Optimizer / Breaker Reference Design
An illustrative module-level power electronics (MLPE) reference design for the generation side of PV & ESS: the single-module input (30–60 V) passes surge clamping and power-line common-mode filtering into a Buck-Boost MPPT power stage; a rapid shutdown (RSD) switch sits in series on the output, and shutdown commands are received from the string loop through a current transformer; the auxiliary supply is derived from the module bus by a wide-input buck. Each position is marked with the VOOHU parts available, recommended part numbers and package pinouts.
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 module input and MPPT power stage topology: the module connects through MC4 input J1; bidirectional TVS D1 (WHTB058VA) across the positive and negative lines clamps surges; the power-line common-mode choke L1 (WHAL-1513A-301T0) feeds the four-switch Buck-Boost power stage Q1, which uses the VOOHU molded power inductor L2 (WHYT2313 Series) for buck-boost conversion; the MCU outputs PWM through gate driver U2 to track the maximum power point. Only the positive line is drawn; the negative line returns through the lower winding of L1. Input capacitors, sense resistors and MOSFET support circuitry are not drawn.
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 PV module input | PV input (MC4) | J1 | — | — | Non-VOOHU |
| 02 | A PV module input | Bidirectional input TVS | D1 | TVS ESD | WHTB058VA | VOOHU |
| 03 | A PV module input | Input power-line common-mode choke | L1 | Power Line Common Mode Chokes | WHAL-1513A-301T0 | VOOHU |
| 04 | B MPPT power stage | Buck-Boost power MOSFETs (4-switch) | Q1 | — | — | Non-VOOHU |
| 05 | B MPPT power stage | Gate driver | U2 | — | — | Non-VOOHU |
| 06 | B MPPT power stage | MPPT power inductor | L2 | Molded Inductors | WHYT2313 Series | VOOHU |
| 07 | B MPPT power stage | Push-pull driver + rectifier | U5 | — | — | Non-VOOHU |
| 08 | B MPPT power stage | Push-pull xfmr (HS drive) | T2 | Push-Pull Transformers | WHST06001A0 | VOOHU |
| 09 | C Shutdown & output | Shutdown signal coupling current transformer | T1 | Current Transformers | WHPT-ER115-005 | VOOHU |
| 10 | C Shutdown & output | PLC demodulation / shutdown command detection | U3 | — | — | Non-VOOHU |
| 11 | C Shutdown & output | RSD shutdown MOSFET | Q2 | — | — | Non-VOOHU |
| 12 | C Shutdown & output | Shutdown driver | U4 | — | — | Non-VOOHU |
| 13 | C Shutdown & output | String output connector (MC4) | J2 | — | — | Non-VOOHU |
| 14 | D Control core | MCU (MPPT algorithm + shutdown logic) | U1 | — | — | Non-VOOHU |
| 15 | E Aux supply | Wide-input buck converter (module bus → 12 V) | U6 | — | — | Non-VOOHU |
| 16 | E Aux supply | Buck converter (12 V → 3.3 V) | U7 | — | — | Non-VOOHU |
| 17 | E Aux supply | Molded inductors ×2 (auxiliary power) | L3 L4 | Molded Inductors | WHYT0630 Series | VOOHU |
Resources & downloads
Board bill of materials
Reference designators, zones, VOOHU categories, recommended parts and availability for all 17 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 optimizer / breaker 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 specs (Voc / Isc), shutdown protocol (SunSpec / proprietary PLC) or power class, please include it in your requirements. We reply within 24 hours on working days.
