SLUUDA3 May   2025

 

  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

Test Points

Table 2-3 lists the EVM test points.

Table 2-1 Test Points
Test PointsDescription
VinInput voltage positive terminal
HGPrimary-side high side MOSFET gate, Q1
VAUX Rectified Auxiliary winding Voltage
SGND1Secondary-side ground
SGND2Secondary-side ground
SWPrimary-side switch node, or the intersection of Q1 and Q3
VCCController Supply input
LGPrimary-side low side MOSFET gate, Q3
TP8Primary-side ground
TP9Primary-side ground
VoutOutput voltage positive terminal
InjSmall signal injection terminal
I_optFeedback current measurement
HVHigh-voltage start pin
HV_diodeHigh-voltage start pin
5VPRegulated 5-V bias
BLKInput voltage sensing
LAC line
NAC neutral
LLLight-load burst mode thresholds
ISNSResonant current sense
OVP_OTPBias winding voltage sense/External over temperature protection
TSETOn time min and max programming/ PFC on/off logic