Class D Audio Amplifier IC Industry Report, 2007-2008
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Nowadays, some portable electronics, some home audio/video devices and more and more car audio system are changing to the application of class-D audio amplifier. The market of Class-D audio amplifier is growing at a rate of above 50 percent. In 2008, its market size is expected to reach nearly US$600 million.

Statistics and Forecast of Global Class-D Audio Amplifier Market Size 2005-2012

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Source: ResearchInChina

Class-D audio amplifier applied in handsets accounts for more than 50% of the market share, and it mainly has the following types, TPA2010D1, TPA2012D2, TPA2005D1, YDA144, YDA1454, TPA4411, TPA6310A2, and SAPA1D2. New mobile phones, especially Nokia's new handsets, apply a large amount of Class-D audio amplifiers, and use a pair of amplifiers, one is headphone driver and the other is loudspeaker driver.

Regarding the television market, utilization ratio of Class-D audio amplifier in flat panel television with screen sizes of above 40 inches is about 50%. Class-D audio amplifiers IC commonly applied in televisions are NeoFidelity's NTP3000 and TI's TPA3002, 3004 and 3008. Around 15% multimedia sound boxes apply Class-D audio amplifier. Small home theater equipment also uses Class-D audio amplifier, but the market is relatively small.

After-market audio with high power mostly adopts Class-D audio amplifier, as the working conditions of auto acoustics are harsh, requiring high temperature resistance and minimum reduction of heat. Besides, auto acoustics require small size, due to limited space in a car. Most of Japanese producers prefer Class-D. For instance, all of Alpine's acoustics power amplifiers use Class-D, while Kenwood's KAC-9104 and KAC8104 and Pioneer's PRS-D2000SPL, PRS-D1200SPL, PRS-D1200M, PRS-D4200F and PRS-D2200F also use Class-D. American manufacturers are relatively conservative, and producers like JBL and Rockford Fosgate still persist in using Class-AB amplifier. The output power of these auto acoustics are all above 50 watts and can be as high as nearly 10,000 watts. Yet, the sound quality of big power Class-D is inferior to that of Class-AB. The power amplifiers developed by Clarion can be converted between Class-AB and Class-D, which are, however, all limited to auto aftermarket that is less than 1% of auto before-market.

Regarding Class-D audio amplifier IC applied in mobile phone, TI possesses the absolutely dominant position in the market. In terms of its application in the television field, the market is carved up by several competitors.
Samsung supports NeoFidelity, which maintains a good relationship with Samsung. TI's key clients include Changhong and TCL, TV producers in Mainland China, while Panasonic, Sharp and Sony favor products of NXP and ST. The old brand National Semiconductor is declining, maybe because its Class-AB products are too successful.

1 Brief Introduction to Class-D Audio Power Amplifier 
1.1 Basic Principles 
1.2 Comparison between Class-D Amplifier and Other Amplifiers 
1.2.1 Class-A Amplifier 
1.2.2 Class-B Amplifier 
1.2.3 Class-AB Amplifier 
1.3 Merits of Class-D Audio Amplifier 
1.4 Faults of Class-D Audio Amplifier and Its Solutions 
1.4.1 EMI (Electro Magnetic Interference) 
1.4.2 Distortion Improving 
1.4.3 Improvement of Frequency Response Scope and Distortion Problems 
1.4.4 Big Capacitance & Inductance Issues of the Output End LPF 
1.4.5 High Requirement for Power 

2. Class-D Audio IC Industry 
2.1 Brief Introduction to Class D Audio IC Industry and Market 
2.2 Application of Class D Audio Amplifier IC in Mobile Phone 
2.3 Application of Class D Audio Amplifier IC in Non-handset Fields 
2.3.1 Flat Panel TV and Home Theater 
2.3.2 Auto Acoustics 

3. Market of Class D Audio Amplifier IC 
3.1 Mobile Phone Market 
3.1.1 China Music Mobile Phone Market 
3.2 Portable Audio/Video Player 
3.2.1 Global MP3 Player Market 
3.2.2 China's MP3 Player Market 
3.3 Flat Panel TV Industry 
3.3.1 LCD TV Industry 
3.4 Home Audio System 
3.5 Desktop PC Multimedia Sound Case 

