TPA3116D2DADR - 50W Stereo Class-D Audio Amp | Texas Instruments
N.º da peça: TPA3116D2DADR ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.45 | $3,45 |
| 10 | $3.1 | $31,00 |
| 100 | $2.72 | $272,00 |
| 500 | $2.45 | $1.225,00 |
| 1.000 | $2.2 | $2.200,00 |
TPA3116D2DADR Visão geral
A Class-D audio amplifier is a switching amplifier whose output transistors operate as switches rather than linear elements, achieving efficiency above 85-90 percent. In the amplifier IC hierarchy, it sits under audio amplifiers, within the broader linear-amplifier IC family, and replaces bulky Class-AB stages plus heat sinks in compact speaker systems.
Key features include filter-free operation with an integrated feedback loop that tolerates speaker inductance without an LC output filter, SpeakerGuard amplitude limiting that protects speakers from over-power events, and an AM-avoidance modulation scheme that keeps switching harmonics out of the AM broadcast band. Differential analog inputs improve common-mode noise rejection, and integrated short-circuit and thermal shutdown protection raise system robustness.
The device uses an AD modulation topology with 250 kHz-class switching, so high efficiency eliminates heat sinks in most 2 x 50 W designs on a two-layer PCB with adequate copper pour. Fixed internal gain options and a master/slave-capable architecture simplify multi-channel designs; power-supply pumping is managed by the BTL configuration at low frequencies.
Typical applications include Bluetooth and active speakers, soundbars, TV audio, portable PA and karaoke systems, and automotive/infotainment speaker drivers where efficiency and small size matter.
Design consideration: at 2 x 50 W, PCB copper area under the exposed pad is the primary thermal path - provide a solid ground pour with thermal vias, and place supply decoupling (at least 10 uF bulk plus 0.1 uF ceramic) close to PVCC pins to minimize supply ripple and EMI.
This page synthesizes distributor pricing, drop-in alternatives, comparison tables, and practical design notes not found in the manufacturer datasheet. Pricing below as of 2026-08-29.
Alternativas drop-in para TPA3116D2DADR — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
TPA3116D2QDADRQ1
📋 Alternativa de referência (fora do catálogo)
TPA3116D2DAD
📋 Alternativa de referência (fora do catálogo)
TPA3118D2DAD
📋 Alternativa de referência (fora do catálogo)
TPA3130D2DAP
📋 Alternativa de referência (fora do catálogo)
TPA3126D2DAD
📋 Alternativa de referência (fora do catálogo)
TPA3116D2DADR Especificações
| Amplifier Type | Class-D (filter-free) |
| Canais | 2 (Stereo) |
| Output Power | 2 x 50 W into 4 ohm (BTL) |
| Mono Output Power | 100 W into 2 ohm (PBTL) |
| Supply Voltage Range | 4.5 V to 26 V |
| Input Type | Analog (differential/single-ended) |
| Configuração de saída | BTL / PBTL |
| Switching Topology | AD modulation with AM avoidance |
| Speaker Protection | SpeakerGuard amplitude limiting |
| Protection Features | Short-circuit, thermal shutdown, undervoltage lockout |
| Encapsulamento | 32-pin HTSSOP (DAD) with exposed thermal pad |
| Tipo de montagem | Surface Mount |
| Eficiência | >85% (typical Class-D switching) |
| Status RoHS | Compliant |
| Status do ciclo de vida | Active |
| Typical Applications | Bluetooth speakers, soundbars, TV audio, PA systems |
Guia de Configuração de Pinos do TPA3116D2DADR 32-pin htssop (dad) with exposed thermal pad
Configuração de pinos para TPA3116D2DADR (pacote 32-pin htssop (dad) with exposed thermal pad). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para TPA3116D2DADR.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
TPA3116D2DADR é adequado para 6 aplicaçãos: Bluetooth and Wireless Speakers, Soundbars and TV Audio, Portable PA and Karaoke Systems, Automotive Infotainment Speaker Drivers, Multi-Channel Home Audio Systems, DIY and Maker Amplifier Boards.
