IR4312MTRPBF

Overview

The IR4312MTRPBF is a two-channel integrated analog input Class-D audio amplifier housed in a 7x7 mm PQFN44 package. It delivers 35 W per channel into a 4 Ω load and 40 W into a 3 Ω load at typical THD+N of 10%. The device supports split or single power supplies, with maximum positive supply voltages up to 32 V without heatsink and 40 V absolute maximum. Key electrical parameters include a typical residual noise of 250 μVrms and a THD+N of 0.02% at 1 kHz, 1 W, and 4 Ω.

Feature Summary

• Integrates two-channel PWM controller and digital audio MOSFETs for high performance
• Operates without mechanical heatsink in typical music playback usage
• Features over-current, over-temperature, and under-voltage protections with self-reset
• Includes start/stop click noise reduction and clip/fault reporting outputs

Applications

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

Procurement Notes

Verify the complete part number against official Infineon documentation to ensure correct suffix matching. Confirm that the PQFN44 package dimensions align with your PCB footprint requirements. Check for specific environmental compliance certifications if required by your manufacturing standards. Ensure proper handling procedures are followed due to moisture sensitivity level ratings.

Selection Notes

Select this component when designing stereo audio applications requiring high efficiency and compact size. Consider the 32 V supply limit for system voltage planning. Evaluate thermal management needs based on expected output power and ambient conditions. Verify compatibility with single-ended or differential input signal sources.

Part Context

This device belongs to the IR43x2 family of integrated Class-D audio amplifiers from Infineon Technologies (formerly International Rectifier). The series includes variants like IR4302 and IR4322 with different power ratings and voltage capabilities. All members share the same small form factor and integration approach.

Replacement Considerations

IR4302MTRPBF offers higher power output but requires careful thermal design. IR4322MTRPBF provides intermediate power levels. Direct pin-compatible replacements within the same family should be evaluated for voltage and current rating differences.