STA3398 datasheet(10/77 Pages) STMICROELECTRONICS

10 / 77 page

Description

STA339BW

10/77

Doc ID 15251 Rev 5

Description

The STA339BW 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.

STA339BW is based on FFX (fully flexible amplification) processor, a STMicroelectronics

proprietary technology. FFX is the evolution and the enlargement of the ST ternary

technology: the new processor can be configured to work in ternary, binary, binary

differential and phase shift PWM modulation schemes.

STA339BW contains the ternary, binary and binary differential implementations, a subset of

the full capability of the FFX processor.

The STA339BW is part of the Sound Terminal™ family that provides full digital audio

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

enrichment.

The STA339BW 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, providing up to 2 x 9 W + 1 x 20 W of power output.

Two channels can be provided by two full bridges, providing up to 2 x 20 W of power. The IC

can also be configured as 2.1 channels with 2 x 20 W provided by the device and external

power for FFX power drive.

Also provided in the STA339BW are a full assortment of digital processing features. This

includes up to 8 programmable 28-bit biquads (EQ) per channel and bass/treble tone

control. Available presets enable a time-to-market advantage by substantially reducing the

amount of software development needed for certain functions. This includes 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 speaker linear frequency response regardless output power level.

This feature independently processes the two bands, controlling, dynamically, the output

power level in each band and so providing a better sound quality.

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

format. Three 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.

STA3398 Datasheet(PDF) 10 Page - STMicroelectronics