Bluetooth and Wireless Speakers
The TPA3116D2DADR is the workhorse amplifier for battery-powered and adapter-powered Bluetooth speakers. Its 4.5-26 V supply range accepts 2S-6S lithium stacks or 12-24 V wall adapters, and its >85% Class-D efficiency extends battery runtime compared with Class-AB alternatives that would dissipate tens of watts as heat. Differential analog inputs reject RF noise from the Bluetooth module, while the AM-avoidance modulation scheme prevents switching harmonics from interfering with AM reception. The filter-free BTL output removes bulky inductors, keeping the speaker enclosure compact. Place 10 uF bulk plus 0.1 uF ceramic decoupling at each PVCC pin to minimize supply ripple during bass transients, and use SpeakerGuard amplitude limiting to protect small drivers from clipping damage.
Recomendado
Soundbars and TV Audio
In soundbar and TV audio systems, the TPA3116D2DADR provides 2 x 50 W into 4-ohm drivers directly from a single 19-26 V external supply. Its high efficiency eliminates the heatsink that a Class-AB design of equal output would require, allowing a fully enclosed slim chassis. The differential inputs reject ground-bounce noise from the TV HDMI-CEC and digital board, and the filter-free architecture shortens the speaker wiring path inside the enclosure. SpeakerGuard protects the slender soundbar drivers from over-power faults at high volume. Estimated: at 100 W total audio output and roughly 9 W worst-case dissipation, a two-layer PCB with a solid copper pour under the exposed thermal pad and an array of thermal vias maintains junction temperature within ratings without external cooling.
Recomendado
Portable PA and Karaoke Systems
Portable PA, busker amplifiers, and karaoke machines rely on the TPA3116D2DADR for loud output from a compact, battery-friendly platform. The 100 W mono PBTL mode drives a single 2-ohm woofer for maximum SPL from one amplifier, while the stereo mode serves two-way active speakers. Thermal shutdown and short-circuit protection tolerate the demanding duty cycles and hot environments of outdoor PA use, and SpeakerGuard prevents driver damage when users push the volume to maximum. At 26 V supply the amplifier sustains full-rated output; at 12 V battery operation the achievable output is proportionally lower, which designers should budget in SPL calculations. Keep the DC volume/gain pins configured per the datasheet gain-select table for the chosen speaker impedance.
Recomendado
Automotive Infotainment Speaker Drivers
For automotive and 12 V vehicle-audio applications, the TPA3116D2QDADRQ1 variant (the AEC-Q100-qualified version of the same die) operates from the 4.5-26 V supply range, covering cold-crank transients up to normal 13.8 V alternator operation and load-dump events handled upstream by protection circuitry. The differential inputs reject alternator whir and common-mode noise on the vehicle's audio ground, and the AM-avoidance modulation keeps the amplifier from interfering with AM radio in the same vehicle. The filter-free BTL output saves board area in head-unit and amplifier-module designs. The high efficiency is essential in sealed automotive enclosures where airflow is unavailable, making PCB copper the primary thermal path.
Recomendado
Multi-Channel Home Audio Systems
In 4.1 and 5.1 active speaker systems, multiple TPA3116D2DADR devices or a mix of TPA31xxD2 family members build multi-channel amplification on a single PSU rail of 19-26 V. The device supports master/slave synchronization of the switching clocks so that multiple Class-D channels do not produce audible intermodulation beat tones, a common pitfall in multi-amplifier designs. Uniform family pinout across TPA3116/TPA3118/TPA3130 lets one PCB layout serve different channel power classes by swapping the IC, reducing development effort. SpeakerGuard on every channel protects satellite drivers and the subwoofer alike, and differential inputs allow balanced interconnect between the preamp board and the power-amp board across the cabinet.
