INA219 Current Measurement Audit
Task unable to complete.
2:13
Thought for 16 sec
Accessing knowledge.
Running 5 design checks.
Read schematic for J1, F2, Q2 and 7 more.
Completed 5 design checks — found 39 issues.
Running 5 design checks... (28 sec)
Read layout for Q2, F2, D3 and 5 more.
Thought for 10 sec
Work done
- Audited the scoped Q2 input-protection area and verified the corrected schematic connectivity.
- DRC still reports scoped layout problems: VIN_FUSED airwire between
F2:P2andQ2:D, VIN_PROTECTED airwires involvingQ2:S,D6:K, andR6:P2, plus stale/dangling trace remnants and an overlap atQ2:D. - Created the detailed status file: Q2 Input Protection Routing Remediation Status.
- ❌ Stale traces were identified but not removed in this run.
- ❌ The physical path is not yet fully routed as
J1 P1 -> F2 -> VIN_FUSED -> Q2 -> VIN_PROTECTED -> D3/C7/FB2 -> VIN_FILTERED. - ❌ DRC is not clean in the scoped area; airwires/dangling/overlap issues remain.
- ✅ The corrected schematic topology still supports reverse-polarity blocking, but the PCB must be cleaned/rerouted before fabrication.
Perform the physical trace cleanup/reroute in the PCB editor for the listed scoped items, then rerun DRC to confirm the Q2 input-protection area is clear.
Locate routing issues
Fix Q2 remnants
Route VIN_PROTECTED
Run targeted DRC
Refine this doc
Ask about this doc
Q2 Input Protection Routing Remediation Status
Scope
Focused on Q2, F2, D3, D6, R5, R6, C7, FB2 and nets VIN_RAW, VIN_FUSED, VIN_PROTECTED, VIN_GATE, and GND.
Corrected schematic reference
- J1:P1 and F2:P1 are on VIN_RAW.
- F2:P2 and Q2:D are on VIN_FUSED.
- Q2:S, D3:K, D6:K, C7:P1, R6:P2, and FB2:1 are on VIN_PROTECTED.
- Q2:G, D6:A, R5:P1, and R6:P1 are on VIN_GATE.
- R5:P2, C7:P2, D3:A, and J1:P2 are on GND.
- FB2:2, U1:VIN, C1:1, and C3:P1 are on VIN_FILTERED.
DRC findings in the scoped area
The current layout still reports input-protection routing issues after the Q2 source/drain schematic correction:
Table
| Check | Affected items | Interpretation |
|---|---|---|
| Airwire | D6:K and Q2:S on VIN_PROTECTED | VIN_PROTECTED copper is incomplete around Q2/D6. |
| Airwire | R6:P2 on VIN_PROTECTED | R6 source-bias side is not physically completed to VIN_PROTECTED. |
| Airwire | Q2:D and F2:P2 on VIN_FUSED | VIN_FUSED physical connection from F2 to Q2 drain is not completed. |
| Overlapping copper | Trace 0292 overlaps Q2:D | Stale copper from the previous source/drain routing appears to remain at Q2 drain. |
| Dangling traces | Trace 1855, 45f1, 4f4c, 8aa5 | There are dangling trace remnants requiring cleanup before rerouting. |
Required physical routing path
The routed copper must be revised to follow:
J1:P1 -> F2:P1 -> F2:P2 / VIN_FUSED -> Q2:D -> Q2:S / VIN_PROTECTED -> D3:K + C7:P1 + FB2:1 -> FB2:2 / VIN_FILTERED -> U1:VIN.
Ground return in this stage is:
J1:P2 -> GND, shared with D3:A, C7:P2, and R5:P2.
Gate/clamp routing must remain:
Q2:G / VIN_GATE -> D6:A + R5:P1 + R6:P1, with D6:K and R6:P2 returning to Q2:S / VIN_PROTECTED.
Reverse polarity conclusion
With the corrected schematic topology, Q2 drain is on the fused input side and source is on the protected load side. That is the intended high-side PMOS reverse-polarity arrangement: correct-polarity input allows startup and channel conduction, while reverse polarity should not energize VIN_PROTECTED or the downstream 5V rail through Q2. The PCB must still remove stale copper and complete the VIN_FUSED/VIN_PROTECTED routing before fabrication.
Status
Audit completed, but the physical routing was not successfully modified in this run. The layout still requires routing cleanup for Trace 0292 and the listed airwires/dangling traces in the scoped Q2 input-protection area before the success criteria can be met.
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