STA323W 查看數據表（PDF） - STMicroelectronics
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STA323W Datasheet PDF : 77 Pages
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Description
1
Description
STA323W
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. This 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 patented 3-state PWM switching provides over 100 dB of SNR and dynamic
range.
Figure 1. Block diagram
SDA
SCL
I2C
System control
LRCKI
BICKI
SDI_12
Serial data
input, channel
mapping and
resampling
Audio EQ, mix,
crossover,
volume, limiter
processing
DDX
processing
Quad
half-bridge
power stage
OUT1A
OUT1B
OUT2A
OUT2B
System timing
Power down
TWARN
FAULT
Power down
EAPD
CLK
Figure 2. Channel signal flow diagram through the digital core
I2S
input Channel
mapping
Re-sampling
ED
processing
Mix
Crossover Volume
filter
limiter
4x
Interpol
DDX
DDX
output
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