PAM8403 2x3W Class-D Stereo Audio Amplifier Module
Filterless 3W stereo Class-D audio amplifier operating from 2.5V to 5.5V DC, delivering high efficiency (up to 90%) and low noise without bulky output low-pass filters.
Aliase:PAM8403, Mini 5V Amplifier, Class-D Audio Board
Module Terminal Pinout
9 Pins
Pin-Tabelle9
| Pin | Signal / Name | Typ | Alternative Funktionen |
|---|---|---|---|
| 1 | +5V | Power | Power Supply Input (+2.5V to +5.5V DC) |
| 2 | GND | Ground | Power Supply Ground (0V) |
| 3 | L_IN | Analog | Left Channel Audio Input |
| 4 | G_IN | Ground | Audio Signal Ground |
| 5 | R_IN | Analog | Right Channel Audio Input |
| 6 | L_OUT+ | Analog | Left Speaker Positive Output (BTL) — Bridge-Tied Load; connect directly to speaker; do NOT connect to ground |
| 7 | L_OUT- | Analog | Left Speaker Negative Output (BTL) — Bridge-Tied Load; differential pair with L_OUT+ |
| 8 | R_OUT+ | Analog | Right Speaker Positive Output (BTL) — Bridge-Tied Load; max 3W into 4Ω at 5V |
| 9 | R_OUT- | Analog | Right Speaker Negative Output (BTL) — Bridge-Tied Load; differential pair with R_OUT+ |