TPA3116D2DADR - 50W Stereo Class-D Audio Amp | Texas Instruments
MPN: TPA3116D2DADR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.72 | $272.00 |
| 500 | $2.35 | $1,175.00 |
| 1,000 | $2.02 | $2,020.00 |
Drop-in alternatives for TPA3116D2DADR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TPA3116D2DAD
β Drop-Inπ Reference alternative (not in catalog)
TPA3116D2QDADRQ1
β Drop-Inπ Reference alternative (not in catalog)
TPA3118D2DAD
β Drop-Inπ Reference alternative (not in catalog)
TPA3110D2DAD
β Drop-Inπ Reference alternative (not in catalog)
TPA3130D2DAD
β Drop-Inπ Reference alternative (not in catalog)
TPA3126D2DAD
β‘ Same Packageπ Reference alternative (not in catalog)
TPA3116D2DADR Maximum Ratings & Electrical Characteristics
| Output Power | 2 x 50 W at 4 ohm, 10% THD+N |
| Mono Output Power | 100 W at 2 ohm (BTL) |
| Channels | 2 (Stereo) |
| Amplifier Class | Class-D |
| Supply Voltage Range | 4.5 V to 26 V |
| Input Type | Analog (differential/single-ended) |
| Load Impedance | 2 ohm to 8 ohm |
| SpeakerGuard | Yes (amplitude limiting) |
| Output Topology | Filter-free BTL |
| Package | HTSSOP-32 (DAD) with PowerPAD |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +85C |
| Efficiency | > 85% typical |
| Protections | Short-circuit, thermal shutdown, undervoltage lockout |
| AM Avoidance | Yes |
| RoHS Status | Compliant |
| MSL Level | [DATA_NEEDED: MSL Level] |
TPA3116D2DADR Pin Configuration
| Pin 1 | RINP β Right channel positive differential input |
| Pin 2 | RINN β Right channel negative differential input |
| Pin 4 | PLIMIT β Power limit setting input |
| Pin 5 | SD β Shutdown (active low) |
| Pin 6 | GAIN/SLV β Gain select / slave mode |
| Pin 8 | LINN β Left channel negative differential input |
| Pin 9 | LINP β Left channel positive differential input |
| Pin 12 | VCLAMP β Bootstrap clamp voltage |
| Pin 14 | AVCC β Analog supply |
| Pin 15 | AGND β Analog ground |
| Pin 20, 21, 24, 25 | PVCC β Power stage supply |
| Pin 18, 27 | OUTN_L / OUTP_L β Left BTL outputs |
| Pin 17, 28 | OUTN_R / OUTP_R β Right BTL outputs |
| Pin 13 | GVDD_DET β Gate drive supply detect |
| Pin PowerPAD | GND (thermal pad) β Ground and primary thermal path - must be soldered |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TPA3116D2DADR is suitable for 6 applications: Bluetooth Active Speakers, Soundbars and TV Audio, Portable PA and Karaoke Systems, Automotive Infotainment Audio, Multichannel Home Theater Amplifiers, Industrial and Commercial Announcement Systems.
Bluetooth Active Speakers
The TPA3116D2DADR is a leading choice for Bluetooth and wireless active speakers because its 4.5-26 V supply range matches both battery packs and 12-24 V adapters, and its differential analog inputs connect directly to Bluetooth codec outputs. The filter-free BTL output eliminates LC filter cost, while over 85% efficiency keeps the 2 x 50 W design heat-sink-free on a two-layer PCB. SpeakerGuard amplitude limiting protects small drivers from clipping-induced damage during loud playback.
Recommended
Soundbars and TV Audio
In slim soundbar platforms, board height and thermal budget are constrained; the TPA3116D2DADR's HTSSOP-32 PowerPAD package mounts flush to the PCB, and its high switching efficiency eliminates heatsink protrusion. AM-avoidance modulation prevents switching harmonics from interfering with tuners in TV systems, and integrated short-circuit plus thermal shutdown protects against speaker-line faults. A 19-24 V adapter input supports full 2 x 50 W output for premium 2.1-channel bars.
Recommended
Portable PA and Karaoke Systems
Portable PA and karaoke amplifiers need high output from a single 12 V or 24 V battery/adapter rail. The TPA3116D2DADR delivers 100 W mono into 2 ohms or 2 x 50 W into 4 ohms directly from these rails without a boost converter. Its efficiency preserves battery runtime, and the master/slave-capable architecture allows two devices to be paralleled into larger four-channel systems with shared clocking and gain structure.
