STA335W datasheet(4/43 Pages) STMICROELECTRONICS

4 / 43 page

Description FFX

STA335W

4/43

Description FFX

The STA335W is an integrated solution of digital audio processing, digital amplifier control,

and FFX -power output stage, thereby creating a high-power single-chip FFX solution

comprising high-quality, high-efficiency, all digital amplification.

STA335W is based on FFX (Full Flexible Amplification) processor.

The STA335W is part of the Sound TerminalTM family that provides full digital audio

streaming to the speaker, offering cost effectiveness, low power dissipation and sound

enrichment.

The STA335W power section consists of two full-bridges. The two channels can provide up

to 2 x 20 W of power.

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

format. Two channels of FFX processing are provided. This high-quality conversion from

PCM audio to FFX PWM switching waveform provides over 100 dB SNR and dynamic

range.

1.1

Block diagram

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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