STA323W datasheet(6/71 Pages) STMICROELECTRONICS

6 / 71 page

Description

STA323W

6/71

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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