SLUU885C March   2012  – June 2024 UCD3138 , UCD3138064 , UCD3138064A , UCD3138128 , UCD3138A , UCD3138A64

 

  1.   1
  2.   2
  3.   Abstract
  4. 1 Introduction
  5. 2 Description
    1. 2.1 Typical Applications
    2. 2.2 Features
  6. 3 Electrical Performance Specifications
  7. 4 Schematics
  8. 5 Test Setup
    1. 5.1 Test Equipment
    2. 5.2 Recommended Test Setup
  9. 6 List of Test Points
  10. 7 List of Terminals
  11. 8 Test Procedure
    1. 8.1 Efficiency Measurement Procedure
    2. 8.2 Equipment Shutdown
  12. 9 Performance Data and Typical Characteristic Curves
    1. 9.1 Efficiency
    2. 9.2 Power Factor
    3. 9.3 Total Harmonic Distortion (THD)
    4. 9.4 Input Current at 230 VAC and 50 Hz
    5. 9.5 Output Voltage Ripple
    6. 9.6 Output Turn On
    7. 9.7 Total Harmonic Distortion (THD)
    8. 9.8 Other Waveforms
  13. 10EVM Assembly Drawing and PCB Layout
  14. 11List of Materials
  15. 12Digital PFC Description
    1. 12.1  1PFC Block Diagram
      1. 12.1.1 Single-Phase PFC Block Diagram
      2. 12.1.2 2-Phase PFC Block Diagram
      3. 12.1.3 Bridgeless PFC Block Diagram
    2. 12.2  UCD3138 Pin Definition
      1. 12.2.1 UCD3138 Pin Definition in Single-Phase PFC
      2. 12.2.2 UCD3138 Pin Definition in 2-Phase PFC
      3. 12.2.3 UCD3138 Pin Definition in Bridgeless PFC
    3. 12.3  EVM Hardware – Introduction
      1. 12.3.1 PFC Pre-Regulator Input
      2. 12.3.2 PFC Power Stage
      3. 12.3.3 Non-Isolated UART Interface
      4. 12.3.4 Isolated UART Interface
      5. 12.3.5 Interface Connector of Control Card
      6. 12.3.6 UCD3138 Resource Allocation for PFC Control
    4. 12.4  EVM Firmware – Introduction
      1. 12.4.1 Background Loop
      2. 12.4.2 Voltage Loop Configuration
      3. 12.4.3 Current Loop Configuration
      4. 12.4.4 Interrupts
    5. 12.5  State Machine
    6. 12.6  PFC Control Firmware
    7. 12.7  System Protection
      1. 12.7.1 Cycle-by-Cycle Current Protection (CBC)
      2. 12.7.2 Over-Voltage Protection (OVP)
    8. 12.8  PFC System Control
      1. 12.8.1 Average Current Mode Control
      2. 12.8.2 ZVS and Valley Control
    9. 12.9  Current Feedback Control Compensation Using PID Control
      1. 12.9.1 Loop Compensation from Poles and Zeros in s-Domain
      2. 12.9.2 Feedback Loop Compenstaion Tuning with PID Coefficients
      3. 12.9.3 Feedback Loop Compensation with Multiple-Set of Parameters
    10. 12.10 Voltage Feedback Loop
  16. 13Evaluating the Single-Phase PFC with GUI
    1. 13.1 Graphical User Interface (GUI)
    2. 13.2 Open the Designer GUI
    3. 13.3 Overview of the Designer GUI
      1. 13.3.1 Monitor
      2. 13.3.2 Status
      3. 13.3.3 Design and Configure
  17. 14Monitoring, Re-configuring and Re-tuning with Designer GUI
    1. 14.1 Power On and Test Procedure
    2. 14.2 Monitoring with GUI
    3. 14.3 Configuration and Re-configuring with GUI
    4. 14.4 Feedback Control Loop Tuning and Re-Tuning with GUI
      1. 14.4.1 Current Loop Evaluation
      2. 14.4.2 Current Loop Re-Tuning
      3. 14.4.3 Voltage Loop Evaluation and Re-tuning
  18. 15Digital PFC Firmware Development
  19. 16References
  20. 17Revision History

1 Introduction

This EVM is a standalone single-phase boost PFC (power factor correction) pre-regulator implemented using the UCD3138 digital power controller from TI. The EVM UCD3138PFCEVM-026 is comprised of a boost PFC power stage board and a control card (UCD3138CC64EVM-030, also available as a separate EVM from TI) on which resides the UCD3138 controller that is programmed with the digital PFC firmware.

The UCD3138PFCEVM-026 EVM can be evaluated in the stand-alone mode and requires no intervention from a PC. However, TI also offers a GUI called Texas Instruments Fusion Digital Power Studio, which can be used to re-configure various electrical design parameters of the EVM and download the UCD3138 with custom firmware developed by the user that is appropriate to and compatible with the hardware design.

The default configuration of this EVM is Single-phase Boost PFC. But, it can be easily re-configured with simple hardware and firmware modifications into a 2-phase Interleaved PFC or Bridgeless PFC. Reference Evaluating UCD3138 in Interleave PFC or Bridgeless PFC Configurations using UCD3138PFCEVM-026 for re-configuration instructions.

Three EVMs are included in the delivered box: a UCD3138PFCEVM-026 power stage, a UCD3138CC64EVM-030 control card, and a USB-TO-GPIO adapter. A hard copy of Evaluation Module Electrical Safety Guideline is also included in the box.

This user's guide provides instructions on how to operate the EVM's single-phase boost PFC configuration. This user's guide also provides basic GUI operation instructions, including how to use the GUI to tune PID coefficients digitally. Lastly, a high-level description of the UCD3138 single-phase PFC configuration, firmware and control algorithm is provided.

WARNING:
  • High voltages are present on this evaluation module during operation and for a while even after power off. This module should only be tested by skilled personnel in a controlled laboratory environment.
  • An isolated AC voltage source meeting IEC61010 reinforced insulation standards is recommended for evaluating this EVM.
  • High temperature exceeding 60°C may be found during EVM operation and for a while even after power off.
  • This EVM’s purpose is to facilitate the evaluation of digital control in a PFC using the UCD3138, and cannot be tested and treated as a final product.
  • Extreme caution should be taken to eliminate the possibility of electric shock and heat burn.
  • Read and understand this user’s guide thoroughly before starting any physical evaluation.