STA339BWS 2.1 channel high efficiency digital audio system

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.

技术特性

Wide-range supply voltage, 4.5 V to 21.5 V
Three power output configurations:
- 2 channels of ternary PWM (2 x 20 W into 8 Ω at 18 V) + PWM output
- 2 channels of ternary PWM (2 x 20 W into 8 Ω at 18 V) + ternary stereo line-out
- 2.1 channels of binary PWM (left, right, LFE) (2 x 9 W into 4 Ω +1 x 20 W into 8 Ω at 18 V)
FFX with 100-dB SNR and dynamic range
Scalable FFX modulation index
Selectable 32- to 192-kHz input sample rates
I²C control with selectable device address
Digital gain/attenuation +48 dB to -80 dB with 0.5-dB/step resolution
Soft volume update with programmable ratio
Individual channel and master gain/attenuation
Two independent DRCs configurable as a dual-band anticlipper (B2DRC) or as independent limiters/compressors
EQ-DRC for DRC based on filtered signals
Dedicated LFE processing for bass boosting
Audio presets:
- 15 preset crossover filters
- 5 preset anticlipping modes
- Preset nighttime listening mode
Individual channel soft/hard mute
Independent channel volume and DSP bypass
I2S input data interface
Input and output channel mapping
Automatic invalid input-detect mute
Up to 8 user-programmable biquads/channel
Three coefficient banks for storing EQ presets with fast recall via I²C interface
Bass/treble tones and de-emphasis control
Selectable high-pass filter for DC blocking
Advanced AM interference frequency switching and noise suppression modes
Selectable high- or low-bandwidth noise-shaping topologies
Selectable clock input ratio
96-kHz internal processing sample rate
Thermal overload and short-circuit protection technology
Video apps: 576 x fSinput mode supported
Pin and SW compatible with STA333BW, STA339BW, STA559BW and STA559BWS

功能框图

STA339BWS 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
STA339BWS	Active	2.0	1000	PowerSSO 36	Tube	-20 °C-150 °C	STA339BWS
STA339BWS13TR	Active	2.0	1000	PowerSSO 36	Tape And Reel	-20 °C-150 °C	STA339BWS13TR

DATASHEET

下载	描述	版本	大小
STA339BWS	DS6016: 2.1-channel 40-watt high-efficiency digital audio system Sound Terminal®	5	2360KB

APPLICATION NOTES

下载	描述	版本	大小
AN3340	AN3340: Loudspeaker characterization and compensation	1	3944KB
AN3984	AN3984: IIR filter design equations for Sound Terminal® devices	1	494KB