MP7705

12V, 2x5W/2x2.5W Class–D Stereo

Single Ended Audio Amplifier

MP7705 Rev. 1.1

www.MonolithicPower.com

1

9/18/2009

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2009 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP7705 is a stereo 2x5W/2x2.5W Class–D

Audio Amplifier. It is one of MPS’ second

generation fully integrated audio amplifiers

which dramatically reduces solution size by

integrating the following:

250mΩ power MOSFETs

Startup / Shutdown pop elimination

Short circuit protection

Mute / Standby

The MP7705 utilizes a single ended output

structure capable of delivering 2x5W into 4Ω or

2x2.5W into 8Ω 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’ proprietary variable

frequency topology that delivers low distortion,

fast response time and operates on a single

power supply.

FEATURES

• THD+N = 0.06% at 1W, 8Ω

• 95% Efficiency at 2.5W

• Low Noise (190μV Typical)

• Switching Frequency Up to 1MHz

• 9.5V to 12V Single-Supply Operation

• Integrated Startup and Shutdown Pop

Elimination Circuit

• Thermal and Short Circuit Protection

• Integrated 250mΩ Switches

• Mute/Standby Modes (Sleep)

• Thermally

Enhanced

20-Pin

TSSOP

Package with Exposed Pad

APPLICATIONS

• Surround Sound DVD Systems

• Televisions

• Flat Panel Monitors

• Multimedia Computers

• Home Stereo Systems

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

AAM (Analog Adaptive Modulation) is a Trademark of Monolithic Power

Systems, Inc.

TYPICAL APPLICATION

MP7705

BS1

SW1

BS2

SW2

REF1

2

3

8

CH1

INPUT

7

6

10

4

9

CH1

OUTPUT

CH2

OUTPUT

14

18

20

13

15

12

19

17

IN1

REF2

IN2

EN2

EN1

AGND2

AGND1

PGND2

VDD2

CH2

INPUT

EN

PGND1

VDD1