Job 3G1 Correction
Thought for 35 sec
Thought for 11 sec — Inspecting project components
Reading layout details of LTC4373HDD#TRPBF.
Looking at the board of LTC4373HDD#TRPBF.
Reading symbol pins.
Thought for a moment
Analyzing pin layout issues
I see that there are problems with the EP terminal, which was generated as a perimeter pin, and the thermal pad being unbound. The project is HellzGate, but I can't mutate external components. I wonder if I can fix it by checking the part layout or submitting a quality issue. The pin placement seems incorrect too: the left row should have pins ordered as OUT 1, GATE 2, SOURCE 3, IN 4, while the right row has issues with UV and EP placements as well. This definitely needs attention!
Addressing thermal pad issue
Oh no, the thermal pad is separate and
there are two pads "IN_5" and "GND_4" which look like they should simply be GND
Thought for 11 sec
Those pads indicate the TPS259830ONRGER, not the LTC4373. They must not both be GND:
IN_5/ Thermal Pad 1 → INGND_4/ Thermal Pad 2 → GND
TI specifies two electrically distinct exposed pads; shorting both to GND would directly short the input rail. The footprint naming may be awkward, but that separation is electrically required.
Audit both footprints
Fix LTC4373 part
Inspect TPS259830 part
Remove bad LTC4373
Create repair plan
Refine this doc
Ask about this doc
Schematic Completion Pass 1 Checkpoint
Purpose
This file preserves the exact corrected-project stop point and resume order. Do not restart or rebuild the project. Preserve all existing schematic edits, component assignments, net names, architectural decisions, and unresolved items.
Project status
- Production status: STOP-SHIP.
- Corrected schematic: partial; not independently reviewable.
- PCB layout and manufacturing outputs: not authorized.
- Resume from the current live schematic state.
Completion Pass 1 — completed
- Added exact 0451010.MRL 10 A Littelfuse as F1.
- Assigned J2: pins 1/2
BAT_RAW; pin 3PACK_NTC; pin 4PACK_ID; pins 5/6GND. - Added FS8205A dual N-MOSFET and wired the LTC4365 protection path.
- Added provisional LTC4365 divider: 162 kΩ / 137 kΩ / 1.11 MΩ, targeting approximately 3.0 V UV and 4.35 V OV; tolerance validation remains required.
- Completed major BQ25895 power connections: both BAT, SYS, SW and PGND pins; 1 µH charger inductor; 20 µF nominal
CHARGER_SYS_LOCAL; BAT, REGN, PMID and BTST capacitors; 260 Ω ILIM; 5.23 kΩ / 30.1 kΩ TS network toPACK_NTC;/CEpulled high through 10 kΩ onCHARGER_EN_N; DPDM, OTG and DSEL intentionally NC. - Added TPS259474 support on U2/U4/U7/U9: 665 Ω ILIM (approximately 5 A), 3.3 nF dV/dt, 2.2 nF ITIMER, and separate PG/status nets.
- Added TPS61288 support: Coilcraft XAL1060-222 2.2 µH 20 A-rated inductor; VIN bypass and bulk capacitance; VCC and BST capacitors; three 22 µF output capacitors; 73.2 kΩ / 10 kΩ feedback for approximately 5.0 V; provisional 36.5 kΩ compensation resistor.
- Confirmed major source topology remains separate and reverse-blocked:
VBUS_RAW → VBUS_PROTECTED → USB_5V → U4 → SYS_5VBAT_PROTECTED → U7 → BAT_BOOST_IN → U8 → BAT_5V → U9 → SYS_5VCHARGER_SYS_LOCALremains isolated fromSYS_5V.
- No PCB-layout changes were made.
Unresolved / blocking verification
- U3 TPS552882 remains substantially unwired. At the checkpoint, ERC reported at least 25 U3 floating pins. External buck-side MOSFET selection was unresolved because verified supported library parts were not available during the pass. Do not invent parts.
- U10 LMR33630 remains incomplete, with SW, BOOT, VCC, EN and PG floating.
- STUSB4500 reset, address, discharge, control and status wiring is incomplete.
- TPS259474 UV/OV and PGTH divider networks remain incomplete.
