ESMT
AD62550A
Class-D Audio Power Amplifier with USB / I
2
S Interface
Features
Compliant with USB Specification v1.1, and USB
2.0 full speed
Embedded high efficiency, high performance class
D stereo amplifier
Support I
2
S input and I
2
S output interface of
master mode
Sampling frequencies(Fs)：48kHz
+6dB enhancement(Theater function)
Support both bus-powered and self-powered
operation
Supports Win Me//2000/XP and MacOS
True plug-and-play application, no driver is
required for basic USB speaker application
Support volume/mute control with external button
Built-in 5V to 3.3V regulator for internal device
operation
Total efficiency
80% for 8Ω load @ -1dB 1kHz sine wave input
Loudspeaker PSNR & DR (A-weighting)
80dB (PSNR), 78dB (DR) with Bead filter
82dB (PSNR), 78dB (DR) with Chock filter
Anti-pop design
Over-temperature protection
Under-voltage shutdown
Short-circuit detection
12 MHz Crystal Input
32-pin LQFP(Pb free)
Description
AD62550A is a single chip of Class-D audio
amplifier with USB/I
2
S interface. When using the
power supplied from the USB port, AD62550A can
drive a pair of up to 1W speakers due to the built-in,
high efficiency and high performance class D
amplifiers. The device also has an I
2
S input port and
I
2
S output port. The I
2
S input port allows other
external audio sources to use the class D amplifier
to share the speakers. The I
2
S output port allows
other high performance audio device (i.e.
AD8356A/AD8256A) to be controlled by AD62550A.
Functional Block Diagram
Elite Semiconductor Memory Technology Inc.
Publication Date: Apr. 2007
Revision: 1.3
1/14
ESMT [ ELITE SEMICONDUCTOR MEMORY TECHNOLOGY INC. ]
