(Entertainment-NewsWire.com, March 16, 2016 ) The operational limitation of class D amplifiers, such as electromagnetic interference (EMI), narrow frequency range, distortion, high cost and narrow dynamic range are some of the factors, hindering the wide spread acceptance of audio class D amplifiers. The high cost and electromagnetic interference (due to electromagnetic signal associated with wireless communication) is hindering growth of the audio class D market in multimedia mobile phone applications. This has led the audio class D amplifier manufacturers to concentrate on other growing industries, such as flat screen television, and high end automotive audio system. Based on market type, the global audio class D amplifier market can be segmented as OEM, and after market.
Audio class D amplifier, commonly known as switch amplifier transforms the initially modulated analog input audio signal, or pulse-code modulated (PCM) digital information into pulse-width modulation (PWM) or pulse-density modulation (PDM). Audio class D amplifiers are also used widely as a switch device for large size audio power amplifier. The theoretical efficiency and practical efficiency of audio class D amplifiers are highest among all other class of amplifiers, such as class A, class B, and class AB. The higher efficiency of class D amplifiers is important for the audio amplification in mobile phones and MP3 players, as it offers power saving potential, along with instant switching capability.
Based on end users, the global audio class D amplifier can be classified as television (TV), portable music device, automotive audio system, and others. The automotive audio system is expected to be the dominant market segment, over the next four to five years; however the growth is expected to be fairly moderate over the coming years, owing to the maturing automotive audio market and falling prices of car audio system. The audio class D market is highly consolidated, due to the market dominance of few players. The major market players in the audio class D amplifiers industry are focusing on new product development, in order to increase their revenue. The audio class D amplifiers manufacturers are introducing new products to meet the regulatory requirements. For instance, Texas Instruments, a U.S. based company has introduced LM4675 mono, and Class D Boomer audio amplifier, which has electromagnetic interference (EMI) level below 11 dB (11 dB is the maximum EMI level allowed in the audio amplifier by the United States Federal Communications Commission in portable devices, including smart phones, notebook computers, music players, DVD players, other portable electronics).
Some of the competitors in the audio class D amplifiers market are STMicroelectronics, Cirrus Logic, Texas Instruments, Maxim Integrated Products, Analog Devices, RoHM, NXP Semiconductors, On Semiconductor, Monolithic Power Systems, Inc., Intersil and International Rectifier.
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