CXAR41203是1.2W集成的音频功率放大器移动电话等便携式应用程序的音频性能内部热关机保护机制从5.0V电源驱动8Ω扬声器时1%的失真（THD+N）提供1.2W的连续输出功率快速开启时间单位增益稳定

CXAR41203是一个1.2W、完全集成的音频功率放大器。它旨在最大限度地提高移动电话等便携式应用程序的音频性能。便携式应用要求音频功率放大器具有最少的外部组件，并且可以从单个2.5V到5.5V电源工作。当CXAR41203从5.0V电源驱动8Ω扬声器时，它能够以1%的失真（THD+N）提供1.2W的连续输出功率。
CXAR41203具有低功耗关机模式，这是通过驱动逻辑低的关机引脚来实现的。此外，CXAR41203具有内部热关机保护机制。
CXAR41203不需要输出耦合电容器或自举电容器，因此非常适合移动电话和其他低电压应用，其中最低功耗是主要要求。
为了获得最大的灵活性，CXAR41203提供了一个外部控制的增益（带电阻器）和一个外部控制的开启时间（带旁路电容器）。当使用1μF旁路电容器时，当V+等于5.0V时，它提供145ms的唤醒时间。
CXAR41203有绿色TDFN-2×2-8L包装。它在-40℃到+85℃的环境温度范围内工作。
•非常适合笔记本电脑、PDA和
其他小型便携式音频设备
•1.2W到8ΩBTL负载，从5V电源
THD+N=1%（典型值）
•卓越的PSRR：直接连接到电池
•快速开启时间
•单位增益稳定
•2.5V至5.5V操作
•关断电流：0.02μA（典型值）
•关闭引脚与1.8V逻辑兼容

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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The CXAR41203 is a 1.2W, fully integrated, audio power amplifier. It is designed to maximize audio performance in portable applications such as mobile phone. The portable application requires audio power amplifier has minimum of external components and can operate from a single 2.5V to 5.5V power supply. CXAR41203 is capable of delivering 1.2W of continuous output power with typically 1% distortion (THD+N) when it drives an 8Ω speaker from a 5.0V power supply.

The CXAR41203 features a low power consumption shutdown mode, which is achieved by driving the shutdown pin with a logic low. Additionally, the CXAR41203 features an internal thermal shutdown protection mechanism.

The CXAR41203 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.

For maximum flexibility, the CXAR41203 provides an externally controlled gain (with resistors), as well as an externally controlled turn-on time (with the bypass capacitor). When using a 1μF bypass capacitor, it offers 145ms wake-up time when V₊ is equal to 5.0V.

The CXAR41203 is available in Green TDFN-2×2-8L package. It operates over an ambient temperature range of -40℃ to +85℃.

   产品特点 返回TOP

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• Ideal for Notebook Computers, PDAs, and
    Other Small Portable Audio Devices
• 1.2W into 8Ω BTL Load from 5V Supply at
    THD+N = 1% (TYP)
• Excellent PSRR: Direct Connection to Battery
• Fast Turn-On Time
• Unity Gain Stable
• 2.5V to 5.5V Operation
• Shutdown Current: 0.02μA (TYP)
• Shutdown Pin is Compatible with 1.8V Logic
• -40℃ to +85℃ Operating Temperature Range
• Available in Green TDFN-2×2-8L Package

   应用范围 返回TOP

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Portable Systems
MP3 Players
Mobile Phone
PDAs
GPS

   技术规格书（产品PDF) 返回TOP 

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产品封装图 返回TOP

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电路原理图 返回TOP

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音频功率放大器
Part Number	CH	SHDN	VCC (Min)(V)	VCC (Max)(V)	Differential  Input	Output Voltage @VCC=3.6V(W)	Output Voltage  @VCC=5V(W)	Package
CXAR41199	Stereo	H	2.8	5.5	N	0.7	1.3	DIP-16 TSSOP-20(EP) TSSOP -16(EP) SOIC-16TQFN-3x3-20L
CXAR41200	Stereo	L	2.6	5.5	N	0.7	1.3	TQFN-4x4-16L
CXAR41201	Mono	H	2.5	5.5	N		1.2	SOIC-8 SOIC-8(EP)
CXAR41202	Stereo	L	2.8	5.5	N	0.7	1.3	TQFN-4x4-24L
CXAR41203	Mono	L	2.5	5.5	N	0.6	1.2	TDFN-2x2-8L
CXAR41204	Mono	L	2.5	5.5	Y	0.65	1.3	TDFN-3x3-8L MSOP-8(EP)
CXAR41205	Mono	L	2.5	5.5	Y	0.65	1.3	TDFN-2x2-8L
CXAR41206	Mono	L	2.5	5.5	Y	0.65	1.3	MSOP-8 MSOP-10 TDFN-3x3-10L