This is a reference design of an ultra-wide input range (20.4 Vac to 276 Vac) AC-DC Buck converter. Using the UCC28881 controller, we only need minimum number of discrete components as main switch and high voltage startup circuits (with low quiescent current needed) are already integrated in the controller. To allow sufficient supply current to the UCC28881 controller, a depletion MOSFET circuit is added as a low power dissipation current source. This design is able to provide 12 V/50 mA output.
| Output voltage options | PMP21007.1 |
|---|---|
| Vin (Min) (V) | 20.4 |
| Vin (Max) (V) | 276 |
| Vout (Nom) (V) | 12 |
| Iout (Max) (A) | .05 |
| Output Power (W) | .6 |
| Isolated/Non-Isolated | Non-Isolated |
| Input Type | AC |
| Topology | Buck- 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 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
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | HV AC-DC Buck Converter Reference Design With Ultra Wide Input Voltage Range | Dec. 19, 2018 |
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