Please note: While we strive for accuracy in our descriptions and images, the actual color and appearance of the items may vary slightly from the photographs due to lighting conditions or varying computer monitor settings.

PAM8403 Power Audio Amplifier Board

K-TECHNICS
Only 3 left
KSh200.00

Secure checkout

Friendly support

Hassle-free returns

The PAM8403 is an ultra-compact, high-efficiency 2-channel x 3W Class D digital audio power amplifier board. It is widely used for DIY portable speakers, Arduino or microcontroller audio projects, and USB-powered sound systems.
Technical Specifications
  • Output Power: 3W + 3W (Dual-channel stereo into a 4Ω load at 5V).
  • Operating Voltage: 2.5V to 5.5V DC (Highly compatible with 5V USB power or a single 3.7V Lithium-ion battery).
  • Efficiency: Up to 90%, meaning it generates very little heat and requires no bulky heatsink.
  • Architecture: Filterless Class D design allows direct speaker connection without external low-pass LC filters.
  • Safety Features: Short-circuit protection, over-temperature shutdown, and under-voltage lockout. 
Pin Configuration Guide
  • Power Input: +5V (or VCC) and GND.
  • Audio Input: L (Left Channel Input), R (Right Channel Input), and GND (Audio Ground reference).
  • Speaker Outputs: Separate L+, L- and R+, R- pins to hook up individual 4Ω to 8Ω small speakers. 
Critical Usage Warnings
⚠️ Do Not Share Speaker Grounds: The left and right channel "negative" (-) speaker outputs must never be connected together or wired to a common ground. Doing so will instantly destroy the PAM8403 IC.
⚠️ Voltage Limits: Never exceed a 5.5V DC supply. Do not power the module using four standard AA dry cells without a regulator, as new batteries can exceed 6.0V and burn out the chip.
⚠️ Connect Speakers First: Always connect the speaker loads before applying power to prevent chip damage.

Ensure your order is placed by 2PM to guarantee next-day delivery! Our commitment to prompt service includes a 24-hour delivery system through our network of carriers, aimed at ensuring your package arrives right on schedule.

Please note, a delivery fee of €4.99 applies for orders under €50. For those in remote areas, be aware that our couriers may apply an extra surcharge. This additional fee helps cover the costs of transporting your items to harder-to-reach locations.