Alpha and Omega Semiconductor Limited (AOS) has released its AOZ17517QI series 60-A eFuse for 12-V power rails in servers, data centers, and telecom infrastructure. The current-limiting protection eFuse monitors and protects critical power rails in data centers and telecom infrastructure to protect the main power bus from interruption due to abnormal load under fault conditions.
“The eFuse continuously monitors the current flowing through the power switch,” AOS said. “If the current exceeds the set limit, the switch will limit the current to the maximum allowed. If the high current load persists, the switch will eventually turn off, protecting downstream loads from damage, thus acting as a fuse.”
(Source: Alpha and Omega Semiconductor Ltd.)
The new eFuse leverages AOS’ advanced co-packaging technology that combines a high-performance IC with protection features and the company’s latest high safe operating area (SOA) Trench MOSFET. The AOZ17517QI series’ MOSFET offers low 0.65-mohm on-resistance that isolates the load from the input bus when the eFuse is off. Other key specs include an operating voltage range of 4.5 V to 20 V and a 27-V absolute maximum rating.
These devices are designed to integrate accurate analog current and voltage monitoring signals. In addition, multiple eFuses can be used in a parallel for higher-current applications. Multiple devices can operate concurrently and distribute the current during the startup phase.
Other features include programmable soft-start, startup SOA management along with other protection circuitry including programmable overcurrent protection, short circuit protection, under-voltage lock-out, over-voltage clamp, and thermal shutdown protection, which enable glitch-free system power-up and the ability to hot plug into the backplane, the company said.
The AOZ17517QI-01 (auto-restart) and AOZ17517QI-02 (latch-off) eFuses are housed in a 5 × 5-mm QFN-32L package. The series is available now in production quantities with a lead time of 14 weeks. The unit price for AOZ17517QI starts at $1.8 in quantities of 1,000. These devices are RoHS compliant.
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