MP1720
The Future of Analog IC Technology
2.7W Mono Class D
Low-EMI High-Efficiency Audio Amplifier
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
Cellular Phones
PDAs
MP3 Players
Portable Audio
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:
250mΩ power MOSFETs (V
IN
=3.3V)
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.
APPLICATIONS
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
Power Supply
IN+
IN-
Enable
CIN
CIN
Cs
Cs
AMPLITUDE (dBuV/m)
50
40
30
20
10
0
-10
30
100
300
VIN
INP
INN
DGND
SHDN
MP1720
PVIN
OUTN
OUTP
PGND
CLK
OUT -
OUT+
FCC EMI LIMIT
FREQUENCY (MHz)
MP1720 Rev. 1.01
8/9/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
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