How to Use GMSL Line-Fault Detection for Power Over Coax

By: Oliver Jakobi and Craig Sakamoto

Abstract: Many of Maxim GMSL SerDes parts have built-in line-fault detection circuits for a short to ground, short to the battery, and a disconnected cable. When power over coax (PoC) is used, a different configuration is required for proper line-fault operation. This application note explains the line-fault circuitry, how to adapt it for PoC, and a solution to protect against overvoltage and overcurrent conditions.