3.4.
AUDIO AMPLIFIER STAGE WITH MP7721General Description
17MB38 uses a 10W Class D Stereo Single Ended Audio Amplifer for audio.
The MP7721
is a stereo 10W Class D Audio Amplif
ier. It is one of MPS’ second generation of fully
integrated audio amplifiers which dramatically reduces solution size by integrating the
following:
x
180m
SRZHU026)(7V
x
Startup / Shutdown pop elimination
x
Short circuit protection
x
Mute / Standby
The MP7721 utilizes a single ended output structure capable of delivering 2 x 10W into
8
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.
3.5.
Features
x
2 x 10W Output at VDD = 24V into a 8
ORDG
x
THD+N = 0.06% at 1W, 8
x
93% Efficiency at 10W
x
Low Noise (190μV Typical)
x
Switching Frequency Up to 1MHz
x
9.5V to 24V Operation from a Single Supply
x
Integrated Startup and Shutdown Pop Elimination Circuit
x
Thermal and Short Circuit Protection
x
Integrated 180m
6ZLWFKHV
x
Mute/Standby Modes (Sleep)
x
Thermally Enhanced 20-Pin TSSOP Package with Exposed Pad
Applications
x
Surround Sound DVD Systems
x
Televisions
x
Flat Panel Monitors
x
Multimedia Computers
x
Home Stereo Systems
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