This manual introduces STA333BW, a 2.1-channel 40-watt high-efficiency digital audio system. It has a wide supply voltage range, it can work between 4.5V and 21.5V. It has three power output configurations: 2 channels of ternary PWM (2 x 20W into 8 Ω at 18V) + PWM output; 2 channels of ternary PWM (2 x 20W into 8 Ω at 18V) + ternary stereo line-out; 2.1 channels of binary PWM (left, right, LFE) (2 x 9W into 4 Ω +1 x 20W into 8 Ω at 18V), and features 100-dB SNR and dynamic range FFX, 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, 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-pass filter.
The STA333BW is an integrated solution combining digital audio processing, amplifier controls, and power output stages to create a high-power single-chip FFX digital amplifier. It features three channels of FFX processing with ternary and binary capabilities, delivering up to 40 watts of output power depending on the configuration. The device supports a wide supply voltage range of 4.5 V to 21.5 V and includes advanced features like FFX with 100-dB SNR, dynamic range compression, and various audio presets.
| Supply voltage range | 4.5 V to 21.5 V |
|---|---|
| Output power (2 channels) | 2 x 20 W into 8 Ω at 18 V |
| Output power (2.1 channels) | 2 x 9 W into 4 Ω + 1 x 20 W into 8 Ω at 18 V |
| SNR and dynamic range | 100-dB |
| Input sample rates | 32- to 192-kHz |
| Digital gain/attenuation range | +48 dB to -80 dB |
| Package type | PowerSSO-36 with exposed pad down (EPD) |
The device supports a wide-range supply voltage from 4.5 V to 21.5 V.
Yes, it includes an I2S input data interface.
The device has a 96-kHz internal processing sample rate.