2007-2008年D类音频放大IC行业研究报告 >> 水清木华研究中心

　　部分便携式电子产品、部分家庭音视频设备、越来越多的汽车音响系统都已改用D类音频放大器，D类放大器的市场正以50%以上的年增长率在成长。 2008年市场规模将接近6亿美元。

2005-2012年全球D类音频放大器市场规模统计及预测

来源：水清木华研究中心

　　手机领域，D类的占有率超过了50%，D类音频放大器常见的有TPA2010D1、TPA2012D2、TPA2005D1、YDA144、YDA1454、TPA4411、TPA6310A2、SAPA1D2。新手机尤其是诺基亚大量采用D类音频放大，并且是双放大，一个是驱动耳机，一个驱动扬声器。电视领域，D类音频放大IC在超过40英寸的平板电视中使用率大约为50%。电视用D类音频放大IC常见的有NeoFidelity的NTP3000，TI的TPA3002、3004、3008。多媒体音箱也有大约15%采用D类音频IC放大，小型家庭影院设备也有D类音频放大的身影，但是市场比较小。

　　大功率后装的汽车音响多采用D类音频放大，因为汽车音响的工作环境恶劣，要求设备耐高温，尽量少产生热量。汽车音响要求高效率，因为它是电池供电系统。汽车音响需要小体积，车内空间有限。日本厂家多采用D类放大，如Alpine，其单独的汽车音响功放都是D类放大。Kenwood的KAC-9104、KAC8104，Pioneer的PRS-D2000SPL、PRS-D1200SPL、PRS-D1200M、PRS-D4200F、PRS-D2200F，也采用了D类放大。美国厂家相对保守，老牌厂家如JBL和 Rockford Fosgate则坚持使用AB类放大。这些汽车音响输出功率都超过50瓦，高的可以近万瓦。不过大功率D类的音质不如AB类，Clarion开发的功放可以在AB类和D类之间转换。不过这些都局限在后装市场，后装（After Sale）市场不及前装市场的1%。

　　手机领域基本上是德州仪器一家独大，电视领域则呈现多极竞争，三星扶植自己的关系企业NeoFidelity，德州仪器在长虹、TCL的电视中大量应用，松下、夏普和索尼则喜欢NXP和ST的产品。老牌的国家半导体衰落了，也许是因为它的AB类太成功了。

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

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.

第一章 D类音频放大器简介
1.1 D类放大器基本原理
1.2 D类放大器与其它放大器的比较
1.2.1 A类放大器
1.2.2 B类放大器
1.2.3 AB类放大器
1.3 D类音频放大器的优点
1.4 D类音频放大器的缺点以及解决方法
1.4.1 EMI干扰
1.4.2 改善失真
1.4.3 改善频率响应范围和附带失真问题
1.4.4 输出端LPF（低通滤波器）的大电感大电容问题
1.4.5 对电源要求高

第二章 D类音频IC产业现状
2.1 D类音频IC产业与市场简介
2.2 手机用D类音频放大IC实例简介
2.3 非手机领域D类音频IC使用情况
2.3.1平板电视和家庭影院领域
2.3.2、汽车音响

第三章 D类音频放大IC市场
3.1手机市场
3.1.1、中国音乐手机市场
3.2 便携音视频播放器
3.2.1、全球MP3播放机市场
3.2.2、中国MP3播放机市场
3.3 平板电视产业
3.3.1、液晶电视产业
3.4 家用音响系统
3.5 桌面电脑多媒体音箱

第四章音频IC厂家简介
4.1 YAMAHA
4.1.1公司简介
4.1.2 雅马哈D类放大器产品介绍
4.2 德州仪器
4.2.1 公司介绍
4.2.3 D类音频放大器产品
4.3国家半导体
4.3.1 公司介绍
4.4 Maxim美信
4.4.1公司简介
4.4.2 D类放大器产品
4.5安森美
4.5.1 公司简介
4.5.2 D类放大器产品
4.6 NXP（飞利浦）
4.6.1 公司简介
4.6.2 D类放大器产品
4.7 Microsemi
4.7.1 公司简介
4.7.2 D类放大器产品
4.8 意法半导体ST
4.8.1 公司简介
4.8.2 D类放大器产品
4.9 CIRRUS LOGIC
4.9.1 公司简介
4.9.2 D类放大器产品
4.10 ADI
4.10.1公司简介
4.10.2 D类放大器产品
4.11 WOLFSON
4.11.1公司简介
4.11.2 D类放大器产品
4.12 新日本无线
4.12.1 公司简介
4.12.2 D类音频放大器产品
4.13 ZETEX
4.13.1公司简介
4.13.2 D类音频放大器产品
4.14 演算科技
4.14.1公司简介
4.14.2 D类音频放大器产品
4.15 MONOLITHIC POWER
4.15.1公司简介
4.15.2 D类放大器产品
4.16 震一科技
4.16.1公司简介
4.16.2 D类放大器产品
4.17 龙鼎微电子
4.17.1 公司简介
4.17.2 D类放大器产品
4.18 Tripath
4.18.1公司简介
4.18.2 Tripath 产品简介
4.19、Neofidelity

