USB-C Temperature and Humidity Sensor Node

flux

I generated the closest available connectivity export here:
Download IPC-D-356 netlist — rp2350b-industrial-ethernet-controller.d356
Flux does not currently expose a direct KiCad .kicad_sch or Altium .SchDoc schematic export for this project. The available export is a connectivity/netlist-style file, not a full editable schematic with symbols, sheet graphics, and component placement.
For EasyEDA, the practical paths are:
  1. Best manual PCB-layout workflow
    • Export/download the netlist above.
    • Use the Flux schematic as the source of truth.
    • Recreate/import parts in EasyEDA.
    • Assign footprints manually.
    • Use the netlist to cross-check connectivity while routing.
  2. If you need a full editable EasyEDA schematic
    • The schematic must be manually rebuilt in EasyEDA from the Flux design.
    • Use the Flux BOM/component list, net names, and project notes as references.
    • This is safer than relying on a lossy conversion for a complex industrial controller.
  3. Do not treat this as manufacturing-ready yet
    • The design still has known unresolved blockers: ERC floating pins, USB-C/hub topology conflict, missing CC pull-downs/current-limit resistors, DI3 support issue, and isolation-ground refactor work.
enjoychul

enjoychul

"Design a robust, industrial-grade power supply circuit. Input is DC 24V with a PTC resettable fuse and a reverse polarity protection diode. Step down to 5V (3A max) using the LM2596S-5.0 with high-quality input/output capacitors and a shielded inductor. Then, add a high-reliability secondary LDO regulator to convert 5V into a clean, ripple-free 3.3V for an MCU."

flux

I’ll harden the existing 24V→5V→3.3V power section: inspect the current LM2596/LDO wiring, verify datasheet-critical passives, update sizing/properties, and run power/ERC checks.

flux

I reviewed and annotated the existing industrial power section against the LM2596S-5.0 and TLV1117LV33 datasheets.
Completed:
  • Confirmed existing parts: 24V screw terminal, SMBJ33A TVS, LM2596S-5.0, 33µH shielded inductor, SS34 Schottky, and TLV1117LV33 LDO.
  • Updated power-part properties and net metadata for current, temperature, thermal, and layout constraints.
  • Updated the Design Notes with the full power-section review and required fixes.
Important findings:
  • The existing 33µH inductor and SS34 diode are marginal for a robust 24V/3A industrial LM2596 design.
  • The schematic still needs explicit PTC fuse, reverse-polarity protection diode or ideal-diode MOSFET stage, and real LM2596 VIN/5V bulk capacitors.
  • The 3.3V LDO is electrically valid, but thermally risky above a few hundred mA continuous because it dissipates (5V − 3.3V) × IOUT. For a heavy RP2350B/W5500/USB-hub system, a 3.3V buck or buck-plus-LDO architecture is safer.
Fix power stage
Use buck for 3.3V
Run power review
Choose LCSC parts
Create power schematic
Sign up to send
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RP2350B Industrial Ethernet Controller thumbnail
Industrial-grade RP2350B controller with W5500 Ethernet, 24V input power, isolated industrial I/O, RS485, USB hub, relay outputs, and robust connector protection for -40°C to +85°C consumer/industrial use.

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