ZHCSK44G December   2009  – November 2022 UCC28C40-Q1 , UCC28C41-Q1 , UCC28C42-Q1 , UCC28C43-Q1 , UCC28C44-Q1 , UCC28C45-Q1

PRODUCTION DATA  

  1. 特性
  2. 应用
  3. 说明
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Detailed Pin Description
        1. 8.3.1.1 COMP
        2. 8.3.1.2 FB
        3. 8.3.1.3 CS
        4. 8.3.1.4 RT/CT
        5. 8.3.1.5 GND
        6. 8.3.1.6 OUT
        7. 8.3.1.7 VDD
        8. 8.3.1.8 VREF
      2. 8.3.2  Undervoltage Lockout
      3. 8.3.3  ±1% Internal Reference Voltage
      4. 8.3.4  Current Sense and Overcurrent Limit
      5. 8.3.5  Reduced-Discharge Current Variation
      6. 8.3.6  Oscillator Synchronization
      7. 8.3.7  Soft Start
      8. 8.3.8  Enable and Disable
      9. 8.3.9  Slope Compensation
      10. 8.3.10 Voltage Mode
    4. 8.4 Device Functional Modes
      1. 8.4.1 Normal Operation
      2. 8.4.2 UVLO Mode
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1  Custom Design With WEBENCH® Tools
        2. 9.2.2.2  Input Bulk Capacitor and Minimum Bulk Voltage
        3. 9.2.2.3  Transformer Turns Ratio and Maximum Duty CycleG
        4. 9.2.2.4  Transformer Inductance and Peak Currents
        5. 9.2.2.5  Output Capacitor
        6. 9.2.2.6  Current Sensing Network
        7. 9.2.2.7  Gate Drive Resistor
        8. 9.2.2.8  VREF Capacitor
        9. 9.2.2.9  RT/CT
        10. 9.2.2.10 Start-Up Circuit
        11. 9.2.2.11 Voltage Feedback Compensation
          1. 9.2.2.11.1 Power Stage Poles and Zeroes
          2. 9.2.2.11.2 Slope Compensation
          3. 9.2.2.11.3 Open-Loop Gain
          4. 9.2.2.11.4 Compensation Loop
      3. 9.2.3 Application Curves
      4. 9.2.4 Power Supply Recommendations
      5. 9.2.5 Layout
        1. 9.2.5.1 Layout Guidelines
          1. 9.2.5.1.1 Precautions
          2. 9.2.5.1.2 Feedback Traces
          3. 9.2.5.1.3 Bypass Capacitors
          4. 9.2.5.1.4 Compensation Components
          5. 9.2.5.1.5 Traces and Ground Planes
        2. 9.2.5.2 Layout Example
  10. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
        1. 10.1.1.1 Custom Design With WEBENCH® Tools
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Related Links
    4. 10.4 支持资源
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 术语表
  11. 11Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

Typical Characteristics

GUID-AFB31408-E964-4116-8840-2B8AB24DFA9B-low.gifFigure 7-1 Oscillator Frequency vs Timing Resistance and Capacitance
GUID-A2CE145F-A109-482F-9B90-81146F3EBFC6-low.gifFigure 7-3 Error Amplifier Frequency Response
GUID-52842CBA-A095-4258-BE27-3A2BEA56BDD5-low.gifFigure 7-5 Reference Voltage vs Temperature
GUID-596AABFE-81C0-41EA-9495-B9B453848A46-low.gifFigure 7-7 Reference Short-Circuit Current vs Temperature
GUID-83852F03-0E19-4F6C-9E5C-6B41F000074E-low.gif
UCC28C42-Q1 and UCC28C44-Q1
Figure 7-9 Undervoltage Lockout vs Temperature
GUID-FF334633-7DF5-41B1-9274-83A1F694FBCA-low.gif
UCC28C40-Q1 and UCC28C41-Q1
Figure 7-11 Undervoltage Lockout vs Temperature
GUID-30CBA2BB-7123-4384-A2BE-B8F32D68F861-low.gifFigure 7-13 Supply Current vs Temperature
GUID-06B9D1A7-2754-453F-B726-CA2E582CA081-low.gifFigure 7-15 Maximum Duty Cycle vs Oscillator Frequency
GUID-20220919-SS0I-Z1DM-LCNJ-1KKVSJTGHFDC-low.gifFigure 7-17 Maximum Duty Cycle vs Temperature
GUID-F5468E97-3074-49FF-AB75-99232AE57617-low.gifFigure 7-19 Current Sense to Output Delay Time vs Temperature
GUID-C443E76A-13D9-45D0-974A-17119B9A7E57-low.gifFigure 7-2 Oscillator Discharge Current vs Temperature
GUID-BB061591-BCE0-40C4-9DCD-9C6AFCF9427E-low.gif
VCS = 0 V
Figure 7-4 COMP to CS Offset Voltage vs Temperature
GUID-74EE6B0C-091B-46AC-B904-925A15D17A5C-low.gifFigure 7-6 Error Amplifier Reference Voltage vs Temperature
GUID-D36BAA44-EDED-4EB6-A13B-B49AD3360F17-low.gifFigure 7-8 Error Amplifier Input Bias Current vs Temperature
GUID-8419EA48-354D-44EA-9E49-B6256363A055-low.gif
UCC28C43-Q1 and UCC28C45-Q1
Figure 7-10 Undervoltage Lockout vs Temperature
GUID-9F2BDE32-C758-40D1-91CD-24C35D52A771-low.gifFigure 7-12 Supply Current vs Oscillator Frequency
GUID-926B8A6F-3DBA-419D-9870-09C1AE315F16-low.gifFigure 7-14 Output Rise Time and Fall Time vs Temperature
GUID-94F49A17-69AE-4587-8065-4FE6F54C89A5-low.pngFigure 7-16 Maximum Duty Cycle vs Temperature
GUID-8B3372CE-CB2E-43E7-9901-2CE60AB86DBB-low.gifFigure 7-18 Current Sense Threshold Voltage vs Temperature