MP7722
2 x 20W Class D Stereo
Single Ended Audio Amplifer
The Future of Analog IC Technology
DESCRIPTION
The MP7722 is a stereo 2 x 20W Class D Audio
Amplifier. It is one of MPS鈥?second generation
fully integrated audio amplifiers which
dramatically reduces solution size by integrating
the following:
180m鈩?power MOSFETs
Startup / Shutdown pop elimination
Short circuit protection
Mute / Standby
The MP7722 utilizes a single ended output
structure capable of delivering 2 x 20W into 4鈩?/div>
speakers. MPS Class D Audio Amplifiers exhibit
the high fidelity of a Class A/B amplifier at
efficiencies greater than 90%. The circuit is
based on the MPS鈥?proprietary variable
frequency topology that delivers low distortion,
fast response time and operates on a single
power supply.
FEATURES
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2 x 20W Output at V
DD
= 24V into a 4鈩?load
THD+N = 0.06% at 1W, 8鈩?/div>
93% Efficiency at 20W
Low Noise (190碌V Typical)
Switching Frequency Up to 1MHz
9.5V to 24V Operation from a Single Supply
Integrated Startup and Shutdown Pop
Elimination Circuit
Thermal and Short Circuit Protection
Integrated 180m鈩?Switches
Mute/Standby Modes (Sleep)
Thermally Enhanced 20-Pin TSSOP
Package with Exposed Pad
Surround Sound DVD Systems
Televisions
Flat Panel Monitors
Multimedia Computers
Home Stereo Systems
APPLICATIONS
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鈥淢PS鈥?and 鈥淭he Future of Analog IC Technology鈥?are Registered Trademarks of
Monolithic Power Systems, Inc.
AAM (Analog Adaptive Modulation) is a Trademark of Monolithic Power
Systems, Inc.
TYPICAL APPLICATION
V
DD
THD+N vs Output Power
2
24V, f = 1KHz
REF1
17
10
BS1
CH1
INPUT
3
IN1
THD+N (%)
SW1
19
CH1
OUTPUT
MP7722
8
REF2
BS2
12
1
CH2
INPUT
EN
7
6
10
4
9
IN2
EN1
EN2
AGND1
AGND2
VDD1
SW2
14
18
20
13
15
0.1
V
DD
PGND1
VDD2
PGND2
CH2
OUTPUT
0.01
0.1
1
10
OUTPUT POWER (W)
MP7722 Rev. 1.3
9/25/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
漏 2006 MPS. All Rights Reserved.
1
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