SLUSD37E October   2017  – November 2019 UCC28056

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     No Load Power
      1.      Device Images
        1.       Simplified Application
  4. 4 Revision History
  5. 5 Device Comparison Tables
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 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. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 CrM/DCM Control Principle
      2. 8.3.2 Line Voltage Feed-Forward
        1. 8.3.2.1 Peak Line Voltage Detection
      3. 8.3.3 Valley Switching and CrM/DCM Hysteresis
        1. 8.3.3.1 Valley Delay Adjustment
      4. 8.3.4 Transconductance Amplifier with Transient Speed-up Function
      5. 8.3.5 Faults and Protections
        1. 8.3.5.1 Supply Undervoltage Lockout
        2. 8.3.5.2 Two Level Over-Current Protection
          1. 8.3.5.2.1 Cycle-by-Cycle Current Limit Ocp1
          2. 8.3.5.2.2 Ocp2 Gross Over-Current or CCM Protection
        3. 8.3.5.3 Output Over-Voltage Protection
          1. 8.3.5.3.1 First Level Output Over-Voltage Protection (Ovp1)
          2. 8.3.5.3.2 Second Level Over-Voltage Protection (Ovp2)
        4. 8.3.5.4 Thermal Shutdown Protection
        5. 8.3.5.5 Line Under-Voltage or Brown-In
      6. 8.3.6 High-Current Driver
    4. 8.4 Controller Functional Modes
      1. 8.4.1 Burst Mode Operation
      2. 8.4.2 Soft Start
  9. 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 Power Stage Design
          1. 9.2.2.2.1 Boost Inductor Design
          2. 9.2.2.2.2 Boost Switch Selection
          3. 9.2.2.2.3 Boost Diode Selection
          4. 9.2.2.2.4 Output Capacitor Selection
        3. 9.2.2.3 ZCD/CS Pin
          1. 9.2.2.3.1 Voltage Spikes on the ZCD/CS pin Waveform
        4. 9.2.2.4 VOSNS Pin
        5. 9.2.2.5 Voltage Loop Compensation
          1. 9.2.2.5.1 Plant Model
          2. 9.2.2.5.2 Compensator Design
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 VOSNS Pin
      2. 11.1.2 ZCD/CS Pin
      3. 11.1.3 VCC Pin
      4. 11.1.4 GND Pin
      5. 11.1.5 DRV Pin
      6. 11.1.6 COMP Pin
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Custom Design With WEBENCH® Tools
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

7.6 Typical Characteristics

UCC28056 d0001slusd37.gif
Figure 1. VCCStart Threshold vs Temperature
UCC28056 d0003slusd37.gif
Figure 3. VCC Hysteresis vs Temperature
UCC28056 d0005slusd37.gif
Figure 5. VCC Fault Current vs Temperature
UCC28056 d0007slusd37.gif
Figure 7. VCC Curent Run Mode vs Temperature
UCC28056 d0009slusd37.gif
Figure 9. gM vs Temperature
UCC28056 d0011slusd37.gif
Figure 11. VOVP2 Threshold vs Temperature
UCC28056 D007_SLUSD37.gif
It is Normalized respect its value at 25°C
Figure 13. Burst Mode Rising Threshold vs Temperature
UCC28056 D008_SLUSD37.gif
It is Normalized respect its value at 25°C
Figure 15. VOSNS OVP1 Rising Threshold vs Temperature
UCC28056 d0017slusd37.gif
Figure 17. TON Max vs Temperature
UCC28056 d0002slusd37.gif
Figure 2. VCCStop Threshold vs Temperature
UCC28056 d0004slusd37.gif
Figure 4. VCC Startup Current vs Temperature
UCC28056 d0006slusd37.gif
Figure 6. VCC Burst Off Current vs Temperature
UCC28056 d0008slusd37.gif
Figure 8. VOSNSReg vs Temperature
UCC28056 d0010slusd37.gif
Figure 10. VBoRise vs Temperature
UCC28056 D006_SLUSD37.gif
It is Normalized respect its value at 25°C
Figure 12. Burst Mode Falling Threshold vs Temperature
UCC28056 d0014slusd37.gif
Figure 14. ZCD Timeout vs Temperature
UCC28056 D009_SLUSD37.gif
It is Normalized respect its value at 25°C
Figure 16. VOSNS OVP1 Falling Threshold vs Temperature
UCC28056 d0018slusd37.gif
Figure 18. TDCM vs COMP Voltage