STA380BWE QFN48

Sound terminal 2.1-channel high-efficiency digital audio system

The STA380BW is an integrated solution embedding digital audio processing, digital amplification and FFXTMpower output stage. It is part of the Sound Terminal®family and provides full digital audio streaming from the source to the speaker, offering cost effectiveness, low power dissipation and sound enrichment.

The STA380BW input section consists of a flexible digital input serial audio interface feeding the digital processing unit. The serial audio data input interface supports many formats, including the popular IIS format.

The STA380BW is based on an FFXTM(Fully Flexible Amplification) processor, proprietary technology from STMicroelectronics. FFXTMis the evolution of the ST ternary technology: the advanced processor is available for ternary, binary, binary differential and phase shift PWM modulation. The STA380BW embeds the ternary, binary and binary differential implementations, a subset of the full capability of the FFXTMprocessor.

The STA380BW power section consists of four independent half-bridges. These can be configured via digital control to operate in different modes. A 2.1-channel setup can be implemented with two half-bridges (L/R) together with a single full-bridge (subwoofer). Alternatively, the 2.0-channel setup can be done with two full-bridges. When using this configuration, an external amplifier for the SW channel can also be driven through the PWM output. The STA380BW is able to deliver 2 x 20 W (ternary) into an 8 Ω load at 18 V or 2 x 9 W (binary) into a 4 Ω load, plus 1 x 20 W (ternary) into an 8 Ω load at 18 V