Automotive 30 V UPS PCB Design
Budget: £20 – £250 GBP
I need a PCB that will live in a vehicle and turn a 12 – 14.4 V battery feed into a stable 30 V rail, with enough stored energy to ride through engine cranking. The board must:
• Take 12 – 14.4 V DC in through a fused and switched line
• Cut the load when the input falls below a programmable 12 V threshold (behaviour similar to the XH-M609)
• Boost the line to a regulated 30 V DC
• Deliver 7 A at 30 V for at least 5 s while the starter motor drags the battery down, then automatically revert to pass-through operation
• Present the main output on a 5.5 mm × 2.1 mm barrel jack
Because the board sits in an automotive environment I expect attention to transient protection, reverse-polarity safeguards, thermal considerations, and vibration-resistant component choices; overall footprint is flexible, so you can optimise layout and thermal paths first.
Deliverables I need from you:
1. Complete schematic with part numbers and protective circuitry
2. PCB layout files (KiCad, Altium or Eagle preferred) and Gerbers ready for fabrication
3. Bill of materials with automotive-grade component suggestions
4. Brief design note explaining the UPS energy-storage choice (super-caps vs. lithium pack, sizing maths) and how the low-voltage cutoff is implemented
5. If a microcontroller is used, the firmware source and programming instructions
I’ll review the schematic before layout begins, and final payment will be released once the Gerbers, BOM, and documentation are handed over and pass a quick DRC/ERC check.
• Take 12 – 14.4 V DC in through a fused and switched line
• Cut the load when the input falls below a programmable 12 V threshold (behaviour similar to the XH-M609)
• Boost the line to a regulated 30 V DC
• Deliver 7 A at 30 V for at least 5 s while the starter motor drags the battery down, then automatically revert to pass-through operation
• Present the main output on a 5.5 mm × 2.1 mm barrel jack
Because the board sits in an automotive environment I expect attention to transient protection, reverse-polarity safeguards, thermal considerations, and vibration-resistant component choices; overall footprint is flexible, so you can optimise layout and thermal paths first.
Deliverables I need from you:
1. Complete schematic with part numbers and protective circuitry
2. PCB layout files (KiCad, Altium or Eagle preferred) and Gerbers ready for fabrication
3. Bill of materials with automotive-grade component suggestions
4. Brief design note explaining the UPS energy-storage choice (super-caps vs. lithium pack, sizing maths) and how the low-voltage cutoff is implemented
5. If a microcontroller is used, the firmware source and programming instructions
I’ll review the schematic before layout begins, and final payment will be released once the Gerbers, BOM, and documentation are handed over and pass a quick DRC/ERC check.