CXAR41304 is a Class D dual-channel audio power amplifier that can continuously output 2*4.5W power under VBAT = 4.2V, THD + N = 10%,4Ω load conditions. The supply voltage for the Class D amplifier is provided by a built-in adaptive dual charge pump boost module. The boost module does not boost at low power, which can effectively improve the playing time of the battery. The biggest feature of the CXAR41304 is the anti-clipping distortion (ACF) output control function, which can detect and suppress the clipping distortion (sound breaking) of the output signal caused by the excessive amplitude of the input music and voice signals, and can also adaptively prevent the output clipping caused by the drop of the boost voltage, significantly improve the sound quality, create very comfortable listening enjoyment, and protect the speaker from overload damage. It has 4 different ACF modes, which can be used for different applications. At the same time, the chip also has a ACF-Off mode. The CXAR41304 has the free switching function of Class AB and Class D, and can switch to Class AB audio power amplifier mode at any time when troubled by EMI interference of Class D power amplifier (charge pump boost function is turned off at this time). CXAR41304 integrated filter-free digital modulation technology, it can directly drive the speaker, and minimize the distortion and noise of the pulse output signal. The output does not require a filter network, and minimal external components save system space and cost, making it ideal for portable applications. In addition, the CXAR41304 has an internal fixed 28dB gain, the built-in shutdown function minimizes the standby current, and also integrates functions such as output over-current protection, on-chip over-temperature protection and power supply under-voltage abnormal protection.
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[ CXAR41304 ]"
