SNVSA88C December   2014  – November 2016 UCC28063A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (Continued)
  6. 6 Pin Configuration and 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  Principles of Operation
      2. 8.3.2  Natural Interleaving
      3. 8.3.3  On-Time Control, Maximum Frequency Limiting, and Restart Timer
      4. 8.3.4  Distortion Reduction
      5. 8.3.5  Zero-Current Detection and Valley Switching
      6. 8.3.6  Phase Management and Light-Load Operation
      7. 8.3.7  External Disable
      8. 8.3.8  Improved Error Amplifier
      9. 8.3.9  Soft Start
      10. 8.3.10 Brownout Protection
      11. 8.3.11 Dropout Detection
      12. 8.3.12 VREF
      13. 8.3.13 VCC
      14. 8.3.14 Control of Downstream Converter
      15. 8.3.15 System Level Protections
        1. 8.3.15.1 Failsafe OVP - Output Overvoltage Protection
        2. 8.3.15.2 Overcurrent Protection
        3. 8.3.15.3 Open-Loop Protection
        4. 8.3.15.4 VCC Undervoltage Lock-Out (UVLO) Protection
        5. 8.3.15.5 Phase-Fail Protection
        6. 8.3.15.6 Thermal Shutdown Protection
        7. 8.3.15.7 AC-Line Brownout and Dropout Protections
        8. 8.3.15.8 Fault Logic Diagram
    4. 8.4 Device Functional Modes
  9. 9 Applications 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  Inductor Selection
        2. 9.2.2.2  ZCD Resistor Selection (RZA, RZB)
        3. 9.2.2.3  HVSEN
        4. 9.2.2.4  Output Capacitor Selection
        5. 9.2.2.5  Selecting (RS) For Peak Current Limiting
        6. 9.2.2.6  Power Semiconductor Selection (Q1, Q2, D1, D2)
        7. 9.2.2.7  Brownout Protection
        8. 9.2.2.8  Converter Timing
        9. 9.2.2.9  Programming VOUT
        10. 9.2.2.10 Voltage Loop Compensation
      3. 9.2.3 Application Curves
        1. 9.2.3.1 Input Ripple Current Cancellation with Natural Interleaving
        2. 9.2.3.2 Brownout Protection
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
        1. 12.1.1.1 Related Parts
      2. 12.1.2 Device Nomenclature
        1. 12.1.2.1 Detailed Pin Description
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • Input Filter and Output Capacitor Ripple-Current Cancellation
    • Reduced Current Ripple for Higher System Reliability and Smaller Bulk Capacitor
    • Reduced EMI Filter Size
  • Phase Management Capability
  • Fail-Safe OVP with Dual Paths Prevents Output Overvoltage Conditions by Voltage-Sensing Failures
  • Sensorless Current-Shaping Simplifies Board Layout and Improves Efficiency
  • Advanced Audible Noise Performance
  • Non-linear Error-Amplifier Gain
  • Soft Recovery on Overvoltage
  • Integrated Brownout and Dropout Handling
  • Reduced Bias Currents
  • Improved Efficiency and Design Flexibility Over Traditional Single-Phase Continuous Conduction Mode (CCM)
  • Inrush-Safe Current Limiting:
    • Prevents MOSFET Conduction During Inrush
    • Eliminates reverse Recovery Events in Output rectifiers
  • Enables Use of Low-Cost Diodes Without Extensive Snubber Circuitry
  • Improved Light-Load Efficiency
  • Fast, Smooth Transient Response
  • Expanded System-Level Protections
  • 1-A Source/1.8-A Sink Gate Drivers
  • –40°C to 125°C Operating Temperature Range in a 16-Lead SOIC Package

2 Applications

  • 100-W to 800-W Power Supplies
  • Gaming
  • D-to-A Set-Top Boxes
  • Adapters
  • LCD, Plasma and DLP™ TVs
  • Home Audio Systems

3 Description

This part is identical to UCC28063 with the exception that the TSET pin Open/ Short Fault Detect and the CS pin Open Fault Detect features are removed. Removal of these Fault Detect features provides a higher degree of noise immunity to provide increased "ride-through" for applications where significant voltage noise could be coupled onto the TSET or CS pins during conditions of fast transient, surge or impulse noise on the AC Supply.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
UCC28063A SOIC (16) 9.90 mm × 3.91 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Typical Application Diagram

UCC28063A alt_snvsa88.gif

Input Ripple Current Reduction with Interleaving

UCC28063A alt2_lusao7.gif