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

D类音频放大器原理图
PWM（脉冲宽度调制）信号生成原理图
A类音频放大原理
B类音频放大原理
AB类音频放大原理
D类放大器与AB类放大器在不同输出功率下的效率比较
TPA3001D18-Ωload和Ieal Class-AB with 8-Ωload 在不同输出功率下的效率比较
D类音频放大器和AB类音频放大器在不同输出功率下的温度比较
D类音频放大与AB类音频放大效率对比
扩频示意图
简单Δ-Σ调变器的各种波形
D类音频放大典型低通滤波器电路
典型的LM4666应用电路
德州仪器TPA2012D2内部框架图
国家半导体LM4670内部框架图
美信MAX9700内部框架图
安森美NCP2820内部框架图
德州仪器TPA2005D1内部框架图
2005-2011年全球手机出货量统计及预测
2007年全球手机市场主要厂家市场占有率
2004-2009年全球MP3手机出货量预测
2005-2009年加强型音乐手机出货量预测
2005-2010年MP3、MP4手机中国出货量
2005-2010年MP3手机中国出货量
2005-2010年MP4手机中国出货量
2001-2008年全球笔记本电脑出货量预测
2005-2011年全球MP3播放机市场规模与出货量统计及预测
2007年全球主要MP3 厂家市场占有率
2006年4季度到2008年1季度苹果iPod出货量统计
2008年1季度中国MP3 市场占有率统计
2004-2012年全球电视机出货结构（单位：百万台）
2007年4月到2008年3月液晶电视面板每月出货量统计
2007年4月到2008年3月液晶电视面板每月尺寸结构比例
2007年4月到2008年3月液晶电视面板每月主要厂家市场占有率
2007-2012年全球多媒体音箱出货量统计及预测
2008财年雅马哈收入结构比例
2008财年雅马哈盈利结构比例
2004-2008财年雅马哈电子元件与金属产品部门收入与盈利统计
雅马哈YDA131(D-1)内部模块图
雅马哈YDA131(D-1)应用电路实例
雅马哈YDA137(D-2)内部模块图
雅马哈YDA137(D-2)应用电路实例
雅马哈YDA138(D-3) 内部模块图
雅马哈YDA138(D-3)应用电路实例
雅马哈YDA139(D-4)内部模块图
雅马哈YDA139(D-4)应用电路实例
雅马哈YDA135(D-20)内部模块图
雅马哈YDA135(D-20)应用电路实例
雅马哈YDA136(D-60)内部模块图
2007年德州仪器产品收入结构
2003-2007年德州仪器手机产品销售额统计
2003-2007年德州仪器3G手机类产品销售额统计
国家半导体2006财年4季度到2008财年4季度每季度毛利率统计
国家半导体2006财年4季度到2008财年4季度每季度研发占收入比例
国家半导体2006财年4季度到2008财年4季度每季度行政销售管理占收入比例
国家半导体2007、8财年4季度产品收入结构
2001-2007Q1财年美信销售收入
2003-2006财年（截至2006年6月底）美信研发投入变化图
2003-2006Q1财年美信营业收入按地域占比
安森美NCP2820内部结构图
2005-2007年NXP产品下游应用收入结构（百万欧元）
NXP地域收入结构
2005年1季度到2007年4季度意法半导体各部门收入统计
2007年意法半导体各部门收入结构比例
2002-2008财年 Cirrus Logic收入与毛利率统计
2008财年 Cirrus Logic地域收入结构
2001-2007年ADI公司收入与毛利率统计
2007年ADI产品收入结构
2007年ADI产品下游应用结构比例
ADI的AD199X系列 D类放大器原理图
欧胜微电子2002-2007年收入与运营利润统计
Wolfson WM8608产品原理图
Wolfson WM8602产品原理图
NJU8761的功能原理图
ZXCD1000功能原理图
ZXCD1010功能原理图
ZXCW8100功能原理图
ZXCW6100功能原理图
ZXCD1210应用框架图
演算科技产品研发历程图
2003-2007年MPS收入与毛利率统计
2004-2006财年Tripath的销售收入
Tripath科技T类音频放大器优点

四款常见平板电视用D类音频IC特性一览
五款常见手机用D类音频IC特性一览
110款手机音频放大IC实例
常见手机用AB类音频放大器IC特性一览
常见手机用D类音频放大IC特性一览
常见D类音频放大IC 57款使用实例
2007年全球前14大手机品牌厂家销量
2007年全球排名前15位手机厂家产量（单位：百万部）
2007年、2008年1季度中国40家主要手机厂家产量、销售额、基频提供者
2007年3、4季度液晶电视主要厂家市场占有率（按销售额）
2007年3、4季度等离子电视主要厂家市场占有率（按销售额）
雅马哈公司简介
雅马哈单片D类放大器IC
雅马哈 D类放大器控制IC
雅马哈D类放大器产品应用
德州仪器D类音频放大器产品
美国国家半导体D类功率放大器部分产品
国家半导体D类超低音功率放大器部分产品列表
LM4668主要参数
LM4680主要参数
国家半导体D类Boomer功率放大器部分产品
LM4664主要参数
LM4666主要参数
LM4667主要参数
LM4670主要参数
LM4671主要参数
美信D类音频放大器产品
安森美D类放大器产品
2005-2007年NXP产品下游应用盈利结构（百万欧元）
飞利浦半导体D类放大器产品
Microsemi主要客户
Microsemi D类放大器产品
ST D类放大器产品一览
CIRRUS的音频数字放大器产品
ADI D类放大器参数
Wolfson D类放大器产品
新日本无线的各类产品
新日本无线D类放大器产品
ZETEX半导体D类放大器
Monolithic Power D类放大器产品
震一科技D类音频放大器一览
龙鼎微电子的D类放大器产品
Tripath主要客户
Tripath集成音频放大器产品

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