Recomendado
DIY and Maker Amplifier Boards
The TPA3116D2DADR is the most widely used IC in DIY Class-D amplifier boards (widely available as 2 x 50 W and 2 x 120 W-peak modules). Hobbyists value its tolerance of 12-24 V laptop and LED-driver supplies, minimal external component count, and the absence of an output filter. The integrated protections (short-circuit, thermal, SpeakerGuard) make the boards forgiving of speaker shorts and overdriving. For reliable results, builders should ensure the supply can deliver the peak current - estimated: 2 x 50 W into 4 ohms requires roughly 8-10 A peak from the supply - and should mount the IC on a board with genuine copper pour under the thermal pad, since counterfeit or thin-copper boards frequently trigger thermal shutdown at sustained high output.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TPA3116D2DADR — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | TPA3116D2QDADRQ1 | TPA3116D2DAD | TPA3118D2DAD | TPA3130D2DAP |
|---|---|---|---|---|---|
| Package | HTSSOP-32 (DAD) exposed pad | HTSSOP-32 (DAD) - same | HTSSOP-32 (DAD) - same | HTSSOP-32 (DAD) - same | HTSSOP-32 (DAP) - same footprint family |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Power (Stereo) | 2 x 50 W / 4 ohm | 2 x 50 W / 4 ohm | 2 x 50 W / 4 ohm | 2 x 30 W / 8 ohm | 2 x 15 W / 4 ohm |
| Supply Voltage Range | 4.5 V to 26 V | 4.5 V to 26 V | 4.5 V to 26 V | 4.5 V to 26 V | 4.5 V to 26 V |
| SpeakerGuard Protection | Yes | Yes | Yes | Yes | Yes |
| Automotive Grade (AEC-Q100) | No | Yes (Q1) | No | No | No |
Principais diferenciais
- Highest output power in the TPA31xxD2 pin-compatible family (vs TPA3118D2DAD)
- Automotive-qualified drop-in exists (vs TPA3116D2QDADRQ1)
- 100 W mono capability from a single IC (vs TPA3130D2DAP)
- Trade-off: higher power requires more thermal copper (vs TPA3130D2DAP)
Notas de projeto
The exposed thermal pad of the HTSSOP-32 (DAD) package is the only meaningful heat path - do not omit the pad solder connection. Estimated: delivering 2 x 50 W at roughly 90% efficiency dissipates on the order of 9 W worst case, so provide a solid ground pour of at least 1 square inch directly under the pad on the top layer plus matching pour on the bottom layer, stitched with a 4x4 or denser array of thermal vias (0.3 mm drill, filled or tented). Under-provisioned boards will cycle into thermal shutdown at sustained high output into 4-ohm loads.
Size the power supply for peak, not average, current. Estimated: 2 x 50 W into 4 ohms draws roughly 8-10 A peak from a 24 V rail during bass transients; undersized supplies cause audible sag and may trip undervoltage lockout. Place at least 10 uF bulk electrolytic or polymer capacitance plus 0.1 uF ceramic within millimeters of each PVCC pin. Keep PVCC and ground traces short and wide to minimize supply ripple re-injected through the Class-D output stage.
Although the AM-avoidance modulation keeps switching harmonics out of the AM broadcast band, layout still matters: route speaker outputs as tightly coupled differential pairs (parallel traces with ground between layers), avoid running speaker traces parallel to input signal lines, and keep the differential input traces short and symmetric. For enclosures with external speaker wiring longer than ~30 cm, add a common-mode choke or ferrite bead on each speaker lead to pass conducted-emissions testing.
Do not exceed the 26 V maximum supply - 24 V adapters with poor regulation can exceed this on light load. Verify gain-select resistor strapping against the speaker impedance: driving 4-ohm loads at maximum gain settings can exceed the output stage's safe current. When substituting the TPA3118D2 or TPA3130D2 for cost reduction, note their lower output ratings are not software-configurable; PCB thermal design sized for TPA3116 power will be fine, but system SPL targets must be re-checked.
Informações de conformidade
RoHS compliant per TI product listing for TPA3116D2DADR (R suffix). AEC-Q100 qualified version is the separate TPA3116D2QDADRQ1 part.
