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CXAR41299 is a mono smart audio power amplifier with built-in adaptive boost/AGC/temperature limit. When boosted to 7.85V by lithium battery power supply, 7W power (1% THD + N) can be continuously output under 4Ω load condition.nao嘉泰姆

CXAR41299 built-in adaptive boost can provide 5.45V, 6.45V, 7.45V, 7.85V four output voltage options to meet different output power requirements. In addition, the boost also has an adaptive function, small music signal does not boost, can greatly improve the system efficiency, extend battery life.nao嘉泰姆

Rich automatic gain control (AGC) features are built into the CXAR41299, including limiting (Limiter) and battery tracking (Battery Tracking). After the limiter function is turned on, even if the input signal is very large, the music output can be limited within the specified power and THD N. After the battery tracking function is turned on, when the battery voltage is lower than the set value, the CXAR41299 can gradually decrease with the battery voltage to limit the battery current. This can greatly extend the battery life and prevent sound breaking and excessive current demand, reduce the risk of the battery entering the locked state early when the battery is low.nao嘉泰姆

The CXAR41299 also has an automatic temperature limit control (TFB) function. When the temperature in the chip is high under the conditions of high power output and high ambient temperature, the chip can automatically reduce the system gain to prevent the chip from entering the over-temperature shutdown protection mode. Under the premise of ensuring music quality, the peak power of music is significantly improved.nao嘉泰姆

The CXAR41299 can be freely switched in multiple modes to meet more system application requirements: boost class D, boost class AB, separate class D, separate class AB.nao嘉泰姆

CXAR41299 supports hardware control mode and I²C control mode. In I²C control mode, provides a wealth of functions and parameter configuration.nao嘉泰姆

In addition, the CXAR41299's internal integrated filter-free modulation technology can directly drive the speaker. The built-in shutdown function minimizes the standby current. It also integrates functions such as output over-current protection, on-chip over-temperature protection and power supply under-voltage abnormal protection.nao嘉泰姆

   Product FeaturesReturn to Topnao嘉泰姆

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• Automatic Gain Control (AGC) with Battery Tracking and Limitingnao嘉泰姆

  -Battery tracking (Battery Tracking) function: When the battery voltage is low, the system gain is automatically reduced to extend battery lifenao嘉泰姆

  -Limiting (Limiter) function: freely select the audio limit amplitude, so that the output audio signal is limited to a fixed distortion levelnao嘉泰姆

• Built-in adaptive boostnao嘉泰姆

  -Small music signal is not boosted, which can greatly improve system efficiency and extend battery lifenao嘉泰姆

• Built-in automatic temperature limit control functionnao嘉泰姆

  -Especially suitable for boost 7.85V D class, boost class AB state and high ambient temperature, significantly improve the peak power of musicnao嘉泰姆

• Quiescent current: 4.0mA, 3.6Vnao嘉泰姆

• Efficiency: 88%(V_BAT= 4.2V, R_L= 4Ω 22uH, Po = 0.6W)nao嘉泰姆

• THD+N：0.02%（V_BAT= 3.6V, R_L= 4Ω 22uH, Po = 0.5W, Class D)nao嘉泰姆

• Flexible configuration: choice of hardware or I²C control modenao嘉泰姆

• Powernao嘉泰姆

  -Boost input V_BAT: 2.8V to 5.0Vnao嘉泰姆

  -Boost output V_POUTVariety of options: 5.45V, 6.45V, 7.45V, 7.85Vnao嘉泰姆

• Output powernao嘉泰姆

  3.4 W (V_BAT=4.2V, V_POUT= 5.45V, R_L=4Ω,THd+N=1%nao嘉泰姆

  4.7 W (V_BAT=4.2V, V_POUT= 6.45V, R_L=4Ω,THd+N=1%nao嘉泰姆

  6.2 W (V_BAT=4.2V, V_POUT= 7.45V, R_L=4Ω,THd+N=1%nao嘉泰姆

  7.0 W (V_BAT=4.2V, V_POUT= 7.85V, R_L=4Ω,THd+N=1%nao嘉泰姆

• Two gain options: 25dB, 30dB; I²Maximum support for 80-step volume adjustment in C control modenao嘉泰姆

• Multiple modes available: Boost Class D, Boost Class AB, Class D alone, Class AB alonenao嘉泰姆

• Protection function: overcurrent/overheating/undervoltage abnormal protection functionnao嘉泰姆

• Lead-free and halogen-free package, TSSOP20L-PPnao嘉泰姆

   Scope of applicationReturn to Topnao嘉泰姆

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• Bluetooth Speaker/Wi-Fi Speakernao嘉泰姆

• Portable speakernao嘉泰姆

• 2.1 channel small speaker rod speakernao嘉泰姆

• iphone/ipod/ipod docking nao嘉泰姆

• MP4, Navigatornao嘉泰姆

• Tablet PC, Laptopnao嘉泰姆

• Smartphonenao嘉泰姆

• Small size LCD TV/monitornao嘉泰姆

• portable game machinenao嘉泰姆

   Technical Specification (Product PDF)Return to Top nao嘉泰姆

If you need detailed PDF specifications, please scan WeChat and contact us. You can also get free samples and technical support.!nao嘉泰姆
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   Product packaging diagramReturn to Topnao嘉泰姆

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   Circuit schematicReturn to Topnao嘉泰姆

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  Related Chip Selection GuideReturn to Topnao嘉泰姆