STA369BWSTR - 40W 2.1-Ch Digital Audio Amplifier | STMicroelectronics
MPN： STA369BWSTR ✓ 啟用中STA369BWSTR 概覽
A digital audio amplifier, also called a class-D amplifier, converts digital audio signals directly into high-efficiency speaker drive. The STA369BW belongs to the Sound Terminal family of integrated digital audio processors and uses STMicroelectronics FFX, or fully flexible amplification, technology. This integration reduces the number of discrete signal-chain and output-stage components required in a compact multimedia or home-audio system.
The principal system characteristics include 2.1-channel operation, a 40 W output capability, digital audio processing, digital amplifier control, and an integrated FFX power stage. The 21.5 V maximum supply listed for the device accommodates higher-voltage power-amplifier operating environments, while the 4.5 V minimum supply supports lower-voltage system rails. Users must still verify load, thermal, and supply limits against the manufacturer application guidance for the selected channel configuration.
Architecturally, the device places signal processing, amplifier control, and power conversion into a single package. This integrated approach can shorten the audio path and simplify board design compared with a discrete codec, DSP, modulator, and output-stage architecture. Its exposed-pad package also provides a direct thermal path from the power stage to the PCB, making copper-plane layout and thermal management essential in higher-output designs.
Typical uses include compact home-theater systems, active speakers, multimedia monitors, soundbars, and other 2.1-channel consumer-audio products. The device is particularly relevant where a high-power subwoofer channel and two additional speaker channels share a controlled digital audio system. Host-controller integration allows system audio settings and amplifier behavior to be managed electronically.
For implementation, follow the manufacturer datasheet for the exposed-pad connection, power-supply decoupling, digital input routing, speaker configuration, and thermal layout. Allow adequate copper around the exposed pad and use the specified input and output filtering networks to preserve signal quality, limit EMI, and maintain stable amplification.
This product overview organizes the key operating data, drop-in replacement candidates, application guidance, and PCB design cautions into one engineering reference. It also identifies where package-specific pin assignments and secondary electrical parameters must be confirmed in the manufacturer datasheet before release to production.
直接替換替代品，適用於 STA369BWSTR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
STA369BWS
✅ 直接替換📋 參考替代品（不在目錄中）
STA369BWSTR 最大額定值與電氣特性
| Product Type | Fully integrated digital audio amplifier processor |
| Channel Configuration | 2.1 channels |
| Maximum Output Power | 40 W |
| Supply Voltage Range | 4.5 V to 21.5 V |
| Amplification Technology | FFX fully flexible amplification |
| Digital Audio Processing | Integrated |
| Digital Amplifier Control | Integrated |
| Power Output Stage | Integrated FFX power stage |
| 封裝 | 36-pin PowerSSO with exposed pad |
| Package Pin Count | 36 pins |
| Product Family | Sound Terminal |
| 安裝類型 | Surface mount |
| Manufacturer | STMicroelectronics |
STA369BWSTR 36 pins 腳位配置指南
STA369BWSTR（36 pins 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： STA369BWSTR.
請參閱 資料表 以查看完整腳位配置。
典型應用
STA369BWSTR 適用於 6 應用s: 2.1-Channel Home Theater System, Compact Active Speaker, Multimedia Soundbar, Digital Active Subwoofer, Digital Audio Reference Monitor, Automotive or Industrial Digital Audio Module.
2.1-Channel Home Theater System
The STA369BWSTR fits compact home-theater systems requiring two main speaker channels and a dedicated subwoofer channel. Its 2.1-channel architecture supports up to 40 W output, while integrated digital audio processing and FFX power amplification reduce the component count compared with a separate DSP, digital modulator, and output-stage design. The 4.5 V to 21.5 V supply range accommodates different system rails. Design the exposed-pad region with substantial copper for heat removal, and confirm speaker impedance, protection behavior, and output filtering in the manufacturer application circuit.
推薦
Compact Active Speaker
The STA369BWSTR can form the digital amplification core of an active bookshelf or multimedia speaker when the system accepts digital audio and benefits from a compact power-amplifier solution. Its integrated processing, digital amplifier control, and power stage reduce board area and external circuitry. The 40 W capability is useful for louder room-filling output, but actual continuous power must be evaluated with the chosen supply voltage and speaker impedance. Use the exposed pad as a deliberate thermal structure and follow the reference output-filter and grounding layout to minimize distortion and EMI.
