The HW-644 is a compact and highly efficient Class D stereo amplifier module based on the TPA3110 chip. It is designed to deliver reliable 15W per channel output, making it an ideal choice for DIY Bluetooth speakers, small desktop audio setups, and low-power audio projects.

Specifications

• Amplifier Chip: TPA3110 
• Operating Voltage: DC 8V to 24V 
• Output Power: 15W x 2 (Stereo) 
• Output Impedance: 4 ohm to 8 ohm 
• Signal to Noise Ratio: 100dB 
• Current: More than 2A recommended

Features

• High Efficiency Class D: Operates with over 90?ficiency, significantly reducing heat generation and allowing for a slim design without a bulky heatsink. 
• Surface Mount Design (SMD): Features a low-profile construction that is easy to integrate into slim enclosures or tight mounting spaces.
• Filter-Free Architecture: Designed to drive speakers directly without the need for complex output filters, simplifying the build process.
• Integrated Protection: Built-in safeguards protect the module against overvoltage, undervoltage, overheating, and short circuits. 
• Stable Audio Performance: Provides a high signal-to-noise ratio for clear, hiss-free audio reproduction at moderate volume levels.
• Easy Connectivity: Clearly marked solder points for Power (+/-), Audio Input (L/R/GND), and Speaker Outputs (L+/- and R+/-).

Common Applications

• Building small portable 2.0 channel stereo speakers.
• Adding audio output to arcade machines or electronic kiosks.
• DIY Bluetooth speaker upgrades (when paired with a separate BT receiver).
• Sound reinforcement for hobbyist robotics and IoT projects.