TPA3116D2 12 to 24V DC Dual Channel 2 x 80W Audio Power Amplifier

The TPA3116D2 is a high-efficiency Class D audio power amplifier module capable of delivering 2 x 80W output power across dual channels from a compact 12-24V DC power supply. Audio engineers, DIY enthusiasts, and professional integrators use this amplifier for portable sound systems, car audio installations, and embedded audio applications requiring high power density in minimal space. This amplifier solves the critical challenge of delivering studio-quality audio amplification without the heat dissipation and power consumption drawbacks of traditional Class AB amplifiers.

Product Overview

The TPA3116D2 employs Texas Instruments' proprietary Class D amplification topology, which achieves efficiency ratings exceeding 90 percent by using high-frequency pulse-width modulation to switch audio signals rather than continuously conducting current. This architecture enables the amplifier to deliver substantial power output while maintaining thermal stability and minimal heat generation, making it ideal for battery-powered and space-constrained applications. The dual-channel configuration allows independent control of left and right audio channels, with integrated protection circuits including thermal shutdown, DC offset detection, and short-circuit protection that safeguard both the amplifier and connected speakers from damage.

The TPA3116D2 operates across a wide input voltage range of 12 to 24V DC, providing flexibility for automotive, industrial, and portable audio systems. The amplifier features low-noise audio input stages with adjustable gain, allowing seamless integration with microphone preamps, line-level audio sources, and digital audio interfaces. On-board filtering and compensation networks minimize electromagnetic interference and ensure clean audio reproduction across the full frequency spectrum from 20Hz to 20kHz, meeting professional audio standards while maintaining the compact form factor essential for embedded applications.

Key Specifications

Specification	Details
Product Type	Class D Dual Channel Audio Power Amplifier Module
Integrated Circuit	TPA3116D2 (Texas Instruments)
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 at 4 Ohms (1kHz, THD+N less than 1 percent)
Supply Voltage Range	12V DC to 24V DC
Frequency Response	20Hz to 20kHz (audio band)
Input Impedance	10kOhms (RCA line-level inputs)
THD+N	Less than 1 percent at rated output power
Amplifier Class	Class D (High Efficiency)

Key Features

• High-Efficiency Class D Amplification: Delivers 2 x 80W output power with over 90 percent efficiency, minimizing power loss and heat generation for extended operation on battery or limited power supplies
• Wide Supply Voltage Range: Operates reliably from 12V to 24V DC, accommodating automotive electrical systems, industrial power supplies, and portable battery packs without external regulators
• Dual Independent Channels: Separate left and right audio channels with individual gain control, enabling stereo audio reproduction and flexible mixing configurations
• Integrated Protection Circuitry: Includes thermal shutdown, DC offset protection, and short-circuit detection to prevent amplifier and speaker damage during fault conditions
• Low-Noise Audio Input Stage: Adjustable input gain with minimal noise floor, suitable for both high-level line inputs and low-level microphone preamplifier outputs
• Compact Module Design: Space-efficient PCB layout with all components integrated on a single board, ideal for embedded audio systems and portable applications

Applications and Use Cases

• Automotive Audio Systems: Powers door speakers, subwoofers, and full-range systems in vehicles with 12V or 24V electrical systems, providing high-fidelity audio without drawing excessive current from vehicle alternators
• Portable Sound Systems: Drives active speaker cabinets and powered monitors in mobile DJ rigs, live event sound reinforcement, and portable PA systems powered by rechargeable lithium battery packs
• Home Audio Amplification: Amplifies audio from streaming devices, turntables, and digital media players to drive passive bookshelf speakers or custom speaker installations in compact spaces
• Industrial and Embedded Audio: Provides audio output for warning systems, announcement systems, and multimedia installations in industrial equipment, kiosks, and IoT audio applications
• DIY Audio Projects: Powers custom speaker builds, retro audio restoration projects, and experimental audio installations where space and power efficiency are critical design constraints

How to Use

To set up the TPA3116D2 amplifier, first ensure your DC power supply can deliver sufficient current for your desired output level. Connect the positive and negative terminals of your 12-24V DC power supply to the amplifier's power input terminals, observing correct polarity to prevent damage. Connect your audio source (line-level RCA outputs from a preamp, mixer, or audio interface) to the left and right input connectors on the amplifier module. Use the on-board gain adjustment potentiometers to set the input sensitivity to match your audio source level, typically starting at the midpoint and adjusting for clean amplification without clipping.

Connect your speakers to the amplifier's output terminals using appropriate gauge speaker wire based on the impedance and distance involved. For 4-Ohm speakers at rated power, use at least 14 AWG wire for runs under 10 meters. Ensure all ground connections are secure and isolated from signal ground loops to minimize hum and noise. Power on the system and gradually increase the input signal level while monitoring the audio output for clean reproduction without distortion. If the amplifier enters thermal shutdown (indicated by reduced output or LED status), allow cooling time and reduce the continuous output power or improve ventilation around the amplifier module.

Frequently Asked Questions

What is the difference between Class D and Class AB amplification?

Class D amplifiers use high-frequency pulse-width modulation to switch audio signals on and off, achieving efficiency rates exceeding 90 percent with minimal heat generation. Class AB amplifiers use continuous current conduction, resulting in 50-70 percent efficiency and significant heat dissipation. The TPA3116D2's Class D design enables high power output from compact modules without large heatsinks, making it ideal for portable and space-constrained applications.

Can I use the TPA3116D2 with both 12V and 24V power supplies?

Yes, the TPA3116D2 is designed to operate across the full 12V to 24V DC range. At 12V, the amplifier delivers approximately 2 x 50W into 4-Ohm loads. At 24V, it reaches the full rated 2 x 80W output. You can switch between different voltage supplies without component changes, making it flexible for various applications from automotive (12V) to industrial systems (24V).

What speaker impedance should I use with this amplifier?

The TPA3116D2 is rated for 4-Ohm speaker loads at full power output. You can use 8-Ohm speakers, which will reduce output power to approximately 2 x 40W but provide safer operation margins. Never connect speaker impedances below 4 Ohms, as this will exceed the amplifier's maximum current rating and trigger protection circuits. Always verify speaker impedance specifications before connection.

How much current does the TPA3116D2 draw from the power supply?

At full output power (2 x 80W into 4-Ohm loads at 12V), the amplifier draws approximately 13-15 amperes from the 12V supply. At 24V, current draw is approximately 6-8 amperes for the same output power. Ensure your power supply can deliver at least 20 percent more current than calculated for safe operation and to prevent voltage sag during peak audio transients.

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.

Why Buy from The Engineer Store

• Genuine Products: Sourced directly from authorized distributors with authentication
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• Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
• Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
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• Technical Support: 24/7 expert guidance via email and WhatsApp
• Returns: 7-day return policy on manufacturing defects only

Buy TPA3116D2 12 to 24V DC Dual Channel 2 x 80W Audio Power Amplifier Online in India

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