SLUSAO7C
September 2011 – July 2024
UCC28063
PRODUCTION DATA
1
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Principles of Operation
7.3.2
Natural Interleaving
7.3.3
On-Time Control, Maximum Frequency Limiting, and Restart Timer
7.3.4
Distortion Reduction
7.3.5
Zero-Current Detection and Valley Switching
7.3.6
Phase Management and Light-Load Operation
7.3.7
External Disable
7.3.8
Improved Error Amplifier
7.3.9
Soft Start
7.3.10
Brownout Protection
7.3.11
Dropout Detection
7.3.12
VREF
7.3.13
VCC
7.3.14
Control of Downstream Converter
7.3.15
System Level Protections
7.3.15.1
Failsafe OVP - Output Overvoltage Protection
7.3.15.2
Overcurrent Protection
7.3.15.3
Open-Loop Protection
7.3.15.4
VCC Undervoltage Lock-Out (UVLO) Protection
7.3.15.5
Phase-Fail Protection
7.3.15.6
CS-Open, TSET-Open and -Short Protection
7.3.15.7
Thermal Shutdown Protection
7.3.15.8
AC-Line Brownout and Dropout Protections
7.3.15.9
Fault Logic Diagram
7.4
Device Functional Modes
8
Applications and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Inductor Selection
8.2.2.2
ZCD Resistor Selection (RZA, RZB)
8.2.2.3
HVSEN
8.2.2.4
Output Capacitor Selection
8.2.2.5
Selecting (RS) For Peak Current Limiting
8.2.2.6
Power Semiconductor Selection (Q1, Q2, D1, D2)
8.2.2.7
Brownout Protection
8.2.2.8
Converter Timing
8.2.2.9
Programming VOUT
8.2.2.10
Voltage Loop Compensation
8.2.3
Application Curves
8.2.3.1
Input Ripple Current Cancellation with Natural Interleaving
8.2.3.2
Brownout Protection
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
Development Support
11.1.1.1
Related Parts
11.1.2
Device Nomenclature
11.1.2.1
Detailed Pin Description
11.2
Documentation Support
11.2.1
Related Documentation
11.3
Trademarks
11.4
Electrostatic Discharge Caution
11.5
Glossary
12
Mechanical, Packaging, and Orderable Information
11.1
Device Support