STA559BWSTR - 5V 2A 2.1-Channel Digital Amplifier | ST
N.º de pieza: STA559BWSTR ✓ ActivoSTA559BWSTR Descripción general
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.
Alternativas directas para STA559BWSTR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con STA559BWSTR (mismo factor de forma y huella) — difiere en Package.
STA559BW
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
STA559BW13TR
✅ Sustitución directaConsulte el precio
Ver hoja de datos →STA559BWSTR Valores máximos y características eléctricas
| Product Type | Fully integrated digital audio processor and amplifier |
| Manufacturer | STMicroelectronics |
| Tensión de alimentación | 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 |
| Encapsulado | PowerSSO-36 EPD |
| Recuento de pines | 36 pins |
| Tipo de montaje | Surface mount |
Guía de configuración de pines de STA559BWSTR powersso-36 epd
Configuración de pines para STA559BWSTR (encapsulado powersso-36 epd). Este componente analógico presenta pines de entrada, salida y alimentación. Consulte la hoja de datos del fabricante para conocer las configuraciones de los pines de ajuste de offset, compensación y habilitación. Ideal para circuitos de acondicionamiento de señal y amplificadores.
No hay datos detallados de patillaje disponibles para STA559BWSTR.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
STA559BWSTR es adecuado para 6 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para STA559BWSTR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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 |
Diferenciadores clave
- Single-chip 2.1-channel signal chain (frente a STA559BW)
- Established 36-pin PowerSSO EPD package association (frente a STA559BW13TR)
- Integrated digital processing and amplification (frente a STA559BW)
Notas de diseño
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.
Información de cumplimiento
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.
