAC, Top SideFigure 3-61 VIN = 265VAC, Top Side

The hottest component on EVM at this test condition is the bridge rectifier diodes. The polygon connecting to bridge rectifier needs to be exposed for better thermals. This has been rectifed in the EVM and will be available with the final version release.

UCG28826EVM-093 VIN = 90VAC, Bottom SideFigure 3-56 VIN = 90VAC, Bottom Side.

The hottest component on EVM at this test condition is the bridge rectifier diodes. The polygon connecting to bridge rectifier needs to be exposed for better thermals. This has been rectifed in the EVM and will be available with the final version release.

UCG28826EVM-093 VIN = 115VAC, Bottom SideFigure 3-58 VIN = 115VAC, Bottom Side
UCG28826EVM-093 VIN = 230VAC, Bottom SideFigure 3-60 VIN = 230VAC, Bottom Side

The UCG28826 temperature is close to 83ºC

UCG28826EVM-093 VIN = 265VAC, Bottom SideFigure 3-62 VIN = 265VAC, Bottom Side.

The UCG28826 temperature is close to 83ºC