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 180mΩ power MOSFETs in a space saving

TSSOP20 package. The MP7782 utilizes a full

bridge output structure capable of delivering

50W into 6Ω 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

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

• 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 180mΩ 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

+

EN

-

+

OFF ON

MP7782-TAC01

100

10

1

0.1

0.01

0.1

1

10

100

OUTPUT POWER (W)

MP7782-EC01