The XH-M543 High-Power Digital Amplifier Board is a compact, efficient Class-D stereo audio amplifier designed for DIY audio projects, car audio upgrades, home theater systems, and custom speaker builds. This version uses the TPA3116D2 (CHN) chip, a China-manufactured variant of the original Texas Instruments design that offers similar functionality at a more accessible price point for budget-conscious projects and volume production.
At the heart of the board is the TPA3116D2 Class-D audio amplifier, which operates with over 90% power efficiency and low idle loss, significantly reducing heat generation and eliminating the need for large external heat sinks in most applications. The chip supports a wide supply voltage range of 4.5V to 26V, making it compatible with a broad range of power sources including 12V car batteries, 19V laptop adapters, and 24V power supplies.
This XH-M543 board is specifically designed for stereo 2.0 channel output, delivering up to 120W per channel when powered at 24V with 4Ω speakers. The board features onboard volume potentiometers for independent left and right channel adjustment, allowing precise control without external preamplifiers. The 100dB signal-to-noise ratio ensures clean, detailed audio reproduction with minimal background noise.
The board incorporates comprehensive self-protection circuits including overvoltage, undervoltage, overtemperature, DC detection, and short-circuit protection, with fault reporting to prevent damage during overload conditions. The PCB layout uses large capacitance aluminum electrolytic and polyester film capacitors for stable power delivery and audio performance.
Note on the CHN chip variant: The TPA3116D2 (CHN) is a China-manufactured version of the TPA3116D2. It is designed to be functionally compatible with the original chip, offering the same pinout, similar performance characteristics, and comparable audio quality at a lower cost. For applications where the genuine Texas Instruments chip is not required, this variant provides a cost-effective alternative for volume production and budget-sensitive projects.
Whether you are building a portable Bluetooth speaker, upgrading a car audio system, or creating a custom home theater setup, the XH-M543 with TPA3116D2 (CHN) provides a practical, reliable amplification solution. It is suitable for individual makers, students, and businesses purchasing in bulk for product development or educational programs.
Features
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TPA3116D2 (CHN) chip — China-manufactured variant of the proven Class-D amplifier, cost-effective for volume production
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2×120W stereo output — High-power dual-channel amplification for demanding audio applications
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>90% power efficiency — Class-D operation reduces heat and eliminates need for large heat sinks
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Wide voltage range — Operates from DC 12V to 26V (24V recommended)
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Onboard volume control — Independent left and right channel potentiometers for precise adjustment
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100dB signal-to-noise ratio — Clean, detailed audio reproduction
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Comprehensive protection — Overvoltage, undervoltage, thermal, DC, and short-circuit protection
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Compact form factor — 92×68×17mm board fits easily into custom enclosures and car installations
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Amplifier Chip | TPA3116D2 (CHN) Class D |
| 2 | Channels | 2.0 (Stereo) |
| 3 | Output Power | 2×120W (max) |
| 4 | Supply Voltage | DC 12V – 26V (24V recommended) |
| 5 | Signal-to-Noise Ratio | 100dB |
| 6 | Speaker Impedance | 4–8Ω recommended |
| 7 | Power Efficiency | >90% |
| 8 | Board Dimensions | 92 × 68 × 17 mm |
