IR’s Compact PowIRaudio Modules Reduce Component Count, Shrink PCB Size up to 70 Percent and Simplify Class D Amplifier Design

EL SEGUNDO, Calif. - International Rectifier, IR® (NYSE: IRF), a world leader in power management technology, today introduced the PowIraudio™ family of integrated power modules for high performance home theater systems and car audio amplifiers. The new devices integrate a PWM controller and two digital audio power MOSFETs in a single package to offer a highly efficient, compact solution that reduces component count, shrinks PCB size up to 70 percent and simplifies Class D amplifier design.

The combination of an advanced audio controller IC with MOSFETs fully optimized for audio performance results in improved efficiency, THD, and EMI, allowing the IR43xxM family operate without a mechanical heatsink over a wide power supply range on either a single or split power supply. High voltage ratings and noise immunity ensure reliable operation over various environmental conditions.

“IR’s existing Class D solutions are proven to offer equivalent audio performance to Class AB amplifiers while providing the additional benefits of higher efficiency and smaller size,” said Jun Honda, Director of Audio Systems Engineering, IR’s Energy Saving Products Business Unit. “The high level of integration of our new PowIRaudio modules enables customers to quickly and easily design their high performance Class D Audio systems”

The single channel IR4301M and dual channel IR4302M offer the flexibility and convenience of building stereo amplifier and multi-channel designs in various channel configurations, while the devices’ 5x6 mm and 7x7 mm PQFN packages enhance the benefit of utilizing a smaller size of Class D topology.

Other key features common to the family include over-current protection, thermal shutdown, internal/external shutdown and floating differential input. The IR4302M also offers clip detection.

A wide range of reference designs are available to further simplify the design of systems using these devices.

Module Specifications

Part Number No. of channels Power Supply Voltage Peak Output Power
(RMS per CH)
IR4301MPbF 1 80V or +/-40V 130W PQFN 5x6mm
IR4302MPbF 2 80V or+/-40V 70W PQFN 7x7mm

Reference designs

Reference Design Featured Part Descriptions Output Power
IRAUDAMP12 IR4301M IR4301 split power supply 130W*2ch 4Ohms load/no heatsink
IRAUDAMP16 IR4302M IR4302 split power supply 70W*2ch 4Ohms load/no heatsink
IRAUDAMP17 IR4302M IR4302 single power supply 100W*2ch 4Ohms load/with heatsink
IRAUDAMP19 IR4301M IR4301 single power supply 130W*2ch 4Ohms load/with heatsink
IRAUDPS3 IRS27952S Audio AC/DC power supply 120W +/-30V

Datasheets and an application note are available via the part number links found above.

Availability and Pricing

Pricing for the IR43xx begins at US $2.00 in 10,000-unit quantities. Pricing is subject to change without notice. Production orders are available immediately. The new devices are MSL2 industrial-qualified and RoHS compliant.