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Class-D amp cuts cost in high-power stereos

Posted: 10 Oct 2008 ?? ?Print Version ?Bookmark and Share

Keywords:class-D amplifier? PCB? audio system?

NXP Semiconductors has released the TDA8950 highly integrated stereo class-D amplifier suitable for single layer PCB use, delivering bigger, better sound on slim-line audio systems.

The TDA8950, a 2x150W to 170W class-D amplifier, has been specially designed for use on single-layer PCBsfeeding into manufacturer demand for more power with smaller design and lower costs.

The amplifier supports audiophile audio performance with very low dissipation, operates over a wide supply voltage range from 12.5V to 40V and consumes a very low quiescent current. Combined with improved EMI performance and thermal fold-back to avoid audio stops, the TDA8950 offers performance and cost efficiencies to enable OEMs to deliver high-power stereo output with sleek designincluding mini/micro Hi-Fi's, home theater systems, professional music amplifiers and public address systems.

"NXP's TDA8950 stereo class-D amplifier is a perfect fit for futuristic slim-line audio systems. As consumers demand high-quality performance at competitive prices, the ability to use a single layer PCB allows significant savings in cost, while the TDA8950 delivers excellent audio," said Jan-Paul Huyser, international product marketing manager for audio amplifier ICs at NXP. "Building on our leadership position in audio amplifiers, NXP's TDA8950 mirrors market demand and provides customers a complete amplification module to aid their development of advanced audio solutions, enhancing performance while reducing time to market."

Key features of NXP's TDA8950 integrated stereo class-D amplifier include:
? Fully integrated stereo SE class-D amplifier
? Up to 2x170W output power
? Integrated pulse width modulation controller with 2nd order feedback
? 85V total maximum operating supply voltage
? Excellent audio with low distortion levels
? Up to 10dB improvement in EMI radiation levels
? Thermal fold-back with a tiny heat sink ensure uninterrupted audio performance at high IC temperatures
? Pop free on/off switching
? High power supply noise rejection ratio
? Current clipping protection (will not switch off when a complex speaker load forces the over- current protection to be activated)

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