FAN7040MX

Overview

The FAN7040MX is a Class AB audio power amplifier manufactured by onsemi, formerly Fairchild Semiconductor. It operates as a single-channel (mono) device housed in a 20-SOIC surface-mount package. The component supports a supply voltage range of 4.5V to 18V and delivers a maximum output power of 3.5W into a 16-ohm load. It functions within an ambient temperature range of -40°C to 85°C.

Feature Summary

• Integrates pop-and-click suppression circuitry to minimize audible noise during power-up and power-down transitions.
• Includes built-in thermal protection and short-circuit protection mechanisms to safeguard the device under fault conditions.
• Features an integrated volume control function for direct signal attenuation without external components.

Applications

• Portable audio equipment requiring mono amplification
• Consumer electronics with limited board space
• Battery-powered audio devices

Procurement Notes

Verify the manufacturer designation carefully, as the part was originally produced by Fairchild Semiconductor and is now managed by onsemi following corporate restructuring. Confirm the specific suffix or ordering code variant matches your design requirements, as availability may vary between distributors due to the component's discontinued status.

Selection Notes

Select this component for applications requiring a simple, low-pin-count mono audio solution with integrated protection features. Ensure the system design accommodates the 20-SOIC footprint and that the thermal environment remains within the specified -40°C to 85°C operating range for reliable performance.

Part Context

This component belongs to the FAN7040 series of audio amplifiers. It represents a legacy product line from Fairchild Semiconductor, now maintained under the onsemi portfolio. The device is designed for cost-sensitive audio applications where integrated protection and minimal external component count are prioritized over high-fidelity multi-channel capabilities.