3.6 kW SiC totem-pole PFC with SCR-based inrush current limiter
← All reference designs · Vendor page: ST STEVAL-DPSTPFC1
| Hardware | orderable |
|---|---|
| Status | active |
| Application | ev-obc, ups, datacenter, telecom |
| Semiconductors | SiC, Si |
| Key devices | SCTW35N65G2V, TN3050H-12WY (SCR), STGAP2S, STM32F334, VIPER26 |
| Deliverables | schematic, bom, layout, firmware |
| Conversion | AC-DC |
| Topology | totem-pole-pfc |
| Power (W) | 3600 |
| Power basis | input |
| Input | 85–264 V AC |
| Output | 400 V DC |
| f_sw (kHz) | 72 (vendor-claimed) |
| Peak efficiency | 97.50 % (vendor-claimed) |
| Efficiency conditions | 230 Vac / 50 Hz, 3.6 kW input; 94.8 % at 110 Vac (1.6 kW). THD 3.7 % at the peak-efficiency point. |
| Bidirectional | no |
| Interleaved | no |
| Control | kind: digital; part: STM32F334 |
| Loss at peak η | 92.3 W (calculated, at rated power) |
| Last verified | 2026-10-21 |
Notes
Why it is interesting: the line-frequency leg uses thyristors (SCRs), which also act as an active inrush limiter at power-up and after line dropout. That removes the usual NTC + relay and is a neat trick worth knowing.
Watch out: power is quoted as input power (3.6 kW at 230 V; 1.6 kW at 110 V), so power_basis: input.
Some vendor material says 72 kHz, other material 75 kHz.
Related designs
Tags: scr-inrush-limiter · 4kv-surge-emc