Recommended
Automotive Infotainment Audio
For automotive speaker zones and aftermarket amplifiers, the pin-compatible TPA3116D2QDADRQ1 variant carries AEC-Q100 qualification while sharing the standard part's 2 x 50 W output and 4.5-26 V supply that tolerates 12 V battery cold-crank and load-dump conditions with suitable front-end protection. SpeakerGuard prevents driver damage during transients, and thermal shutdown protects against enclosed-module overheating in dashboard installations.
Recommended
Multichannel Home Theater Amplifiers
Budget AV receivers and multichannel plate amplifiers use multiple TPA3116D2DADR channels on a shared 24 V supply to build 4.1 or 5.1 systems at low cost per watt. Each device adds only a few watts of dissipation, so a single fanless chassis can house four to six channels. The analog input architecture integrates simply with existing volume-control and DSP front ends without needing I2S or digital-input infrastructure.
Recommended
Industrial and Commercial Announcement Systems
Factory paging, kiosk, and commercial announcement amplifiers benefit from the TPA3116D2DADR's wide 4.5-26 V input tolerance and robust integrated protections. Short-circuit tolerance survives speaker-line faults common in long cable runs, and undervoltage lockout prevents false operation during supply dips. The 100 W mono 2-ohm mode drives multiple parallel horn speakers from one channel, and high efficiency suits always-on 24/7 operation without heatsink maintenance.
Recommended
Recommended Products Summary
Engineering reference data for TPA3116D2DADR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPA3116D2DAD | TPA3116D2QDADRQ1 | TPA3118D2DAD | TPA3130D2DAD |
|---|---|---|---|---|---|
| Package | HTSSOP-32 (DAD) | HTSSOP-32 - same | HTSSOP-32 - same | HTSSOP-32 - same | HTSSOP-32 - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Power | 2 x 50 W (4 ohm) | 2 x 50 W | 2 x 50 W | 2 x 30 W (8 ohm) | 2 x 15 W |
| Supply Voltage | 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 18 V |
| Automotive Grade | No | No | Yes (AEC-Q100) | No | No |
| SpeakerGuard | Yes | Yes | Yes | Yes | Yes |
| Single-Layer PCB Capable | No (2-layer recommended) | No | No | Dual layer, no heatsink | Yes (2 x 15 W) |
| Price (1 pc, as of 2026-08-29) | 3.45 USD | 3.45 USD | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Full 2 x 50 W output in family (vs TPA3118D2DAD)
- Wider 26 V supply range (vs TPA3130D2DAD)
- SpeakerGuard protection (vs TPA3130D2DAD)
Design Notes
Solder the HTSSOP-32 PowerPAD to a continuous ground pour with an array of thermal vias (typically 3x3 or 4x4, 0.3 mm drill) connecting to inner/bottom copper layers. At 2 x 50 W with >85% efficiency, dissipation is roughly 10-15 W worst case at low supply frequencies of high crest-factor audio; copper area, not a heatsink, is the primary thermal path per TI application guidance in the TPA31xxD2 datasheet.
Decouple each PVCC pair with at least a 10 uF bulk electrolytic/polymer plus 0.1 uF ceramic placed within 5 mm of the pins. At high output currents into 4 ohms, supply ripple couples into the audio band; a 470 uF to 1000 uF bulk reservoir near the amplifier reduces bass distortion. AVCC must be filtered with an RC (e.g., 10 ohm + 1 uF) from PVCC to keep the analog section clean.
Although filter-free, long speaker cables can radiate switching harmonics. Place a ferrite bead (e.g., 600 ohm at 100 MHz) in series with each output and keep the PVCC-to-output loop area minimal. The AM-avoidance scheme helps, but routing speaker traces as tight pairs away from input lines prevents AM-band and RF pickup. Reference TI's TPA31xxD2 layout guidelines section of the datasheet.
Do not float the SD (shutdown) pin - tie it to AVCC through a pull-up or control it actively or the amplifier stays off. Ensure GVDD_DET bootstrap capacitors are populated per datasheet values; omitting them causes output glitching at startup. When driving 2-ohm mono loads, verify PVCC trace width for peak currents exceeding 5 A.
Compliance Information
RoHS compliant and lead-free per TI product page and DigiKey listing. AEC-Q100 applies only to the TPA3116D2QDADRQ1 variant.
