IR4311MTRPBF

Overview

The IR4311MTRPBF is a single-channel Class-D audio amplifier IC manufactured by Infineon Technologies (formerly International Rectifier). It integrates a PWM controller and digital audio MOSFETs to deliver high peak music power output. The device operates with a maximum dual supply voltage of ±7.5V, providing up to 45W of mono output power into a 4-ohm load. Key electrical specifications include a maximum input bias current of 0.04µA at 12V and a typical quiescent current of 3mA at 12V. It is housed in a 22-pin PowerVQFN package.

Feature Summary

• Integrates PWM controller and digital audio MOSFETs for high-performance Class-D amplification
• Optimized MOSFET design for high efficiency and low distortion
• Supports dual supply operation for flexible system integration

Applications

• High-fidelity audio systems requiring high peak music power output
• Mono channel audio amplifier designs
• Portable or compact audio equipment utilizing the 22-pin PQFN package

Procurement Notes

Verify the manufacturer designation as Infineon Technologies AG, noting the legacy International Rectifier branding. Confirm the package type is 22-Pin PQFN (PowerVQFN) and the tape-and-reel configuration matches project requirements. Ensure the component meets RoHS compliance standards as indicated in official documentation.

Selection Notes

Select this component for applications demanding high power output in a compact form factor. The integrated nature of the PWM controller and MOSFETs simplifies the design process compared to discrete solutions. Consider the ±7.5V supply limit when designing the power stage. The 22-pin package requires appropriate thermal management considerations for sustained high-power operation.

Part Context

This part belongs to the IR43x1 series of Class-D audio amplifiers. These devices are designed to combine control logic and power stages on a single die, reducing board space and component count. The series targets high-efficiency audio applications where size and performance are critical constraints.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult official Infineon documentation for cross-reference information.