MP1720

2.7W Mono Class D

Low-EMI High-Efficiency Audio Amplifier

MP1720 Rev. 1.01

www.MonolithicPower.com

1

8/9/2012

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2012 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP1720 is a high efficiency Class-D audio

amplifier. It utilizes a full bridge output structure

capable of delivering 2.7W into 4Ω speaker.

This device exhibits the high fidelity of a class

AB amplifier with an efficiency of 90% which

dramatically reduces solution size by integrating

the following:





Startup / Shutdown pop elimination



Short circuit /Thermal overload Protection

The MP1720 features a pin-selectable 1MHz or

1.3MHz

frequency

control

or

can

be

synchronized to an external clock source. The

flexible switching frequency and internal EMI-

reduction scheme eliminates the need for an

output LC filter and passes emission standards

without filter & with considerable cable.

The MP1720 has five fixed gain options.

MP1720-3: 3dB; MP1720-6: 6dB; MP1720-9:

9dB; MP1720-12: 12dB; MP1720-216: 21.6dB.

The MP1720 is available in 10-pin MSOP-EP

and 10-pin QFN packages.

FEATURES

 Passes FCC-Radiated Emissions Standards

with 24inch of Cable without output filter

 2.7W Into 4Ω with 5V VIN @ 10% THD+N

 Up to 90% Efficiency

 Flexible Switching Frequency setting

 Low Noise (53μV Typical) with 3.3V VIN

 15ms Start-up time Eliminates pop

 Low Quiescent Current (4mA @3.3V)

 Low Shutdown Current (0.1μA)

 Full Bridge Output Drive

 Fully Differential Input

 Short circuit Protection

 Thermal Shutdown

APPLICATIONS

 Cellular Phones

 PDAs

 MP3 Players

 Portable Audio

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Products, Quality Assurance page.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP1720

Power Supply

INP

INN

DGND

SHDN

PVIN

PGND

OUTP

OUTN

CLK

OUT

-

OUT

+

Cs

IN+

IN-

Cs

CIN

CIN

Enable

VIN

-10

0

10

20

30

40

50

100

30

300

FCC EMI LIMIT

FREQUENCY (MHz)