Nuvoton NAU8224 Quick Start Manual

1 GENERAL DESCRIPTION
The NAU8224 is a stereo high efficiency filter-free Class-D audio amplifier, which is capable of driving a 4Ω load with
up to 3.1W output power. This device provides chip enable pin with extremely low standby current and fast start-up
time of 3.4ms. The NAU8224 features a highly flexible 2 wire interface with many useful gain settings. The gain can
be selected from 24dB to -62dB (plus mute) by using 2 wire interface and GS pin.
The NAU8224 is ideal for the portable applications of battery drive, as it has advanced features like 87dB PSRR, 91%
efficiency, ultra-low quiescent current (i.e. 2.1mA at 3.7V for 2 channels) and superior EMI performance. It has the
ability to configure the inputs in either single-ended or differential mode. NAU8224 is available in Miniature QFN-20
package.
FEATURES

Low Quiescent Current:
•
2.1mA at 3.7V for 2 channels
•
3.2mA at 5V for 2 channels

Gain Setting with 2 wire interface and GS pin
•
24dB to -62dB (plus mute)

Powerful Stereo Class-D Amplifier:
• 2ch x 3.1W (4Ω @ 5V, 10% THD+N)
• 2ch x 1.26W (4Ω @ 3.7V, 1% THD+N)
• 2ch x 1.76W (8Ω @ 5V, 10% THD+N)
• 2ch x 0.76W (8Ω @ 3.7V, 1% THD+N)

Low Output Noise: 20 µV

87dB PSRR @217Hz

Low Current Shutdown Mode

Click-and Pop Suppression

Package: QFN-20
Package is Halogen-free, RoHS-compliant and
TSCA-compliant
Feb 1, 2023
3.1W Stereo Filter-Free Class-D Audio Amplifier
0dB gain
RMS @
Page 1 of 34
with 2 wire interface gain control
Applications

Notebooks / Tablet PCs

Personal Media Players / Portable TVs

MP3 Players

Portable Game Players

Digital Camcorders
NAU8224
Rev 1.1