This reference design provides a design template for implementing a three-level, three-phase plus neutral, Gallium Nitride (GaN) based flying capacitor power stage. The use of fast switching power devices allows switching at an equivalent frequency of 125kHz, reducing the size of magnetics for the filter and increasing the power density of the power stage. The multilevel topology allows the use of 650V rated power devices at higher DC bus voltages of up to 900V. The lower switching voltage stress across the transistors reduces the switching losses, resulting in an efficiency of 98.9% at full power.
| Output voltage options | TIDA-010957.1 | TIDA-010957.2 |
|---|---|---|
| Vin (Min) (V) | 200 | 650 |
| Vin (Max) (V) | 480 | 900 |
| Vout (Nom) (V) | 800 | 400 |
| Iout (Max) (A) | 22.5 | 21 |
| Output Power (W) | 18000 | 8400 |
| Isolated/Non-Isolated | Non-Isolated | Non-Isolated |
| Input Type | AC | DC |
| Topology | Boost- PFC | Buck- PFC |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Reference design overview and verified performance test data
Detailed overview of design layout for component placement
Complete listing of design components, reference designators, and manufacturers/part numbers
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Detailed schematic diagram for design layout and components
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Design guide | 15kW, Bidirectional, Three-Phase Plus Neutral Flying Capacitor Based on GaN Reference Design | PDF | HTML | Dec 29, 2025 |
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