M5Stack M5StickC Speaker Hat PAM8303

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3 W Class-D Speaker HAT with PAM8303 Amplifier for M5StickC Audio Applications
The M5Stack U055 Speaker HAT is a compact audio-output module designed for M5StickC series controllers. It integrates the PAM8303 single-channel Class-D audio power amplifier and an onboard speaker, providing a convenient way to add sound output to embedded projects. With up to 3 W output power at a 5 V supply and 4 Ohm load, the module is suitable for voice prompts, alarms, notification tones, and other compact audio applications.
The PAM8303 amplifier provides high PSRR and a differential-input architecture to help reduce power-supply noise and RF interference during audio playback. The module operates from 2.8 V to 5.5 V and features ultra-low EMI performance, specified at 20 dB better than the FCC Class B limit at 300 MHz. Built-in short-circuit protection and low idle noise further support reliable integration into portable, IoT, and interactive M5StickC projects.
Key Features

PAM8303 Amplifier: Integrates a single-channel Class-D audio power amplifier for compact speaker applications.
3 W Audio Output: Delivers up to 3 W output power from a 5 V supply with a 4 Ohm load at 10% THD.
Wide Operating Voltage: Supports a supply-voltage range from 2.8 V to 5.5 V.
Class-D Architecture: Provides efficient audio amplification for battery-powered and embedded systems.
Low EMI Performance: EMI performance is specified at 20 dB better than FCC Class B requirements at 300 MHz.
Differential Input: Helps reduce susceptibility to common-mode noise and RF interference.
High PSRR: Supports cleaner audio reproduction by reducing power-supply noise.
Low Idle Noise: Designed for ultra-low noise when no input signal is present.
Short-Circuit Protection: Integrated protection helps safeguard the amplifier during output short-circuit conditions.
M5StickC Compatibility: Designed for convenient integration with compatible M5StickC controllers.
Compact Audio Expansion: Adds speaker functionality without requiring a separate external amplifier board.

Applications

M5StickC audio projects
Voice-prompt systems
Audible alarms
Notification tones
IoT devices
Interactive electronic projects
Portable embedded systems
Human-machine interfaces
Timer and reminder devices
Robotics
Status-alert systems
Educational electronics projects

Model Size

Package Includes:

1 x Hat SPK
1 x Double-Sided Tape