Diseño de Circuito DC
Asigna MPNs adecuados a los 14 pasivos genéricos faltantes.
Thought for 6 sec
Voy a revisar valores/paquetes de los 14 pasivos genéricos, elegir MPNs adecuados y asignarlos con fabricante para limpiar el check de manufactura.
Worked for 2 mins 59 sec
Listo: asigné MPNs y fabricantes a los 14 pasivos genéricos faltantes.
Verificación:
- El check de Manufacturer Part Number quedó limpio: no quedan errores/warnings abiertos por MPN faltante.
Nota importante:
- Para C1/C2/C3 y L1 elegí partes reales con rating adecuado, pero son físicamente más grandes que un footprint genérico simple; antes de fabricar conviene revisar/ajustar footprint y layout de esos componentes.
Siguientes pasos sugeridos:
- Revisar footprint real de C1, C2, C3 y L1.
- Reforzar copper/fills de potencia.
- Correr revisión pre-manufactura completa.
Fix footprints and review
Fix passive footprints
Reinforce power copper
Run final review
Check BOM sourcing
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Power Design and Bring-Up
Requirements
- Input: regulated 24 V DC via Phoenix-style PCB terminal.
- Outputs:
- 12 V pin-style output, target 3 A.
- 5 V pin-style output for ESP32 dev kit.
- 5 V USB-A output for Android device, target 3 A.
- 5 V auxiliary JST PH 2-pin output for a short LED strip.
- 5 V auxiliary JST PH 2-pin output for an external ESP32-S3-Touch-LCD-2.8C display power input only.
- Form factor: compact PCB.
Architecture
- Input protection: resettable PTC fuse F1 and 36 V working TVS D1 across the fused 24 V bus.
- 12 V rail: U1 LMR33630ADDA synchronous buck regulator, 36 V max input class, configured for 12 V using R1=110 kΩ and R2=10 kΩ feedback divider. L1 is set to 15 µH with 4 A saturation-current target.
- 5 V rail: U2 CCG30-24-05S 24 V nominal isolated DC/DC module, 5 V/6 A, feeding USB-A, ESP32 5 V header, flowmeter supply, relay coils, and the new auxiliary 5 V outputs.
- Output connectors: USB-A for Android power, 2.54 mm through-hole pin headers for 12 V/5 V pin outputs, JST PH 2.0 mm 2-pin connectors for LED/display auxiliary 5 V outputs, and Phoenix/KF series connectors for field wiring.
Power Budget
- 12 V output: 12 V × 3 A = 36 W.
- 5 V USB-A: 5 V × 3 A = 15 W.
- ESP32 dev kit: assume up to ~0.5–1 A transient budget on 5 V rail unless user specifies otherwise.
- 5 V converter selected at 6 A = 30 W total rail capacity. USB-A may consume up to 3 A; reserve approximately 0.5–1 A for the ESP32 dev kit and small control loads, leaving about 2 A nominal for auxiliary LED/display loads unless USB current is lower.
- New LED strip current is not yet specified. Treat J12 as a low-current auxiliary output until the LED strip part/power is confirmed.
- J12/J13 use JST PH 2.0 mm compact connectors, typically around 2 A/contact depending on exact mating housing, wire gauge, and temperature rise; do not use either output above connector rating.
- Total output power worst case is approximately 58–66 W depending on 5 V auxiliary loads. Expected 24 V input current is roughly 2.7–3.3 A plus margin, depending on converter efficiency.
Bring-Up Checklist
- Before applying power, check continuity: VIN_24V_FUSED to GND should not be shorted; VOUT_12V to GND should not be shorted; VOUT_5V to GND should not be shorted.
- Apply current-limited 24 V input with no loads attached.
- Verify fused input rail after F1 is near 24 V.
- Verify VOUT_12V is near 12 V.
- Verify VOUT_5V is near 5 V.
- Attach ESP32 dev kit first and verify boot stability.
- Attach USB-A Android device and verify 5 V remains within tolerance under load.
- Attach LED strip on J12 and external display on J13 one at a time; verify VOUT_5V remains within tolerance and connectors do not heat.
- Add 12 V load gradually up to 3 A while checking regulator temperature.
Open Engineering Notes
- Confirm the exact USB-A receptacle current rating before production; many USB-A connectors are mechanically compatible but not all are rated for continuous 3 A.
- Confirm U1 feedback reference and inductor/capacitor values against the LMR33630 datasheet before layout release.
- If the final product must tolerate industrial 24 V transients, consider a higher-energy TVS and input EMI filter sized to the installation environment.
Requirements
Architecture
Power Budget
Bring-Up Checklist
Open Engineering Notes
