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Overview
| Topology | Power Factor Correction |
| IC revision | 1.0 |
Description
This design uses a Critical Conduction Mode (CrCM/DCM) PFC (AC-400 VDC), followed by an LLC DC-DC (400-19 VDC). For both stages, the switching frequency was increased to the maximum allowed by the off-the-shelf control ICs available. The board is designed to be a ‘demonstration’ board, and is not yet optimized as a production design. With this design, a power density of 2.18 W/cc or 35.75 W/in3 is achieved, which is around 2x typical and 40% more than the best-on-class Si-based design today. Customer designs are expected to achieve even higher power density. The PFC section is a standard ON Semi NCP1615 CrCM/DCM powering 2x NV6115 (parallel) GaNFast Power ICs directly. Critical mode PFC (also known as boundary mode) is a soft-switching topology which allows higher frequency operation. The DC-DC section uses the NCP13992 current-mode resonant controller (LLC) driving NV6115s. The NV6115s have monolithically-integrated gate drivers, so the NCP13992’s drivers are not used and loss is minimized.
Typical applications
- PFC
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | fres(MHz) | IR(A) | L(µH) | RDC max.(mΩ) | VR(V (AC)) | VT(V (AC)) | Material | L(mm) | W(mm) | H(mm) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCI SMT Flat Wire High Current Inductor, 6.25 A, 3.2 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | Performance Rated Current6.25 A | Saturation Current @ 10%3.2 A | Saturation Current @ 30%6.5 A | DC Resistance34.5 mΩ | Self Resonant Frequency18 MHz | – | Inductance16 µH | DC Resistance37.95 mΩ | – | – | MaterialSuperflux | Length10.5 mm | Width10.2 mm | Height4.7 mm | MountSMT | ||||
 | WE-CMBNC Common Mode Power Line Choke Nanocrystalline, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CMBNC Common Mode Power Line Choke Nanocrystalline | – | – | – | – | – | Rated Current5 A | Inductance9000 µH | DC Resistance32 mΩ | Rated Voltage300 V (AC) | Insulation Test Voltage2100 V (AC) | MaterialNanocrystalline | Length23 mm | Width13.5 mm | Height26 mm | MountTHT | ||||
 | WE-FI Leaded Toroidal Line Choke, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-FI Leaded Toroidal Line Choke | – | – | – | – | – | Rated Current2.5 A | Inductance150 µH | DC Resistance100 mΩ | – | – | – | Length16.5 mm | Width10.7 mm | – | MountTHT | |||
 | 750317229 | Transformer, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Transformer | – | – | – | – | – | – | Inductance190 µH | – | – | Insulation Test Voltage3000 V (AC) | – | Length26.5 mm | Width32.1 mm | Height11 mm | MountTHT | ||
 | 750317297 | Inductor, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product series Inductor | – | – | – | – | – | – | Inductance77.5 µH | – | – | Insulation Test Voltage500 V (AC) | – | Length26.5 mm | Width31.2 mm | Height11 mm | MountTHT |