4. Audio IC Manufacturers 
4.1 Yamaha 
4.1.1 Company Profile 
4.1.2 Class-D Amplifier 
4.2 Texas Instruments (TI) 
4.2.1 Company Profile 
4.2.2 Class-D Amplifier 
4.3 National Semiconductor Corporation 
4.3.1 Company Profile 
4.3.2 Class-D Amplifier 
4.4 Maxim 
4.4.1 Company Profile 
4.4.2 Class-D Amplifier 
4.5 ON Semiconductor 
4.5.1 Company profile 
4.5.2 Class-D Amplifier 
4.6 (NXP) Philips
4.6.1 Company profile
4.6.2 Class-D Amplifier
4.7 Microsemi 
4.7.1 Company profile
4.7.2 Class-D Amplifier
4.8 STMicroelectronics
4.8.1 Company profile
4.8.2 Class-D Amplifier
4.9 CIRRUS
4.9.1 Company profile
4.9.2 Class-D Amplifier
4.10 ADI 
4.10.1 Company Profile
4.10.2 Class-D Amplifier
4.11 WOLFSON
4.11.1 Company Profile
4.11.2 Class D Amplifier 
4.12 NJRC
4.12.1 Company Profile
4.12.2 Class D Amplifier
4.13 ZETEX
4.13.1 Company Profile
4.13.2 Class-D Amplifier
4.14 AT CHIP
4.14.1 Company Profile
4.14.2 Product 
4.15 Monolithic Power
4.15.1 Company Profile
4.15.2 Class D Amplifier
4.16 TaiMEC
4.16.1 Company Profile
4.16.2 Class-D Amplifier
4.17 PAM
4.17.1 Company Profile
4.17.2 Class-D Amplifier
4.18 Tripath
4.18.1 Company Profile
4.18.2 Class-D Amplifier
4.19 Neofidelity
Principle Diagram of Class-D Audio Power Amplifier
Principle Diagram of PWM (Pulse Width Modulation) Signal Formation
Principles of Class-A Audio Power Amplifier
Principles of Class-B Audio Power Amplifier
Principles of Class-AB Audio Power Amplifier
Comparison of Efficiency under Different Power Output between Class-D Amplifier and Class-AB Amplifier 
Comparison of Efficiency under Different Power Output between TPA3001D18-Ωload and Ideal Class-AB with 8-Ωload by Efficiency
Comparison of Temperature under Different Power Output between Class-D Amplifier and Class-AB Amplifier
Comparison of Efficiency between Class-D Audio Power Amplifier and Class-AB Audio Power Amplifier
Sketch Map of Spread Spectrum
Various Waveforms of Simple Δ-Σ Modulator
Typical Low-Pass Filter Circuit of Class-D Audio Power Amplifier
Typical Application Circuit of LM4666
Statistics and Forecast of Global Class-D Audio Amplifier Market Size, 2005-2012
Revenue of Class-D Audio Amplifier by Application, 2008
Forecasted Market Shares of World's Major Class-D Audio Amplifier IC Manufacturers, 2008
Statistics on Released Amount of Global Main Class-D Audio IC
Block Diagram of Texas Instrument TPA2012D2
Block Diagram of National Semiconductor LM4670
Block Diagram of MAXIM MAX9700
Block Diagram of ONS NCP2820
Block Diagram of TI TPA2005D1
Statistics and Forecast of Global Mobile Phone Shipment, 2005-2011
Market Shares of Global Major Handset Brands, 2007
Statistics and Forecast of Global Shipment of Mobile Phone with MP3, 2004-2009
Forecast of Enhanced Music Handset Shipment, 2005-2009
Shipment of Mobile Phone with MP3 and MP4 Player in China, 2005-2010
Shipment of Mobile Phone with MP3 Player, 2006-2010
Shipment of Mobile Phone with MP4 Player in China, 2006-2010
Statistics & Forecast of Global MP3 Player Market Size & Shipment, 2005-2011
Market Shares of Main Global MP3 Manufacturers, 2007
Quarterly Shipment of Apple IPOD, Q4 2006-Q1 2008
Quarterly Shipment of Apple IPOD, Q4 2006-Q1 2008
Market Shares of China's MP3, Q1 2008
Structure of Global TV Shipment, 2004-2012
Monthly Shipment of LCD TV Panel, Apr.2007-Mar.2008
Monthly Structure & Proportion of LCD TV Panel Sizes, Apr.2007-Mar.2008
Monthly Market Shares of Main LCD TV Panel Producers, Apr.2007-Mar.2008
Statistics & Forecast of Global Multimedia Sound Case Shipment, 2007-2012
Revenue Structure of YAMAHA, FY2008
Profit Structure of YAMAHA, FY2008
Revenue & Profit of YAMAHA Electronic Components and Metal Product Divisions, 
FY2004-FY2008
Block Diagram of Yamaha YDA131 (D-1)
Application Circuit of Yamaha YDA131 (D-1)
Block Diagram of Yamaha YDA137 (D-2)
Application Circuit of Yamaha YDA137 (D-2)
Block Diagram of Yamaha YDA138 (D-3)
