SparkFun Mono Audio Amp Breakout - TPA2005D1

The SparkFun Mono Audio Amp Breakout - TPA2005D1 is a compact audio amplifier that utilizes the Texas Instruments TPA2005D1. This efficient class-D amplifier ensures low heat generation and extended battery life. It is capable of driving an 8-Ohm speaker at up to 1.4 Watts, making it an excellent choice for various audio projects.

The amplifier features fully-differential inputs that are safe for both floating and ground-referenced audio signals. This makes it compatible with a variety of audio sources, including the MP3 Shield from SparkFun. A shutdown input is included to conserve power when the amplifier is not in use. A solder jumper and header are also provided for the connection of a volume-control potentiometer (not included).

The class-D design of the amplifier outputs a 250kHz PWM-like signal that is converted back to an analog voltage in the speaker's coil. This unique feature contributes to the amplifier's efficiency. However, to minimize potential interference from the switching frequency, it is advisable to keep the amplifier as close to the speaker as possible.

Key Features:

• Highly efficient class-D amplifier
• Output power of 1.4W into 8 Ohms
• Operates on a supply voltage of 2.5V to 5.5V
• Fully differential audio inputs, compatible with ground-referenced signals
• Shutdown input with pullup and LED-follows-shutdown circuitry
• PTH pads for changing gain resistors if needed
• Solder jumper and header for adding a 10k volume control potentiometer (not included)

Documentation:

• Schematic
• Eagle files
• Datasheet (TPA2005D1)
• Quickstart Guide
• GitHub