TPA3118 BTL 60W Mono Digital Audio Amplifier Board
The TPA3118 60W Mono Amplifier Board is a high-performance Class-D digital audio amplifier designed for DIY speaker systems, subwoofer builds, and embedded audio applications. Operating from 12V to 24V DC, it delivers powerful and efficient amplification with low distortion and minimal heat.
Why Choose the TPA3118 Amplifier?
- Up to 60W mono output (BTL configuration)
- Wide operating voltage: 12V–24V DC
- High efficiency Class-D design
- Low total harmonic distortion (THD)
- Compact board for custom enclosures
- Built-in protection features (over-current, thermal, short circuit)
What You Can Build
- High-power Bluetooth speaker system
- DIY subwoofer amplifier
- Active speaker enclosure
- Car or 12V audio prototype system
- Raspberry Pi or media center audio upgrade
How It Works
The TPA3118 uses a Class-D switching amplifier architecture. Instead of continuously varying voltage like linear amplifiers, it switches output transistors at high frequency, significantly improving efficiency and reducing heat generation.
In BTL (Bridge-Tied Load) mode, the amplifier drives the speaker differentially, allowing higher output power without requiring a negative power supply.
Technical Specifications
| Amplifier IC | TPA3118 (Texas Instruments) |
|---|---|
| Amplifier Type | Class-D (BTL Mono) |
| Operating Voltage | 12V – 24V DC |
| Maximum Output Power | Up to 60W (24V, 4Ω, depending on board configuration) |
| Recommended Speaker Impedance | 4Ω – 8Ω |
| Efficiency | Up to 90% |
| Protection Features | Over-current, Over-temperature, Short-circuit |
Connection Overview
- VCC – 12V–24V DC input
- GND – Ground
- Audio IN – Signal input
- Speaker OUT – Connect directly to 4Ω–8Ω speaker (BTL output, do not connect speaker negative to ground)
Important Notes
- Use a stable and sufficient current power supply (higher power requires higher current).
- Ensure proper ventilation when operating at high power levels.
- Output power depends on supply voltage and speaker impedance.
- Do not short the speaker outputs; BTL configuration is differential.
External Resources
What’s in the Box?
- 1 × TPA3118 BTL 60W Mono Amplifier Board
TPA3118 BTL 60W DC 12V-24V Mono Digital Audio Power Amplifier Board
TPA3118 BTL 60W DC 12V-24V Mono Digital Audio Power Amplifier Board
22 in stock
Product Code
SKU:2731
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