This offline flyback reference design uses the UCC28722 controller to generate 2 isolated outputs (5 V at 400 mA, 24 V at 300 mA) from an AC input (85 VAC - 480 VAC). The UCC28722 output drive interfaces to a bipolar transistor power switch, enabling a more efficient design than a typical design. The valley-switching technique reduces switching losses and keeps the efficiency high. The controller provides constant-voltage and constant-current regulation without the use of an optical-coupler.
| Output voltage options | PMP30281.1 | PMP30281.2 |
|---|---|---|
| Vin (Min) (V) | 85 | 85 |
| Vin (Max) (V) | 480 | 480 |
| Vout (Nom) (V) | 5 | 24 |
| Iout (Max) (A) | .4 | .3 |
| Output Power (W) | 2 | 7.2 |
| Isolated/Non-Isolated | Isolated | Isolated |
| Input Type | AC | AC |
| Topology | Flyback- Quasi Resonant | Flyback- Quasi Resonant |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Test results for the reference design, including efficiency graphs, test prerequisites and more
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | 85-VAC - 480-VAC Input, Multiple Output Flyback Reference Design | Dec. 12, 2018 |
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