STA50813TR - 40V 4.5A Class D Audio Amplifier | STMicroelectronics
N.º de pieza: STA50813TR ✓ ActivoSTA50813TR Descripción general
A digital audio power amplifier is a power-management semiconductor that converts digital pulse information into high-current audio outputs. The half-bridge arrangement uses switches to apply the supply voltage alternately to each side of the speaker load. When two half-bridges drive one speaker, the device operates as a full bridge; multiple output stages can also be combined for stereo or multi-channel amplification.
The STA50813TR supports a maximum supply voltage of 40 V and a maximum output current of 4.5 A. Its monolithic quad half-bridge stage uses STMicroelectronics Multipower BCD technology to combine analog control, digital drive, and power transistors in one package. The CONFIG pin can be connected to VDD to select single-bridge operation with doubled current capability. The device is intended for demanding powered-speaker systems where a compact external heat-spreading solution and efficient class-D conversion are important.
A useful architectural distinction is that the STA50813TR is a digital-input power stage rather than a conventional analog-input audio amplifier. It therefore belongs near the final speaker-output stage of a digital audio signal chain, behind the audio processor, codec, DAC, or PWM controller that generates the required drive signals. This arrangement allows digital volume control and signal processing to occur upstream while the power stage handles speaker current efficiently.
Typical uses include active loudspeakers, home-theater speaker systems, professional audio amplification, powered subwoofers, and compact multi-driver speakers. It is particularly appropriate when the system needs multiple Class D outputs, flexible bridge configuration, and operation from a supply up to 40 V. The exposed top pad also provides a direct path for heat removal from the power stage.
Designers should carefully route the high-current switching outputs, provide stable input and bootstrap circuitry, connect the exposed thermal pad to an effective copper heat-spreading area, and keep sensitive control and audio signal traces away from output switching nodes. The CONFIG connection and all input-interface timing must be validated against the manufacturer’s recommended application circuit before production release.
This product summary combines the identified device architecture, electrical ratings, package information, configuration options, and practical thermal and layout guidance. It also distinguishes verified drop-in replacements from related devices that merely share a broad product category, helping engineers evaluate replacement risk before modifying an existing amplifier design.
Alternativas directas para STA50813TR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
STA508A
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
STA50813TR Valores máximos y características eléctricas
| Device Type | Digital audio power amplifier |
| Amplifier Class | Class D |
| Architecture | Quad power half-bridge |
| Maximum Supply Voltage | 40 V |
| Corriente de salida máxima | 4.5 A |
| Configuración de salida | Mono or stereo |
| Input Type | Digital |
| Reconfiguration Method | Connect CONFIG pin to VDD for single-bridge operation with double current capability |
| Process Technology | Multipower BCD technology |
| Encapsulado | PowerSO-36 with exposed top pad |
| Recuento de pines | 36 pins |
| Tipo de montaje | Surface mount |
| Output Stage | Four power half-bridges |
Guía de configuración de pines de STA50813TR powerso-36 with exposed top pad
Configuración de pines para STA50813TR (encapsulado powerso-36 with exposed top pad). 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 STA50813TR.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
STA50813TR es adecuado para 6 aplicacións: Powered Stereo Loudspeaker, Powered Subwoofer, Home Theater Speaker Amplifier, Professional Active Speaker, Multi-Channel Audio System, Portable Powered Speaker.
Powered Stereo Loudspeaker
The STA50813TR fits a powered stereo loudspeaker when the system generates digital drive upstream. Its four Class D half-bridges can be arranged for stereo operation, while its 40 V maximum supply and 4.5 A maximum output current provide the core power-stage ratings needed by compact high-output speakers. Place the device near the speaker connectors, use low-impedance output routing, and dedicate substantial PCB copper to the exposed top pad. The upstream audio processor should provide the required digital signals, and the output network must be selected for the intended speaker impedance and amplifier topology.
Recomendado
Powered Subwoofer
The STA50813TR is suitable for a digitally driven powered subwoofer when the speaker load and power budget remain within the 40 V supply and 4.5 A output limits. Connecting CONFIG to VDD enables the single-bridge arrangement described for double current capability, allowing multiple half-bridges to serve a higher-current output configuration. The design must still account for peak speaker current, bass-signal slew requirements, output filtering, and thermal rise. Place the exposed-pad thermal area on uninterrupted copper and keep switching outputs short and separated from control traces.
