ZHCSQ75C June   2022  – March 2023 UCC28C50-Q1 , UCC28C51-Q1 , UCC28C52-Q1 , UCC28C53-Q1 , UCC28C54-Q1 , UCC28C55-Q1 , UCC28C56H-Q1 , UCC28C56L-Q1 , UCC28C57H-Q1 , UCC28C57L-Q1 , UCC28C58-Q1 , UCC28C59-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  Primary-to-Secondary Turns Ratio of the Flyback Transformer (NPS)
        2. 9.2.2.2  Primary Magnetizing Inductance of the Flyback Transformer (LM)
        3. 9.2.2.3  Number of Turns of the Flyback Transformer Windings
        4. 9.2.2.4  Current Sense Resistors (R24, R25) and Current Limiting
        5. 9.2.2.5  Primary Clamp Circuit (D7, D1, D3, R2, R28) to Limit Voltage Stress
        6. 9.2.2.6  Primary-Side Current Stress and Input Capacitor Selection
        7. 9.2.2.7  Secondary-Side Current Stress and Output Capacitor Selection
        8. 9.2.2.8  VDD Capacitors (C12, C18)
        9. 9.2.2.9  Gate Drive Network (R14, R16, Q6)
        10. 9.2.2.10 VREF Capacitor (C18)
        11. 9.2.2.11 RT/CT Components (R12, C15)
        12. 9.2.2.12 HV Start-Up Circuitry for VDD (Q1, Q2, D2, D4, D6, D8, R5)
        13. 9.2.2.13 Desensitization to CS-pin Noise by RC Filtering, Leading-Edge Blanking, and Slope Compensation
        14. 9.2.2.14 Voltage Feedback Compensation
          1. 9.2.2.14.1 Power Stage Gain, Poles, and Zeroes
          2. 9.2.2.14.2 Compensation Components
          3. 9.2.2.14.3 Bode Plots and Stability Margins
          4. 9.2.2.14.4 Stability Measurements
      3. 9.2.3 Application Curves
    3. 9.3 PCB Layout Recommendations
      1. 9.3.1 PCB Layout Routing Examples
    4. 9.4 Power Supply Recommendations
  10. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Development Support
    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 静电放电警告
    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-7F66B2E8-321D-4EE3-A511-1FA2CACF9119-low.gifFigure 7-1 Oscillator Frequency vs Timing Resistance and Capacitance
GUID-085CBE7B-C7AF-4D49-98CF-54EDF3C5563A-low.gif
Figure 7-3 Error Amplifier Frequency Response
GUID-20221028-SS0I-5VGZ-MTKN-DT82STCTHGZC-low.svg
Group 1: UCC28C50-Q1 to UCC28C55-Q1Group 2: UCC28C56H-Q1 to UCC28C59-Q1
Figure 7-5 Reference Voltage vs Temperature
GUID-20220513-SS0I-ZK9S-VLPW-VPVWM4BCFXZQ-low.svg
Group 1: UCC28C50-Q1 to UCC28C55-Q1Group 2: UCC28C56H-Q1 to UCC28C59-Q1
Figure 7-7 Reference Short-Circuit Current vs Temperature
GUID-4B6E3F22-D4F9-4015-A3FA-1C4321E47796-low.gif
UCC28C52-Q1 and UCC28C54-Q1
Figure 7-9 Undervoltage Lockout vs Temperature
GUID-4314F1CB-FDC7-4C58-AC0F-EB95ABEF45CE-low.gif
UCC28C50-Q1 and UCC28C51-Q1
Figure 7-11 Undervoltage Lockout vs Temperature
GUID-20220401-SS0I-ZWVH-2FQR-HBQJ5QTQSK2X-low.svg
UCC28C56L-Q1 and UCC28C57L-Q1
Figure 7-13 Undervoltage Lockout vs Temperature
GUID-20221101-SS0I-WKFT-RVPZ-DCV6PNCZX4VC-low.svgFigure 7-15 Supply Current vs Oscillator Frequency
GUID-9DE6F354-07A5-434A-9D30-61A6ACAD8EF8-low.gifFigure 7-17 Output Rise Time and Fall Time vs Temperature
GUID-C6FF4B06-3FA6-427C-873F-43C057A572DB-low.gif
UCC28C50-Q1, UCC28C52-Q1, UCC28C53-Q1,

UCC28C56H/L-Q1, and UCC28C58-Q1

Figure 7-19 Maximum Duty Cycle vs Temperature
GUID-20220513-SS0I-2DVP-ZJV7-1NXSQ0TDRHXZ-low.svg
Group 1: UCC28C50-Q1 to UCC28C55-Q1Group 2: UCC28C56H-Q1 to UCC28C59-Q1
Figure 7-21 Current Sense Threshold Voltage vs Temperature
GUID-20221028-SS0I-MHMC-RGHN-BVST27PH9VSP-low.svg
Group 1: UCC28C50-Q1 to UCC28C55-Q1Group 2: UCC28C56H-Q1 to UCC28C59-Q1
Figure 7-2 Oscillator Discharge Current vs Temperature
GUID-20220513-SS0I-XNDM-1TF5-6HZ0BTWN2N9R-low.svg
VCS = 0Group 1: UCC28C50-Q1 to UCC28C55-Q1Group 2: UCC28C56H-Q1 to UCC28C59-Q1
Figure 7-4 COMP to CS Offset Voltage vs Temperature
GUID-20221028-SS0I-J6FC-QF7T-L8SXQM0JHWWV-low.svg
Group 1: UCC28C50-Q1 to UCC28C55-Q1Group 2: UCC28C56H-Q1 to UCC28C59-Q1
Figure 7-6 Error Amplifier Reference Voltage vs Temperature
GUID-6E1AE9A9-3E2F-4B73-89B4-E7010867675C-low.gifFigure 7-8 Error Amplifier Input Bias Current vs Temperature
GUID-5B652379-CBA4-47B1-93FD-E7484A35BF9A-low.gif
UCC28C53-Q1 and UCC28C55-Q1
Figure 7-10 Undervoltage Lockout vs Temperature
GUID-20220401-SS0I-S64C-KKCQ-PBX18PHV7F3W-low.svg
UCC28C56H-Q1 and UCC28C57H-Q1
Figure 7-12 Undervoltage Lockout vs Temperature
GUID-20220401-SS0I-P6DM-63QN-TR9BTQV3JDRK-low.svg
UCC28C58-Q1 and UCC28C59-Q1
Figure 7-14 Undervoltage Lockout vs Temperature
GUID-9B997949-B19E-4D4E-8DB4-AA81F05E8A56-low.svg
Group 1: UCC28C50-Q1 to UCC28C55-Q1Group 2: UCC28C56H-Q1 to UCC28C59-Q1
Figure 7-16 Supply Current vs Temperature
GUID-CF39C555-9DF9-4071-B99A-1F964D876E54-low.gifFigure 7-18 Maximum Duty Cycle vs Oscillator Frequency
GUID-3B9401BD-2480-477D-B19C-D1EA0F5A2447-low.gif
UCC28C51-Q1, UCC28C54-Q1, UCC28C55-Q1,

UCC28C57H/L-Q1, and UCC28C59-Q1

Figure 7-20 Maximum Duty Cycle vs Temperature
GUID-74156948-0C9C-480E-A662-F2EC9153DF3D-low.gifFigure 7-22 Current Sense to Output Delay Time vs Temperature