The HAA9811 is a capacitive boost, crack-proof, Class AB/D switchable mono audio power amplifier that provides up to 6.5W continuous output for 3Ω loads.
     HAA9811 built-in unique anti-crack function, can automatically adjust the power amplifier gain according to the size of the output signal, prevent the output clipping distortion, to achieve a more comfortable hearing experience, HAA9811 also has a dynamic boost function, when the input signal is very small charge pump does not boost the voltage, to reduce power consumption and improve efficiency for through mode; Charge pump boost is started when the input signal is large and a larger dynamic range is needed to achieve a perfect balance between efficiency and output power.
    The HAA9811's fully differential input architecture and extremely high PSRR effectively improve the HAA9811's ability to suppress RF noise.
HAA9811 has a very low turn-off current, greatly extending the standby time of the system. The OCP, OTP, and UVLO protection functions enhance system reliability. Turning POP-click suppression on and off improves the auditory perception of the system and simplifies system debugging.
    The HAA9811 is available in an ESOP10L package with heat sink.

Class AB and Class D switching function
4 kinds of anti-crack sound can be selected
Dynamic current limiting function, current limiting range 1.4A to 3A adaptive adjustment
Adaptive boost function, Charge_pump boost to 6.6V
Class D output power:

    －5.8W (VDD=4.2V, RL =4Ω，NCN OFF THD+N=10%)

    －6.5W (VDD=4.2V, RL =3Ω，NCN OFF THD+N=10%)

Class AB output power:

    －2W (VDD=4.2V, RL =4Ω，升压关闭 THD+N=10% )

    －2.7W (VDD=4.2V, RL =3Ω，升压关闭 THD+N=10% )

Operating voltage: 2.8V to 5.5V
Low distortion and noise
Enable or disable the POP-click suppression function
Turn-off current (<1uA)
OCP, OTP, and UVLO protection functions
The HAA9811 is available in an ESOP10L package with heat sink

megaphone
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