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CXAR41304是一款D类双通道音频功率放大器，在 VBAT=4.2V、THD+N=10%，4Ω负载条件下能连续输 出2*4.5W功率。该D类功放的电源电压由内置的自适 应双电荷泵升压模块提供。该升压模块在低功率时不 升压，可有效提升电池的播放时间。 CXAR41304的最大特点是防削顶失真（ACF）输出 控制功能，可检测并抑制由于输入音乐、语音信号幅 度过大所引起的输出信号削顶失真（破音），也能自 适应地防止在升压电压下降所造成的输出削顶，显著 提高音质，创造非常舒适的听音享受，并保护扬声器 免受过载损坏。其具有4种不同的ACF模式，可针对 不同应用场合。同时芯片还具有ACF-Off 模式。 CXAR41304具有AB类和D类的自由切换功能，在受 到D类功放EMI干扰困扰时，可随时切换至AB类音频 功放模式（此时电荷泵升压功能关闭）。 CXAR41304内部集成免滤波器数字调制技术，能够 直接驱动扬声器，并最大程度减小脉冲输出信号的失 真和噪音。输出无需滤波网络，极少的外部元器件节 省了系统空间和成本，是便携式应用的理想选择。 此外，CXAR41304内部固定28dB增益，内置的关断 功能使待机电流最小化，还集成了输出端过流保护、 片内过温保护和电源欠压异常保护等功能。DnO嘉泰姆
CXAR41304 is a Class D stereo audio amplifier which can deliver continuous 2*4.5W output power into a 4Ω speaker with 4.2V battery supply when THD+N = 10%. The class D audio amplifier’s power supply is adaptively boosted by the integrated charge pump regulator which only works while the output power is big enough. This will significantly extend the playing time in battery supply applications. CXAR41304 features Anti-Clipping Function (ACF) which detects output signal clip due to the over input signal and suppresses the output signal clip automatically. Also, it can adapt the output clip caused by power supply voltage down. It can significantly improve the sound quality, creating a very comfortable musical enjoyment, and to protect the speakers from overload damage. It provides 4 different ACF modes and ACF OFF mode to adjust different applications. Class AB amplifier mode is also available for CXAR41304. Once the EMI Interference from class D and Boost Converter becomes an annoying problem, CXAR41304 can be changed into Class AB mode. CXAR41304 has a filter-less modulation circuit which directly drives speakers while realizes low distortion and low noise characteristics. Thanks to filter-less, circuit design with fewer external parts can be made in portable applications. CXAR41304 has an internal gain of 28dB and an independent Shutdown function which can minimize the power consumption. As for protection function, over current protection function for speaker output terminals, over temperature protection function, and low supply voltage malfunction preventing function are also prepared.

   产品特点 返回TOPDnO嘉泰姆

   ・4种防削顶失真功能(Anti-Clipping Function, ACF)DnO嘉泰姆

・自适应电荷泵升压功能DnO嘉泰姆
・内部固定28dB增益DnO嘉泰姆
・输出功率DnO嘉泰姆

2*4.5W (VBAT=4.2V, RL=4Ω, THD+N=10%)DnO嘉泰姆
2*3.5W (VBAT=3.7V, RL=4Ω, THD+N=10%)DnO嘉泰姆
2*2.7W (VBAT=3.3V, RL=4Ω, THD+N=10%)DnO嘉泰姆

・效率DnO嘉泰姆

81% (VBAT=3.7V, RL=4Ω, 0.4W)DnO嘉泰姆
73% (VBAT=3.7V, RL=4Ω, 1W)DnO嘉泰姆

・电源DnO嘉泰姆

-升压输入VBAT：2.7V至5.5VDnO嘉泰姆
-升压输出CPOUT：6.4VDnO嘉泰姆

・静态工作电流：7mADnO嘉泰姆
・关断电流：<1uADnO嘉泰姆
・AB/D类可切换DnO嘉泰姆
・免滤波器数字调制，直接驱动扬声器DnO嘉泰姆
・保护功能:过流/过热/欠压异常保护功能DnO嘉泰姆
・无铅封装， TSSOP24-PPDnO嘉泰姆

   应用范围 返回TOPDnO嘉泰姆

   ・智能音响DnO嘉泰姆

・无线音响DnO嘉泰姆
・便携式音频设备DnO嘉泰姆
・智能手机DnO嘉泰姆
・Smart SpeakersDnO嘉泰姆
・Wireless SpeakersDnO嘉泰姆
・Portable Audio DevicesDnO嘉泰姆
・Smart PhonesDnO嘉泰姆

   技术规格书（产品PDF) 返回TOP DnO嘉泰姆

     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！DnO嘉泰姆
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   电路原理图 返回TOPDnO嘉泰姆

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