TAS5111DAD - 70W Mono Class D Power Stage | Texas Instruments
N.º da peça: TAS5111DAD ✓ AtivoTAS5111DAD Visão geral
A Class D digital amplifier power stage is a semiconductor subsystem that converts processor-generated pulse-width-modulated signals into a high-current differential output capable of driving a loudspeaker. It belongs to the amplifier IC hierarchy and, more broadly, to audio signal-chain and power-conversion electronics. Compared with a traditional linear audio output stage, the switching architecture can reduce wasted energy and heat while supporting compact audio products with high output power.
According to the Texas Instruments datasheet, the TAS5111DAD supports 70 W RMS power in a bridge-tied-load configuration into 4 ohms with less than 1% distortion. The device is specifically positioned for DVD receivers, home-theatre systems, mini and micro component systems, and internet music appliances. Its mono architecture is useful when a system needs independent amplification for separate left and right speakers using two power stages.
The power stage receives digital audio information rather than a conventional analog audio waveform. A digital audio processor performs filtering, volume control, and modulation before sending PWM data to the TAS5111DAD. This division of responsibility allows system designers to separate digital signal processing from the high-power analog output stage, simplifying control of volume, equalization, channel mapping, and system-level mute behavior.
Typical implementations include powered home-theatre speakers, compact stereo systems, multimedia speakers, and internet-music appliances. In each case, the TAS5111DAD can drive a low-impedance speaker from a short digital command path while leaving decoding and signal processing to a companion controller. The design must still account for the device's thermal requirements, exposed-pad layout, output filtering, and speaker wiring.
Use the manufacturer datasheet for the exact pin assignment, power-supply limits, control-interface timing, output filter recommendations, and exposed-pad layout. The 32-pin HTSSOP power package requires a carefully designed PCB with adequate copper for heat dissipation and very low-impedance power and ground connections. Incorrect filtering or poor thermal coupling can limit performance even when the electrical power capability is sufficient.
This product record combines the device's published power rating, package identity, application targets, and sourcing information with practical guidance on PCB implementation, thermal management, filtering, and system integration. It also provides verified source links for engineers comparing the TAS5111DAD with other mono Class D output stages.
Alternativas drop-in para TAS5111DAD — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Nenhuma alternativa drop-in disponível para este produto.
Solicitar alternativasTAS5111DAD Classificações máximas e características elétricas
| Product Type | Digital amplifier power stage |
| Manufacturer | Texas Instruments |
| Channel Configuration | 1 channel (mono) |
| Amplifier Class | Class D |
| Configuração de saída | Bridge-tied load (BTL) |
| Rated Output Power | 70 W RMS into 4 ohms |
| Distortion | Less than 1% |
| Encapsulamento | 32-pin HTSSOP |
| Tipo de montagem | Surface mount |
| Primary Application | DVD receiver |
| Additional Application | Home theatre |
| Additional Application | Mini/micro component system |
| Additional Application | Internet music appliance |
| Digital Control Interface | PWM command input from digital audio processor |
Guia de Configuração de Pinos do TAS5111DAD 32-pin htssop
Configuração de pinos para TAS5111DAD (pacote 32-pin htssop). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para TAS5111DAD.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
TAS5111DAD é adequado para 6 aplicaçãos: Powered Home-Theatre Speakers, DVD Receiver Speaker Outputs, Mini and Micro Component Systems, Internet Music Appliances, Digital Audio Monitor Speakers, Multimedia Speaker Systems.
Powered Home-Theatre Speakers
The TAS5111DAD fits a powered home-theatre speaker because it provides a mono, 70 W RMS Class D output stage for a 4-ohm bridge-tied-load driver. A digital audio processor can perform decoding, volume control, and channel routing before delivering PWM commands to the power stage. Using one TAS5111DAD per speaker channel preserves independent channel control while keeping the external signal chain scalable. The design must provide a supply rated for the intended output level, use the manufacturer-recommended output filter, and preserve the exposed-pad thermal connection. Verify the final acoustic output, idle behavior, thermal rise, and speaker protection margin in the assembled enclosure rather than relying only on the nominal 70 W rating.
Recomendado
DVD Receiver Speaker Outputs
The TAS5111DAD is directly aligned with DVD-receiver applications because the Texas Instruments datasheet identifies DVD receivers as a principal use for this mono power stage. Its 70 W RMS capability into 4 ohms supports higher-output speaker channels while a host processor manages decoding and surround-channel routing. The amplifier operates from digital command signals, allowing volume, mute, and channel selection to be coordinated in the receiver controller. For implementation, prioritize a low-noise power rail, short return paths for PWM data and clock signals, correct output-filter component selection, and adequate copper around the HTSSOP thermal pad. Confirm amplifier gain and modulation limits against the processor configuration to avoid clipping before the speaker output reaches its intended level.
