As automotive electronics enters the era of the "smart cockpit," vehicle intelligence has become a key aspect for the industry. This trend is driving increased functional requirements for audio solution providers in automotive applications.
Nuvoton Technology meets automotive industry standards and offers AEC-Q100 certified products for automotive applications. To simplify system design, our solutions support I2S digital audio signal input from the vehicle's main controller, reducing the need for external components and minimizing the printed circuit board size. Furthermore, our digital amplifiers help prevent circuit interference and effectively resolve EMI issues.
The NAU83U25YG Class D stereo audio amplifier boasts advanced features such as 80 dB PSRR, 90% efficiency, ultra-low quiescent current (i.e., 2.1 mA at 3.7 V for 2 channels), and superior EMI performance. It delivers lower distortion, reduced background noise, and a wider dynamic range. Furthermore, this new amplifier supports comprehensive device protection.
Key Features of the NAU83U25YG:
1. Gain adjustment via I²C interface, from 22 dB to -62 dB
2. Powerful Class D stereo amplifier, 2 channels x 3.0 W (4 Ω at 5 V, 10% THD+N)
3. Low output noise: 18 μVrms at 0 dB gain
4. Comprehensive device protection:
· Overcurrent Protection (OCP)
· Undervoltage Lockout (UVLO)
· Overtemperature Protection (OTP)
· Clock Termination Protection (CTP)
5. Click and pop suppression
6. Package: QFN-20
7. Operating temperature range: -40 ℃ ~ +105 ℃
8. Automotive grade: AEC-Q100 certified and TS16949 compliant
The NAU83U25YG amplifier stands out for eliminating the need for an external output filter, thanks to its wide-spectrum oscillator technology and slew rate control, which effectively reduces electromagnetic interference (EMI). Furthermore, it offers enhanced immunity and a power supply rejection ratio (PSRR) of >80 dB at 217 Hz. This makes the NAU83U25YG ideal for Class D audio amplifiers in wireless frequency band and AM (amplitude modulation) applications.
The Class D topology generates a binary square wave. Class D amplifiers amplify the signal by switching power devices. Compared to Class AB devices, Class D amplifiers offer two-thirds greater energy efficiency.
The NAU83U25YG Class D audio amplifier stands out for its ability to drive a 4 Ω load with an impressive output power of up to 3 W and a fast startup time of only 14 ms.
Target applications of the NAU83U25YG
The new Class D audio amplifier is designed for automotive electronics applications such as dashboards, eCall, ADAS (Advanced Driver Assistance Systems) and T-Box.
