This reference design features a dual-phase automotive boost converter for Class-H audio applications offering analog or digital output voltage tracking. The peak output power of over 800W can be achieved at 11V input voltage.
This test report is based on the LM5125-Q1, which is configured using external resistors. The pin-compatible LM51251-Q1 variant offering I²C for diagnostic and control can also be used on this design.
| Output voltage options | PMP31263.1 |
|---|---|
| Vin (Min) (V) | 9 |
| Vin (Max) (V) | 18 |
| Vout (Nom) (V) | 40.8 |
| Iout (Max) (A) | 25 |
| Output Power (W) | 1020 |
| Isolated/Non-Isolated | Non-Isolated |
| Input Type | DC |
| Topology | Boost- 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
| Type | Title | Date | ||
|---|---|---|---|---|
| Test report | Dual-Phase Boost Converter Reference Design for Class-H Audio Applications | PDF | HTML | Mar. 18, 2025 |
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