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PDF EV0045 Data sheet ( Hoja de datos )
| Número de pieza | EV0045 | |
| Descripción | Compact 25W Class D Stereo Bridged Audio Amplifier | |
| Fabricantes | MPS | |
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EV0045 (MP7731)
Compact 25W Class D
Stereo Bridged Audio Amplifier
Monolithic Power Systems
EVALUATION BOARD – PRELIMINARY INFORMATION
GENERAL DESCRIPTION
The EV0045 is a stereo evaluation board
featuring MPS’ MP7731 Class D Full Bridge
Audio Amplifier. The EV0045 can deliver 25W
into a 4Ω load with a 14.5V input supply.
The MP7731 is a mono 30W Class D Audio
Amplifier. It is one of MPS’ 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
• Mute / Standby Mode
The MP7731 utilizes a full bridge output
structure capable of delivering 30W 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
• 25W into 4Ω with 14.5V Input
• 90% Efficiency at 5W
• 9.5V to 14.5V Supply Voltage Operation
• Full Bridge Output Drive
• Integrated 180mΩ Switches
• Turn On / Turn Off Click and Pop
Suppression
• Integrated Short Circuit Protection
• Integrated Thermal shutdown
• Mute / Standby Mode
APPLICATIONS
• Notebook and Multimedia Computers
• Television and Home Theatre Systems
• DVD and VCR Players
, “MPS”, “Monolithic Power Systems”, and “The Future of Analog IC
Technology” are Registered Trademarks of Monolithic Power Systems, Inc.
EVALUATION BOARD
Dimensions (1.9”X x 1.2”Y)
Board Number
EV0045
MPS IC Number
MP7731DF
ABSOLUTE MAXIMUM RATINGS
Supply Voltage VIN....................................... 26V
BS Voltage.......................VSW-0.3V to VSW+6.5V
Enable Voltage VEN........................... -0.3V to 6V
VSW, VPIN, VNIN .............................. -1V to VDD+1V
AGND to PGND ............................. -0.3V to 0.3V
Recommended Operating Conditions
Input Voltage VDD.......................... 9.5V to 14.5V
Signal Input Voltage ..............................±1V rms
Signal Input Frequency............... 20Hz to 20kHz
Signal Source Impedance ..........less than 600Ω
External Enable Input ........................... 0V to 5V
Speaker Resistance ............................ 4Ω to 8Ω
06/04, Rev. 1.3
www.MonolithicPower.com
1
1 page  
EV0045 (MP7731) COMPACT 25W CLASS D STEREO BRIDGED AUDIO AMPLIFIER
PRELIMINARY INFORMATION
Table 1: EV0045 Stereo Full Bridge Bill of Materials (continued)
Item Qty
21 2
Ref
Des
R4
R14
22
10
TP1-
TP10
Distributor: Digikey
Value
174k
Ohm
Description
Film Resistor, 1%
Test Point Square
Header
Package
SM0603
Manufacturer
Panasonic
Manufacturer
Part Number
ERJ-3EKF1743V
Distributor
Part Number
P174KHCT-ND
Sullins
PTC36SAAN
S1012-36-ND
EVALUATION BOARD OPERATION
OUT1+ OUT1- VCC GND OUT2+ OUT2-
GND
IN1 GND IN2
Figure 2: Board Connections
EN
Power Requirements
1. Power supply: 12V
2. 0 -1VRMS (max) audio signal source.
3. Speaker: 4Ω or 8Ω:
Setup Condition for 12V Operation
1. Connect speaker outputs to OUT1+, OUT-,
OUT2+, OUT2- respectively.
2. Connect the audio inputs to IN1, GND, IN2
respectively.
3. Adjust the power supply to 12V, (do not turn
on)
4. Connect the power supply to the VCC, GND
terminals
5. Apply power to the board
6. Audio should be heard from the speaker(s)
06/04, Rev. 1.3
www.MonolithicPower.com
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet EV0045.PDF ] | |
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