This reference design is an offline isolated flyback. The AC-DC power stage is based on the UCC28750 fixed-frequency peak current mode controller, which features continuous conduction mode (CCM) and discontinuous conduction mode (DCM) modulation, as well as secondary-side regulation. Frequency foldback and burst mode improve light-load efficiency while frequency dithering reduces electromagnetic interference (EMI) signature. The controller provides several protection features, including over-under voltage lockout, Vout overvoltage, overpower, and short-circuit protections.
| Output voltage options | PMP31376.1 |
|---|---|
| Vin (Min) (V) | 90 |
| Vin (Max) (V) | 264 |
| Vout (Nom) (V) | 26.5 |
| Iout (Max) (A) | 4 |
| Output Power (W) | 106 |
| Isolated/Non-Isolated | Isolated |
| Input Type | AC |
| Topology | Flyback- Non Sync |
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
PCB layer plot file used for generating PCB design layout
Detailed schematic diagram for design layout and components
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | Universal AC Input to 9V–26.5V, 100W Battery Charger Reference Design | PDF | HTML | Nov 4, 2025 |
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