BQ25185 Charger Topology

flux

Placement and board sizing are complete, but routing was rolled back because the generated copper overlapped, and the requested four-layer stackup did not persist. I’m independently verifying the saved state and will attempt one focused stackup correction before finalizing.

flux

Se guardaron cambios reales:
  • PCB redimensionada de 160×100 mm a 80×100 mm, esquinas de 2 mm.
  • Stackup corregido y verificado a 4 capas.
  • Los 70 footprints fueron reubicados por dominios, sin solapes de cuerpos ni componentes fuera del contorno.
  • Se conservaron todos los bloqueos y aislamientos BENCH_ONLY; no se inventaron conexiones Remote 14, RF, LM5069 ni de máquina.
  • Los intentos de routing se retiraron al generar solapes de cobre; la PCB queda sin trazas guardadas.
Verificación:

Table

RevisiónAntesAhora
DRC192176
Airwires192172
ERC8–9 conocidos9
Solapes de cuerpos—0
Fuera del board—0
Bloqueos exactos:
  • Footprint exacto de J1 DX07S016JA3R1500.
  • Footprint exacto de L1 MSS1246T-683MLB.
  • Footprint de U8 con cuatro solapes internos entre pads de distintas nets.
  • Reglas de neck-down necesarias para pads finos antes de enrutar.
  • LM5069 UVLO/OVLO/TIMER/PWR, RF, Remote 14 físico y funciones de máquina todavía no autorizadas eléctricamente.
  • R9 y capacitores pendientes de calificación.
No pude continuar la corrección/ruta porque se agotaron los ACUs. BENCH_ONLY / NOT FOR FABRICATION / NOT FOR ENERGIZATION.
Calificar footprints
Revisar ERC
Reglas neck-down
Documentar BENCH_ONLY
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Schematic

Layout

Preview

Phase 10 — Safe Closure of Pending Passive MPNs
State: BENCH_ONLY / NOT FOR FABRICATION / NOT FOR ENERGIZATION
Scope: Passive sourcing metadata only. No values, symbols, footprints, nets, PCB, placement, routing, copper, vias, rules, or known ERC dispositions were changed.
Result
Manufacturer Part Number review initially improved from 21 missing MPN findings to 11. A later authorized C18 correction reduced the current count to 10.
APPROVED_FOR_SCHEMATIC

Table

RefFunction validatedExact MPNManufacturerLCSCPackage / rating basis
R14TPS63030 feedback top, AIRTAG_3V0 to AIRTAG_FBRC0603FR-071MLYAGEOC1055781 MΩ ±1%, 0603, 0.1 W, 75 V
R15TPS63030 feedback bottom, AIRTAG_FB to AIRTAG_PACK_NEGRC0603FR-07200KLYAGEOC105574200 kΩ ±1%, 0603, 0.1 W, 75 V
R16CC1354 RESET_N external pull-up to RX_3V3; TI states RESET_N has no internal pull-upRC0402FR-0710KLYAGEOC6049010 kΩ ±1%, 0402, 0.063 W
C1CP2102N VDD local decouplingCL10B104KB8NNNCSamsung Electro-MechanicsC1591100 nF ±10%, X7R, 50 V, 0603
C3BQ25185 ISET filterCC0603JRNPO9BN470YAGEOC10562247 pF ±5%, C0G/NP0, 50 V, 0603
C7BQ29700 cell/BAT local decouplingCL10B104KB8NNNCSamsung Electro-MechanicsC1591100 nF ±10%, X7R, 50 V, 0603
C11LM5164 bootstrap capacitorCC0603KRX7R9BB222YAGEOC1070822.2 nF ±10%, X7R, 50 V, 0603
C16CC1354 VDDS local decouplingCC0402KRX7R7BB104YAGEOC60474100 nF ±10%, X7R, 16 V, 0402
C17CC1354 VDDS2 local decouplingCC0402KRX7R7BB104YAGEOC60474100 nF ±10%, X7R, 16 V, 0402
C19MCP41HV51 VL local decouplingCL10B104KB8NNNCSamsung Electro-MechanicsC1591100 nF ±10%, X7R, 50 V, 0603
PENDING_APPROVAL

Table

RefReason approval is withheld
C2CP2102N 4.7 µF requirement lacks demonstrated guaranteed effective capacitance at 3.3 V after tolerance, temperature, DC bias, and aging.
C4BQ25185 IN capacitor requires official minimum/effective-capacitance closure at the actual input voltage.
C6BQ25185 BAT capacitor requires official minimum/effective-capacitance closure at maximum cell voltage.
C8TPS7A2033 input capacitor requires effective-capacitance validation at RX_5V.
C9TPS7A2033 output capacitor requires effective capacitance and stability/ESR validation at 3.3 V.
C13TPS63030 input capacitor lacks accessible official numeric DC-bias retention at maximum cell voltage.
C14TPS63030 output capacitor lacks accessible official numeric retention at 3.0 V plus aging.
C15CC1354 VDDS bulk capacitor lacks closed effective-capacitance requirement and DC-bias proof.
C20Existing GRM21BZ71A226ME15L / C907991 metadata is retained, but procurement approval remains pending effective-capacitance/DC-bias/aging closure for VDDR.
Later authorized correction — C18

Table

RefPreviousCorrected selectionVerification
C18100 nF, 0402, no MPN1 µF ±10%, X7R, 10 V, 0402; YAGEO CC0402KRX7R6BB105; LCSC C7500381TI CC1354P10 requires 1 µF ±10%, X7R, minimum 6.3 V from DCOUPL to ground. C18.1 remains on CC1354_DCOUPL with U9 DCOUPL; C18.2 remains on DGND_SERVICE. Existing 0402 footprint retained.
BLOCKED_BY_UPSTREAM_DECISION

Table

RefBlocking decision
R9LM5069 VIN maximum, transients, inrush, fault duration, TIMER and pulse-energy profile remain undefined.
C10LM5069/LM5164 input voltage and transient envelope remain undefined; effective capacitance at actual VIN cannot be approved.
Verification
  • MPN review before: 21 findings.
  • MPN review after the authorized C18 correction: 10 findings.
  • Remaining missing-MPN designators: R9, C2, C4, C6, C8, C9, C10, C13, C14, C15.
  • C20 is not a missing-MPN finding because it already carries GRM21BZ71A226ME15L / C907991, but remains PENDING_APPROVAL.
  • No known ERC finding was modified or suppressed.
Official evidence used
  • TI CC1354P10 datasheet: RESET_N has no internal pull-up; DCOUPL requires 1 µF ±10%, X7R, 6.3 V to ground.
  • Official YAGEO part-specific spec sheets for RC0402/RC0603 resistors and CC0402/CC0603 capacitors.
  • Official Samsung Electro-Mechanics product data for CL10B104KB8NNNC.
  • LCSC product listings used only to establish exact LCSC identifiers and reported availability; availability must be rechecked at procurement time.

  • Result

  • APPROVED_FOR_SCHEMATIC

  • PENDING_APPROVAL

  • Later authorized correction — C18

  • BLOCKED_BY_UPSTREAM_DECISION

  • Verification

  • Official evidence used