The TPA3118 60W Mono Audio Amplifier Board is a powerful, efficient, and compact Class-D audio amplifier designed for high-quality sound output in DIY audio systems, portable speakers, home audio projects, and professional audio applications. Powered by a flexible 4.5V–24V DC supply, this amplifier can drive up to 60W into an 8Ω speaker with low distortion, high fidelity, and excellent power efficiency.

Featuring integrated protection circuits, advanced switching frequency control, AM-interference avoidance, and support for differential/single-ended inputs, the TPA3118 offers premium audio performance even in challenging environments. Its onboard mute port, clear board legend, and simple wiring make it ideal for both beginners and professional audio designers in Bangladesh.

Features:

• Wide operating voltage range: 4.5V–24V DC for flexible power options

• Class-D high-efficiency digital amplifier delivering up to 60W output

• Supports 8Ω speakers with clean, distortion-free audio

• Multiple switching frequencies supported for optimized performance

• AM-interference avoidance for noise-free sound in RF-sensitive environments

• Master/slave synchronization for multi-amplifier setups

• High switching frequency capability up to 1.2 MHz

• Feedback power-stage architecture for stable and accurate audio output

• Supports differential and single-ended audio input modes

• Stereo/mono modes with single-filter mono configuration

• Full protection suite: short circuit, over-temperature, over-voltage, under-voltage, DC detect

• Clear pin labeling for easy wiring and installation

• Suitable for DIY speakers, home audio, studio monitors, and portable sound systems

Specifications:

• Amplifier Chip: TPA3118

• Output Power: Up to 60W (8Ω speaker)

• Operating Voltage: 4.5V–24V DC

• Audio Input: Differential and Single-Ended supported

• Protection: Over-voltage, Under-voltage, Short-circuit, Thermal protection, DC-detect

• Switching Frequency: Up to 1.2 MHz

• Dimensions: 13cm × 11cm × 6cm

Pinout Description:

Audio In (+)

• Positive audio input signal

Audio In (–)

• Negative audio input signal

Mute (Short Circuit Port)

• Jumper-controlled mute activation

Power In (VCC/+)

• 4.5V–24V power supply positive

Power In (GND/–)

• Power supply ground

Speaker Out (+)

• Positive speaker output

Speaker Out (–)

• Negative speaker output

The board legend clearly marks each pin for fast and accurate wiring.

How to Use:

• Connect a 4.5V–24V DC power supply to the VCC and GND pins

• Connect your audio source to the Audio In (+/–) pins using differential or single-ended input

• Attach an 8Ω speaker to the Speaker Out (+/–) terminals

• Use the mute jumper if silent mode is required during setup

• Ensure proper heat dissipation when using higher output power

• Keep audio input cables shielded for best performance

• Avoid reversing polarity to prevent circuit damage

Application Instructions:

• Ideal for DIY Bluetooth speakers, multimedia speakers, subwoofer systems, and custom audio builds

• Can be used for home audio projects requiring high power and efficiency

• Suitable for car audio modifications when paired with a stable power source

• Provides clean amplification for studio monitors and desktop audio systems

• Integrate with DAC boards, Bluetooth modules, and audio preamps for complete sound setups

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