Overview: The TPA3116D2 2x50W Class D Audio Amplifier Module is a high-efficiency, compact stereo power amplifier board designed for driving speakers in home audio systems, portable sound setups, and DIY projects. Utilizing Texas Instruments’ TPA3116D2 digital amplifier IC, this module delivers clear, low-distortion sound with minimal heat generation due to its Class D topology. It supports dual-channel (stereo) output up to 50W per channel at 4Ω load, making it ideal for Bluetooth speakers, car audio upgrades, and multimedia devices. The board features a robust blue heatsink for thermal dissipation and operates efficiently from a single DC power supply.
Key Specifications:
Parameter
Value/Detail
IC Chip
TPA3116D2 (Class D)
Output Power
2x50W (at 24V/4Ω, THD+N <10%) 2x30W (at 12V/4Ω)
Input Voltage Range
8V – 28V DC (recommended 12V-24V)
Input Sensitivity
0.775V RMS (for full output)
Frequency Response
20Hz – 20kHz (±0.5dB)
Total Harmonic Distortion (THD)
<0.1% (1W/1kHz)
Signal-to-Noise Ratio (SNR)
>100dB (A-weighted)
Efficiency
Up to 92%
Speaker Impedance
4Ω – 8Ω
Dimensions
Approx. 80mm x 45mm x 35mm (with heatsink)
Weight
~50g
Operating Temperature
-40°C to +85°C
Connections:
Power Input (+/–): DC jack or screw terminals for 8-28V supply (positive to +, ground to –).
Audio Input (L/R): 3.5mm stereo jack or RCA/phono inputs for left and right channels.
Speaker Outputs (L+/L–, R+/R–): Screw terminals for connecting 4-8Ω speakers (polarity matters for optimal performance).
Mute/GND: Optional mute pin for external control; shared ground for inputs.
No need for additional filters; direct connection to power and speakers.
Features and Benefits:
High Power and Efficiency: Delivers punchy bass and clear highs with Class D switching, consuming less power than traditional Class AB amps—perfect for battery-powered applications.
Low Distortion Audio: Advanced modulation ensures high-fidelity sound with minimal noise, suitable for music, TV, or gaming setups.
Thermal Management: Integrated blue aluminum heatsink prevents overheating during prolonged use; no external cooling required for moderate volumes.
Easy Integration: Pre-assembled board with solder pads and screw terminals for quick prototyping; supports bridging for mono 100W output if needed.
Protection Circuitry: Built-in safeguards against over-voltage, under-voltage, over-temperature, and short circuits for reliable operation.
Compact Design: Blue PCB layout optimizes space, fitting easily into enclosures or custom builds.
Applications:
Home theater systems and bookshelf speakers.
Portable Bluetooth/wireless audio devices.
Automotive sound upgrades and subwoofers.
DIY audio projects, Raspberry Pi/Arduino amps, and karaoke machines.
Professional PA systems on a budget.
Note: Ensure proper ventilation around the heatsink and use within voltage/current limits to avoid damage. Test with a multimeter for correct wiring, and pair with matched speakers for best results. Not waterproof—use in dry environments.
