DC Charging Module Reference Design
An illustrative reference design for the control board of DC charging modules (30 / 40 kW, three-phase PFC + LLC) on the consumption / charging side of PV & ESS: the DSP runs the dual PFC and LLC control loops; the per-phase PFC switch currents and the LLC resonant current are sensed by high-frequency current transformers; push-pull transformers provide the isolated supplies for the power-switch drivers; and the module communicates with the billing control unit (TCU) over isolated CAN for paralleling and current sharing. The power-stage devices and the LLC main transformer are customized per power rating; this page marks the VOOHU parts available on the control board.
Illustrative PCB ⇄ Schematic
Illustrative top-side view arranged by functional zone (not the actual layout). Red numbered dots mark positions VOOHU can supply. Click a component on the board, an entry in the index below or a part in the schematic to see recommended parts and package pinouts on the right.
Illustrative PFC current-sense topology: the primary of the VOOHU current transformer T1 (WHPT-ER115-006) is in series with each phase's switch loop of the three-phase PFC; the voltage across the secondary sense resistor Rb is conditioned by U2 and fed to the DSP for peak current control and cycle-by-cycle protection. One phase is drawn; the other two are identical.
Board bill of materials
Summarized by position; click any row to locate it on the board above.
| No. | Zone | Position | Ref. | VOOHU category | Recommended part | Availability |
|---|---|---|---|---|---|---|
| 01 | A PFC sensing / driver supply | PFC phase CT ×3 | T1 | Current Transformers | WHPT-ER115-006 | VOOHU |
| 02 | A PFC sensing / driver supply | PFC current conditioning | U2 | — | — | Non-VOOHU |
| 03 | A PFC sensing / driver supply | Push-pull driver + rectifier / LDO | U3 | — | — | Non-VOOHU |
| 04 | A PFC sensing / driver supply | Push-pull isolation transformers ×N (power switch drive) | T2 | Push-Pull Transformers | WHST06010A0 | VOOHU |
| 05 | B LLC sensing | LLC resonant current transformer | T3 | Current Transformers | WHPT-ER115-006 | VOOHU |
| 06 | B LLC sensing | LLC current conditioning | U4 | — | — | Non-VOOHU |
| 07 | B LLC sensing | LLC main transformer (custom) | T4 | — | — | Non-VOOHU |
| 08 | C Parallel-operation CAN (isolated) | Parallel-operation CAN connector | J1 | — | — | Non-VOOHU |
| 09 | C Parallel-operation CAN (isolated) | CAN CMC | L1 | Signal Line Common Mode Chokes | WHAC-3225B-510U0 | VOOHU |
| 10 | C Parallel-operation CAN (isolated) | CAN ESD / TVS | D1 | TVS ESD | WHALD30E2B | VOOHU |
| 11 | C Parallel-operation CAN (isolated) | Isolated CAN transceiver | U5 | — | — | Non-VOOHU |
| 12 | C Parallel-operation CAN (isolated) | Push-pull driver + rectifier / LDO | U6 | — | — | Non-VOOHU |
| 13 | C Parallel-operation CAN (isolated) | Push-pull isolation transformer | T5 | Push-Pull Transformers | WHST06K02A0 | VOOHU |
| 14 | D Control core | DSP (PFC + LLC dual-loop control) | U1 | — | — | Non-VOOHU |
| 15 | E 12 V power | 12 V power input (auxiliary flyback) | J2 | — | — | Non-VOOHU |
| 16 | E 12 V power | Input power-line common-mode choke | L2 | Power Line Common Mode Chokes | WHAL-7060A-102T0 | VOOHU |
| 17 | E 12 V power | Buck converter (12 V → 5 V) | U7 | — | — | Non-VOOHU |
| 18 | E 12 V power | Buck converter (5 V → 3.3 V / core) | U8 | — | — | Non-VOOHU |
| 19 | E 12 V power | Molded inductors ×2 (DC-DC) | L3 L4 | Molded Inductors | WHYT0630 Series | VOOHU |
Resources & downloads
Board bill of materials
Reference designators, zones, VOOHU categories, recommended parts and availability for all 19 positions. Opens directly in Excel.
Datasheet collection
Datasheet PDFs for the VOOHU parts recommended on this board.
Design files & footprint library
Schematic, PCB, and VOOHU part footprints and 3D models.
Coming soonRequest the DC charging module reference design full package
Includes the full-board position list, datasheets for the recommended VOOHU parts and position-by-position selection notes. For selection advice tailored to your module power, output voltage range or custom magnetics (LLC main transformer / resonant inductor), please include it in your requirements. We reply within 24 hours on working days.
