The Intersil ISL54004 device is an integrated audio power amplifier system that combines a mono BTL amplifier and
stereo headphone amplifiers in a single device. It can operate
from a single +2.7V to +5V power supply and is offered in a
20 Ld 4x4 TQFN package. Targeted applications include
handheld equipment such as cell-phones, MP3 players, and
games/toys.
The ISL54004 part contains one class AB BTL type power
amplifier for driving an 8Ω mono speaker and two class AB
headphone amplifiers for driving 16Ω or 32Ω headphone
speakers.
The BTL when using a 5V supply is capable of delivering
800mW (typ) with 0.4% THD+N and 941mW (typ) with 1%
THD+N of continuous average power into an 8Ω BTL speaker
load.
Each headphone amplifier when using a 5V supply is capable
of delivering 50mW (typ) with 0.3% THD+N and 94mW (typ)
with 1% THD+N of continuous average power into a 32Ω headphone speaker.