IR4301MTRPBF

Overview

The IR4301MTRPBF is a fully integrated analog input Class D audio amplifier manufactured by Infineon Technologies. It combines a PWM controller and digital audio MOSFETs within a compact 5x6 mm PQFN-22 package. The device delivers a typical output power of 160 W into a 4 Ω load at THD+N=10%. It supports split or single power supply configurations with differential or single-ended inputs. Key electrical parameters include a residual noise level of 250 μVrms (AES-17, IHF-A) and a total harmonic distortion plus noise of 0.02% (1 kHz, 1 W, 4 Ω).

Feature Summary

• Integrates PWM controller and optimized digital audio MOSFETs to eliminate the need for mechanical heatsinks during typical music playback.
• Features over-current, over-temperature, and under-voltage protections equipped with an automatic self-reset function.
• Incorporates start and stop click noise reduction mechanisms alongside high noise immunity for reliable operation.
• Supports flexible input topologies including both differential and single-ended connections.

Applications

• Home theatre systems
• Docking station audio systems
• PC audio systems
• Musical instruments
• Karaoke amplifiers

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm datasheet revisions match the specific manufacturing lot. Ensure proper ESD handling protocols are followed due to the sensitivity of the CMOS control circuitry. Validate that the PCB layout adheres strictly to the recommended board mounting guidelines provided in application notes to maintain thermal performance and signal integrity.

Selection Notes

Select this component when high peak music power output is required without external cooling solutions. It is suitable for designs needing robust protection features against fault conditions. Consider the PQFN-22 package constraints regarding thermal dissipation on the PCB. Verify that the system's power supply voltage range aligns with the device's absolute maximum ratings for VP and VB pins.

Part Context

This part belongs to the IR43x1 family of integrated Class D audio amplifiers from Infineon Technologies. The family includes variants such as the IR4321 and IR4311, which offer different power outputs and voltage ratings while sharing similar packaging and functional architectures. These devices represent a consolidation of control logic and power stages to simplify audio amplifier design.

Replacement Considerations

IR4321MTRPBF

FAQ

Does the IR4301MTRPBF require a mechanical heatsink?

No, the device operates without a mechanical heatsink attached during typical music playback usage due to its fully optimized co-packed MOSFETs and controller IC.

What is the switching frequency of the amplifier?

The switching frequency is fixed at 500 kHz.