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Overview
| Topology | LLC Resonant Converter |
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 7443251600 | SPEC | 8 files | Active i| Production is active. Expected lifetime: >10 years. | WE-HCI SMT Flat Wire High Current Inductor | 6.25 | 3.2 | 6.5 | 34.5 | 18 | – | 16 | 37.95 | – | – | Superflux | 10.5 | 10.2 | 4.7 | SMT | ||
 | 7448030509 | SPEC | 10 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CMBNC Common Mode Power Line Choke Nanocrystalline | – | – | – | – | – | 5 | 9000 | 32 | 300 | 2100 | Nanocrystalline | 23 | 13.5 | 26 | THT | ||
 | 7447018 | SPEC | – | 6 files | Active i| Production is active. Expected lifetime: >10 years. | WE-FI Leaded Toroidal Line Choke | – | – | – | – | – | 2.5 | 150 | 100 | – | – | – | 16.5 | 10.7 | – | THT | |
 | 750317229 | SPEC | – | 4 files | Active i| Production is active. Expected lifetime: >10 years. | Transformer | – | – | – | – | – | – | 190 | – | – | 3000 | – | 26.5 | 32.1 | 11 | THT | |
 | 750317297 | SPEC | – | 4 files | Active i| Production is active. Expected lifetime: >10 years. | Inductor | – | – | – | – | – | – | 77.5 | – | – | 500 | – | 26.5 | 31.2 | 11 | THT |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 7443251600 | SPEC | |
| 7448030509 | SPEC | |
| 7447018 | SPEC | – |
| 750317229 | SPEC | – |
| 750317297 | SPEC | – |
| Samples |
|---|
| 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 |
|---|
