This reference design uses the UCC28780 active clamp flyback controller to generate a 20-V/15-V/9-V/5-V adjustable output voltage. The maximum power rating is 65 W at 20-V output and up to 3 A at all other output voltage settings. This design reaches a peak efficiency of over 93% using silicon FETs, due to zero voltage switching (ZVS) and recaputuring the leakage energy. The high efficiency enables a small form factor and a high power density.
| Output voltage options | PMP21479.1 |
|---|---|
| Vin (Min) (V) | 85 |
| Vin (Max) (V) | 265 |
| Vout (Nom) (V) | 20 |
| Iout (Max) (A) | 3.25 |
| Output Power (W) | 65 |
| Isolated/Non-Isolated | Isolated |
| Input Type | AC |
| Topology | Flyback- Active Clamp |
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
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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 | 65W Active Clamp Flyback With Si FETs Reference Design for a High Power Density (Rev. A) | Apr. 29, 2020 | |
| Application note | Zero-Voltage-Switching Flyback Using UCC28780 Controller and UCC5304 Isolated Sy | Jul. 30, 2020 |
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