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

1.4 Device Information

The UCC25661x is a fully featured LLC controller with integrated high-voltage gate driver. The UCC25661x has been designed to cover a wide range of applications with specific features added to make the device easy to design for wide input and output voltage operation needs. The device can be paired with a PFC controller to provide a complete power system using a minimum of external components. The resulting power system is designed to meet the most stringent requirements for standby power without the need for a separate standby power converter.

UCC25661x implements a new control algorithm which provides a highly efficient and consistent low power and burst mode. Both the low power and burst mode operation are designed to minimize audible noise while meeting DoE level VI, EuP regulations. The burst power level and hysteresis are programmable and directly relate to input power, simplifying the design and enabling wide input and output voltage operation.

The UCC25661x provides several protection features ranging from cycle-by-cycle protection, capacitive region operation avoidance, external OVP and OTP to enhance the reliability of the LLC power stage.