This reference design uses the UCC28742 flyback controller to generate two outputs (12 V at 2.2 A and 3.3 V at 1.5 A) from a universal input. UCC28742 uses an optical coupler to regulate the output and improve transient response. The valley-switching technique reduces switching losses and keeps the efficiency high.
| Output voltage options | PMP31087.1 | PMP31087.2 |
|---|---|---|
| Vin (Min) (V) | 85 | 85 |
| Vin (Max) (V) | 265 | 265 |
| Vout (Nom) (V) | 12 | 3.3 |
| Iout (Max) (A) | 2.2 | 1.5 |
| Output Power (W) | 26.4 | 4.95 |
| 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
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| Test report | 31-W Offline Valley Switching Flyback With Multiple Outputs Reference Design | PDF | HTML | Aug. 08, 2022 |
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