UCC28742 (ACTIVE) High-Efficiency Flyback Controller With Optocoupler Feedback

AC input, 5-V/2-A and 12-V/2.5-A dual-output flyback converter reference design

This reference design is a 40-W dual-output offline converter using UCC28742, a secondary side regulator. A 5-V rail is regulated to within ±1% precision and cross regulation of 12-V rail is within -8%~+14% at 25% to 100% load. The design adopts a single-layer PCB for cost optimization. The (...)

• Schematic/Block Diagram
• Bill of Materials
• Technical Reference
• Layer Plot
• Assembly Drawings
• CAD Files
• Gerber Files

• TI Devices
  TL431LI
  UCC28742

AC Input, 5-V/1-A and 5-V/1-A dual-output flyback reference design

This design is auxiliary power supply with 5-V/1-A and 5-V/1-A dual output. The line and load regulation of the power supply is designed to be within 1% using the secondary side regulator, UCC28742. The system's reliability is improved through input UVLO and output OVP, OCP, SCP. The four point's (...)

• Schematic/Block Diagram
• Bill of Materials
• Technical Reference
• Layer Plot
• Assembly Drawings
• CAD Files
• Gerber Files

• TI Devices
  ATL431
  UCC28742

AC Input,12-V/5-A and 50-V/1-A dual-output flyback reference design

This reference design is a 12-V/5-A and 50-V/1-A isolated dual-output auxiliary power supply. Secondary-side regulation improves the line and load regulation using UCC28742. DCM valley-switching operation enable higher efficiency at light load. All components height below 20 mm enable slim TV (...)

• Schematic/Block Diagram
• Bill of Materials
• Technical Reference
• Layer Plot
• Assembly Drawings
• CAD Files
• Gerber Files

• TI Devices
  ATL431
  UCC28742

90-VAC - 265-VAC input, non-isolated flyback reference design with multiple output

This offline flyback reference design uses the UCC28742 controller to generate a non-isolated output (15 V at 130 mA) and an isolated output (24 V at 830 mA) from an AC input (90 VAC - 265 VAC). The UCC28742 provides a cost effective and precise constant-voltage and constant-current regulation. The (...)

• Schematic/Block Diagram
• Bill of Materials
• Technical Reference
• Layer Plot
• Assembly Drawings
• CAD Files
• Gerber Files

• TI Devices
  UCC28742

25/50 Watt flyback reference design for audio applications

The quasi-resonant flyback design is a dual output converter with a 24 Volt output and a 6 Volt output. The voltages that are supplied are important for supplying power in audio applications. The design is very low noise for sensitive audio signals with less than 2.5 % voltage ripple on the 24 V (...)

• Schematic/Block Diagram
• Bill of Materials
• Technical Reference
• Layer Plot
• Assembly Drawings
• CAD Files
• Gerber Files

• TI Devices
  LMV431A
  TLV1117
  UCC28742

12-Watt Magnetically Resistant Quasi-Resonant Flyback Reference Design

This reference design is a quasi-resonant flyback developed to be resistant to large magnetic fields near the transformer. It has a regulated 4 Volt output that can handle up to 2 A of current and secondary 10 V output that can handle 0.4 A.

• Schematic/Block Diagram
• Bill of Materials
• Technical Reference
• Layer Plot
• Assembly Drawings
• CAD Files
• Gerber Files

• TI Devices
  UCC28742
  TLV431A

6-Watt Magnetically Resistant Quasi-Resonant Flyback Reference Design

This reference design is a quasi-resonant flyback developed to be resistant to large magnetic fields near the transformer. It has a regulated 3.6 Volt output that can handle up to 1 A of current and secondary 12 V output that can handle 0.2 A.

• Schematic/Block Diagram
• Bill of Materials
• Technical Reference
• Layer Plot
• Assembly Drawings
• CAD Files
• Gerber Files

• TI Devices
  TLV431A
  UCC28742