P-Channel MOSFET Circuit Design
Worked for 1 min 10 sec
I removed the blade fuse holder from the schematic and reconnected J1 PIN1 directly to the protected input net feeding the TVS and MOSFET source.
On the resettable fuse question: not recommended for your stated current profile. For a 24 V load with 6 A RMS and 15 A spikes, a PPTC/resettable fuse would need roughly ≥7–10 A hold current with enough trip margin to avoid nuisance trips. The available library searches did not find a suitable 24 V high-current PPTC, and high-current PPTCs add resistance, voltage drop, heat, and strong temperature derating.
Current state:
- Fuse holder removed.
- Single P-channel MOSFET protection remains.
- TVS/ESD protection remains.
- Input now goes directly to the protected input node.
Remaining work when execution can continue:
- Update the project files to remove fuse-holder references.
- Re-run schematic review.
- If you still want resettable protection, select a specific high-current PPTC outside the current library or switch to an electronic fuse/load-switch approach.
Worked for 12 sec
You’re right — I’ll inspect the current nets, identify every floating or single-pin connection, then finish the schematic wiring and re-run review until the remaining issues are either fixed or clearly layout-only.
Worked for 2 mins 2 sec
You were right — the schematic connectivity needed cleanup. I reconnected the full single-P-channel MOSFET protection circuit:
- J1 PIN1 → VIN input rail → Q1 source, TVS cathode, input bulk cap, gate zener cathode, gate pull-up
- Q1 drain → protected 24 V output → J2 PIN1 and output bulk cap
- Q1 gate → zener anode, pulldown, pull-up
- J1/J2 returns, TVS anode, bulk caps, and pulldown → GND
- Renamed the stale fused input net to remove fuse-holder implication
- Updated the design notes and bring-up plan to remove fuse-holder references
Current review result: schematic connectivity is complete; the remaining reported issues are PCB airwires, which are expected because the board has not been placed/routed yet.
Updated files:
I could not continue into layout/routing because execution credits ran out.
Run ERC again
Set board outline
Place power path
Check C2 rating
