STA559BWSTR - 5V 2A 2.1-Channel Digital Amplifier | ST
Référence : STA559BWSTR ✓ ActifSTA559BWSTR Présentation
A digital audio amplifier, also called a class-D audio amplifier, converts digital audio signals into high-efficiency power-stage drive signals. This product type sits within the hierarchy of audio amplifiers, digital signal processing ICs, signal-chain ICs, and semiconductor solutions. Integrating the processor and output stage reduces the number of discrete components required in a typical powered-speaker design while preserving a compact system architecture.
The STA559BWSTR supports 2.1-channel audio operation, combining two main channels with a subwoofer channel in compatible stereo-plus-subwoofer systems. Its 5 V supply and 2 A output rating are suited to space-constrained consumer equipment where power density and board area are important. The integrated digital processor also handles bass and treble functions identified in the product documentation.
The STA559BW is described by STMicroelectronics as an FFX digital amplifier solution. Its architecture integrates digital audio processing, digital amplifier controls, and the power output stage rather than relying on separate control and amplification blocks. This consolidation supports shorter signal paths and reduces the component count, although final acoustic performance still depends on speaker impedance, filter selection, supply design, PCB layout, and thermal implementation.
Typical uses include compact stereo systems, home-theater speaker combinations, active subwoofer designs, and multimedia audio equipment requiring a 2.1-channel output configuration. The device is particularly relevant when the enclosure space available for heat dissipation is limited and a single IC can control multiple amplified outputs more efficiently than a collection of separate analog power amplifiers.
Power delivery and grounding require careful implementation. Follow the manufacturer datasheet when selecting input and output filters, setting the digital interface, configuring channel gain, and connecting the exposed pad. The exposed-pad package is intended for surface mounting and should be coupled to an appropriately sized ground plane to improve heat transfer without compromising acoustic or electromagnetic performance.
This product overview combines the manufacturer-defined device function, package information, and electrical highlights with practical integration guidance. It also identifies design trade-offs and application-specific usage patterns that help engineers determine whether a fully integrated digital audio amplifier matches their enclosure, speaker, interface, and thermal requirements.
Alternatives de remplacement direct pour STA559BWSTR — 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 STA559BWSTR (même facteur de forme et même empreinte) — différant par Package.
STA559BW
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
STA559BW13TR
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →STA559BWSTR Valeurs maximales et caractéristiques électriques
| Product Type | Fully integrated digital audio processor and amplifier |
| Manufacturer | STMicroelectronics |
| Tension d'alimentation | 5 V |
| Output Current | 2 A |
| Channel Configuration | 2.1 channels |
| Main Output Channels | 2 channels |
| Architecture | FFX digital amplifier |
| Integrated Functions | Digital audio processing, digital amplifier controls, and power output stage |
| Signal Processing | Bass and treble functions |
| Boîtier | PowerSSO-36 EPD |
| Nombre de broches | 36 pins |
| Type de montage | Surface mount |
Guide de configuration des broches du STA559BWSTR powersso-36 epd
Configuration des broches du STA559BWSTR (boîtier powersso-36 epd). 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 STA559BWSTR.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
STA559BWSTR convient pour 6 applications: Compact Home-Theater Speaker, Powered Multimedia Speaker, Active Subwoofer and Stereo Combination, Digital Audio Source System, Portable Speaker, Compact Gaming Audio System.
Compact Home-Theater Speaker
The STA559BWSTR fits a compact 2.1-channel home-theater speaker requiring 5 V operation and integrated digital signal processing. Its two main channels plus subwoofer channel allow the amplifier electronics to remain close to the speaker drivers, reducing interconnects and conserving enclosure volume. The integrated processor, controls, and output stage simplify the signal chain compared with a separate DSP and multiple amplifier blocks. Designers must still select channel filters, confirm speaker impedance, and provide the exposed-pad copper area required for heat dissipation.
Recommandé
Powered Multimedia Speaker
A powered multimedia speaker can use the STA559BWSTR to provide a compact 2.1-channel output from a 5 V supply. Integrating digital audio processing with the power output stage reduces the number of functional blocks that must be placed beside the drivers. The 2 A output-current rating is a central design constraint, so the final speaker load and filter network must be checked against the device limits. PCB planning should prioritize short output-current paths, stable supply decoupling, and effective cooling from the PowerSSO exposed pad.
