SLUUBZ3C May   2020  – October 2022 LMG2610 , UCC28782

 

  1. 1 Using the UCC28782EVM-030 65-W USB-C PD High-Density Active-Clamp Flyback Converter
    1.     Trademarks
  2. 2 General Texas Instruments High Voltage Evaluation (TI HV EVM) User Safety Guidelines
  3. 3 Description
  4. 4 Electrical Performance Specifications
  5. 5 Schematic Diagram
  6. 6 Description
    1. 6.1 Typical Application
    2. 6.2 Using the EVM on a Load with USB-C PD Communication
    3. 6.3 Using the EVM on a Load without USB-C PD Communication
  7. 7 Test Setup
    1. 7.1 Test Setup Requirements
    2. 7.2 Test Setup Diagram
    3. 7.3 Test Points
  8. 8 Performance Data and Typical Characteristic Curves
    1. 8.1  Efficiency Result of 4-Point Average on 20-Vout
    2. 8.2  Efficiency Result of 4-Point Average at 15-Vout
    3. 8.3  Efficiency Result of 4-Point Average at 9-Vout
    4. 8.4  Efficiency Result of 4-Point Average at 5-Vout
    5. 8.5  Efficiency Typical Results
    6. 8.6  Output Characteristics
    7. 8.7  Switching Frequency
    8. 8.8  Key Switching Waveforms and Operation Mode Load Current
    9. 8.9  Start Up
    10. 8.10 Output Voltage Adjustment by USB-C PD
    11. 8.11 Line Transient Response
    12. 8.12 Output Ripple Voltage
    13. 8.13 Boost Function for VDD Bias
    14.     29
    15. 8.14 X-Capacitor Discharge
    16. 8.15 USB-C PD Over Current Limit
    17. 8.16 Load Transient Response
    18. 8.17 EN55022 Class B Conducted EMI Test Result
    19. 8.18 Thermal Images at Full Load (20V and 3.25 A)
  9. 9 Transformer Details
  10. 10EVM Assembly and Layout
  11. 11List of Materials
  12. 12Revision History

7.1 Test Setup Requirements

Safety: This evaluation module is not encapsulated and there are accessible voltages that are greater than 50 VDC.

Isolation Input Transformer: A suitably rated 1:1 isolation transformer shall be used on the input(s) to this EVM and be constructed in a manner in which the primary winding(s) are separated from the secondary winding(s) by reinforced insulation, double insulation, or a screen connected to the protective conductor terminal.

GUID-D7DB4A48-9089-4B9C-ACE0-161F20F19E76-low.png
WARNING:

  • If you are not trained in the proper safety of handling and testing power electronics please do not test this evaluation module.
  • While the EVM is energized, never touch the EVM or its electrical circuits, as they could be at high voltages capable of causing electrical shock hazard.
  • Caution Hot surface. Contact may cause burns. Do not touch!
  • Read this user's guide thoroughly before making test.

Voltage Source: Isolated AC source or variable AC transformer capable of 264 VRMS and capable of handling 100 W power level. Warning: Do not apply DC voltage to this board when making test, or damage may happen. If DC voltage source has to be used, the XCD pins need to be grounded by adding R3 = 0 Ω and removing Q3.

Voltmeter: Digital voltage meter

Power Analyzer: Capable of measuring 1 mW to 100 W of input power and capable of handling 264-VRMS input voltage. Some power analyzers may require a precision shunt resistor for measuring input current to measure input power of 5 W or less. Please read the power analyzer’s user manual for proper measurement setups for full power and for stand-by power.

Oscilloscope:

  • 4-Channel, 500 MHz bandwidth.
  • Probes capable of handling 600 V.

Output Load: Resistive or electronic load capable of handling 100 W at 20 V.

Recommended Wire Gauge: Insulated 22 AWG to 18 AWG.

GUID-A4AF7C00-F238-417A-A591-8DF2987B5B43-low.png
WARNING:

Caution: Do not leave EVM powered when unattended.

!! Do not apply DC voltage source to this board or damage may happen !! (See above setup of Voltage Source)