MP7731 Просмотр технического описания (PDF) - Monolithic Power Systems
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MP7731 Datasheet PDF : 9 Pages
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The Future of Analog IC Technology
DESCRIPTION
The MP7731 is a mono, 5W - 30W Class D Audio
Amplifier. It is one of MPS’ second generation of
fully integrated audio amplifiers which dramatically
reduces solution size by integrating the following:
Start Up / Shut Down Pop Elimination
Short Circuit Protection Circuits
180mΩ Power MOSFETs
Mute / Standby Mode
The MP7731 utilizes a full bridge output structure
capable of delivering 5W - 30W into 4Ω
speakers. As in all other MPS Class D Audio
Amplifiers, this device exhibits the high fidelity
of a Class AB amplifier with an efficiency of
90%. The circuit is based on the MPS’ proprietary
variable frequency topology Analog Adaptive
Modulation (AAM™, Patent No. 6,420,930; other
patents pending) that delivers excellent PSRR,
fast response time and operates on a single
power supply.
EVALUATION BOARD REFERENCE
Board Number
EV0045
Dimensions
4.8cm x 3.0cm x 1.5cm
MP7731
5W - 30W Class D Mono
Bridged Audio Amplifier
FEATURES
30W into 4Ω with VDD = 16.5V
90% Efficiency at 5W
Amplifies Full Audio Range with Low THD+N
Typical = 0.1%
9.5V to 18V Supply Voltage Operation
Full Bridge Output Drive
4 Integrated 180mΩ Switches
Turn On / Turn Off Click and Pop Suppression
Integrated Short Circuit Protection
Integrated Thermal shutdown
Mute / Standby Mode
APPLICATIONS
• Flat Panel LCD and PDP Displays
• Notebook and Multimedia Computers
• Televisions
• Home Stereos
• DVD and VCD Players
• Game Devices and Systems
• Monitors
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks
of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
AUDIO IN+
AUDIO IN-
MP7731
1
NC
20
PGND1
2
PIN1
19
SW1
3
NIN1
18
VDD1
4
AGND1
17
BS1
5
NC
16
NC
6
EN1
15
PGND2
7
NIN2
14
SW2
8
PIN2
13
VDD2
9
AGND2
12
BS2
10
EN
EN2
11
NC
VCC
+
VCC
VCC
VCC
VCC
THD+N vs Output Power
50
20 f=1kHz
10
5
2
-
1
+
0.5
0.2
0.1
0.05
0.02
0.01
100M
1
10 50
OUTPUT POWER (W)
MP7731 Rev. 1.8
www.MonolithicPower.com
1
9/25/2006
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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