This reference design is a negative-to-positive synchronous buck-boost converter for power amplifier applications. The circuit is powered from the nominal -48-V system source to provide an output voltage of +48 V at 25 A. The design uses two dual synchronous boost controllers for 4-phase operation at a switching frequency of 150 kHz. Output voltage adjustment to +30 V is jumper selectable. 1- through 4-phase operation is also jumper selectable.
| Output voltage options | PMP21943.1 |
|---|---|
| Vin (Min) (V) | -60 |
| Vin (Max) (V) | -36 |
| Vout (Nom) (V) | 48 |
| Iout (Max) (A) | 25 |
| Output Power (W) | 1200 |
| Isolated/Non-Isolated | Non-Isolated |
| Input Type | DC |
| Topology | Buck Boost- Synchronous |
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
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Design file that contains information on physical board layer of design PCB
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Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | 48-V / 25-A Negative-to-Positive Synchronous Buck-Boost Reference Design | Sep. 10, 2019 |
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