AD51040-3.5W Mono Filter-less Class-AB/D Audio Amplifier DataSheet 

Description
    The AD51040 is a high-efficiency, high-quality
mono audio amplifier which can operate in Class-D
or Class-AB mode.
    The non-crack-noise (NCN) function is enabled to
prevent output signal from distortion when the input
signal exceeds a threshold level. The power-limit
control can provide further limit output power level of
amplifier. All these functions are performed
automatically.
    AD51040 features two control modes, controlled
by a one-wire pulse signal, to achieve different
speaker driving mode.
    AD51040 is available in MSOP-8L and WLCSP-9L packages.

Features
􀁺 Supply voltage range: 2.5 V to 5.5 V
􀁺 Class-D and Class-AB speaker driver modes
􀁺 Static operation current:
􀂄 Class-D mode: 4.0mA / 5V
􀂄 Class-AB mode: 4.9mA / 5V
􀁺 Shutdown current: <1uA
􀁺 Loudspeaker peak power from 5V supply:
􀂄 Class-D mode:
􀂋 3.5W @ 4Ω, Po,10% THD+N
􀂋 2.9W @ 4Ω, Po,1% THD+N
􀂄 Class-AB mode:
􀂋 3.0W @ 4Ω, Po,10% THD+N
􀂋 2.2W @ 4Ω, Po,1% THD+N
􀁺 EMI reduction
􀁺 Power-limit control
􀁺 Non-Crack-Noise (NCN) Function
􀁺 Pop noise and click noise reduction
􀁺 High-efficiency: 93% ( 3.6V / 8ohm / 0.8W / Class-D mode)
􀁺 Protection function
􀂄 Under-Voltage detection
􀂄 Short-Circuit protection
􀂄 Over temperature protection
􀂄 DC output detection
􀁺 Space-Saving 1.34mm x 1.44mm WLCSP-9L

Applications
􀁺 Portable Multimedia Devices
􀁺 Mobile Phones
􀁺 GPS
􀁺 Notebook computer