STA32813TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STA32813TR

2.1-channel high-efficiency digital audio system

STMicroelectronics 

STA328

1

Description

Description

1.1

Overview

The STA328 comprises digital audio processing, digital amplifier control and DDX® power

output stage to create a high-power single-chip DDX® solution for high-quality,

high-efficiency, all digital amplification.

The STA328 power section consists of four independent half-bridges. These can be

configured via digital control to operate in different modes. 2.1 channels can be provided by

two half-bridges and a single full-bridge to give up to 2 x 40 W plus 1 x 80 W of power

output. Two channels can be provided by two full-bridges to give up to 2 x 80 W of power.

The IC can also be configured as a single parallel full-bridge capable of high-current

operation and 1 x 160 W output.

Also provided in the STA328 is a full assortment of digital processing features. This includes

up to four programmable 28-bit biquads (EQ) per channel and bass/treble tone control.

AutoModes enable a time-to-market advantage by substantially reducing the amount of

software development needed for certain functions. This includes auto volume loudness,

preset volume curves, preset EQ settings. New advanced AM radio-interference reduction

modes.

The serial audio data input interface accepts all possible formats, including the popular I2S

format.

Three channels of DDX® processing are provided. This high-quality conversion from PCM

audio to patented DDX® 3-state PWM switching provides over 100 dB of SNR and dynamic

range.

Figure 1. Block diagram

SDA SCL

I2C

System Contrlo

LRCKI

BICKI

SDI_12

Serial Data

Input,

Channel

Mapping &

Resampling

Audio EQ, Mix,

Crossver,

Volume, Limiter

Processing

DDX-SPIRIT

DDX ®

Processing

System Timing

PLL

CLK

TWARN

FAULT

Power-Down

Quad

Half-Bridge

Power Stage

EAPD

OUT1A

OUT1B

OUT2A

OUT2B

Figure 2. Channel signal flow diagram through the digital core

I2S

Inp ut

Channel

M ap p ing

Re-samp ling

EQ

Processing

M ix

Crossover

Filter

Volume

Limiter

4X

Interp

DDX®

DDX

Outp ut

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