HAA9801 Description:
    The HAA9801 is a capacitive boost, crack-proof, Class AB/D switchable mono audio power amplifier that provides up to 5.8W continuous output power for 3Ω loads.
    HAA9801 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, HAA9801 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 the direct-pass mode; When the input signal is large and a larger dynamic range needs to be provided, the charge pump boost is started to achieve a perfect balance between efficiency and output power.
    The HAA9801's fully differential input architecture and extremely high PSRR effectively improve the HAA9801's ability to suppress RF noise.
    HAA9801 has a very low turn-off current, which greatly extends the standby time of the system. OCP, OTP, UVLO protection enhances system reliability. Turning POP-click suppression on and off improves the sound and feel of the system and simplifies system debugging.
    The HAA9801 is available in an ESOP16 package with heat sink

Class AB and Class D switching function
4 kinds of anti-crack sound can be selected
Adaptive boost function, Charge_pump boost to 6.6V
Supports 3 Ohm load
Class D output power:

 －5.8W (VDD=4.2V, RL =3Ω，NCN OFF THD+N=10%)

 －5.3W (VDD=4.2V, RL =4Ω，NCN OFF THD+N=10%)

Class AB output power:

  -2.4W (VDD=4.2V, RL =3Ω, booster off THD+N=10%)
  -1.9W (VDD=4.2V, RL =4Ω, booster off 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 HAA9801 is available in an ESOP16 package with heat sink

megaphone
Portable speaker/card speaker
Bluetooth speaker /AI speaker