This reference design uses the UCC28910 in an upside-down buck topology to make a 12-V output capable of 30-mA loading from a 120-Vac input. The design achieves more than 70% efficiency at full loading. All components are placed on one side of the board to reduce assembly complexity and cost. The overall board dimensions are 1.35 inches by 1.35 inches with a max height of 0.3 inches (excluding test points). The floating output stays within 1% regulation across loading conditions.
| Output voltage options | PMP22210.1 |
|---|---|
| Vin (Min) (V) | 108 |
| Vin (Max) (V) | 132 |
| Vout (Nom) (V) | 12 |
| Iout (Max) (A) | .03 |
| Output Power (W) | .36 |
| Isolated/Non-Isolated | Non-Isolated |
| Input Type | AC |
| Topology | Buck- Upside Down |
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 | High-Efficiency Neutral-Less Upside-Down Buck Reference Design (Rev. A) | Jan. 28, 2020 |
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