This reference design is a 40-W dual-output offline converter using UCC28742, a secondary side regulator. A 5-V rail is regulated to within ±1% precision and cross regulation of 12-V rail is within -8%~+14% at 25% to 100% load. The design adopts a single-layer PCB for cost optimization. The peak efficiency is 82.68% at 115 V/60 Hz and 84.03% at 230 V/50 Hz. Power consumption at standby mode is 32.7 mW at 115 V/60 Hz and 57.51 mW at 230 V/50 Hz.
| Output voltage options | PMP40508.1 | PMP40508.2 |
|---|---|---|
| Vin (Min) (V) | 85 | 85 |
| Vin (Max) (V) | 265 | 265 |
| Vout (Nom) (V) | 5 | 12 |
| Iout (Max) (A) | 2 | 2.5 |
| Output Power (W) | 10 | 30 |
| Isolated/Non-Isolated | Isolated | Isolated |
| Input Type | AC | AC |
| Topology | Flyback- DCM | Flyback- DCM |
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 overview of design layout for component placement
Complete listing of design components, reference designators, and manufacturers/part numbers
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Design file that contains information on physical board layer of design PCB
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Detailed schematic diagram for design layout and components
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | AC Input, 5-V/2-A and 12-V/2.5-A Dual-Output Flyback Converter Reference Design | May 7, 2019 |
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