eFuse limits current on server input rails

A 60-A eFuse from Alpha & Omega, the AOZ17517QI, is optimized for 12-V input power rails in servers, data centers, and telecom infrastructure. Operating from 4.5 V to 20 V (27 V absolute maximum), it safeguards the main input bus from interruptions caused by abnormal loads or fault conditions.

The eFuse co-packages a high-performance IC with protection features and a high-SOA trench MOSFET, which serves as the device’s controllable power switch. It continuously monitors current through the MOSFET, limiting it if it exceeds the set threshold. If the overcurrent persists, the switch turns off, safeguarding downstream devices much like a conventional fuse.

MOSFET on-resistance of 0.65 mΩ isolates the load from the input bus when the eFuse is off. Built-in startup SOA management and additional protections enable glitch-free system power-up and safe hot-plug operation.

The AOZ17517QI offers auto-restart or latch-off options. Prices start at $1.80 each in 1,000‑unit quantities. It is available now in production quantities, with a lead time of 14 weeks.

AOZ17517QI product page

Alpha & Omega Semiconductor 

The post eFuse limits current on server input rails appeared first on EDN.