GENERAL DESCRIPTION
The IS31AP2145A is a 2.9W@5.0V mono, clip-less, filter-less, high efficiency Class-D audio power amplifier with automatic gain control.
The IS31AP2145A integrates AGC (Automatic Gain Control) function to automatically prevent distortion of the audio signal by which we can enhance audio quality and also protect the speaker from damage at high power levels. The AGC function and its attack time/release time are selectable via the CTRL pin. The IS31AP2145A also provides thermal and over current protection functions.

FEATURES
● Filter-less Class-D architecture
● AGC enable/disable function
● 2.9W into 4Ω at 5.0V (10% THD+N)
● Power supply range: 2.7V to 5.5V
● Selectable attack and release times
● Minimum external components
● High efficiency: 90%
● Click-and-pop suppression
● Low shutdown current: 0.1μA
● Short-circuit and thermal protection
● Space-saving UTQFN-9, 1.5mm × 1.5mm

APPLICATIONS
● Wireless or cellular handsets and PDAs
● Portable navigation devices
● Portable DVD player
● Notebook PC
● Educational toys
● USB speakers
● Portable gaming