FEATURE
?4 modes of Non-Clip output control Function
?Adaptive Charge Pump Regulator
?Fixed Voltage Gain: 28dB
?Output Power
6.0W (VBAT=4.2V, RL=4?, THD+N=10%)
5.0W (VBAT=3.6V, RL=4?, THD+N=10%)
?Efficiency
90% (VBAT = 3.6V, RL = 4 ?, Po = 1.0W)
80% (VBAT = 3.6V, RL = 4 ?, Po = 2.0W)
?Power Supply
-Input VBAT：2.5V to 5.5V
-Output CPOUT：6.5V
?Quiescent Current: 3mA
?Shutdown Current: <1uA
?Class AB / Class D selectable
?Filter-less Modulation, Eliminating Output Filter
?Over Current Protection, Thermal Protection,
Low voltage malfunction prevention function
included
?Pb-Free Packages , ESOP10
? APPLICATIONS
?Smart Speakers ?Wireless Speakers
?Portable Audio Devices ?Smart Phones
? GENERAL DESCRIPTION
SC2303 is a Class D audio amplifier which can deliver continuous 5.0W output power
into a 4Ω speaker with 3.6V battery supply when THD+N =
10%. The class D audio amplifier’s power supply is
adaptively boosted by the integrated charge pump
regulator ;which only works while the output power
is big enough. This will significantly extend the
playing time ;in battery supply applications.
SC2303 features Non -Clip output control Function
which detects output signal clip due to the over
input signal and suppresses the output signal clip
automatically. Also, it can adapt the output clip
caused by power supply voltage down. It can
significantly improve the sound quality, creating a
very comfortable musical enjoyment, and to protect
the speakers from overload damage. It also
provides NCN OFFmode.
Class AB amplifier mode is also available for
SC2303. Once the EMI Interference from class D
and Boost Converter becomes an ; annoying
problem, SC2303 can be changed into Class AB
mode.
SC2303 has a filter-less modulation circuit
which directly drives speakers while realizes ;low
distortion and low noise characteristics. Thanks to
filter-less, circuit design with fewer external parts
can ;be made in portable applications.
SC2303 has an internal gain of 28dB and an
independent Shutdown function which can
minimize the power consumption. As for protection
function, over current protection function for
speaker output terminals, over ; temperature
protection function, and low supply voltage
malfunction preventing function are also prepared.
? TYPICAL APPLICATION
