Power Converter Schematic
Worked for 11 mins 35 sec
I prepared the full placement plan, but no PCB changes were applied because the account has no available ACUs.
Remaining
- Size/configure the board and 4-layer stackup
- Place all 99 components by functional and safety domains
- Verify overlaps, board bounds, creepage, and DRC
This transformerless mains design must maintain strict separation between HV, battery, and user-accessible control areas.
Start Auto-Layout
Thought for 3 sec
No PCB analysis or auto-layout changes could be performed because the account currently has no available ACUs.
Remaining work:
- Inspect the current board for existing placement and routing
- Configure the board outline/stackup if absent
- Auto-place all components with mains creepage, thermal, and high-current-loop constraints
- Route required nets and verify DRC, airwires, and safety clearances
Explain ACUs
Manual inspection help
Check ERC first
Set board manually
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Block Diagram
Power path
Text
230 VAC L/N/PE → input connector + 1 A fuse + 2 A breaker interface + 275 VAC MOV → NTC / relay-bypassed precharge → 3 mH common-mode / differential EMI filter + 100 nF X2 capacitors → isolated grid-voltage and Hall grid-current sensing + PQA connector → two-pole grid contactor with isolated coil driver and auxiliary feedback → LCL: 2 mH grid choke – 5 µF AC-rated damped shunt – 2 mH bridge choke → 650 V full bridge (four switches, isolated gate channels, dead-time/interlock) → 325–400 V DC link (≈470 µF / 450 V bank, bleeder + active discharge) → four-switch non-isolated bidirectional buck/boost (650 V HV leg, 80–100 V LV leg, 100 µH / ≥15 A inductor) → reverse-polarity protection + ≥15 A fuse + battery disconnect → 10.5–14.4 V battery / BMS connector
Control and sensing path
Text
PYNQ-Z2 3.3 V headers (SELV-side external board) ↔ digital isolators / optocouplers ↔ hazardous-domain PWM, enable, dead-time, relay, ESTOP and fault logic Grid voltage, grid current, DC-link voltage, battery voltage/current, temperature → isolated sensors / isolated amplifiers → conditioned 0–3.3 V feedback connector to PYNQ
Safety boundary
The complete converter power stage, battery terminals, BMS signals, hazardous-side driver supplies, and hazardous-side sensing circuits are potentially mains referenced. Only explicitly isolated interfaces to the external PYNQ-Z2 may be treated as SELV. Protective earth is provided only for enclosure/shield/Y-cap returns and must never be used as control return.
Reference matching decision
This unusual full-system converter has no assumed reusable monolithic reference block. Each power/protection/control block will be captured from scratch using library parts where exact pinouts are available and rating-explicit generic/reference symbols where exact power parts are unavailable. The design remains a teaching reference rather than a certified implementation.
Power path
Control and sensing path
Safety boundary
Reference matching decision
