STA339BWS13TR - 2.1-Ch 40W FFX Audio Processor | STMicroelectronics
Référence : STA339BWS13TR ✓ ActifSTA339BWS13TR Présentation
A fully integrated digital power amplifier is a semiconductor system that accepts digital audio data, performs gain, volume, tone, and mixing functions, and drives loudspeaker outputs through an internal switching power stage. The STA339BWS belongs to the digital audio amplifier hierarchy, where it bridges digital signal processing and power management. Its FFX architecture is designed to improve efficiency while preserving high-fidelity audio performance in compact audio products.
Three FFX processing channels support flexible 2.1-channel system configurations. The primary output architecture can use ternary PWM operation, while the device supports three distinct power output configurations for integration into different speaker arrangements. Its 100 dB signal-to-noise ratio provides a useful indication of low-noise signal reproduction, and 96 kHz internal processing offers a higher processing rate than the 48 kHz commonly used in basic CD-rate systems.
The STA339BWS integrates digital audio processing, amplifier control, and output-stage driving in one package. This consolidation can reduce the number of separate digital-input and power-amplifier functions required in a multi-channel speaker. According to the STMicroelectronics product description, it is intended for high-power single-chip FFX digital amplification and includes thermal-overload and short-circuit protection technologies. These protections are important because speaker loads can present a sustained real-world load to the switching output stage.
Typical applications include digital active loudspeakers, 2.1-channel home-theater speaker systems, compact multimedia speakers, soundbars, automotive audio systems, and other powered-audio products requiring multiple amplified outputs. The STA339BWS13TR is especially relevant where a high processing rate, efficient power conversion, and integrated digital control must coexist within a constrained PCB area.
Designers should preserve the exposed-pad thermal path and follow the manufacturer’s recommended input, output, and power-stage layout. The exposed pad requires an uninterrupted ground connection and adequate copper area for heat removal. Speaker wiring, filter components, and power-supply routing also need to follow the reference layout to avoid excessive EMI, thermal stress, or unintended output-stage transients.
This product comparison evaluates the STA339BWS13TR against pin-compatible family alternatives, emphasizing differences in channel topology, processing, protection, and board reuse. It also identifies practical thermal and layout constraints that are essential when turning the device into a reliable, reproducible digital audio amplifier design.
Alternatives de remplacement direct pour STA339BWS13TR — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec STA339BWS13TR (même facteur de forme et même empreinte) — différant par Package, Product Type.
STA333BW
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
STA339BWS13TR Valeurs maximales et caractéristiques électriques
| Product Type | Fully integrated digital audio processor and power amplifier |
| Audio Channel Configuration | 2.1 channels |
| Rated Output Power | 40 W |
| Processing Architecture | 3 FFX processing channels |
| Internal Processing Sample Rate | 96 kHz |
| Signal-to-Noise Ratio | 100 dB |
| Supported Video Input Mode | 576 × fS |
| Power Output Configuration Count | 3 configurations |
| Primary Output Topology | 2 channels of ternary PWM |
| Maximum Supply Voltage | 21.5 V |
| Protection Features | Thermal overload and short-circuit protection |
| Boîtier | 36-BFSOP PowerSSO-36 with exposed pad |
| Package Width | 7.50 mm |
| Package Body Length | 0.295 inch |
| Type de montage | Surface mount |
| Shipping Package | Tape and reel |
Guide de configuration des broches du STA339BWS13TR tape and reel
Configuration des broches du STA339BWS13TR (boîtier tape and reel). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour STA339BWS13TR.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
STA339BWS13TR convient pour 6 applications: 2.1-Channel Home-Theater Speaker, Powered Multimedia Speaker, Digital Soundbar, Automotive Audio Amplifier, Digital Active Subwoofer, USB and Network Audio Speaker.
2.1-Channel Home-Theater Speaker
The STA339BWS13TR fits a powered home-theater speaker because it combines digital processing, amplifier control, and a 40 W-class output stage in one 36-BFSOP package. Its three FFX processing channels and three power-output configurations support left, right, and subwoofer signal paths without requiring separate digital amplifiers for every channel. At 96 kHz internal processing, the device offers greater processing headroom than a basic 48 kHz architecture. The design should configure the crossover, channel routing, limiter behavior, and gain structure in firmware, then verify continuous output into the intended speaker impedance. Because the exposed pad carries both thermal and electrical requirements, its connection to the PCB ground and copper network must follow the manufacturer layout.
Recommandé
Powered Multimedia Speaker
A compact multimedia speaker benefits from the STA339BWS13TR because the integrated FFX output stage reduces the number of separate amplifier and processing functions required on the main board. Its 2.1-channel capability supports a stereo pair plus a bass channel, while 100 dB SNR is well suited to music playback and voice reproduction in a domestic environment. The three available power-output configurations provide flexibility for balancing left, right, and subwoofer channels. Firmware should establish safe gain, clipping control, thermal margin, and crossover behavior for the actual enclosure and driver combination. Use the device’s short-circuit and thermal-overload protections as safeguards, not as substitutes for correct speaker impedance, supply design, and acoustic tuning.
