SD-03 · Chapter 12 · System Design (Open-Ended)
Powering a remote FPGA card over a harness
An FPGA card sits at the end of a 30 cm harness from the main board. Its 1.0 V core draws 3 A with 2 A load steps when the logic wakes up, and it's browning out. What do you do?
| Level | ●●● onsite design / senior |
| Track | Senior system |
| Really testing | Load profile, local vs remote regulation, remote-sense stability. |
Full worked answer: in the book, page 288 — what to say first, how to explain it, the numbers worth quoting and the follow-ups. About the book →
Going deeper
Extra explanation that is not in the book: worked numbers, where people go wrong, and how to say it in the room.
Going deeper for this question is coming.
Errata
No corrections known for this question. All errata
Ask about this question
Stuck on a step, or think something is wrong? Send it with SD-03 in the subject. Good questions get answered on this page, and corrections go into the next printing.
Related
← SD-02 Multirail power telemetrySD-04 Smart pet-collar tag →