This reference design converts a wide 85-Vac to 480-Vac input to a pair or reinforced, isolated 12-V and 24-V outputs. The 12-V output is capable of 14-W loading, and the 24-V output is capable of 2.4-W loading. This reference design uses UCC28730 as a PSR valley-switching flyback design. A Silicon-Carbide (SiC) low-side FET is used to achieve high efficiencies while operating across a wide input range. A balancing cap on the secondary side keeps the two outputs in close regulation regardless of loading conditions.
| Output voltage options | PMP22529.1 | PMP22529.2 |
|---|---|---|
| Vin (Min) (V) | 90 | 90 |
| Vin (Max) (V) | 480 | 480 |
| Vout (Nom) (V) | 24 | 12 |
| Iout (Max) (A) | .1 | 1.167 |
| Output Power (W) | 2.4 | 14.004 |
| 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
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Design file that contains information on physical board layer of design PCB
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| Type | Title | Date | ||
|---|---|---|---|---|
| Test report | 16-W SiC FET PSR Flyback Reference Design | PDF | HTML | Feb. 09, 2022 |
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