MP1740EC-LF-P Datasheet, PDF (1/11 Pages) MPS Industries, Inc. – 3W HIGH EFFICIENCY MONO CLASS-D AUDIO AMPLIFIER

The Future of Analog IC Technology
DESCRIPTION
The MP1740 is a high efficiency Class-D H-
bridge audio amplifier. It utilizes a full bridge
output structure capable of delivering 3W into
4Ω speaker. The device exhibits the high fidelity
of a class AB amplifier with an efficiency of 91%.
It also dramatically reduces solution size by
integrating the following:
z 300mΩ (high side or low side) power MOSFETs
(VCC=3.6V)
z Startup / Shutdown pop elimination
z Short circuit protection
z 9 Balls Wafer chip scale package (WLCSP) and
requires a few external components.
This amplifier also improves GSM power supply
rejection, and operates on a single cellular Li-
ion battery.
The gain of this amplifier can be controlled
easily by a few modification of external
configuration while minimizing noise to 37
μVRMS.
TYPICAL APPLICATION
To Battery
Cs
R_I
IN+
IN-
R_I
EN
AVCC
PVCC
INP
VOP
MP1740
INN
VON
EN
AGND PGND
MP1740
3W HIGH EFFICIENCY
MONO CLASS-D AUDIO AMPLIFIER
FEATURES
• 3W Into 4Ω with 5 V Supply @ 10% THD+N
• Efficiency up to 90% at 1.7W Pout, 8 ohm
load
• 2.5V to 5.5V Supply Voltage Operation
• THD+N = 0.1% @ 1.8W, 5V, 4Ω
• 2mA Quiescent current and 0.5μA
shutdown current
• Full Bridge Output Drive
• Internal 250kHZ Switching frequency
• Fully Differential input
• Improved CMRR Eliminates Two Input
Coupling Capacitors
• 1ms start-up time Eliminates pop
• Integrated Short Circuit Protection
• Integrated Thermal Shutdown
• 9 Balls Wafer chip scale package (WLCSP)
APPLICATIONS
• Wireless or Cellular Handsets
• PDAs
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.
OUT+
OUT-
TND+N vs. P_OUT
fs=1kHz, V_CC=5V, Gain=2V/V
No Weighting
20
10
5
2
1
0.5
0.2
0.1
0.05
0.02
0.01
60m 100m 200m 300m 500m 1
P_OUT (W)
2 34
MP1740 Rev. 1.0
www.MonolithicPower.com
1
1/5/2012
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