XS9871 Super Mini Digital Audio Amplifier Board 5W Mono Class D Class AB 2.5V 5.5V

XS9871 Super Mini Digital Audio Amplifier Board 5W Mono Class D Class AB 2.5V 5.5V delivers robust audio performance within an ultra-compact footprint designed for portable sound projects. This efficient mono amplifier module integrates the reliable XS9871 chip to drive speakers cleanly with up to 5W of output power. Consequently, it serves as an ideal audio solution for handheld electronics, DIY Bluetooth speakers, and miniature sound systems. Furthermore, the flexible power input range accommodates standard USB and single-cell lithium battery sources seamlessly. Therefore, hobbyists and engineers can integrate high-efficiency amplification into space-constrained designs without sacrificing sound clarity.

Key Features:

• High Efficiency Output: Delivers up to 5W of mono audio power while maintaining low thermal dissipation.
• Selectable Operating Modes: Supports switchable Class D and Class AB modes to optimize performance for specific audio profiles.
• Wide Voltage Range: Operates reliably from 2.5V to 5.5V DC, fitting diverse portable power configurations.
• Ultra-Miniature Design: Features a tiny board layout that easily integrates into tight enclosures and handheld projects.
• Low Quiescent Current: Minimizes power consumption during idle states to extend battery life in portable setups.

Technical Specifications:

• Amplifier IC: XS9871
• Channels: 1 (Mono)
• Output Power: 5W max (into 2Ω load at 5V)
• Operating Voltage: 2.5V to 5.5V DC
• Efficiency: ≥ 85% in Class D mode
• THD+N: Low distortion profile for clear voice and music playback

Mechanical Specifications:

• Board Type: Single-sided FR4 PCB with optimized thermal copper pours
• Connection Type: Through-hole solder pads for power, input, and speaker leads
• Mounting: Lightweight structure supported directly by wiring connections
• Profile: Low-profile components suitable for thin device housings

Dimensions:

• Board Length: ≈ 15.0 mm
• Board Width: ≈ 12.0 mm
• Board Height: ≈ 3.0 mm
• Weight: ≈ 1.0 g

Pinout and Wiring:

• VCC: Positive power supply input, connected to 2.5V to 5.5V DC source.
• GND: Common system ground for power and audio signals.
• IN+: Audio input signal positive terminal.
• IN-: Audio input signal negative or ground reference terminal.
• OUT+: Speaker output positive terminal.
• OUT-: Speaker output negative terminal.
• Note: However, always verify power polarity before connecting sources to prevent permanent damage to the onboard amplifier IC.

Datasheet Reference:

• Download Audio Amplifier IC Technical Reference and Documentation

Commonly Used in:

• Portable Speakers: Building pocket-sized music players and miniature Bluetooth sound systems.
• DIY Electronics: Adding voice prompts and audio feedback to microcontroller projects.
• Wearable Audio: Integrating compact sound outputs into custom costumes and smart gear.

Applications:

• Voice Alert Modules: Driving miniature speakers for alarms, chimes, and notification systems.
• Handheld Test Equipment: Providing audible feedback for diagnostic tools and meters.
• Educational Electronics: Teaching students audio amplifier principles and power management.

Equivalent Models:

• PAM8403 Dual Channel Amplifier Board: A popular stereo alternative providing 3W per channel over a 5V supply.
• PAM8302 Mono Class D Amplifier: A comparable single-channel 2.5W amplifier board designed for compact spaces.
• HXJ8002 Mono Audio Amplifier: A classic low-voltage audio driver chip configured for basic mono sound output.

Package Includes:

• 1 x XS9871 Super Mini Digital Audio Amplifier Board 5W Mono Class D Class AB 2.5V 5.5V