Driving the amps

International Rectifier’s IR2011 is a high- and low-side MOSFET driver IC for 100W to 1000W Class D audio amplifier circuits. The new 200V driver device has a maximum ambient temperature rating of 125 degrees C, which improves safety margins compared to similar devices rated at 85 degrees C.

Class D audio circuits are more efficient, and can be made more compact than linear or Class AB amplifier circuits. Applications for Class D amplifiers range from battery-powered portable products to high-end professional amplifiers, musical instruments and car and home multimedia systems.

“Typical voltage ratings for audio driver ICs on the market now range from 85V to 100V, and ambient temperature ratings average 85 degrees C. The new IR2011, housed in the SO-8 package, will enable manufacturers to safely and efficiently boost their Class D audio amplifier performance, yet retain a small footprint,” said David Tam, Vice President of IR’s Consumer and Industrial Sector Business.

The device has matched propagation delay on both channels to simplify high frequency circuits needed for optimum total harmonic distortion (THD) response. Logic inputs are compatible with CMOS or LSTTL output to 3.0V without any speed degradation.

The new IR2011 Class D audio driver IC is available immediately. Pricing is $1.25 each for the IR2011 in the 8-pin DIP and $1.30 each for the IR2011S in the SO-8 package, both in 10,000-unit quantities.

The IR2011 is also available in a lead-free package.