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STA323W 데이터시트(PDF) 6 Page - STMicroelectronics

부품명 STA323W
상세설명  2.1 high efficiency digital audio system
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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STA323W 데이터시트(HTML) 6 Page - STMicroelectronics

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Description
STA323W
6/71
1
Description
The STA323W is a single-chip audio system comprising digital audio processing, digital
amplifier control and a DDX-power output stage. The STA323W uses all-digital amplification
to provide high-power, high-quality and high-efficiency.
The STA323W power section consists of four independent half-bridges. These can be
configured, by digital control, to operate in the following modes.
Two channels, provided by two half-bridges, and a single full-bridge giving up to
2 x 10 W + 1 x 20 W of power output.
Two channels, provided by two full-bridges, giving up to 2 x 20 W of power.
A single, parallel, full-bridge channel capable of high-current operation and giving
1 x 40W output.
The STA323W also provides a full set of digital processing features. These includes up to
four programmable 28-bit biquads (EQ) per channel, and bass and treble tone control.
Automodes™ enable a time-to-market advantage by substantially reducing the amount of
software development needed for specific functions. These includes auto volume loudness,
preset volume curves and preset EQ settings. New advanced AM radio interference
reduction modes are also provided.
The serial audio data input interface accepts all existing formats, including the I2S.
Three channels of DDX® processing are provided. This high quality conversion from PCM
audio to DDX's patented tri-state PWM switching waveform provides over 100 dB SNR and
dynamic range.
1.1
Block diagram and configurations
Figure 1.
Block diagram
Quad
half-bridge
power stage
DDX
processing
crossover,
volume, limiter
processing
Audio EQ, mix,
input, channel
mapping and
resampling
Serial data
OUT1A
Power down
OUT1B
OUT2A
OUT2B
EAPD
FAULT
TWARN
Power down
System timing
CLK
I2C
System control
SCL
SDA
LRCKI
BICKI
SDI_12


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