OEP30W Mono Class D Digital Amplifier Board – 12V High Power Audio Module (10W/15W/20W) with Differential Input, TDA8932 Based

SKU: FA2006-7-0
Amplifier Chip

TDA8932 (or equivalent high-performance chip)

Amplifier Type

Mono Class D Digital

Channels

1 (Mono Channel)

Output Power

10W/15W/20W (typical) up to 30W max

Input Voltage

DC 10V ~ 30V (12V recommended for 20W output)

Output Impedance

4Ω ~ 8Ω (4Ω recommended for higher power)

Efficiency

>90%

Protection

Over/Under Voltage, Short Circuit

Dimensions

Approx. 35mm x 30mm

The OEP30W Mono Class D Digital Amplifier Board is a highly efficient single-channel audio power module capable of delivering up to 30 watts of power. Based on the robust TDA8932 chip (or a similar high-performance equivalent), this board is designed for high-power mono applications and features differential inputs for superior noise rejection, making it ideal for professional and DIY audio systems.
Description
The OEP30W Mono Class D Digital Amplifier Board provides a powerful, compact, and energy-efficient solution for various mono audio amplification needs, such as subwoofers, public address (PA) systems, or single-speaker installations. Utilizing Class D technology, this module achieves efficiencies often exceeding 90%, which significantly reduces power consumption and heat generation compared to traditional linear amplifiers.
The board operates within a flexible DC input voltage range, typically 10V to 30V (12V recommended for 20W output, higher voltage for max 30W output). Its maximum power output is dependent on the input voltage and speaker impedance, capable of producing 10W, 15W, 20W, or up to 30W under optimal conditions (e.g., 25V supply into a 4Ω speaker).
A key feature of the OEP30W is its differential input capability. This design allows the board to effectively reject common-mode noise and interference, resulting in a cleaner audio signal, particularly over long cable runs or in electrically noisy environments like industrial settings or car audio systems. The board also incorporates protection features such as over-voltage protection, under-voltage protection, and short-circuit protection for reliable operation. The compact size and high power density make it an excellent choice for both hobbyist projects and commercial product integration.
Features
  • High-Efficiency Class D Technology: Ensures over 90% power efficiency, reducing heat output and power consumption.
  • Mono Channel Output: Dedicated single channel design for focused high-power applications (e.g., subwoofers, PA systems).
  • Variable Power Output: Delivers 10W/15W/20W/30W depending on input voltage and load impedance.
  • Wide Voltage Operation: Operates reliably from DC 10V to 30V (12V recommended for general use).
  • Differential Audio Input: Features differential inputs for excellent noise rejection and a clean audio signal.
  • Protection Features: Built-in protections including over-voltage, under-voltage, and output short-circuit protection.
  • Compact Design: Small form factor facilitates integration into tight enclosures and various projects.
Usage
The OEP30W amplifier board is designed for integration into various mono audio systems:
  1. Power Connection: Connect a stable DC power source (10V-30V, at least 2A current recommended) to the power input terminals. Ensure correct polarity (positive/negative).
  2. Speaker Connection: Connect a single passive speaker (4Ω or 8Ω impedance) to the speaker output terminals (SPK+/-).
  3. Audio Input: Connect your audio source to the input pads. For differential input, connect the positive input signal to IN+, the negative input signal to IN-, and the ground to GND. This helps reject noise.
  4. Configuration: Note that the output power depends on the input voltage and speaker impedance. Use a 12V supply for typical 20W output, or higher voltage up to 30V for maximum power into a 4Ω load.
Q: Can I use this board for stereo sound?
No, this is a mono (single channel) amplifier board. For stereo applications, you would need two of these boards or a dedicated stereo amplifier module.
Q: What is the benefit of the "differential input"?

The differential input significantly improves noise immunity by focusing on the difference between the positive and negative input signals. This results in a cleaner, clearer audio output, especially useful in environments where electrical noise might interfere with the audio signal

Q: Can I power this board with a 12V car battery?

Yes, the board is compatible with a 12V DC power source. At 12V, it can typically output around 20W into a 4Ω speaker

Q: How much power supply current do I need?

For optimal performance, a power supply capable of providing at least 2 Amps is recommended. If driving the amplifier to its full 30W capacity at higher voltages, a power supply rated for 3 Amps or higher might be necessary

Q: Does this module produce a lot of heat?

No. As a high-efficiency Class D amplifier (>90% efficiency), it generates very little heat during operation, even at high output levels