SLUSAW0C March   2012  – July 2025 UCC28070 , UCC28070A

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Interleaving
      2. 6.3.2  Programming the PWM Frequency and Maximum Duty-Cycle Clamp
      3. 6.3.3  Frequency Dithering (Magnitude and Rate)
      4. 6.3.4  External Clock Synchronization
      5. 6.3.5  Multi-phase Operation
      6. 6.3.6  VSENSE and VINAC Resistor Configuration
      7. 6.3.7  VSENSE and VINAC Open-Circuit Protection
      8. 6.3.8  Current Synthesizer
      9. 6.3.9  Programmable Peak Current Limit
      10. 6.3.10 Linear Multiplier and Quantized Voltage Feed Forward
      11. 6.3.11 Enhanced Transient Response (VA Slew-Rate Correction)
      12. 6.3.12 Bias Voltages (VCC and VREF)
      13. 6.3.13 PFC Enable and Disable
      14. 6.3.14 Adaptive Soft-Start
      15. 6.3.15 PFC Start-Up Hold Off
      16. 6.3.16 Output Overvoltage Protection (OVP)
      17. 6.3.17 Zero-Power Detection
      18. 6.3.18 Thermal Shutdown
      19. 6.3.19 Current Loop Compensation
      20. 6.3.20 Voltage Loop Compensation
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Output Current Calculation
        2. 7.2.2.2 Bridge Rectifier
        3. 7.2.2.3 PFC Inductor (L1 and L2)
        4. 7.2.2.4 PFC MOSFETs (M1 and M2)
        5. 7.2.2.5 PFC Diode
        6. 7.2.2.6 PFC Output Capacitor
        7. 7.2.2.7 Current-Loop Feedback Configuration (Sizing of the Current-Transformer Turns-Ratio NCT and Current-Sense Resistor RS)
        8. 7.2.2.8 Current-Sense Offset and PWM Ramp for Improved Noise Immunity
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5.6 Typical Characteristics

UCC28070 UCC28070A VCC Supply Current vs Junction TemperatureFigure 5-1 VCC Supply Current vs Junction Temperature
UCC28070 UCC28070A VVSENSE Regulation vs Junction TemperatureFigure 5-3 VVSENSE Regulation vs Junction Temperature
UCC28070 UCC28070A IMO, Multiplier Output Current vs VVAOFigure 5-5 IMO, Multiplier Output Current vs VVAO
UCC28070 UCC28070A IVINAC Bias Current vs Junction TemperatureFigure 5-7 IVINAC Bias Current vs Junction Temperature
UCC28070 UCC28070A VAO, Voltage Amplifier Transconductance vs Junction TemperatureFigure 5-9 VAO, Voltage Amplifier Transconductance vs Junction Temperature
UCC28070 UCC28070A Current Amplifier Transconductance vs Junction TemperatureFigure 5-11 Current Amplifier Transconductance vs Junction Temperature
UCC28070 UCC28070A VVREF vs Junction Temperature
IVREF = 0mA
Figure 5-2 VVREF vs Junction Temperature
UCC28070 UCC28070A IVSENSE Bias Current vs Junction TemperatureFigure 5-4 IVSENSE Bias Current vs Junction Temperature
UCC28070 UCC28070A Multiplier Constant vs Junction TemperatureFigure 5-6 Multiplier Constant vs Junction Temperature
UCC28070 UCC28070A Switching Frequency vs TemperatureFigure 5-8 Switching Frequency vs Temperature
UCC28070 UCC28070A Voltage Amplifier Transfer Function vs VVSENSEFigure 5-10 Voltage Amplifier Transfer Function vs VVSENSE
UCC28070 UCC28070A CAx Input Offset Voltage vs Junction Temperature
0.8V Common Mode
Figure 5-12 CAx Input Offset Voltage vs Junction Temperature
UCC28070 UCC28070A CAx Input Offset Voltage vs Junction Temperature
2V Common Mode
Figure 5-14 CAx Input Offset Voltage vs Junction Temperature
UCC28070 UCC28070A CAx Input Offset Voltage vs Junction Temperature
3.6V Common Mode
Figure 5-16 CAx Input Offset Voltage vs Junction Temperature
UCC28070 UCC28070A CA1 to CA2 Relative Offset vs Junction Temperature
0.8V Common Mode
Figure 5-13 CA1 to CA2 Relative Offset vs Junction Temperature
UCC28070 UCC28070A CA1 to CA2 Relative Offset vs Junction Temperature
2V Common Mode
Figure 5-15 CA1 to CA2 Relative Offset vs Junction Temperature
UCC28070 UCC28070A CA1 to CA2 Relative Offset vs Junction Temperature
3.6V Common Mode
Figure 5-17 CA1 to CA2 Relative Offset vs Junction Temperature