HT4818/HT4817,pdf,datasheet (D

The HT4818/7 is a dual bridge-connected audio power amplifier which, when connected to a 5V supply, will deliver 2.2W to a 4Ωload with less than 1.0% THD+N. In addition, the headphone input pin allows the amplifiers to operate in single-ended mode when driving stereo headphones.
Boomer audio power amplifiers were designed
specifically to provide high quality output power
from a surface mount package while requiring
few external components. To simplify audio
system design, the HT4818/7 combines dual
bridge speaker amplifiers and stereo headphone
amplifiers on one chip.
The HT4818/7 features an externally controlled, low-power consumption shutdown mode, a stereo headphone amplifier mode, and thermal shutdown protection. It also utilizes circuitry to reduce “clicks and pops”during device turn-on.