Digital mono amplifier module, 8?24 V DC, max.60 W
Description
Digital mono amplifier module, 8?24 V DC, max.60W
The TPA3118 Mono Digital Audio Amplifier Board is an extremely compact and efficient Class-D audio module. It utilizes the PBTL (Parallel Bridge-Tied Load) configuration, where the internal stereo channels are bridged to output a powerful mono signal with up to 60 watts of output power to a single speaker. Due to its high energy efficiency, the module requires virtually no additional cooling during normal operation. Amplifier Chip [Texas Instruments TPA3118] Operating Voltage: DC 8V to 24V Max. Output Power: 60 Watts (at 24V supply voltage) Supported Impedance: 4 to 8 Ohms (8 Ohms optimal for best sound) Energy Efficiency: ~90% to 93% (minimal heat generation) Dimensions: approx. 45 mm x 35 mm Weight: approx. 12gPinout / Connection Layout
The board typically features 8 primary solder pads:
- 1. Power Supply (Power In): VCC / 12-24V: Positive terminal of the DC power source. Recommendation: A power supply with 19V to 24V and at least 3?4 Amps provides the most stable performance. GND: Negative terminal (Ground).
2. Audio Input (Audio In): IN / Audio +: The positive audio signal (e.g., from a Bluetooth module, smartphone, or jack socket). GND / Audio -: Audio signal ground. Note for stereo sources: Since this is a mono board, the left and right signals of a stereo source should be combined via two 1 kOhm resistors or only one channel should be used to prevent short circuits in the source device.
3. Speaker Output (Speaker Out): OUT+ / OUT-: Direct connection to the speaker driver. Caution: Never short-circuit the speaker ground with the power supply ground! 4. Mute (Optional): Two separate contacts that mute the amplifier (standby mode) when bridged (via jumper or switch).
? Important Application & Safety Notes Integrated protection circuits: Thanks to the TI chip, the board is well protected out of the box against short circuits, overheating, as well as under- and overvoltage. Cooling under full load: For continuous operation at the power limit (e.g., 4-Ohm subwoofer at 24V), it is recommended to stick a small aluminum heatsink onto the chip. Applications: Perfectly suited for building DIY Bluetooth speakers, portable boomboxes, small subwoofers, or sound upgrades for smart home projects (e.g., with Raspberry Pi or Arduino).