STA369BW datasheet(10/88 Pages) STMICROELECTRONICS

10 / 88 page

Description

STA369BW

10/88

Doc ID 022033 Rev 1

Description

The STA369BW 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, and all-digital amplification.

The STA369BW is based on an FFX (fully flexible amplification) processor, a proprietary

technology from STMicroelectronics. FFX is the evolution and the enlargement of ST’s

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

differential and phase-shift PWM modulation schemes.

The STA369BW contains the ternary, binary and binary differential implementations, a

subset of the full capability of the FFX processor.

The STA369BW 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 STA369BW 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 15 W + 1 x 30 W of music output

power, by using standard 4 and 8

Ω speakers. Two channels can be provided by two full-

bridges, providing up to 2 x 30 W, by using standard 8

Ω speaker at 22 V. The IC can also be

configured as 2.1 channels with 2 x 30 W provided by the device and external power for FFX

power drive. Please refer to the package thermal characteristics and application

suggestions for more details.

Also provided in the STA369BW are a full assortment of digital processing features. This

includes up to 8 programmable biquads (EQ) per channel. Special digital signal processing

techniques are available in order to manage low-frequency quantization noise in case of

very low frequency cutoff filter thresholds. The coefficient range -4..4 allows the easy

implementation of high shelf filters. Available presets allow the advantage of earlier time-to-

market 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. The dual-

band DRC dynamically equalizes the system to provide speaker linear frequency response

regardless of output power level. This feature independently processes the two bands,

controlling dynamically the output power level in each band, thus providing better sound

clarity.

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.

STA369BW Datasheet(PDF) 10 Page - STMicroelectronics

STA369BW Datasheet(HTML) 10 Page - STMicroelectronics

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