Recomendado
Mini and Micro Component Systems
Compact mini and micro component systems benefit from the TAS5111DAD because Class D power stages can combine high output capability with efficient operation in a constrained enclosure. The 70 W RMS rating into a 4-ohm bridge-tied-load speaker provides useful headroom for powered speakers, while a digital controller can centralize volume, tone, and channel functions. Placement and airflow remain critical in a small housing, so connect the exposed pad to a generous copper area and use multiple thermal vias where the PCB stack-up permits. Keep the switching-current output loop compact and follow the prescribed LC filter layout to limit electromagnetic interference. Evaluate thermal performance at the highest sustained output level and with the enclosure fully assembled.
Recomendado
Internet Music Appliances
The TAS5111DAD is suitable for an internet music appliance because the datasheet explicitly identifies that application. A network-enabled source can feed decoded digital audio into a processor, which then supplies the PWM command stream required by the mono power stage. This arrangement supports software-controlled volume and mute functions while the TAS5111DAD drives a 4-ohm speaker at up to 70 W RMS with less than 1% distortion. Because network audio products may sit in acoustically sensitive or space-constrained housings, use the recommended filter components, maintain short digital timing paths, and provide effective heat spreading beneath the 32-pin HTSSOP. Add appropriate speaker protection and verify conducted and radiated emissions as the enclosure and cable configuration are finalized.
Recomendado
Digital Audio Monitor Speakers
The TAS5111DAD can serve as the power-output stage in an active digital monitor speaker when the system architecture separates audio processing from loudspeaker drive. The device accepts processor-generated PWM commands and supplies a high-current differential Class D output to a 4-ohm driver, making it suitable for near-field monitor and multimedia speaker designs. At the nominal 70 W RMS capability, thermal management and output filtering require careful implementation. Place the output filter close to the amplifier pins, use low-ESR components with suitable voltage and current ratings, and provide robust decoupling between the power supply and device. For two-way speakers, use independent left and right channels and verify crossover behavior with the output filter, loudspeaker impedance, and amplifier gain included in the test setup.
Recomendado
Multimedia Speaker Systems
The TAS5111DAD is appropriate for multimedia speaker systems that require a dedicated mono Class D output stage for each speaker. Its 70 W RMS rating into 4 ohms is suitable for powered computer and home-media speakers, while its digital command interface allows a central controller to manage volume and mute status. The system architecture should maintain a clean separation between audio decoding, digital processing, and power conversion. Use a dedicated power rail with low enough impedance for transient speaker current, keep the PWM and clock routes short, and implement the manufacturer-recommended output network with controlled component tolerances. Before production, confirm that the power supply supports the required peak and sustained current and that the PCB's exposed-pad area can dissipate the calculated conduction loss without exceeding the device's operating-temperature limits.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TAS5111DAD — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto |
|---|---|
| Channel Configuration | 1 channel (mono) |
| Brand | Texas Instruments |
| Package | 32-pin HTSSOP |
| Product Type | Digital amplifier power stage |
| Amplifier Class | Class D |
| Output Power | 70 W RMS into 4 ohms |
| Distortion | Less than 1% |
| Output Configuration | Bridge-tied load (BTL) |
| Control Method | PWM command input from digital audio processor |
| Primary Applications | DVD receiver, home theatre, mini/micro component system, internet music appliance |
Principais diferenciais
- Dedicated 70 W mono output stage (vs TAS5112ADFDG4)
- Power-stage architecture separates processing from output drive (vs TAS5112DFD)
- 32-pin HTSSOP power package (vs TAS5112ADFDG4)
Notas de projeto
Treat the exposed pad as the principal thermal path for the 32-pin HTSSOP package. Follow the Texas Instruments datasheet land-pattern and via recommendations, provide uninterrupted ground copper beneath and around the device, and avoid long thermal-via stubs into an internal plane. Estimated thermal design should use actual amplifier conduction loss based on supply voltage, output voltage, efficiency, and load current rather than the 70 W speaker rating directly. Validate the hottest locations in the assembled enclosure at maximum sustained volume.
Keep the digital PWM and clock routes short, controlled-impedance where required, and away from the differential speaker-output traces and magnetics. Route the Class D output path as a compact loop with minimum loop area to reduce switching noise. Place input, output, and bypass components according to the reference layout in the manufacturer datasheet, and provide a low-impedance power-and-ground return that can support the load's transient current without coupling output switching into the digital command network.
Use only the filter values and magnetics specified by the manufacturer for the selected switching frequency and output impedance. Install the output-filter components close to the power-stage pins, maintain short differential traces, and connect filter return paths cleanly to the device ground reference. Evaluate electromagnetic emissions with the final speaker cable, power-supply layout, enclosure, and grounding configuration because an open bench setup can conceal common-mode current and filtering issues.
Do not assume that a similar Texas Instruments part is a drop-in replacement: the TAS5111DAD is a mono 32-pin HTSSOP power stage with a defined PWM-control architecture, whereas some family members are stereo or use different packages. Confirm clock timing, input logic, amplifier gain, supply limits, output-filter values, exposed-pad connections, and maximum output power before revising a PCB. Use the Request a Quote form for the original MPN when exact sourcing is required.
Informações de conformidade
RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals declarations are not stated in the available product synopsis. Confirm current compliance with Texas Instruments before qualification.
