MP7782
50W Class D
Mono Bridged Audio Amplifier
MP7782 Rev. 1.2 www.MonolithicPower.com 1
8/3/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
The Future of Analog IC Technology
TM
TM
DESCRIPTION
The MP7782 is a mono, 50W Class D Audio
Amplifier. It is one of MPS’ second generation
fully integrated audio amplifiers which
dramatically reduces solution size by integrating
four 180m power MOSFETs in a space saving
TSSOP20 package. The MP7782 utilizes a full
bridge output structure capable of delivering
50W into 6 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
ADAM
TM
(Analog Digital Adaptive Modulation),
MPS’ proprietary variable frequency modulation
topology (patents pending) that delivers
excellent PSRR, fast response time and
operates on a single power supply.
EVALUATION BOARD REFERENCE
Board Number Dimensions
EV7782DF-00A 4.0”X x 3.5”Y x 1.0”Z
FEATURES
• 50W into 6 with V
DD
= 24V @10% THD+N
• 90% Efficiency at 50W
• Amplifies Full Audio Range with Low THD+N
• THD+N = 0.06% @ 1W
• 9.5V to 24V Supply Voltage Operation
• Full Bridge Output Drive
• 4 Integrated 180m Switches
• Turn-On / Turn-Off Click and Pop Suppression
• Integrated Short Circuit Protection
• Integrated Thermal Shutdown
• Mute / Standby Mode
• Thermally Enhanced 20-Pin TSSOP
Package with Exposed Pad
APPLICATIONS
• MP3 Systems
• Surround Sound Systems
• Multimedia Computers
• Televisions
• Home Stereos
• DVD and VCD Players
• Game Devices and Systems
• Subwoofers
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
ADAM (Analog Digital Adaptive Modulation) is a Trademark of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
MP7782
NC
FB2
FB1
AGND
NC
EN
FB2
FB1
AGND
EN
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
PGND1
SW1
VDD1
BS1
NC
PGND2
SW2
VDD2
BS2
NC
AUDIO IN
GND
+
V
DD
EN
-
+
OFF ON
MP7782-TAC01
100
10
1
0.1
0.01
THD+N (%)
0.1 1 10 100
OUTPUT POWER (W)
MP7782-EC01
