The HAA9003 is a differential input Class G audio power amplifier with 4 operating modes, providing 2W output power for 8Ω speakers in a 4.2V lithium battery powered state.
    The HAA9003's differential input architecture and extremely high PSRR effectively improve the HAA9003's ability to suppress RF noise. The filter-free PWM modulation structure and gain built-in approach reduce external components, PCB area and system costs, and simplify design.
    HAA9003 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 HAA9003 is available in a QFN20(3mm x 3mm) package

4 working modes are available
One line pulse control mode selection mode
Automatic gain control (ALC) eliminates crackle
Output power:

  -2W (VDD=4.2V, RL =8Ω，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

Tablet, voice assistant
Watches, wristbands, cell phones