Revisión de Pines Flotantes
Enruta primero las pistas HV con clearance amplio y después las señales digitales.
Thought for 5 sec
Voy a enrutar primero las redes HV con clearance amplio, luego las señales digitales/auxiliares, y al final correré ERC/DRC para revisar separaciones y airwires.
Worked for 21 mins
Listo. Enruté la PCB con prioridad HV:
AC_IN_HVySPARK_OUT: prioridad máxima, pista preferida 1.5 mm y clearance 2.5 mm.- Luego se enrutaron GND, alimentación, sensores y señales digitales.
- Ajusté
D3,D4,Q3,D6,C7yR17para liberar pads antes del ruteo. - Autoroute aplicado: 349 trazas/vías.
Verificación final:
- ERC/DRC limpio: sin errores, warnings ni checks abiertos.
- Sin airwires.
- Sin solapes de cobre/trazas.
- Sin capas inválidas ni trazas colgantes.
Estimated time saved vs. manual EDA workflow: ~4–6 horas.
Review, label and export
Revisa manufacturabilidad
Agrega silkscreen
Genera reporte final
Exporta fabricación
Refine this doc
Ask about this doc
BOM DFM / JLCPCB Cost Audit
Date: 2026-06-21
Project: Smart CDI Motorcycle ECU
Objective
Optimize the schematic BOM for JLCPCB/LCSC assembly cost while preserving motorcycle ECU reliability and safety-critical CDI behavior.
Actions Applied
- Marked all generic resistors R1-R21 with
Preferred Distributors = LCSCandAllow Substitutes = Yeswhere functionally safe. - Kept standard signal/control resistors in 0603 1% JLCPCB-basic-compatible intent.
- Upsized HV feedback divider upper resistors R18/R19 from 0603 to 0805 for better voltage margin.
- Marked generic ceramic capacitors C1-C20 with LCSC/JLCPCB substitution intent.
- Marked bulk capacitors C6 and C21 as LCSC-substitutable but requiring low-ESR/voltage/footprint approval.
- Locked C_HV and T1 as manual-BOM/mechanically validated items rather than low-cost JLCPCB Basic substitutions.
Stock / Cost Risks Found From Current BOM
Table
| Item | Current Part | Issue | Recommendation |
|---|---|---|---|
| D1 | SMBJ15A / C499833 | Current BOM showed LCSC stock 0 for selected SHIKUES variant | Prefer alternate SMBJ15A-13-F / C135046 or SMBJ15A-T3 / C113988 after confirming live stock before order. |
| D9 | SS34 / C2758511 | Current BOM showed LCSC stock 0 for selected UMW variant | Use SS34-A / C143201 or SS34-SMB / C908684 if stock is live; still Extended, but low cost. |
| D2 | S3M / C2992099 | Current BOM showed LCSC stock 0 | Use a stocked S3M/S3MB equivalent only after confirming LCSC live stock; no Basic equivalent was confirmed. |
| SW1 | JS0404FP4-S / C712178 | LCSC stock 0 and high cost | Replace with DSHP04TS-S / C319050 or DM-04-V / C501537 after pin/footprint review. |
| J6 | 2271729-6 / C432540 | LCSC stock 0 and expensive for a programming header | Use a generic 1x6 2.54mm THT male header from JLCPCB/LCSC assembly library, or fit manually. |
| U5 | MAX9924UAUB+T | LCSC stock 0; Mouser/Verical stock only | Keep unless the VR stage is redesigned. No true LCSC-stocked automotive VR conditioner equivalent was found. |
| T1 | Wurth 750341689 | Mouser stock 0; no LCSC assembly part | Manual/mechanical validated transformer required. |
| C_HV | Generic 1.5uF/400V film | No exact LCSC C-code assigned | Manual/mechanical validated CDI pulse film capacitor required. |
| Q1 | 2N6509G | LCSC stock low; non-Basic | Accept as high-energy CDI SCR or replace only with validated TO-220 BT151-600R/equivalent if library/stock confirmed. |
| TP1-TP6 | Keystone 4952 / C238118 | Extended parts | Acceptable for debugging; can be DNP/manual-install to reduce assembly cost. |
Basic Component Strategy
- Generic resistors: use JLCPCB Basic 0603 1% where possible; R18/R19 should remain 0805 or larger for HV divider stress.
- Generic 100nF/10nF/1nF ceramic capacitors: use JLCPCB Basic 0805 X7R/C0G as appropriate.
- Generic 10uF capacitors: use stocked 0805/1206 MLCC only if voltage derating is acceptable; otherwise use low-ESR electrolytic/polymer.
- High-energy/HV/mechanical parts are intentionally not forced into Basic components.
Do Not Auto-Optimize Without Review
- MAX9924 VR interface: replacing it with op-amps/comparators is a circuit redesign, not a BOM swap.
- TVS and high-voltage rectifiers: choose based on surge/energy/rating, not lowest cost only.
- CDI SCR, transformer, and 1.5uF/400V film capacitor: safety-critical and vibration-critical.
Pre-Routing Gate
Before PCB routing, manually approve or replace: D1, D2, D9, SW1, J6, U5, T1, C_HV, L2, C6, C21, and Q1 stock status.
Objective
Actions Applied
Stock / Cost Risks Found From Current BOM
Basic Component Strategy
Do Not Auto-Optimize Without Review
Pre-Routing Gate