Recomendado
Home Theater Speaker Amplifier
A home-theater power amplifier can use the STA50813TR to convert digital audio drive into Class D speaker outputs. The four-half-bridge organization supports flexible channel implementation, while the 40 V maximum supply is appropriate for higher-voltage amplifier buses compared with many low-voltage portable systems. Because the device is a digital power stage rather than a line-input amplifier, it should follow the system codec or audio processor. Output filters, speaker protection, channel routing, and the exposed-pad heat path must be designed together to prevent switching transients and thermal overload.
Recomendado
Professional Active Speaker
The STA50813TR can support a professional active-speaker power stage where efficient Class D conversion, flexible bridge configuration, and substantial output current are priorities. Its 4.5 A maximum output current and four integrated half-bridges reduce the number of external power-stage devices required for a multi-driver cabinet. The designer must independently verify continuous and peak loading, protection behavior, thermal performance, and signal timing for the selected speaker network. Use generous copper under the exposed top pad and preserve a quiet return path for control and digital drive signals.
Recomendado
Multi-Channel Audio System
The STA50813TR is applicable to multi-channel audio systems that need several Class D outputs from a compact power-stage package. Its four power half-bridges can be grouped for stereo or other supported configurations, and the CONFIG pin permits a single-bridge operating mode with increased current capability. This flexibility is useful when designing powered speakers, compact cinema systems, or amplified distribution units. Signal routing and amplifier configuration must be established before PCB layout because changing the bridge arrangement can affect pin usage, output-filter selection, speaker wiring, and protection thresholds.
Recomendado
Portable Powered Speaker
The STA50813TR can be used in a portable powered speaker when its battery-derived supply can support the required 40 V-class operating voltage and the design includes appropriate protection for supply transients. The Class D architecture provides efficient speaker drive, while the compact PowerSO-36 package integrates four half-bridges. Battery systems should use a regulated or boost-converter rail sized for the target output power, and designers should include undervoltage, overcurrent, and speaker-fault protection. Thermal performance depends on the enclosure, copper area, ambient temperature, and continuous duty cycle rather than package size alone.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para STA50813TR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | STA508A |
|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics |
| Package | PowerSO-36 with exposed top pad | PowerSO-36 |
| Amplifier Class | Class D | Class D |
| Architecture | Quad power half-bridge | STA508 power-stage family |
| Output Configuration | Mono or stereo | 1-channel mono, 2-channel stereo, or 4-channel stereo |
Diferenciadores clave
- Four power half-bridges are integrated in one package (frente a STA508A)
- CONFIG pin supports a higher-current single-bridge arrangement (frente a STA508A)
- Multipower BCD integration reduces external power-stage count (frente a STA508A)
Notas de diseño
Connect the exposed top pad to the largest practical uninterrupted copper region and provide thermal vias toward lower PCB layers. Estimated thermal sizing should begin with the worst-case output power, conversion loss, ambient temperature, and target junction limit. The actual power dissipation and operating-temperature limits must be taken from the manufacturer datasheet; the 40 V supply rating alone is not a safe operating point or a substitute for a heat-loss calculation.
Keep the CONFIG, clock or digital-control, and bootstrap connections away from power-output and switching-node traces. Place input and bootstrap components close to their associated pins, maintain short high-current output paths, and use a quiet ground strategy for the control circuitry. The CONFIG connection changes the bridge arrangement and available output current, so its routing should follow the manufacturer reference layout exactly and remain mechanically and electrically consistent with the selected speaker topology.
Design the supply path for the device’s 40 V maximum rating while including transient margin, local bulk decoupling, and protection appropriate to the amplifier’s operating class. Do not assume that the 4.5 A output rating applies equally to every internal half-bridge in every configuration. Confirm continuous and peak current limits, external component requirements, and output-filter topology in the manufacturer datasheet before selecting inductors, capacitors, MOSFETs, or protection components.
A common error is treating a related STA508 suffix as a drop-in replacement without checking its exact pin table and CONFIG behavior. Another error is using a generic line-level audio input architecture with this digital-input power stage. Verify the upstream signal format, timing, input levels, output mapping, speaker impedance, and exposed-pad connection. Also confirm that the amplifier’s output filtering and protection network are appropriate for the selected bridge arrangement before energizing the speaker.
Información de cumplimiento
No authoritative compliance declarations were identified for the exact STA50813TR ordering code. Confirm RoHS, REACH, halogen-free, and conflict-minerals status with STMicroelectronics using the product's current material-declaration documentation.
