NAU8224YG Nuvoton

NAU8224 3.1W Stereo Filter-Free Class-D Audio Amplifier with 2 wire interface gain control 1 Description The NAU8224 is a stereo high efficiency filter-free Class-D audio amplifier, which is capable of driving a 4 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. Key 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 (4 @ 5V, 10% THD+N) 2ch x 1.26W (4 @ 3.7V, 1% THD+N) 2ch x 1.76W (8 @ 5V, 10% THD+N) 2ch x 0.76W (8 @ 3.7V, 1% THD+N)
Low Output Noise: 20 V @0dB gain RMS Applications
87dB PSRR @217Hz
Notebooks / Tablet PCs
Low Current Shutdown Mode
Personal Media Players / Portable TVs
Click-and Pop Suppression
MP3 Players
Portable Game Players
Digital Camcorders Figure 1: NAU8224Block Diagram NAU8224 Datasheet Rev 1.0 Page 1 of 27 Aug, 2012 2 Pinout- QFN 20 (TOP VIEW) Part Number Dimension Package Package Material NAU8224YG 4mm x 4mm QFN-20 Pb-Free NAU8224Datasheet Rev 1.0 Page 2 of 27 Aug, 2012