Recommandé
Active Subwoofer and Stereo Combination
The STA559BWSTR is suited to an active speaker combining two full-range channels with a subwoofer channel. Its 2.1-channel organization supports a single integrated amplification solution while keeping digital bass and treble processing within the amplifier hardware. This can simplify control routing compared with independent amplifier modules. Crossover design remains essential because the integrated processor does not eliminate the need to select filters that match the driver set and intended acoustic response. Verify power, impedance, and thermal requirements before releasing the production layout.
Recommandé
Digital Audio Source System
The STA559BWSTR can serve as the output stage of a compact digital audio source system when the system architecture aligns with its digital processing, control, and 2.1-channel capability. Consolidating these blocks can lower board complexity compared with separate processor and output-stage designs. The 5 V operating requirement makes supply-headroom planning important, particularly when the source and amplifier share a common rail. Interface timing, control configuration, and filter settings must be validated together so that the integrated architecture does not constrain source compatibility.
Recommandé
Portable Speaker
A portable speaker can benefit from the STA559BWSTR when its enclosure uses a 5 V rail and requires two amplified channels plus a subwoofer function. Integrating the signal-processing and output functions supports a compact board arrangement, which is important when size and weight constrain the design. Battery-powered implementations must account for supply conversion losses and available output-current headroom. The PowerSSO layout should be evaluated thermally at the highest sustained channel-load condition, and acoustic testing should confirm that the chosen bass and treble settings suit the enclosure.
Recommandé
Compact Gaming Audio System
The STA559BWSTR can support a compact gaming speaker or gaming audio hub configured for 2.1-channel playback. A single integrated processor and output device can reduce board area while providing channel-specific digital processing and a 2 A output rating. The design must maintain signal integrity between the digital source, processing section, and power stage, particularly around the package supply pins and exposed pad. Firmware or control configuration should be validated for the selected source interface, and thermal testing should cover sustained high-volume playback.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour STA559BWSTR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | STA559BW | STA559BW13TR |
|---|---|---|---|
| Package | PowerSSO-36 EPD | PowerSSO-36 EPD | PowerSSO-36 EPD |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Product Type | Fully integrated digital audio processor and amplifier | STA559BW digital audio amplifier family | STA559BW digital audio amplifier family |
| Channel Configuration | 2.1 channels | 2.1-channel family configuration | 2.1-channel family configuration |
| Integrated Functions | Digital audio processing, digital amplifier controls, and power output stage | Digital processing and power output family | Digital processing and power output family |
| Signal Processing | Bass and treble functions | Bass and treble family functions | Bass and treble family functions |
| Architecture | FFX digital amplifier | FFX digital amplifier family | FFX digital amplifier family |
| Pin Count | 36 pins | 36 pins | 36 pins |
Principaux différenciateurs
- Single-chip 2.1-channel signal chain (vs STA559BW)
- Established 36-pin PowerSSO EPD package association (vs STA559BW13TR)
- Integrated digital processing and amplification (vs STA559BW)
Notes de conception
Route the PowerSSO exposed pad into a substantial ground-copper region with thermal vias as directed by the manufacturer layout guidance. Evaluate dissipation using the actual 2.1-channel load and supply voltage rather than nominal output-current capability alone. Sustain high-volume playback during thermal testing and verify that the exposed-pad construction keeps junction temperature within the device rating.
Keep the digital input, control, and power connections away from sensitive audio references while maintaining the filter connections required by the STMicroelectronics reference circuit. Place input, output, and bypass capacitors according to the datasheet guidance rather than relying on generic amplifier-layout conventions. Verify every footprint, exposed-pad connection, and pin numbering against the exact STA559BWSTR ordering information.
Design the 5 V supply path for both average audio demand and the transient current generated by the digital output stage. Use short, wide supply connections and place the required local capacitors close to the device pins. Confirm that the source can support the selected 2 A operating point and that shutdown, brownout, and startup behavior fit the product's control sequence.
Do not treat a shared family name as proof that every suffix is pin-compatible. Confirm digital-interface timing, channel mapping, control commands, filter configuration, electrical limits, package drawing, and exposed-pad requirements before substituting another STA559BW orderable variant. Avoid designing the PCB around a generic PowerSSO symbol until the exact manufacturer pin table has been checked.
Informations de conformité
Compliance declarations were not identified in the listed technical records. Confirm the current material and environmental compliance documentation for the exact orderable suffix with STMicroelectronics.
