SLUUD60B October   2024  – May 2025 UCG28826

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 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
  8. 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
  9. 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 (20V and 3.25A)
  10. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Transformer Details
      1. 4.3.1 RLTI-1464 (RENCO)
    4. 4.4 Bill of Materials
  11. 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
  12. 6Additional Information
    1.     Trademarks
  13. 7Revision History

4.3.1 RLTI-1464 (RENCO)

This transformer is highly optimal and recommended for this design to meet the efficiency specifications. This achievs good balance between leakage energy (thereby enabling efficiency) and interwinding capacitance (helps with the thermal performance of UCG28826).

UCG28826EVM-093 RLTI-1464 pin configurationFigure 4-4 RLTI-1464 pin configuration
UCG28826EVM-093 RLTI-1464 SchematicFigure 4-5 RLTI-1464 Schematic
Table 4-1 Transformer Specifications at 25°C
PARAMETERVALUEPINS/LEADSTEST CONDITIONS
Inductance (µH)200, ± 5%1 – 12Open all other pins, 100kHz / 0.1Vac
Leakage Inductance (µH)3.5 Max.1 – 12Short A - B, 100kHz / 0.1Vac
D.C. resistance (Ω)0.220, ±15%1 – 12
D.C. resistance (Ω)0.007 Max.A – B
Dielectric (VAC, 60Hz)3000Vac1– A1mA, 60Hz, 1s
Turns-ratios

6:1

(1-12):(A-B)APPLY: 1.0V @ 10kHz to (12 - 1)

Vout: (A-B) 0.167V