TDA7492P 50W Wireless Digital Audio Receiver Amplifier Board

TDA7492P 50W Wireless Digital Audio Receiver Amplifier Board is a highly efficient, compact Class-D stereo power amplifier that integrates seamless wireless connectivity with high-fidelity sound reproduction. This power-packed module utilizes the advanced TDA7492P core IC to deliver up to 50W of power through dual Bridge-Tied Load (BTL) channels, eliminating the need for bulky external heatsinks under typical listening levels. Consequently, it serves as the ultimate engine for modern custom audio projects, portable wireless speakers, and DIY sound system restorations. Furthermore, an onboard high-compatibility Bluetooth audio receiver chip processes digital sound directly from mobile devices, ensuring minimal signal degradation and a stable range. Therefore, you should select this high-performance board to convert traditional passive speakers into a robust, high-fidelity wireless sound system.

Key Features:

• High-Efficiency Class-D Amplification: Utilizes a high-frequency switching architecture to maintain a stellar ≈ 90% power efficiency, maximizing runtime for battery-powered setups.
• Wireless Bluetooth Audio Input: Employs a dedicated onboard Bluetooth receiver module with extensive software compatibility, which allows fast, automatic pairing with smartphones and tablets.
• Selectable Gain Control: Features onboard DIP switches to let you adjust the fixed gain settings dynamically among 21.6 dB, 27.6 dB, 31.1 dB, and 33.6 dB.
• Comprehensive Circuit Protection: Integrates automatic thermal overload shutdown and short-circuit protection, preventing permanent IC damage from incorrect wiring or high heat.
• Onboard Navigation Buttons: Includes tactile switches for play, pause, next track, previous track, and volume modification, delivering convenient physical control over your playback stream.

Technical Specifications:

• Amplifier Architecture: Dual BTL Class-D Digital Audio Power Amplifier
• Output Power: 25 W + 25 W (Continuous at 8 Ω load with 20 V_DC input), can reach up to 50 W peak per channel depending on input power and lower impedance loads.
• Supply Voltage Range: 8 V to 24 V_DC (Recommended input via standard 2.1mm power barrel jack)
• Speaker Impedance Compatibility: 4 Ω, 6 Ω, 8 Ω, or 16 Ω passive loudspeakers
• Wireless Connectivity: Onboard Bluetooth V4.0 module (Typically broadcasts as “SANWU Audio”)
• Auxiliary Audio Input: 3.5 mm Stereo Audio Jack (Automatically overrides Bluetooth when plugged in)
• Efficiency (Full Load): ≈ 90%

Mechanical Specifications:

• PCB Material: High-grade FR-4 double-sided glass fiber board with a vibrant red solder mask.
• Terminal Connections: Heavy-duty screw terminals for secure, low-resistance speaker wire clamping.
• Power Port Type: Standard 2.1 mm / 5.5 mm DC barrel connector.
• Control Switches: Five onboard multi-function micro tactile buttons.

Dimensions:

• Board Length: ≈ 82.0 mm
• Board Width: ≈ 50.0 mm
• Total Height: ≈ 18.0 mm (Including connectors and button extensions)
• Weight: ≈ 40.0 g

Pinout and Wiring:

• Power Input (2.1mm DC Jack): Connect a filtered DC power source between 8V and 24V. Make sure the center pin is positive.
• Left Speaker Output (Screw Terminal L+/L-): Connect the positive and negative terminals of your left passive speaker directly to these outputs.
• Right Speaker Output (Screw Terminal R+/R-): Connect the positive and negative terminals of your right passive speaker directly to these outputs.
• Wiring Note: However, never bridge the negative speaker outputs together or connect them to circuit ground, because doing so will bypass the internal BTL configuration and destroy the amplifier chip instantly.

Datasheet Reference:

• Download STMicroelectronics TDA7492P Core IC Datasheet

Commonly Used in:

• Custom Boomboxes: Building rugged, portable, and battery-powered outdoor music players with high runtime requirements.
• Desktop Audio Upgrades: Assembling minimal, space-saving desktop amplifiers to revive vintage hi-fi bookshelf speakers.
• Arcade Machine Sound: Providing compact, highly energetic sound amplification inside arcade cabinets and electronic kiosks.

Applications:

• Wireless Speaker Conversion: Upgrading non-powered passive speakers into Bluetooth-enabled smart speakers.
• Background Music Systems: Driving low-profile ceiling or wall speakers in retail spaces and home multi-room audio zones.
• DIY Audio Prototyping: Testing complex enclosure designs or checking passive crossover components using a portable power stage.

Equivalent Models:

• TPA3116D2 Bluetooth Board: A widely used Class-D alternative that handles higher operational currents, providing an equivalent 2x50W stereo experience.
• TDA7492PE Module: An updated variant from the same STMicroelectronics family, however, layout changes might alter the physical button spacing.
• ZK-502M Bluetooth Board: A modern, chip-on-board alternative utilizing a different base IC that mimics the compact power and wireless feature set.

Package Includes:

• 1 x TDA7492P 50W Wireless Digital Audio Receiver Amplifier Board