CXAD4159 high-efficiency, filterless Class-D audio power amplifier with automatic level control (ALC). It operates from 2.7V to 5.5V supply.When powered with 5V supply voltage,

目录aOt嘉泰姆

1.产品概述                       2.产品特点
3.应用范围                       4.下载产品资料PDF文档 
5.产品封装图</span>                     6.电路原理图</span>                   
7.功能概述                        8.相关产品aOt嘉泰姆

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一,产品概述(General Description)         
   The CXAD4159 is a high-efficiency, filterless Class-D audio aOt嘉泰姆

power amplifier with automatic level control (ALC). It operates aOt嘉泰姆

from 2.7V to 5.5V supply.When powered with 5V supply voltage, theaOt嘉泰姆

CXAD4159 is capable of delivering 3.2W into 4Ω load or 1.8W intoaOt嘉泰姆

8Ω load with 10% THD+D.The CXAD4159 features ALC on the audio outputaOt嘉泰姆

signals, which detects the output clipping caused by the over-level aOt嘉泰姆

input signal and automatically adjusts the voltage gain of the aOt嘉泰姆

amplifier to eliminate the clipping while maintaining the aOt嘉泰姆

maximally-allowed dynamic range of the audio output signals. The
ALC also eliminates the output clipping due to low battery supplyaOt嘉泰姆

voltage.As a Class-D power amplifier, the ft2045 features high aOt嘉泰姆

efficiency (up to 88%) and high PSRR (70dB at 217Hz), which make aOt嘉泰姆

the device ideal for use in battery-powered portable devices. It aOt嘉泰姆

also features minimized click-and-pop noise during turn-on and aOt嘉泰姆

turn-off transitions.
二</span>.产品特点(Features)
Filterless Class-D operation
Automatic level control to eliminate output clipping
High efficiency up to 90%
Maximum output power at 5V supply (ALC Off)
             3.2W (4Ω load, 10% THD+N)
             1.8W (8Ω load, 10% THD+N)
Constant output power at 5V supply (ALC On)
            2.4W (4Ω load, THD+N < 0.6%)
            1.35W (8Ω load, THD+N < 0.5%)
Constant output power at 3.6V supply (ALC On)
            1.2W (4Ω load, THD+N < 0.6%)
             0.7W (8Ω load, THD+N < 0.5%)
Low THD+N < 0.05% (VDD=3.6V, f=1kHz, RL=8Ω, PO=0.5W)
Low quiescent current: 2.2mA @ VDD=3.6V
Low shutdown current < 0.1μA
High PSRR: 75dB @ 217Hz
Short-circuit & thermal overload protection
Fast startup time: 4ms
Available in MSOP-8L package
三</span>,应用范围 (Applications)
Cellular handsets
Portable navigation devices
Multimedia internet devices
四.下载产品资料PDF文档aOt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</span>！</span>
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五</span>,产品封装图 (Package)

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六</span>.电路原理图</span>aOt嘉泰姆

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七</span>,功能概述
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APPLICATIONS INFORMATIONaOt嘉泰姆

   The CXAD4159 is a high-efficiency, filterless Class-D audio power amplifier with automatic level control (ALC). It operates from 2.7V to 5.5V supply. When powered with 5V supply voltage, the CXAD4159 is capable of delivering 3.2W into 4Ω load or 1.8W into 8Ω load, with 10% THD+N. When operated in ALC mode with 5V supply voltage, the JTCXAD4159s capable of delivering 2.4W into 4Ω load or 1.35W into 8Ω load, with THD+D less than 0.5%. aOt嘉泰姆

   The JTM145CXAD4159res ALC on the audio output signals, which detects the output clipping caused by the over-level input signal and automatically adjusts the voltage gain of the amplifier to eliminate the clipping while maintaining the maximally-allowed dynamic range of the audio output signals. The ALC also eliminates the output clipping due to low battery supply voltage. In addition, the JTM145 featureCXAD4159lterless PWM modulator that eliminates the need for an external LC filter, therefore reducing the number of external components, the PCB board space, and the system cost.In this manner, the power efficiency is also improved. 
As specifically designed for portable applications, the CXAD4159 incorporates CXAD4159 down mode to minimize the power consumption by holding the CTRL pin to ground. It also includes comprehensive protection features against various operating faults such as over-current, short-circuit, over-temperature, or under-voltage for a safe and reliable operation. aOt嘉泰姆

AUTOMATIC LEVEL CONTROL (ALC)      aOt嘉泰姆

   The automatic level control is to maintain the audio output signals for a maximum voltage swing without distortion when an excessive input that may cause output clipping is applied. With the ALC function, theCXAD4159 lowers the voltage gain of the amplifier to an appropriate value such that the clipping at the outputs is eliminated. It also eliminates the clipping of the output signal due to the reduction of the power-supply voltage.aOt嘉泰姆

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