This reference design utilizes two LM5148-Q1 single-phase synchronous buck controllers and four LMG3100R017 GaN FETs configured as a dual-phase, interleaved, synchronous buck converter. The converter generates a regulated 5V output capable of delivering a nominal 30A of current to the load, with a peak current capability of 60A, accepting an input voltage of between 24Vin to 60Vin (48Vin nominal). The design is built on a 6-layer PCB with 2-oz copper for each of the six layers. The evaluation board measures 5.0” x 3.4” (127.00mm x 86.36mm), however the actual converter solution size measures approximately 53.5mm x 52.0mm. This board is optimized for high efficiency across the entire load current range, which is achieved by configuring the converter to run in Pulse Frequency Modulation (PFM) mode at light loads.
| Output voltage options | PMP23392.1 |
|---|---|
| Vin (Min) (V) | 24 |
| Vin (Max) (V) | 60 |
| Vout (Nom) (V) | 5 |
| Iout (Max) (A) | 60 |
| Output Power (W) | 300 |
| Isolated/Non-Isolated | Non-Isolated |
| Input Type | DC |
| Topology | Buck- Multiphase |
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 | Dual-Phase Buck Converter Reference Design Using GaN FETs for 48V Automotive Applications | PDF | HTML | Feb. 16, 2024 |
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