AO4850

Overview

The AO4850 is a dual N-channel enhancement mode field effect transistor manufactured by Alpha & Omega Semiconductor Inc. It is housed in an 8-SOIC surface-mount package designed for general-purpose switching applications. The device features a drain-source voltage rating of 75V and a continuous drain current of 2.3A at 25°C. Key electrical characteristics include a maximum gate threshold voltage of 3V at 250µA, a maximum gate charge of 7nC at 10V, and a maximum input capacitance of 380pF at 30V. The component supports a junction temperature range from -55°C to 150°C.

Feature Summary

• Dual N-channel configuration integrated into a single compact surface-mount package
• Logic-level gate operation enabling direct drive from standard logic interfaces
• High voltage tolerance suitable for diverse switching environments

Applications

• General-purpose power switching circuits
• Low-side load switching applications
• Battery protection modules

Procurement Notes

Verify the specific suffix of the part number to confirm packaging type and lead status. Confirm RoHS compliance and moisture sensitivity level requirements against project specifications. Check for obsolescence notices or last-time buy notifications before finalizing procurement plans.

Selection Notes

Select this component when a dual N-channel MOSFET with 75V capability and low gate charge is required. Ensure the thermal management design accommodates the 1.1W power dissipation limit in the 8-SOIC package. Verify that the 3V gate threshold meets the driving logic voltage levels of the target application.

Part Context

This component belongs to the AO485 series of dual MOSFETs from Alpha & Omega Semiconductor. The series focuses on providing integrated dual-channel solutions in small outline packages to save board space. The AO4850 specifically offers higher voltage ratings compared to lower-voltage variants within the same family.

Replacement Considerations

Direct replacements must match the 75V Vdss, 2.3A Id, and 8-SOIC package constraints. Verify pin compatibility and electrical parameters such as Rds(on) and Qg to ensure circuit performance remains unchanged.