TIDUBE1D
January 2016 – August 2024
1
Description
Resources
Features
Applications
6
1
System Description
1.1
Key System Specifications
2
System Overview
2.1
Block Diagram
2.2
Highlighted Products and Key Advantages
2.2.1
UCC28180 – PFC Controller
2.2.2
UCC27524 – Dual Low-Side Gate Driver
2.2.3
UCC28881 – 700-V Off-Line Converter
2.3
System Design Theory
2.3.1
Selecting Switching Frequency
2.3.2
Calculating Output Capacitance
2.3.3
Calculating PFC Choke Inductor
2.3.4
Selecting Switching Element
2.3.5
Boost Follower Control Circuit
2.3.6
Bias Power
2.3.7
On-Off Switch
2.3.8
Thermal Design
3
Hardware, Testing Requirements, and Test Results
3.1
Required Hardware
3.1.1
Test Conditions
3.1.2
Recommended Equipment
3.1.3
Procedure
3.2
Test Results
3.2.1
Performance Data
3.2.1.1
Efficiency and iTHD
3.2.1.2
Standby Power and Output Voltage
3.2.2
Performance Curves
3.2.2.1
Efficiency Curve
3.2.2.2
Voltage Follower Performance
3.2.3
Functional Waveforms
3.2.3.1
Power On Sequence
3.2.3.2
Inrush Current Protection
3.2.3.3
Switching Node
3.2.3.4
Waveform Under 3.5kW, 230VAC
3.2.4
Thermal Measurements
4
Design Files
4.1
Schematics
4.2
Bill of Materials
5
Documentation Support
6
Trademarks
7
About the Author
8
Revision History
Features
Peak efficiency of > 98%, allowing a smaller heat sink
Wide full load operating input range of 190V to 270V AC
High power factor > 0.99 and < 5% THD from 1.4kW-to-3.8kW (28 to 108% of full load) under 230V AC
Up to 3.5kW high power output to cover most of single-phase input PFC application
On board bias supply to simplify test and verification
Robust output supply protected for output overcurrent, output overvoltage, and output undervoltage conditions
Meets requirements of EFT Norm IEC 6000-4-4 and Surge Norm IEC 61000-4-5
PCB Size 200 × 145mm.