EV0045 (MP7731) COMPACT 25W CLASS D STEREO BRIDGED AUDIO AMPLIFIER
PRELIMINARY INFORMATION
Table 1: EV0045 Stereo Full Bridge Bill of Materials (continued)
Ref
Des
Manufacturer
Part Number
Distributor
Part Number
Item Qty
Value
Description
Package
Manufacturer
174k
Ohm
21
2
R4
Film Resistor, 1%
SM0603
Panasonic
ERJ-3EKF1743V P174KHCT-ND
R14
TP1-
TP10
Test Point Square
Header
22
10
Sullins
PTC36SAAN
S1012-36-ND
Distributor: Digikey
EVALUATION BOARD OPERATION
OUT2+ OUT2-
OUT1+ OUT1- VCC
GND
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)
IN1 GND IN2
GND
EN
Figure 2: Board Connections
06/04, Rev. 1.3
www.MonolithicPower.com
5
MPS [ MONOLITHIC POWER SYSTEMS ]
