STA381BWTR

Audio Special Purpose Overview

The STA381BWTR is a fully integrated 2.1-channel digital audio system processor from STMicroelectronics, designed for high-efficiency audio applications. It embeds digital audio processing, FFXTM power output stages, and analog outputs within a single 48-VQFN package. The device operates on a supply voltage ranging from 4.5 V to 26 V, with an absolute maximum rating of 30 V. It supports I2C control and I2S interfaces with sampling rates between 32 kHz and 192 kHz. Key electrical specifications include a 100 dB dynamic range, up to 2 x 20 W output into 8 Ω loads using ternary modulation, and dedicated headphone and line-out drivers.

Audio Special Purpose Feature Summary

• FFXTM technology providing 100 dB dynamic range and fixed PWM frequency
• Configurable output modes: 2.0 (full bridges), 2.1 (half-bridges + subwoofer full bridge), or 2.1 with external subwoofer amplifier
• Embedded dual-band DRC (STCompressorTM) and up to 12 user-programmable biquads
• Integrated protection including short-circuit, thermal, overcurrent, and undervoltage detection

Audio Special Purpose Applications

• Pre-amplifier circuits in home entertainment systems
• High-efficiency digital audio systems for flat-panel televisions
• 2.1 channel speaker setups requiring integrated DSP and amplification

Audio Special Purpose Procurement Notes

Verify component status as the STA381BW series may be discontinued. Confirm availability through authorized distributors and check for end-of-life notifications. Ensure the TR suffix matches the required tape and reel packaging format for surface mount assembly processes.

Audio Special Purpose Selection Notes

Select this component for designs requiring a complete digital-to-speaker solution with minimal external components. Consider the 48-VQFN package dimensions (7x7 mm) for PCB layout constraints. Verify that the application load impedance (4 Ω or 8 Ω) aligns with the specified power output capabilities and thermal dissipation requirements.

Audio Special Purpose Part Context

The STA381BWTR belongs to the Sound Terminal™ family of audio processors. It serves as a comprehensive solution for digital audio streaming, combining signal processing and power amplification. The 'TR' suffix indicates the device is supplied in a Tape & Reel configuration, suitable for automated surface-mount manufacturing.

Audio Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer resources for current portfolio alternatives if this specific order code is unavailable.