AO4840L

Overview

The AO4840L is a dual N-channel enhancement mode field effect transistor manufactured by Alpha & Omega Semiconductor Inc. It utilizes advanced trench technology to achieve low gate charge and excellent on-resistance characteristics. The device features a drain-source voltage of 40V and a continuous drain current of 6A at 25°C. Key electrical parameters include a maximum gate threshold voltage of 3V at 250µA, a maximum gate charge of 10.8nC at 10V, and an input capacitance of 650pF at 20V. The component operates within a junction temperature range of -55°C to 150°C and is housed in an 8-SOIC surface-mount package.

Feature Summary

• Dual N-channel configuration utilizing advanced trench MOSFET technology for optimized performance
• Logic level gate capability suitable for direct drive from standard logic interfaces
• Electrically identical to the AO4840 variant while offering specific environmental compliance options

Applications

• Load switching applications requiring efficient power control
• Pulse Width Modulation (PWM) circuits for motor or light control
• DC-DC converter output stages in portable electronic devices

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest datasheet to confirm environmental compliance status. Ensure that the selected variant matches the required packaging format for automated assembly processes. Cross-reference the part number with official distributor catalogs to confirm current production status and availability constraints before finalizing procurement plans.

Selection Notes

Select this component when a dual N-channel MOSFET with 40V rating and 6A current capacity is required in an 8-SOIC package. Consider the AO4840L specifically if lead-free and RoHS-compliant materials are mandatory for the target application. Evaluate the gate charge and on-resistance specifications to ensure compatibility with the driving circuit's power budget and switching frequency requirements.

Part Context

The AO4840L belongs to the AlphaMOS series of power management solutions from Alpha & Omega Semiconductor Inc. This series focuses on providing high-efficiency discrete semiconductors for consumer electronics and industrial systems. The AO4840L serves as the environmentally compliant version of the standard AO4840, sharing identical electrical characteristics while meeting specific regulatory standards for restricted substances.

Replacement Considerations

The AO4840 is electrically identical to the AO4840L and may be used as a functional substitute if environmental compliance differences are not critical. Other dual N-channel MOSFETs in the 8-SOIC package with similar voltage and current ratings should be evaluated for pinout compatibility and thermal performance before substitution.