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Product attributes Property Value
Manufacturer Nuvoton Technology Corporation
Product Series
Packaging Tray |
Part Status Active
Type Class D
Output Type 1-Channel (Mono)
Max Output Power x Channels @ Load 1.73W x 1 @ 8Ohm; 3.2W x 1 @ 4Ohm
Voltage - Supply 1.71V ~ 1.89V
Features -
Mounting Type Surface Mount
Operating Temperature -40°C ~ 85°C
Grade -
Qualification -
Supplier Device Package 20-QFN (4x4)
Package / Case 20-WFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The NAU8318YG is a high-efficiency mono Class D amplifier designed for portable and battery-powered applications. Operating from 1.71V to 1.89V, it delivers up to 3.2W into 4Ω loads, making it ideal for compact speakers, toys, and radios. The 20-QFN package with exposed pad ensures excellent thermal performance, while the wide -40°C to 85°C temperature range guarantees reliability. Its low voltage operation directly supports single-cell lithium-ion batteries without boost converters.

  • High Output Power: Delivers 3.2W into 4Ω, suitable for loud audio in small devices.
  • Ultra-Low Voltage Operation: Works from 1.71V, enabling direct battery connection.
  • Class D Efficiency: Minimizes heat and extends battery life in portable gear.
  • Compact Package: 20-QFN (4x4mm) saves space for miniaturized designs.
  • Wide Temperature Range: Reliable from -40°C to 85°C for diverse applications.

Portable Bluetooth Speakers

The NAU8318YG's 3.2W output into 4Ω and low 1.71V supply make it perfect for compact Bluetooth speakers, delivering loud audio with Class D efficiency.

Battery-Powered Toys

Its low voltage operation and small QFN package suit battery-powered toys, providing clear mono sound while maximizing runtime.

USB-Powered Desktop Speakers

With 1.73W into 8Ω, this amplifier can drive small desktop speakers from a USB bus, offering efficient amplification for computer audio.

Portable Radios

The NAU8318YG's mono output and wide temperature range make it reliable for portable AM/FM radios, ensuring consistent performance outdoors.

Intercom Systems

Its high efficiency and compact size enable integration into intercom units, delivering clear voice amplification with minimal heat generation.

Q: What is the supply voltage range for the NAU8318YG?
A: It operates from 1.71V to 1.89V.
Q: What output power can the NAU8318YG deliver?
A: It provides 1.73W into 8Ω or 3.2W into 4Ω in mono mode.
Q: Is the NAU8318YG a Class D amplifier?
A: Yes, it is a mono Class D amplifier, offering high efficiency.
Q: What package does the NAU8318YG come in?
A: It is available in a 20-QFN (4x4mm) package with an exposed pad.
Q: What is the operating temperature range?
A: It operates from -40°C to 85°C.
Base Product Number : NAU8318
20-QFN Audio Amplifier Class D High Efficiency Low Voltage Mono NAU8318 Portable Speaker
Q: What is the supply voltage range for the NAU8318YG?
A: It operates from 1.71V to 1.89V.
Q: What output power can the NAU8318YG deliver?
A: It provides 1.73W into 8Ω or 3.2W into 4Ω in mono mode.
Q: Is the NAU8318YG a Class D amplifier?
A: Yes, it is a mono Class D amplifier, offering high efficiency.
Q: What package does the NAU8318YG come in?
A: It is available in a 20-QFN (4x4mm) package with an exposed pad.
Q: What is the operating temperature range?
A: It operates from -40°C to 85°C.