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Product Detailed Parameters
- Description：IC AMP CLASS D MONO 90W 22QFN
- Series：-
- Mfr：Infineon Technologies
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Class D
- Output Type：1-Channel (Mono)
- Max Output Power x Channels @ Load：90W x 1 @ 4Ohm
- Voltage - Supply：-
- Features：Depop, Differential Inputs
- Mounting Type：Surface Mount
- Supplier Device Package：22-QFN (3x4)
- Package / Case：22-PowerVQFN
- Operating Temperature：-40°C ~ 100°C (TA)
- Grade：-
- Qualification：-
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Overview
The IR4321MTRPBF is a fully integrated analog input Class D audio amplifier manufactured by Infineon Technologies. It combines a PWM controller with digital audio MOSFETs in a compact 5x6 mm PQFN-22 package. The device delivers 90 W output power into a 4 Ω load and 135 W into a 2 Ω load at THD+N=10%. It supports split or single power supplies, differential or single-ended inputs, and includes over-current, over-temperature, and under-voltage protections with self-reset functionality.
Feature Summary
- Integrates PWM controller and digital audio MOSFETs for high performance without requiring mechanical heatsinks during typical music playback.
- Features start and stop click noise reduction mechanisms to enhance user experience during power transitions.
- Provides robust protection against over-current, over-temperature, and under-voltage conditions with automatic self-reset capabilities.
Applications
- Home theatre systems
- Docking station audio systems
- PC audio systems
- Musical instruments
- Karaoke amplifiers
Procurement Notes
Verify the specific ordering suffix 'MTRPBF' corresponds to the tape and reel packaging format containing 4000 units per standard pack. Confirm that the component meets RoHS compliance requirements as stated in the datasheet. Ensure the design accommodates the Industrial qualification level and MSL2 moisture sensitivity rating specified for this package type.
Selection Notes
Select the IR4321MTRPBF when an output power of 90 W into 4 Ω or 135 W into 2 Ω is required. This model is suitable for applications needing a small form factor due to its 5x6 mm PQFN package. Consider this part if the design requires integrated thermal protection and does not mandate external heatsinking for standard usage scenarios.
Part Context
This component belongs to the IR43x1 family of integrated Class D audio amplifiers from Infineon Technologies (formerly International Rectifier). The family includes variants like the IR4301 and IR4311, differentiated primarily by their voltage ratings and maximum output power capabilities while sharing the same core architecture and package style.
Replacement Considerations
Direct substitutes within the same family include the IR4301MTRPBF for higher voltage/power applications and the IR4311MTRPBF for lower power requirements. Verify pin compatibility and electrical specifications before swapping between these models.
FAQ
Does the IR4321MTRPBF require a mechanical heatsink?
No, the device operates without a mechanical heatsink attached during typical music playback usage due to optimized MOSFET co-packaging.
What is the switching frequency of the IR4321MTRPBF?
The switching frequency is typically 500 kHz.
