STA339BWS datasheet(8/79 Pages) STMICROELECTRONICS

8 / 79 page

Description

STA339BWS

8/79

DocID015276 Rev 8

Description

The STA339BWS is an integrated solution of digital audio processing, digital amplifier

controls and power output stage to create a high-power single-chip FFX digital amplifier with

high quality and high efficiency. Three channels of FFX processing are provided. The FFX

processor implements the ternary, binary and binary differential processing capabilities of

the full FFX processor.

The STA339BWS is part of the Sound Terminal® family that provides full digital audio

streaming to the speakers and offers cost effectiveness, low power dissipation and sound

enrichment.

Also provided in the STA339BWS are a full assortment of digital processing features. This

includes up to 8 programmable biquads (EQ) per channel. Available presets enable a time-

to-market advantage by substantially reducing the amount of software development needed

for functions such as audio preset volume loudness, preset volume curves and preset EQ

settings. There are also new advanced AM radio interference reduction modes. Dual-band

DRC dynamically equalizes the system to provide linear frequency speaker response

regardless of output power level. This feature separates the audio frequency band into two

sub-bands independently processed to provide better sound clarity and to avoid speaker

saturation.

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

format. The high-quality conversion from PCM audio to FFX PWM switching provides over

100 dB of SNR and of dynamic range.

Figure 1. Block diagram

Protection

current/thermal

Logic

Regulators

Bias

Power

control

FFX

PLL

Volume

control

Channel

I2S

interface

Power

Digital DSP

I2C

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