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International Rectifier : Class D audio amplifier is scalable from 25 to 500 W



International Rectifier has introduced the IRAUDAMP7 reference design for Class D audio amplifiers above 25W per channel including home theatre applications, musical instruments and car entertainment. With a power range from 25W to 500W, the IRAUDAMP7 offers a high degree of scalability on a single layer PCB.

The IRAUDAMP7S two-channel, 120W half-bridge design provides 91 percent efficiency at 120W in Class D stage, eight ohms, and a THD+N of 0.005 percent at 1 kHz, 60W, eight ohms, (both typical). The IRAUDAMP7D features IR’s IRS2092 protected digital audio driver IC in a DIP16 package together with through-hole components while the IRAUDAMP7S features the IRS2092S in an SOIC package with surface-mount components. Both reference designs are paired with the IRFI4019H-117P digital audio dual MOSFET to further enhance scalability, and are wave solder process compatible.

The IRAUDAMP7 provides designers with quick and easy scalability. For example, a 125W design can be functionally scaled to 60W within minutes simply by changing seven of the 50 components required on a single layer board.

The IRAUDAMP7 incorporates critical protection features including over-current protection, over-voltage protection, under-voltage protection, DC-protection, and over-temperature protection. Housekeeping functions include a +/- 5V supply for analog signal processing for the preamplifier and a +12V supply (Vcc) referenced to -B for the Class D gate driver stage.

Specifications

Reference Design Item IRAUDAMP7D IRAUDAMP7S
Driver IC IRS2092 IRS2092S
Power MOSFET IRFI4019H-117P IRFI4019H-117P
Rated Output Power Half Bridge, 8 _ 125W x 2 125W x 2
Half Bridge, 4 _ 250W x 2 250W x 2
Full Bridge, 8 _ 500W x 1 500W x 1
Nominal Supply Voltage +B, -B ±50V ±50V

Datasheets and application notes are available on the International Rectifier website at www.irf.com.

About International Rectifier

International Rectifier (NYSE:IRF) is a world leader in power management technology. IR’s analog- and mixed-signal ICs, advanced circuit devices, integrated power systems, and components enable high-performance computing and reduce energy waste from motors, the world’s single largest consumer of electricity. Leading manufacturers of computers, energy-efficient appliances, lighting, automobiles, satellites, aircraft, and defense systems rely on IR’s power-management benchmarks to power their next generation products.

International Rectifier
http://www.irf.com

IR response management:
Sarah Streeter, International Rectifier Co Ltd,
European Regional Centre, The Omnibus Building, Lesbourne Road, Reigate, Surrey RH2 7JP
Tel: +44 (0)1737 227 266
Fax: +44 (0)1737 227 201
e-mail:


Note: The above text is the public part of the press release obtained from the manufacturer (with minor modifications). EETimes Europe cannot be held responsible for the claims and statements made by the manufacturer. The text is intended as a supplement to the new product presentations in EETimes Europe magazine.


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