- TPS61288 compensation capacitors and hardware USB-present shutdown/recovery logic remain incomplete.
PACK_ID_ADCdivider remains incomplete.- PACK_NTC, fan, scanner-node and peripheral wiring remain incomplete.
- Generic-passive package and footprint assignments remain incomplete.
- Visual wire/symbol collisions remain.
ERC evidence at checkpoint
- U3-scoped review: 25 errors, primarily floating support and power-stage pins.
- U10-scoped review: 6 errors, including missing VCC power.
- Overall power scope does not satisfy production verification criteria.
- No ERC error may be waived without written engineering justification.
Mandatory resume order
When execution capacity is available, perform one focused schematic-completion pass in this order:
- Verify the USB, charger and battery source-selection topology with a power-state table. Confirm uninterrupted operation while charging, no back-feeding, and safe USB insertion/removal.
- Complete U3 TPS552882 using verified manufacturer reference circuitry and supported external MOSFETs. Do not invent parts.
- Complete U10 LMR33630 and all required support components.
- Finish STUSB4500 control, reset, discharge, status and PD circuitry.
- Finish all TPS259474 UV/OV/PGTH networks and verify reverse-current blocking.
- Finish TPS61288 compensation and USB-present shutdown/recovery control.
- Complete PACK_ID, PACK_NTC, fan, scanner-node and peripheral wiring.
- Assign verified packages and footprints to every component.
- Remove schematic collisions and clear every ERC error. Do not waive an error without written engineering justification.
Required completion report
At the end of the focused completion pass, provide only:
- Final ERC results
- Power-state table
- USB and battery power budgets
- Remaining measurements or owner decisions
- Confirmation whether the schematic is ready for independent review
Approval gate
Do not begin PCB layout or create manufacturing files until the owner approves the completed schematic.
Resume attempt checkpoint — TPS552882 power-stage progress
- Verified from the TI TPS25947 datasheet that TPS259474 has integrated back-to-back MOSFETs and blocks OUT-to-IN reverse current under all conditions; U4/U9 remain architecturally suitable for 5 V source ORing.
- Verified the TI TPS552882 9–20 V to 5 V / 5 A reference design: 4.7 µH inductor, 10 mΩ output sense, 400 kHz, 5.2 V gate drive, and external buck-side N-channel MOSFET requirements.
- Added real Flux-library-supported TI CSD17578Q5A MOSFETs Q2/Q3 (30 V, 25 A, 6.9 mΩ, 7.9 nC, TDSON-8) as the TPS552882 high-side and low-side buck FETs.
- Wired Q2/Q3 half bridge: Q2 drain to VBUS_PROTECTED; Q2 source/Q3 drain/U3 SW1 to U3_SW1; Q3 sources and U3 PGND/AGND to GND; gates to DR1H/DR1L.
- Wired existing TI-recommended Coilcraft XAL1010-472MED L1 (4.7 µH) between U3_SW1 and both U3 SW2 pins.
- Fresh exhaustive review after these mutations: 316 unresolved findings at 2026-07-23T21:09:47.931Z, down from 326. U3/L1/Q2/Q3 power-stage wiring resolved 20 floating-pin findings; remaining findings are still dominated by floating pins plus missing-power and schematic-legibility issues.
- No PCB/layout or manufacturing mutation was performed. Q2/Q3 remain unplaced on PCB intentionally because PCB work is forbidden.
Next exact action
Continue mandatory step 2 by completing the remaining TPS552882 TI reference network: 10 mΩ sense between ISP/ISN, 4×10 µF input, 4×22 µF output, 4.7 µF VCC, both 100 nF bootstrap capacitors, 49.9 kΩ FSW, 19.9 kΩ ILIM, 29.4 kΩ MODE, 100 kΩ CDC, 150 kΩ/6.19 kΩ FB divider, compensation network, EN/UVLO, PG pull-up/destination, DITH/SYNC state, and CC_N requirement. Then re-run U3-scoped ERC before proceeding to U10.
Purpose
Project status
Completion Pass 1 — completed
Unresolved / blocking verification
ERC evidence at checkpoint
Mandatory resume order
Required completion report
Approval gate
Resume attempt checkpoint — TPS552882 power-stage progress
Next exact action
