TPA3116D2 Audio Amplifier with Tone Control Panel, 2 x 80 W (12 – 24 VDC or 12 – 17 VAC)
TPA3116D2 Audio Amplifier with Tone Control Panel, 2 x 80 W (12 – 24 VDC or 12 – 17 VAC)
TPA3116D2 Audio Amplifier with Tone Control Panel, 2 x 80 W (12 – 24 VDC or 12 – 17 VAC)
The TPA3116D2 is a Class D digital audio amplifier module featuring integrated tone control circuitry, delivering 2 x 80W of clean audio output across a flexible dual voltage supply range of 12-24VDC or 12-17VAC. Audio engineers, DIY enthusiasts, and professional installers rely on this amplifier for compact, high-efficiency audio systems in automotive, home theater, and portable PA applications. This module solves the critical challenge of achieving high-power audio amplification in space-constrained environments while maintaining superior sound quality through integrated bass, treble, and volume control without requiring external tone control boards.
Product Overview
The TPA3116D2 utilizes Texas Instruments' advanced Class D amplification topology, which operates at switching frequencies above the audible range to achieve efficiency ratings exceeding 90 percent. Unlike traditional Class AB amplifiers that dissipate significant power as heat, the TPA3116D2's switching architecture minimizes thermal output while delivering high current capability. The integrated tone control panel provides independent bass and treble adjustment circuits with center-detent potentiometers, allowing real-time audio shaping without introducing signal degradation or noise floor elevation. The module accepts line-level audio inputs (typically 100mV to 1V RMS) and features stereo channel separation with individual volume controls per channel.
The dual voltage input specification (12-24VDC or 12-17VAC) provides exceptional flexibility for integration into diverse power supply ecosystems. The amplifier incorporates comprehensive protection circuitry including thermal shutdown, DC offset detection, and short-circuit protection on both output channels. The PCB layout is optimized for minimal EMI emission and includes ferrite core inductors on power rails to suppress high-frequency switching noise. The compact form factor, typically measuring under 120mm x 80mm, makes it ideal for embedded audio applications where space efficiency is paramount.
Key Specifications
| Specification | Details |
| Product Type | Class D Digital Audio Amplifier with Integrated Tone Control |
| Brand | TPA3116D2 (Texas Instruments Architecture) |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
| Output Power | 2 x 80W RMS at 4 Ohms, 10% THD |
| Supply Voltage | 12-24VDC or 12-17VAC (Switchable) |
| Input Impedance | 20 kOhms (Stereo RCA or 3.5mm Jack) |
| Frequency Response | 20Hz to 20kHz (±3dB) |
| Signal-to-Noise Ratio | Greater than 90dB (A-weighted) |
| Total Harmonic Distortion | Less than 0.1% at 1kHz, 80W output |
| Bass Control Range | ±12dB at 100Hz |
| Treble Control Range | ±12dB at 10kHz |
| Output Impedance | 4 Ohms minimum per channel |
| Thermal Shutdown | Automatic protection at 95°C |
Key Features
- Class D Amplification Architecture: Delivers 2 x 80W output with efficiency exceeding 90%, reducing power consumption and heat dissipation compared to traditional linear amplifier designs
- Integrated Tone Control Panel: Independent bass and treble adjustment circuits with ±12dB range at center frequencies, eliminating the need for external equalizer modules
- Dual Voltage Input Flexibility: Operates on 12-24VDC or 12-17VAC, accommodating both DC power supplies and transformer-based AC sources for maximum installation versatility
- Comprehensive Protection Circuitry: Includes thermal shutdown at 95°C, DC offset detection, and short-circuit protection on both output channels to safeguard connected speakers
- Low Distortion Performance: Total harmonic distortion below 0.1% at full 80W output ensures clean audio reproduction without audible coloration or intermodulation artifacts
- Compact PCB Design: Optimized layout under 120mm x 80mm with ferrite core inductors minimizes EMI emission and switching noise, suitable for embedded automotive and portable applications
Applications and Use Cases
- Automotive Audio Systems: Integration into vehicle infotainment systems, aftermarket amplification modules, and motorcycle audio installations where 12-24VDC supply from battery systems is standard
- Portable PA and Live Sound: Compact amplification for battery-powered PA systems, busking equipment, and mobile DJ setups requiring lightweight, efficient amplification with integrated tone shaping
- Home Theater Subwoofer Amplification: Dedicated amplification for subwoofer drivers in compact home theater systems, providing bass management through integrated bass control circuit
- DIY Audio Projects: Ideal platform for custom speaker systems, vintage amplifier restoration, and educational electronics projects requiring Class D amplifier architecture study
- Bluetooth Speaker Integration: Core amplification module for wireless Bluetooth speaker designs, powered by rechargeable lithium battery packs in the 12-24V range
- Marine and RV Audio: Weatherproof installation in boats and recreational vehicles where AC or DC power supplies are available and space constraints demand efficient amplification
How to Use
Begin by selecting the appropriate power supply configuration: if your installation uses a DC power source (automotive battery, regulated DC supply), connect the positive and negative terminals to the marked 12-24VDC input pads on the PCB. For AC-powered installations, connect the transformer secondary winding (12-17VAC output) to the AC input terminals. Ensure the voltage selection jumper on the board matches your supply type. Connect your audio source (smartphone, mixer, media player) to the stereo RCA input connectors or 3.5mm jack, maintaining proper left and right channel assignment. Connect your speakers to the output terminals, verifying impedance compatibility (minimum 4 Ohms per channel) to prevent amplifier shutdown.