Application Circuit of Yamaha YDA138 (D-3)
Block Diagram of Yamaha YDA 139 (D-4)
Application Circuit of Yamaha YDA139 (D-4)
Block Diagram of Yamaha YDA 135 (D-20)
Application Circuit of Yamaha YDA 135 (D-20)
Block Diagram of Yamaha YDA 136 (D-60)
Revenue Structure of TI, 2007
Sales of Mobile Phone Products of TI, 2003-2007
3G Handset Revenue of TI, 2003-2007
Quarterly Gross Profit Margin of National Semiconductor, Q4 2006FY-Q4 2008FY
Ratio of R&D Spending to Revenue of NSM, FY2006Q4-FY2008Q4
Ratio of Administrative Expenses to Revenue of NSM, FY2006Q4 -FY2008Q4
Revenue Structure of National Semiconductor, FY2007Q4 & FY2008Q4
Sales Revenue of Maxim, 2001-FY2007Q1
Changes in R&D Investment of Maxim, FY2003-FY1H2006
Operating Revenue of Maxim by Region, 2003-FY2006Q1
Block Diagram of ON Semiconductor NCP2820
NXP Revenue Structure of Product downstream Application, 2005-2007
Regional Revenue Structure of NXP
ST Revenue by Department, Q1 2005-Q4 2007
ST Revenue Structure by Department, 2007
Revenue and Gross Profit Margin of Cirrus Logic, FY2002-FY2008
Regional Revenue Structure of Cirrus Logic, FY2008
Revenue and Gross Profit Margin of ADI, 2001-2007
Revenue Structure of ADI, 2007
ADI Structure of Product Downstream Applications, 2007
Principle Diagram of DI AD199X Class D Amplifier
Revenue and Operating Profit of Wolfson, 2002-2007
Principle Diagram of Wolfson WM8608
Principle Diagram of Wolfson WM8602
Principle Diagram of NJU8761 Function
Functional Block Diagram of ZXCD1000
Functional Block Diagram of ZXCD1010
Functional Block Diagram of ZXCW8100
Functional Block Diagram of ZXCW6100
Application Structure of ZXCD1210
Revenue and Gross Profit Margin of MPS, 2003-2007
Sales Revenue of Tripath, FY2004-2006
Advantages of Tripath Class-T Audio Amplifier
Features of Class D Audio IC Commonly Applied in Flat Panel TV
Features of Class D Audio IC Commonly Applied in Mobile Phone
Audio Amplifier IC Applications in 110 Models of Handsets
Characteristics of Common Handset-based Class-AB Audio Amplifier IC
Characteristics of Common Handset-based Class-D Audio Amplifier IC
Application of Common Class-D Audio Amplifier IC in 57 Models of Handsets
Car Class-D Audio Amplifiers of Alpine
Sales of Global Top 14 Handset Brands, 2007
Output of Global Top 15 Handset Manufacturers, 2007
Output & Sales of Chinas’ Top 40 Handset Producers & Baseband Provider, 200-2008Q1
Market Shares of Global Key TV Producers (by Sales Value), 3Q2007-4Q2007
Market Shares of Global Main TV Producers (by Shipment), 3Q2007-4Q2007
Market Shares of Main LCD TV Producers (by Sales Value), 3Q2007-4Q2007
Market Shares of Key Plasma TV Producers (by Sales Value), 3Q2007-4Q2007
Brief Introduction to Yamaha
Class-D Amplifier IC (Single Chip) of YAMAHA
Class-D Amplifier Control IC of Yamaha
Application of YAMAHA Class-D Amplifier Products
Class-D Audio Amplifier Products of TI
Some Products of National Semiconductor's Class-D Power Amplifier
Some Products of National Semiconductor's LFE Power Amplifier
Some Products of National Semiconductor's Class-D Boomer Amplifier
Class-D Audio Amplifier Products of Maxim
Class D Amplifier Products of ON Semiconductor
Profits of NXP by Application, (Unit: EUR1 million)
Class D Amplifier Products of Philips
Latest Financial Information of Microsemi
Main Clients of Microsemi
Class D Amplifier Products of Microsemi
Class-D Amplifier Products of ST
Audio Digital Amplifier Products of CIRRUS
Parameters of ADI Class-D Amplifier
Class-D Audio Output Power Stage
Class-D Amplifier Products of Wolfson
Wireless Products of NJRC
NJRC Class-D Amplifier Products
ZETEX Class-D Amplifier Products
Class-D Amplifier Products of Monolithic Power
Class-D Amplifier Products of TaiMEC
Class-D Amplifier Products of PAM
Main Clients of Tripath
Integrated Audio Amplifier Products of Tripath
Main Products of Neofidelity

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