01
AEC-Q BOM filter
Every active and passive part screened for AEC-Q100/Q101/Q200 grade and temperature class before placement — no late-stage substitutions that void qualification.
Boards that survive the under-hood.
Automotive electronics fail thermally, vibrationally and electromagnetically — usually all three. We design PCBs to AEC-Q-qualified parts, IATF 16949-aware processes and CISPR 25 EMC limits, with thermal sign-off backed by TRM.
−40 to +125 °Cgrade-1 ambient envelope
ASIL A–Dfunctional-safety partitioning
AEC-Q100/200qualified BOM filter
48 Vmild-hybrid rails routinely
The deliverables.
02
ISO 26262 partitioning
Safety-relevant nets, redundancies and diagnostics laid out for ASIL A–D requirements with independence between channels and diagnostic-friendly placement.
03
LV124 / CISPR 25 layout
Reverse-battery, load-dump and transient survival in the protection stage; CISPR 25 emissions controlled at the IC pin, not by a heroic downstream filter.
04
TRM thermal sign-off
Steady-state and transient (cold-crank, fault) thermal simulation — the report goes in your validation pack, not just a screenshot.
Built for this sector.
Standards we design to
- IATF 16949 (QMS-aware design)
- AEC-Q100 / Q101 / Q200 (component qual)
- ISO 26262 (functional safety)
- ISO 7637 / LV124 / LV148 (transients)
- CISPR 25 (EMC emissions)
Powertrain + body
- 12 V / 24 V / 48 V architectures
- GaN/SiC traction and DC/DC
- BLDC and PMSM motor drives
- BMS + cell balancing
- Body controllers and ADAS sensor PCBs
Reliability practices
- Conformal coat / underfill clearance
- Vibration-aware part orientation
- Thermal-cycling derating
- Filled-and-capped vias for Class 3
- PTH reliability and pad design
A 48 V mild-hybrid DC/DC, validated to LV124 cold-crank.
The brief
A 5 kW 48 V→12 V converter for a mild-hybrid had to hold up through LV124 cold-crank transients and pass CISPR 25 Class 5 conducted emissions.
What we did
- Re-stacked to 3 oz heavy copper plus bus-bar attach; widened the high-side gate loop so the measured loop inductance came in under 4 nH.
- Re-tuned the input filter topology against a TRM-correlated thermal model — same parts, ~half the dissipation in the input chokes.
- Filtered the output node at the IC pin (not 30 mm downstream); CISPR 25 conducted emissions dropped by 14 dB.
Outcome
Survived 5,000 LV124 cold-crank cycles in qualification; CISPR 25 Class 5 conducted passed on A-sample with a fully AEC-Q BOM.
Common questions.
Are you AEC-Q certified?
AEC-Q is a part-level qualification — not a design-house certification. We design WITH AEC-Q-qualified components and to the layout rules those parts assume, so your qualified BOM ships qualified.
Can you take an ISO 26262 ASIL-D design?
We support ASIL A–D layouts: independence between redundant channels, diagnostic coverage, hardware-error-model-friendly placement. Tool-confidence and process audits remain on your side per ISO 26262 part 8.
Do you do EV traction inverter PCBs?
Yes — high-current bus-bar attach, GaN/SiC gate-loop layout, isolation barriers, and TRM-backed thermal sign-off. Correlation is typically ±3 °C bench-to-sim.
Take the under-hood seriously.
AEC-Q parts, CISPR 25 layout, TRM thermal sign-off. Fixed-fee band in 60 seconds.