ZHCSOY9 december   2021 UCC28781

PRODUCTION DATA  

1.   1
2. 1 特性
3. 2 應用
4. 3 說明
5. 4 Revision History
6. 5 Pin Configuration and Functions
7. 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 Typical Characteristics
8. 7 Detailed Description
   1. 7.1 Overview
   2. 7.2 Functional Block Diagram
   3. 7.3 Detailed Pin Description
      1. 7.3.1  BUR Pin (Programmable Burst Mode)
      2. 7.3.2  FB Pin (Feedback Pin)
      3. 7.3.3  REF Pin (Internal 5-V Bias)
      4. 7.3.4  VDD Pin (Device Bias Supply)
      5. 7.3.5  P13 and SWS Pins
      6. 7.3.6  S13 Pin
      7. 7.3.7  IPC Pin (Intelligent Power Control Pin)
      8. 7.3.8  RUN Pin (Driver and Bias Source for Isolator)
      9. 7.3.9  PWMH and AGND Pins
      10. 7.3.10 PWML and PGND Pins
      11. 7.3.11 SET Pin
      12. 7.3.12 RTZ Pin (Sets Delay for Transition Time to Zero)
      13. 7.3.13 RDM Pin (Sets Synthesized Demagnetization Time for ZVS Tuning)
      14. 7.3.14 XCD Pin
      15. 7.3.15 CS, VS, and FLT Pins
   4. 7.4 Device Functional Modes
      1. 7.4.1  Adaptive ZVS Control with Auto-Tuning
      2. 7.4.2  Dead-Time Optimization
      3. 7.4.3  EMI Dither and Dither Fading Function
      4. 7.4.4  Control Law Across Entire Load Range
      5. 7.4.5  Adaptive Amplitude Modulation (AAM)
      6. 7.4.6  Adaptive Burst Mode (ABM)
      7. 7.4.7  Low Power Mode (LPM)
      8. 7.4.8  First Standby Power Mode (SBP1)
      9. 7.4.9  Second Standby Power Mode (SBP2)
      10. 7.4.10 Startup Sequence
      11. 7.4.11 Survival Mode of VDD (INT_STOP)
      12. 7.4.12 System Fault Protections
          1. 7.4.12.1  Brown-In and Brown-Out
          2. 7.4.12.2  Output Over-Voltage Protection (OVP)
          3. 7.4.12.3  輸入過壓保護 (IOVP)
          4. 7.4.12.4  FLT 引腳上的過熱保護 (OTP)
          5. 7.4.12.5  CS 引腳上的過熱保護 (OTP)
          6. 7.4.12.6  可編程過功率保護 (OPP)
          7. 7.4.12.7  峰值功率限制 (PPL)
          8. 7.4.12.8  輸出短路保護 (SCP)
          9. 7.4.12.9  過流保護 (OCP)
          10. 7.4.12.10 External Shutdown
          11. 7.4.12.11 Internal Thermal Shutdown
      13. 7.4.13 Pin Open/Short Protections
          1. 7.4.13.1 Protections on CS pin Fault
          2. 7.4.13.2 Protections on P13 pin Fault
          3. 7.4.13.3 Protections on RDM and RTZ pin Faults
9. 8 Application and Implementation
   1. 8.1 Application Information
   2. 8.2 Typical Application Circuit
      1. 8.2.1 Design Requirements for a 60-W, 15-V ZVSF Bias Supply Application with a DC Input
      2. 8.2.2 Detailed Design Procedure
         1. 8.2.2.1 Input Bulk Capacitance and Minimum Bulk Voltage
         2. 8.2.2.2 Transformer Calculations
            1. 8.2.2.2.1 Primary-to-Secondary Turns Ratio (NPS)
            2. 8.2.2.2.2 Primary Magnetizing Inductance (LM)
            3. 8.2.2.2.3 Primary Winding Turns (NP)
            4. 8.2.2.2.4 Secondary Winding Turns (NS)
            5. 8.2.2.2.5 Auxiliary Winding Turns (NA)
            6. 8.2.2.2.6 Winding and Magnetic Core Materials
         3. 8.2.2.3 Calculation of ZVS Sensing Network
         4. 8.2.2.4 Calculation of BUR Pin Resistances
         5. 8.2.2.5 Calculation of Compensation Network
      3. 8.2.3 Application Curves
10. 9 Power Supply Recommendations
11. 10Layout
    1. 10.1 Layout Guidelines
       1. 10.1.1  General Considerations
       2. 10.1.2  RDM and RTZ Pins
       3. 10.1.3  SWS Pin
       4. 10.1.4  VS Pin
       5. 10.1.5  BUR Pin
       6. 10.1.6  FB Pin
       7. 10.1.7  CS Pin
       8. 10.1.8  AGND Pin
       9. 10.1.9  PGND Pin
       10. 10.1.10 Thermal Pad
    2. 10.2 Layout Example
12. 11Device and Documentation Support
    1. 11.1 Documentation Support
       1. 11.1.1 Receiving Notification of Documentation Updates
    2. 11.2 支持資源
    3. 11.3 Trademarks
    4. 11.4 靜電放電警告
    5. 11.5 術語表
13. 12Mechanical, Packaging, and Orderable Information

UCC28781 具有專用同步整流器柵極驅動的
零電壓開關反激式控制器