專賣hwd,國產ic ,sanken(三肯ic)等系列ic

general description
the hwd2138 is a monolithic integrated circuit that provides
dc volume control, and stereo bridged audio power amplifiers
capable of producing 2w into 4? (note 1) with less than
1.0% thd or 2.2w into 3? (note 2) with less than 1.0%
thd.
audio integrated circuits were designed specifically to
provide high quality audio while requiring a minimum
amount of external components. the hwd2138 incorporates a
dc volume control, stereo bridged audio power amplifiers
and a selectable gain or bass boost, making it optimally
suited for multimedia monitors, portable radios, desktop, and
portable computer applications.
the hwd2138 features an externally controlled, low-power
consumption shutdown mode, and both a power amplifier
and headphone mute for maximum system flexibility and
performance.
key specifications
n po at 1% thd+n
n into 3? (lq & mte) 2.2w (typ)
n into 4? (lq, mte, gr) 2.0w (typ)
n into 8? (mt, mte, itl, lq, & gr) 1.1w (typ)
n single-ended mode - thd+n at 85mw into
32? 1.0%(typ)
n shutdown current 0.7µa (typ)
features
n dc volume control interface
n system beep detect
n stereo switchable bridged/single-ended power amplifiers
n selectable internal/external gain and bass boost
n “click and pop” suppression circuitry
n thermal shutdown protection circuitry
applications
n portable and desktop computers
n multimedia monitors
n portable radios, pdas, and portable tvs