This reference design is a two-stage, high-efficiency, 30kW power supply with a high voltage DC (HVDC) output. The first stage is a three-level flying capacitor power factor correction (PFC) converter running off of a three-phase input source. The PFC control is implemented with a TMS320F28P650DK high performance microcontroller. The flying capacitor topology is selected over more traditional topologies (for example, Vienna rectifier) due to a frequency doubling effect in the inductors. This doubling results in smaller and higher efficiency inductors. The PFC is followed by two Δ-Δ connected three phase inductor-inductor-capacitor (LLC) converters. There is one LLC for +400V and one for -400V. The LLC converters can be configured as separate supplies or as a single 800V output. The Δ-Δ connection provides reduced root-mean-square (RMS) currents. LLC control is implemented with a single TMS320F28P650DK high performance microcontroller.
| Output voltage options | PMP23630.1 |
|---|---|
| Vin (Min) (V) | 430 |
| Vin (Max) (V) | 530 |
| Vout (Nom) (V) | 800 |
| Iout (Max) (A) | 37.5 |
| Output Power (W) | 30000 |
| Isolated/Non-Isolated | Isolated |
| Input Type | |
| Topology | Boost- CCM^Full Bridge- LLC |
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
Includes TI products in the design and potential alternatives.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | 30kW HVDC AI Data Center Reference Design | PDF | HTML | Oct 7, 2025 |
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