Recommandé
Digital Soundbar
The STA339BWS13TR can drive multiple loudspeaker channels in a digital soundbar when the enclosure requires high-efficiency amplification close to the drivers. Its three FFX processing channels and 96 kHz internal processing provide the resources for channel mapping, volume control, tone shaping, and bass management. The 40 W system rating is useful for compact left and right speaker sections, while the configurable output architecture allows the amplifier to be adapted to the soundbar’s channel arrangement. Digital audio transport and control must be synchronized to avoid clicks or channel offsets, and all protection behavior should be validated under worst-case sustained bass loading. A soundbar’s metal enclosure can improve heat spreading, but the PCB still needs the exposed-pad copper and via structure shown in the reference layout.
Recommandé
Automotive Audio Amplifier
The STA339BWS13TR is suitable for space-constrained automotive audio designs that require a multi-channel digital power stage and integrated signal processing. The 2.1-channel architecture can support front speaker outputs plus a separate bass output, while the 40 W rating provides useful power density for compact speaker loads. Its thermal-overload and short-circuit protection are important in automotive environments, although the final product must also meet its applicable qualification and environmental requirements. Continuous speaker loading, ambient temperature, supply transients, and vibration conditions should be evaluated together. The exposed pad needs a robust thermal path to the chassis or PCB copper structure, and all digital interfaces must withstand the electrical conditions specified for the target vehicle platform.
Recommandé
Digital Active Subwoofer
The STA339BWS13TR can form the core of a digital active subwoofer because its FFX processing architecture supports efficient switching output with programmable bass management. The 96 kHz internal processing rate gives the designer additional margin for crossover filtering and digital correction, while the 100 dB SNR supports low-noise reproduction of low-frequency material. In a 2.1-channel installation, the amplifier can be coordinated with stereo channels through the system’s digital control architecture. Firmware must define phase alignment, subsonic filtering, thermal limits, and maximum excursion protection for the selected driver. Because bass content can sustain high average power, test the device with long-duration low-frequency signals and the lowest intended speaker impedance rather than relying on short music peaks.
Recommandé
USB and Network Audio Speaker
The STA339BWS13TR is useful in USB- or network-capable powered speakers where the final audio signal is processed digitally before amplification. Its digital processing and amplifier-control functions can handle gain and routing after the source codec, while the 2.1-channel output architecture suits compact stereo-plus-bass products. A system designer can use the 96 kHz internal processing rate for filtering and equalization and exploit the 40 W output class for efficient loudspeaker drive. The digital source must support the device’s required interface and sampling format, and control software should handle volume changes without producing discontinuities. Validate the design for network-control latency, unmute behavior, and sustained thermal loading in the final enclosure, while following the manufacturer’s exposed-pad and high-current layout guidance.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour STA339BWS13TR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | STA333BW |
|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics |
| Package | 36-BFSOP PowerSSO-36 EPD | 36-BFSOP PowerSSO-36 EPD |
| Product Type | Fully integrated digital audio processor | Digital audio system |
| Compatibility | STA339BWS family device | Pin and software compatible with STA339BWS |
Principaux différenciateurs
- Original 2.1-channel FFX processing architecture (vs STA333BW)
- Higher documented internal processing rate (vs STA333BW)
- Integrated digital processing and switching output stage (vs STA333BW)
Notes de conception
Treat the exposed pad as both an electrical connection and the principal thermal path. Follow the manufacturer’s recommended pad geometry, ground-copper area, and via arrangement instead of relying on the narrow perimeter leads for heat removal. Validate the assembled amplifier at the highest expected continuous output power, lowest speaker impedance, and highest ambient temperature. If the enclosure limits airflow, include its thermal resistance in the system calculation so the package does not enter thermal overload during sustained bass reproduction.
Use the manufacturer’s reference layout for the digital input, control interface, power supply, output stages, and exposed pad. Keep high-current switching loops compact and separate sensitive digital routes from output and supply paths. The power-ground and signal-ground connection strategy must match the reference design, with no arbitrary splits that redirect output return current through the digital signal ground. Confirm every net against the numbered pin-description table before releasing artwork.
Do not select output power from peak music levels alone. The 40 W rating must be reconciled with the chosen power-output configuration, speaker impedance, thermal conditions, and filter network. Exercise thermal-overload and short-circuit protection with controlled test conditions, and avoid treating protection activation as a normal operating mode. Firmware should also prevent clipping, excessive gain, and unstable bass behavior that could increase average power dissipation.
Informations de conformité
Compliance status must be confirmed against the current STMicroelectronics product documentation and the customer’s application requirements.
