PAM8302 Mono 2.5W Class D Audio Amplifier Module — 4Ω/8Ω, 24dB Gain, Filterless

PAM8302 Mono 2.5W Class D Audio Amplifier Module — 4Ω/8Ω, 24dB Fixed Gain, Filterless

The PAM8302 amplifier module delivers 2.5W of mono Class D audio output in a compact, filterless design. With a fixed 24dB gain, 50dB PSRR, and built-in thermal and overcurrent protection, it is the ideal audio output stage for Arduino speaker projects, IoT voice alerts, Raspberry Pi audio, and portable sound devices powered by 2.5–5.5V supplies.

Key Specifications

Parameter	Value
IC	PAM8302A
Output Power	2.5W (into 4Ω at 5V)
Supply Voltage	2.5V – 5.5V
Load Impedance	4Ω or 8Ω
Gain	24dB (fixed)
PSRR	50dB
THD+N	<0.1% (at 1W, 1kHz)
Efficiency	>85% (Class D)
Filterless	Yes (no LC output filter needed)
Protections	Thermal shutdown, overcurrent (OCP)
Shutdown Pin	Yes (active low)

PAM8302 vs PAM8403 — Which to Choose?

Feature	PAM8302	PAM8403
Channels	Mono (1 channel)	Stereo (2 channels)
Output Power	2.5W × 1	3W × 2
Supply Voltage	2.5V – 5.5V	2.5V – 5.5V
Best For	Single speaker, voice alerts, IoT	Stereo speakers, music playback

Why Choose PAM8302?

• ✅ Filterless Class D — no external LC filter required, minimal BOM
• ✅ 2.5–5.5V supply — runs directly from 3.3V or 5V microcontroller power rail
• ✅ 50dB PSRR — rejects power supply noise for clean audio output
• ✅ Shutdown pin — enable/disable amplifier via GPIO for power saving
• ✅ Thermal + OCP protection — safe for continuous operation
• ✅ Compact module — easy to integrate into small enclosures

Typical Applications

• Arduino speaker output for voice alerts and tones
• Raspberry Pi audio amplifier for small speakers
• IoT device audio notification output
• Portable Bluetooth speaker build (mono)
• Intercom and doorbell audio stage
• Wearable electronics audio output

Package Contents

• 1 × PAM8302 Mono Class D Audio Amplifier Module

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