This reference design uses two LM5155 devices to make a flyback and boost power stage. The flyback creates an isolated 28 Vdc bus from a 24 +/-10% Vdc bus and the boost creates a 37 Vdc bus from the output of the flyback. The flyback can be loaded up to 70 W and the boost can be loaded up to 37-W. All components are placed on one side of the board to reduce assembly complexity and cost. Both power stages achieve over 90% efficiency across output conditions.
| Output voltage options | PMP22151.1 | PMP22151.2 |
|---|---|---|
| Vin (Min) (V) | 18 | 27 |
| Vin (Max) (V) | 29 | 29 |
| Vout (Nom) (V) | 28 | 37 |
| Iout (Max) (A) | 2.5 | 1 |
| Output Power (W) | 70 | 37 |
| Isolated/Non-Isolated | Isolated | Non-Isolated |
| Input Type | DC | DC |
| Topology | Flyback- CCM | Boost- 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
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | 70-W Flyback and 37-W Boost Power Reference Design | Nov. 19, 2019 |
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