Efficient Filter-Free 18W Class-D Audio Amplifier 

Tailored for Bluetooth speakers, wireless doorbells, surveillance systems, and handheld gaming consoles, this amplifier combines good sound quality with superior efficiency for modern consumer electronics.

Nuvoton Technology unveils the NAU82110YG, a new Class-D mono audio amplifier designed to deliver powerful, high-quality sound with exceptional efficiency and minimal external components. Offering up to 18W output at 4 Ω or 10W at 8 Ω, this latest solution is purpose-built for a wide range of consumer applications including Bluetooth speakers, wireless doorbells, outdoor surveillance systems, and handheld gaming consoles.

With today’s consumers expecting crisp, immersive audio alongside energy-efficient design, it offers an ideal balance of performance, flexibility, and protection in a compact form factor. This advanced amplifier eliminates the need for an external output filter, the company’s proprietary spread-spectrum oscillator technology combined with slew-rate control, significantly minimizing EMI (electromagnetic interference). Delivering a signal-to-noise ratio (SNR) of 103 dB and an outstanding power supply rejection ratio (PSRR) of over 83 dB at 217 Hz, the NAU82110YG ensures clean, reliable sound reproduction — even in challenging environments.

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Key features include:

• Configurable Gain Control: Offers 32 fine-tuned gain levels via I²C, or five preset hardware options (0 dB, 20 dB, 24 dB, 32 dB, 36 dB).
• Comprehensive Protection: Built-in overcurrent, overvoltage, undervoltage lockout, overtemperature, and anti-clipping protections safeguard both the device and connected speakers.
• Flexible Input Support: Compatible with both single-ended and differential input modes.
• Compact Package: Offered in a space-saving QFN20 form factor, rated for temperatures from -40°C to 105°C.

It also features a low quiescent current of 6 mA at 12V and a fast startup time of 4.6 ms via its chip-enable pin, making it ideal for battery-powered devices and designs where responsiveness is key. It sets a new benchmark for power-efficient, high-performance audio in modern consumer electronics. Whether designing smart home devices or portable entertainment systems, this new Class-D amplifier ensures exceptional sound without compromise.

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