STA333BW 2.1-channel high-efficiency digital audio system

The STA333BW is an integrated solution of digital audio processing, digital amplifier controls and power output stages 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 STA333BW 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.

The power section consists of four independent half-bridges. These can be configured via digital control to operate in different modes.

For example, 2.1 channels can be provided by two half-bridges and a single full-bridge, supplying up to 2 x 9 W + 1 x 20 W of output power or two channels can be provided by two full-bridges, supplying up to 2 x 20 W of output power.

The IC can also be configured as 2.1 channels with 2 x 20 W supplied by the device plus a drive for an external FFX power amplifier, such as STA533WF or STA515W.

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.

Also provided in the STA333BW are a full assortment of digital processing features. This includes up to 5 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. The DRC dynamically equalizes the system to provide a linear frequency speaker response regardless of output power level

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
Dynamic range compression (DRC) or anticlipping mode
Audio presets:
- 15 preset crossover filters
- 5 preset anticlipping modes
- Preset night-time 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 5 user-programmable biquads/channel
Three coefficients banks for EQ presets storing 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
Sub channel mix into left and right channels
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 STA335BW, STA339BW, STA339BWS, STA559BW and STA559BWS

功能框图

STA333BW 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
STA333BW	Active	1.5	1000	PowerSO 36	Tube		STA333BW

DATASHEET

下载	描述	版本	大小
STA333BW	2.1-channel 40-watt high-efficiency digital audio system Sound Terminal®	3	2288KB

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