ZHCSJY8E june   2019  – february 2021 UCC256402 , UCC256403 , UCC256404

PRODUCTION DATA  

1. 1 特性
2. 2 应用
3. 3 说明
4. 4 Revision History
   1.     Device Comparison Table
5. 5 Pin Configuration and Functions
   1.     Pin Functions
6. 6 Specifications
   1. 6.1 Absolute Maximum Ratings
   2. 6.2 ESD Ratings
   3. 6.3 Recommended Operating Conditions
   4. 6.4 Thermal Information
   5. 6.5 Electrical Characteristics
   6. 6.6 Switching Characteristics
   7. 6.7 Typical Characteristics
7. 7 Detailed Description
   1. 7.1 Overview
   2. 7.2 Functional Block Diagram
   3. 7.3 Feature Description
      1. 7.3.1 Hybrid Hysteretic Control
      2. 7.3.2 Regulated 13-V Supply
      3. 7.3.3 Feedback Chain
         1. 7.3.3.1 Optocoupler Feedback Signal Input and Bias
         2. 7.3.3.2 FB Pin Voltage Clamp
         3. 7.3.3.3 "Pick Lower Value" Block and Soft Start Multiplexer
         4. 7.3.3.4 Pick Higher Block and Burst Mode Multiplexer
         5. 7.3.3.5 VCR Comparators
      4. 7.3.4 Resonant Capacitor Voltage Sensing
      5. 7.3.5 Resonant Current Sensing
      6. 7.3.6 Bulk Voltage Sensing
      7. 7.3.7 Output Voltage Sensing
      8. 7.3.8 High Voltage Gate Driver
         1. 7.3.8.1 Adaptive Dead Time Control
      9. 7.3.9 Protections
         1. 7.3.9.1 ZCS Region Prevention
         2. 7.3.9.2 Over Current Protection (OCP)
         3. 7.3.9.3 Bias Winding Over Voltage Protection (BWOVP)
         4. 7.3.9.4 Input Under Voltage Protection (VINUVP)
         5. 7.3.9.5 Input Over Voltage Protection (VINOVP)
         6. 7.3.9.6 Boot UVLO
         7. 7.3.9.7 RVCC UVLO
         8. 7.3.9.8 Over Temperature Protection (OTP)
   4. 7.4 Device Functional Modes
      1. 7.4.1 High Voltage Start-Up
      2. 7.4.2 X-Capacitor Discharge
      3. 7.4.3 Burst Mode Control
         1. 7.4.3.1 Soft-Start and Burst-Mode Threshold
         2. 7.4.3.2 BMTL/BMTH Ratio Programming
      4. 7.4.4 System State Machine
         1.       Application and Implementation
            1. 8.1 Application Information
            2. 8.2 Typical Application
               1. 8.2.1 Design Requirements
               2. 8.2.2 Detailed Design Procedure
                  1. 8.2.2.1  LLC Power Stage Requirements
                  2. 8.2.2.2  LLC Gain Range
                  3. 8.2.2.3  Select Ln and Qe
                  4. 8.2.2.4  Determine Equivalent Load Resistance
                  5. 8.2.2.5  Determine Component Parameters for LLC Resonant Circuit
                  6. 8.2.2.6  LLC Primary-Side Currents
                  7. 8.2.2.7  LLC Secondary-Side Currents
                  8. 8.2.2.8  LLC Transformer
                  9. 8.2.2.9  LLC Resonant Inductor
                  10. 8.2.2.10 LLC Resonant Capacitor
                  11. 8.2.2.11 LLC Primary-Side MOSFETs
                  12. 8.2.2.12 LLC Rectifier Diodes
                  13. 8.2.2.13 LLC Output Capacitors
                  14. 8.2.2.14 HV Pin Series Resistors
                  15. 8.2.2.15 BLK Pin Voltage Divider
                  16. 8.2.2.16 ISNS Pin Differentiator
                  17. 8.2.2.17 VCR Pin Capacitor Divider
                  18. 8.2.2.18 BW Pin Voltage Divider
                  19. 8.2.2.19 Soft Start and Burst Mode Programming
               3. 8.2.3 Application Curves
8. 8 Power Supply Recommendations
   1. 8.1 VCC Pin Capacitor
   2. 8.2 Boot Capacitor
   3. 8.3 RVCC Pin Capacitor
9. 9 Layout
   1. 9.1 Layout Guidelines
   2. 9.2 Layout Example
10. 10Device and Documentation Support
    1. 10.1 Documentation Support
       1. 10.1.1 Related Documentation
    2. 10.2 Related Links
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Community Resources
    5. 10.5 Trademarks
       1.      Mechanical, Packaging, and Orderable Information