EV7747DQ-00A
2x20W Stereo Single Ended Class D
Audio Amplifier Evaluation Board
EV7747DQ-00A Rev. 1.0 www.MonolithicPower.com 1
1/5/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The EV7747DQ-00A is the evaluation board for
the MP7747, a 20W mono Class D Audio
Amplifier. It is one of MPS’ products of fully
integrated audio amplifiers which dramatically
reduce solution size by integrating the following:
• 250m power MOSFETs
• Startup / Shutdown pop elimination
• Short circuit protection circuits
The MP7747 utilizes a single ended output
structure capable of delivering 20W into 4
speakers. MPS Class D Audio Amplifiers exhibit
the high fidelity of a Class A/B amplifier at high
efficiency. The circuit is based on the MPS’
AAM
TM
proprietary variable frequency topology
that delivers excellent linearity, fast response
time and operates on a single power supply.
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Supply Voltage V
DD
9.5~36 V
FEATURES
• 2 x 20W Output at V
DD
= 24V into a 4 load
• THD+N = 0.02% at 1W, 8, 1kHz
• 91% Efficiency at 20W and V
DD
=24V with
4 load
• Low Noise (103µV Typical)
• 9.5V to 36V Operation from a Single Supply
APPLICATIONS
• Flat Panel TV
• Portable Docking Stations
• Surround Sound DVD Systems
• Televisions
• Multimedia Computers
• Home Stereo Systems
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
AM (Analog Adaptive Modulation) is a Trademark of Monolithic Power
Systems, Inc.
EV7747DQ-00A EVALUATION BOARD
(L x W x H) 3.5” x 2.5” x 1.2”
9.0cm x 6.3cm x 3.0cm
Board Number MPS IC Number
EV7747DQ-00A MP7747DQ
THD+N vs. P
OUT
V
DD
=24V, Freq=1kHz
0.01
20
0.02
0.05
0.1
0.2
0.5
10
5
2
1
THD + N (%)
60m 35100m 1 10
P
OUT
(W)
