EV0066
Monolithic Power Systems
General Description
The EV0066 is a 20W stereo evaluation board
featuring MPS’ MP7720 Class D Single Ended
Audio Amplifier. The EV0066 can deliver 20W
into a 4Ω load with a 24V input supply.
The MP7720 is a mono 20W Class D Audio
Amplifier. It is one of MPS’s second generation
of fully integrated audio amplifiers which
dramatically reduces solution size by
integrating the following:
180mΩ power MOSFETs
Start up / shut down pop elimination
Short circuit protection circuits
MP7720: Mini 20W Stereo Class D
Single Ended Audio Amplifier
EVALUATION BOARD
Absolute Maximum Ratings
Supply Voltage V
DD
Signal Input Voltage
Enable Voltage
26V
±2V p-p
–0.3 to 6V
Recommended Operating Conditions
Input Voltage V
DD
Signal Input Voltage
Signal Input Frequency
Signal Source Impedance
External Enable Input
Speaker Resistance
7.5V to 24V
1V rms
20Hz to 20KHz
<600Ω
0V to 5V
4Ω to 8Ω
Performance
Maximum Output Power (10% THD, 4Ω) 20W
Maximum Output Power (10% THD, 8Ω) 10W
THD (1kHz, 1W)
0.05%
Power Efficiency (P
OUT
=20W, 4Ω)
90%
The MP7720 utilizes a single ended output
structure capable of delivering 20W into 4Ω
speakers. As in all other MPS Class D Audio
Amplifiers, this device exhibits the high fidelity
of a Class A/B amplifier at efficiencies greater
than 90%.
Features
20W Output at 24V Input Into a 4Ω Load
0.05% THD+N @ 2W, 1KHz Into 4Ω Load
0.05% THD+N @ 2W, 1KHz Into 8Ω Load
90% Efficiency at 20W
Integrated Start-Up and Shut-Down
Pop Elimination Circuit
Thermal Protection
Integrated 180mΩ Power Switches
Mute / Standby Mode (Sleep)
Ordering Information
Board Number
EV0066
MPS IC Number
MP7720DS
EV0066 Evaluation Board
Applications
Televisions
Home Stereo Systems
Monitors
(Actual Size = 1.0”X x 1.4”Y)
EV0066 Rev 1.1 05/12/04
www.monolithicpower.com
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MPS [ MONOLITHIC POWER SYSTEMS ]