After power-up, allow 30 seconds for the amplifier to initialize and perform internal diagnostic checks. Adjust the master volume control to approximately 50 percent of full rotation, then gradually increase while monitoring for distortion. Use the integrated bass and treble potentiometers to shape the audio response according to your acoustic environment and speaker characteristics. The bass control affects frequencies around 100Hz with a ±12dB range, while the treble control targets 10kHz frequencies. If the amplifier enters thermal shutdown (indicated by LED status or audio cutoff), reduce the output volume and ensure adequate ventilation around the PCB. For extended operation at maximum power output, consider mounting the amplifier on a small heatsink or in an enclosure with forced-air cooling to maintain junction temperatures below 80°C.
Frequently Asked Questions
What is the difference between Class D and Class AB amplifier topologies, and why is Class D superior for this application?
Class D amplifiers use high-frequency pulse-width modulation to switch output transistors on and off, achieving efficiency rates exceeding 90 percent with minimal heat generation. Class AB amplifiers operate in linear mode, with output transistors conducting continuously, resulting in 50-70 percent efficiency and significant heat dissipation. For the TPA3116D2, Class D topology enables 2 x 80W output from a compact PCB with minimal heatsinking, making it ideal for portable and space-constrained applications. The trade-off is that Class D requires careful PCB layout and filtering to minimize switching noise, which this module addresses through ferrite core inductors and optimized trace routing.
Can I use the TPA3116D2 with 4-ohm and 8-ohm speakers simultaneously on different channels?
Yes, the TPA3116D2 supports mixed impedance loads across its two output channels. Each channel is independently protected and can drive speaker loads from 4 to 8 ohms. However, do not connect impedances below 4 ohms, as this will trigger the short-circuit protection and cause the amplifier to shut down. If you require 2-ohm operation, consult the protection circuit documentation to verify safe operating parameters. For optimal performance, match speaker impedances across both channels to maintain balanced power distribution and prevent one channel from dominating the thermal budget.
What is the maximum input signal level the TPA3116D2 accepts, and how do I prevent clipping?
The TPA3116D2 is designed for line-level inputs, typically accepting 100mV to 1V RMS signals. Maximum input without clipping is approximately 2V RMS, beyond which the integrated preamplifier stage will saturate and introduce distortion. If your audio source outputs higher levels (such as professional line-level outputs at +4dBu or 1.23V RMS), use an attenuator pad or reduce the source output level. Monitor the output signal on an oscilloscope or audio analyzer to confirm that the waveform remains undistorted at your desired volume setting. The integrated volume control potentiometer provides fine adjustment to optimize signal levels for your specific audio source.
Does the TPA3116D2 require a preamp or can it connect directly to a microphone?
The TPA3116D2 is a power amplifier designed for line-level signals and cannot directly amplify microphone-level signals (typically 5-50mV). Microphone inputs require a dedicated preamplifier stage with gain of 40-60dB to bring the signal to line-level before feeding the TPA3116D2. You can use a small preamp board, mixing console, or audio interface with microphone input capability. Attempting to connect a microphone directly will result in extremely low output volume and poor signal-to-noise performance due to the amplifier's line-level input impedance and gain structure.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
Buy TPA3116D2 Audio Amplifier with Tone Control Panel, 2 x 80 W (12 – 24 VDC or 12 – 17 VAC) Online in India
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