AOZ18101DI-04

Overview

The AOZ18101DI-04 is a 5A electronic fuse (eFuse) solution from Alpha & Omega Semiconductor, housed in a compact 3mm x 3mm DFN-10L package. It operates within an input voltage range of 3.5V to 14V, with a maximum absolute rating of 22V. The device integrates low RDS(ON) back-to-back MOSFETs providing a typical on-resistance of 20mΩ. Key electrical features include programmable overcurrent protection, under-voltage lockout, overvoltage protection, thermal shutdown, and programmable soft-start. Unlike variants -01 through -03, the DI-04 specifically disables True Reverse Current Blocking (TRCB) functionality.

Feature Summary

• Integrates high-performance IC with advanced Trench MOSFET technology for robust power switching.
• Provides comprehensive bus protection including overcurrent, overvoltage, undervoltage, and thermal safeguards.
• Features startup SOA management to support safe hot-insertion into 12V backplanes.
• Disables reverse current blocking to prevent unintended bus shutdown during high-inductive load events.

Applications

• Server and storage system main power bus protection
• Hard disk drive power circuits
• Server fan power distribution

Procurement Notes

Verify component authenticity through authorized channels due to potential counterfeit risks. Confirm package integrity upon receipt, as the DFN form factor requires careful handling. Check manufacturing date codes against project timelines, noting that supply chain availability may fluctuate. Ensure compatibility with existing PCB footprints and thermal design requirements before finalizing procurement orders.

Selection Notes

Select the AOZ18101DI-04 when reverse current flow must be permitted without triggering a shutdown, such as with inductive loads like fans or drives. Choose this variant over DI-01/02 if TRCB is unnecessary, or over DI-03/04 if TRCB is required. Ensure the application input voltage remains within the 3.5V to 14V operational window. Verify that the 5A current rating meets the specific load requirements of the target circuit design.

Part Context

This component belongs to the AOZ18101DI series, representing AOS's first eFuse solution designed for server applications. It combines multi-chip packaging technology with TrenchFET MOSFETs to replace traditional discrete FET and controller combinations. The series aims to provide a more compact and reliable alternative for protecting main power buses in high-reliability systems against fault conditions.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official manufacturer resources for cross-reference data or equivalent product recommendations.