推薦
Multimedia Soundbar
For a multimedia soundbar, the STA369BWSTR provides a path toward consolidated 2.1-channel amplification with up to 40 W output. Integrating digital processing and the FFX output stage can reduce the number of boards and interconnects in a space-constrained enclosure. The wide 4.5 V to 21.5 V supply range supports integration with system power rails, although a quiet, stable supply and correct sequencing are still required. Place input and output filtering as specified, maintain short high-current paths, and provide uninterrupted copper beneath the exposed pad for predictable thermal performance.
推薦
Digital Active Subwoofer
The STA369BWSTR can support an active subwoofer or mixed 2.1-channel architecture where digital control and efficient power conversion are valuable. Its integrated digital processing allows the host system to manage amplification behavior electronically, while the FFX stage supports high-power audio output from a compact package. The 21.5 V upper supply limit provides headroom for appropriately designed power rails, but the regulator must prevent transients above that limit. Thermal copper, speaker-load protection, and the manufacturer output network are critical for reliable continuous operation.
推薦
Digital Audio Reference Monitor
The STA369BWSTR is suitable for a digital reference monitor or powered studio-style speaker where a 2.1-channel system and efficient amplification are required. Digital processing integrated with the output stage reduces analog-chain complexity and supports host-managed volume, EQ, or protection functions when the appropriate control interface is used. The device’s 40 W capability should be matched against the monitor sensitivity, enclosure volume, and amplifier topology to avoid overdriving the transducer. Follow the manufacturer reference layout for filtering, grounding, decoupling, and exposed-pad thermal management.
推薦
Automotive or Industrial Digital Audio Module
The STA369BWSTR can be evaluated for custom digital-audio modules used in industrial control cabinets, interactive terminals, or automotive entertainment systems where a 2.1-channel speaker arrangement is needed. Its integrated processor and FFX output stage simplify the amplifier subsystem, while the 4.5 V to 21.5 V range supports multiple supply architectures. Qualification for a finished vehicle or harsh industrial environment requires separate environmental, quality, and application review. Use the manufacturer order information and datasheet to confirm the exact temperature grade before production release.
推薦
推薦產品摘要
工程參考資料，適用於 STA369BWSTR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | STA369BWS |
|---|---|---|
| Package | 36-pin PowerSSO with exposed pad | 36-pin PowerSSO with exposed pad |
| Brand | STMicroelectronics | STMicroelectronics |
| Channel Configuration | 2.1 channels | 2.1 channels |
| Maximum Output Power | 40 W | 40 W |
| Amplification Architecture | Integrated FFX digital power stage | Integrated FFX digital power stage |
| Digital Audio Processing | Integrated | Integrated |
| Digital Amplifier Control | Integrated | Integrated |
主要差異化特點
- Integrated 2.1-channel digital audio signal path (對比STA369BWS)
- Single-chip processing and FFX output integration (對比STA369BWS)
- Broad supply-voltage operating window (對比STA369BWS)
設計說明
Treat the STA369BWSTR exposed pad as the principal thermal path for the integrated FFX output stage. Extend a continuous copper region beneath and around the pad, add thermal vias according to the manufacturer land pattern, and avoid placing a temperature-sensitive assembly directly beneath the package. Validate junction-temperature margin using the final enclosure airflow, ambient temperature, supply voltage, and speaker load.
Place the input and output network components close to their corresponding package pins, with the shortest practical return paths to ground. Keep high-current output and supply-current paths wide and direct, while separating sensitive digital audio routing from switching-node and power-converter areas. Follow the exact exposed-pad geometry, pin numbering, and component placement shown in the manufacturer application circuit.
Use a quiet supply for the audio and logic rails, and decouple the package close to its power pins with the capacitance and ESR characteristics specified by STMicroelectronics. Account for startup sequencing, supply transients, and the 21.5 V maximum rating. Star-point grounding or a carefully partitioned ground arrangement can help prevent output current from coupling into digital-audio references.
Do not infer a pin function from a similar PowerSSO package or rely on a generic cross-reference table. Verify every numbered terminal and the exposed-pad connection against the STA369BW manufacturer datasheet. Likewise, do not treat functionally similar amplifiers as drop-in replacements unless their package, electrical limits, control interface, and filter requirements have been compared explicitly.
合規資訊
Compliance status must be confirmed for the exact order code and current manufacturer declarations.
