MartinFowler

PAM8403 power amplifier

Overview

Power amplifier circuit with PAM8403 as the main control

Use screw terminal blocks for easy wiring

Using the MicroUSB interface, you can supply power if you have a mobile phone charging cable at home

According to the working voltage of PAM8403, the power supply voltage should be between 2.8V ~ 5.5V, so I used USB power supply.

Each channel outputs 3W, and it can work when connected to 1W, 3W, or 5W speakers, but do not connect speakers with excessive power, otherwise the chip will be damaged!

Front side of circuit board Back side of circuit board

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-06-20 00:46:59

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