AP5628 is a monolithic integrated circuit, which
provides precise DC volume control, and a stereo
bridged 3 channel audio power amplifiers capable
of producing 3.0W into 4Ω with less than 10%
THD+N. The attenuator range of the volume in
AP5628 is from 20dB (DC_Vol=0V) to -80dB
(DC_Vol=3.60V) with 32 steps. The advantage of
internal gain setting can be less components and
PCB area. Both of the de-pop circuitry and the
thermal shutdown protection circuitry are
integrated in AP5628, that reduce pops and clicks
noise during power up or shutdown mode
operation. It also improves the power off pop noise
and protects the chip from being destroyed by
over temperature and short current failure.
The AP5628 uses advanced 1-wire control mode
to complete the channel select and shutdown
function.
To simplify the audio system design, AP5628
combines a stereo bridge-tied loads (BTL) mode
for speaker drive and a stereo single-end (SE)
mode for headphone drive into a single chip,
where both modes are easily switched by the
HP-IN input control pin signal.
AP5628 is available in eTSSOP20 package.