MP7722DF MPS [Monolithic Power Systems], MP7722DF Datasheet

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MP7722DF

Manufacturer Part Number
MP7722DF
Description
2 x 20W Class D Stereo Single Ended Audio Amplifer
Manufacturer
MPS [Monolithic Power Systems]
Datasheet

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The Future of Analog IC Technology
DESCRIPTION
The MP7722 is a stereo 2 x 20W Class D Audio
Amplifier. It is one of MPS’ second generation
fully
dramatically reduces solution size by integrating
the following:
180mΩ power MOSFETs
Startup / Shutdown pop elimination
Short circuit protection
Mute / Standby
The MP7722 utilizes a single ended output
structure capable of delivering 2 x 20W into 4Ω
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
frequency topology that delivers low distortion,
fast response time and operates on a single
power supply.
TYPICAL APPLICATION
MP7722 Rev. 1.3
9/25/2006
INPUT
INPUT
CH1
CH2
integrated
on
the
EN
V
DD
MPS’
10
2
3
8
7
6
4
9
audio
REF1
IN1
REF2
IN2
EN1
EN2
AGND1
AGND2
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
MP7722
proprietary
PGND1
PGND2
amplifiers
VDD1
VDD2
SW1
SW2
BS1
BS2
17
19
12
14
18
20
13
15
© 2006 MPS. All Rights Reserved.
variable
V
www.MonolithicPower.com
DD
which
FEATURES
APPLICATIONS
“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.
2 x 20W Output at V
THD+N = 0.06% at 1W, 8Ω
93% Efficiency at 20W
Low Noise (190µV Typical)
Switching Frequency Up to 1MHz
9.5V to 24V Operation from a Single Supply
Integrated Startup and Shutdown Pop
Elimination Circuit
Thermal and Short Circuit Protection
Integrated 180mΩ Switches
Mute/Standby Modes (Sleep)
Thermally
Package with Exposed Pad
Surround Sound DVD Systems
Televisions
Flat Panel Monitors
Multimedia Computers
Home Stereo Systems
Single Ended Audio Amplifer
CH1
OUTPUT
CH2
OUTPUT
2 x 20W Class D Stereo
Enhanced
0.01
0.1
10
1
THD+N vs Output Power
24V, f = 1KHz
0.1
DD
OUTPUT POWER (W)
= 24V into a 4Ω load
20-Pin
MP7722
1
TSSOP
10
1

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MP7722DF Summary of contents

Page 1

The Future of Analog IC Technology DESCRIPTION The MP7722 is a stereo 2 x 20W Class D Audio Amplifier one of MPS’ second generation fully integrated audio amplifiers dramatically reduces solution size by integrating the following: 180mΩ power ...

Page 2

... AGND2 9 EN2 10 EXPOSED PAD (CONNECT TO PGND) Part Number* Package MP7722DF TSSOP20F * For Tape & Reel, add suffix –Z (eg. MP7722DF–Z) For Lead Free, add suffix –LF (eg. MP7722DF–LF–Z) ELECTRICAL CHARACTERISTICS V = 24V 5V +25°C, unless otherwise noted Parameters Supply Current ...

Page 3

MP7722 – 20W CLASS D STEREO SINGLE ENDED AUDIO AMPLIFIER OPERATING SPECIFICATIONS Circuit of Figure 24V Parameters Power Output THD+ Noise Efficiency Maximum Power Bandwidth Dynamic Range Noise Floor Power Supply Rejection PIN ...

Page 4

MP7722 – 20W CLASS D STEREO SINGLE ENDED AUDIO AMPLIFIER PIN FUNCTIONS (continued) Pin # Name Description High-Side MOSFET Bootstrap Input for Amplifier 1. A capacitor from BS1 to SW1 supplies 17 BS1 the gate drive current to ...

Page 5

MP7722 – 20W CLASS D STEREO SINGLE ENDED AUDIO AMPLIFIER TYPICAL PERFORMANCE CHARACTERISTICS 0 -30 -60 -90 -120 -150 20 100 1K FREQUENCY (Hz) +0 -20 -40 -60 -80 -100 20 100 1K FREQUENCY (Hz) Efficiency vs P ...

Page 6

MP7722 – 20W CLASS D STEREO SINGLE ENDED AUDIO AMPLIFIER OPERATION The MP7722 uses Monolithic Power Systems’ patented Analog Adaptive Modulation convert the audio input signal into pulses of power that, when filtered through an external inductor-capacitor filter, ...

Page 7

MP7722 – 20W CLASS D STEREO SINGLE ENDED AUDIO AMPLIFIER APPLICATION INFORMATION COMPONENT SELECTION The MP7722 uses a minimum number of external components to complete a stereo Class D audio amplifier. The circuit of Figure 1 is optimized ...

Page 8

MP7722 – 20W CLASS D STEREO SINGLE ENDED AUDIO AMPLIFIER The quality factor (Q) of the LC filter is important. If this is too low output noise will increase, and if this is too high then peaking may ...

Page 9

MP7722 – 20W CLASS D STEREO SINGLE ENDED AUDIO AMPLIFIER PCB Layout The circuit layout is critical for optimum performance and low output distortion and noise. Place the following components as close to the MP7722 as possible: Power ...

Page 10

MP7722 – 20W CLASS D STEREO SINGLE ENDED AUDIO AMPLIFIER TYPICAL APPLICATION CIRCUIT RH1 RL1 C INT1 C R IN1 IN1 CH1 INPUT RH2 RL2 C ...

Page 11

MP7722 – 20W CLASS D STEREO SINGLE ENDED AUDIO AMPLIFIER PACKAGE INFORMATION 6.40 6.60 20 PIN TOP VIEW 0.80 1.05 0.19 0.65 BSC 0.30 FRONT VIEW 3.80 4.30 BOTTOM VIEW NOTICE: The information in this ...

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