PAM8403 Mini 5V Audio Amplifier Board with Switch Potentiometer

Description

1. Amplification: The primary function of the PAM8403 board is to amplify audio signals. It can take low-level audio signals from sources like smartphones, MP3 players, or microcontrollers and amplify them to drive speakers or headphones.
2. Class D Amplifier: The PAM8403 utilizes a Class D amplifier configuration, which is known for its high efficiency and low power consumption. Class D amplifiers are particularly suitable for battery-powered devices.
3. Operating Voltage: The module typically operates at a voltage of 5V, making it compatible with USB power sources, lithium-ion batteries, or other 5V power supplies.
4. Power Output: The board can provide a substantial amount of power output, often ranging from 3W to 5W per channel, depending on the model and configuration.
5. Stereo Output: It provides stereo audio output, which means it can amplify and drive two speakers or two audio channels independently.
6. Potentiometer (Pot): The module features a built-in potentiometer (variable resistor) that allows you to adjust the audio volume. Turning the potentiometer clockwise or counterclockwise changes the amplification level.
7. On/Off Switch: Some versions of the board include an on/off switch that allows you to power the amplifier on or off easily.
8. Input Connections: The module typically has input terminals for connecting audio sources. These terminals may be labeled as “INL” and “INR” for left and right audio channels, respectively.
9. Speaker Connections: There are output terminals for connecting speakers or headphones. You can often find these labeled as “OUTL” and “OUTR” for left and right channels.
10. Compact Size: The PAM8403 amplifier board is compact and lightweight, making it suitable for integration into small projects and portable devices.
11. Thermal Protection: Some versions of the module include thermal protection circuitry to prevent overheating and damage to the amplifier.
12. Filter Capacitors: Filter capacitors are often included to help reduce noise and improve audio quality.
13. Applications: This amplifier board is used in various applications, such as DIY speakers, portable audio players, Bluetooth speakers, and educational projects.