NAU8318YG

Overview

The NAU8318YG is a mono high-efficiency filter-free Class-D audio amplifier manufactured by Nuvoton Technology Corporation. It operates within a battery supply range of 2.5V to 5.25V and delivers up to 3.2W output power into a 4Ω load at 5V with 10% THD+N. The device features an I2S digital audio interface, low standby current, and fast start-up time. Key electrical parameters include 91% efficiency, 82dB PSRR at 217Hz, and ultra-low quiescent current. It supports sampling rates from 8K to 96KHz and includes protection mechanisms such as OCP, UVLO, OTP, and CTP.

Feature Summary

• Filter-free operation utilizing true Class-D architecture for simplified PCB layout
• Pin-selectable gain settings and channel configurations via analog input pins
• Integrated beep generator with configurable output levels
• Advanced protection including over-current, under-voltage lockout, and thermal shutdown

Applications

• Gaming Controllers
• Wireless (VR) Headsets
• Smart Remote Controllers
• Personal Media Players
• Chromebooks / Notebooks / Tablet PCs

Procurement Notes

Verify the specific package type required, as the NAU8318 is available in both 14-ball WLCSP and 20-pin QFN formats. Confirm that the YG suffix corresponds to the QFN-20 package variant when sourcing. Ensure compatibility with the host controller's digital interface voltage levels, noting the low input threshold design. Check for RoHS and TSCA compliance requirements relevant to your manufacturing region.

Selection Notes

Select the NAU8318YG for portable applications requiring high efficiency and minimal external components. The QFN-20 package offers better thermal dissipation compared to the WLCSP option. Consider the pin-selectable gain modes if hardware flexibility is needed without software control. Verify that the target application supports I2S or PCM digital audio inputs, as this device does not include an integrated DAC for analog inputs.

Part Context

The NAU8318 belongs to Nuvoton's portfolio of efficient audio amplifiers designed for mobile and consumer electronics. It complements other devices like the NAU8315 and NAU8325 by offering a mono configuration optimized for cost-sensitive and space-constrained designs. The component integrates advanced features like automatic level control and click-and-pop suppression to enhance user experience in battery-powered devices.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.