Automotive Dual Motor Controller PCB - KiCad, CAN FD & LIN

About the project

I am looking for an experienced automotive electronics and PCB design engineer to create a complete prototype PCB for controlling two independent brushed DC motors in a 12 V automotive environment. This project covers hardware design only. No firmware, bootloader, desktop GUI, mobile application, or enclosure design is required. MAIN REQUIREMENTS - Two independent reversible brushed DC motors - One full H-bridge per motor with four external N-channel MOSFETs; eight bridge MOSFETs total - 10 A target continuous current per motor after thermal validation - 20 A for up to 1 second and 30 A start/stall peak for up to 100 ms - Independent 20 kHz PWM, forward, reverse, coast, and active brake - Independent bidirectional current measurement and fast hardware overcurrent shutdown - CAN FD with Classic CAN compatibility and LIN 2.x - USB-C service interface - Three protected analog inputs for buttons connected to GND - Two optional Hall-sensor inputs with protected 5 V supply - Battery-voltage measurement and two power-stage temperature sensors - Reverse-battery and automotive transient protection - Low-power sleep and wake hardware FIXED MAIN COMPONENTS - STM32G0B1CBT6 MCU - Infineon TLE9562-3QXJ automotive motor SBC - 8 x IAUC120N04S6N013 automotive MOSFETs - 2 x INA240A2-Q1 current-sense amplifiers - 2 x 0.5 mOhm Kelvin current shunts - TLV3202-Q1 hardware window comparators - Aptiv HCCPHPE24BKA90F sealed 24-position right-angle connector - USB-C service connector The main Aptiv connector and its fixed pinout must not be changed. PCB REQUIREMENTS - Native KiCad project - Four-layer FR-4, 1.6 mm - 2 oz outer copper and minimum 1 oz inner copper - Desired PCB size 65 x 50 mm or smaller; hard maximum 70 x 50 mm - Correct high-current and thermal design - Kelvin routing for both current shunts - Short MOSFET gate-drive loops - Proper separation of power, analog, CAN/LIN, and USB circuits - Zero unresolved ERC/DRC errors and zero unrouted nets REQUIRED DELIVERABLES - Complete editable KiCad schematic and fully routed PCB - Project-specific symbols, footprints, and 3D models - Schematic PDF and complete BOM with exact MPNs and alternatives - Gerber X2, drill, pick-and-place, assembly and fabrication drawings - Populated PCB STEP model - MCU pin-allocation table - Connector and harness pinout drawings - Current, power-loss, TVS, gate-drive, and thermal calculations - ERC/DRC reports - Hardware bring-up and prototype test procedure - Final release ZIP ready for prototype manufacturing A detailed 16-page hardware specification is attached. IDEAL FREELANCER Please provide examples of similar automotive, motor-control, or high-current PCB projects. Explain your experience with currents above 10 A, MOSFET H-bridges, CAN/LIN, current sensing, automotive protection, and KiCad. Please confirm that you will deliver the complete editable KiCad source project, not only Gerbers or PDF files. The PCB is Prototype A0. Automotive, EMC, thermal, vibration, and 30 A performance must not be described as physically validated until prototype testing is completed. Expected delivery: 4 to 6 weeks.

Skills required