EV0045 (MP7731) COMPACT 25W CLASS D STEREO BRIDGED AUDIO AMPLIFIER

PRELIMINARY INFORMATION

06/04, Rev. 1.3

www.MonolithicPower.com

5

Table 1: EV0045 Stereo Full Bridge Bill of Materials (continued)

Item

Qty

Ref

Des

Value

Description

Package

Manufacturer

Manufacturer

Part Number

Distributor

Part Number

21

2

R4

174k

Ohm

Film Resistor, 1%

SM0603

Panasonic

ERJ-3EKF1743V

P174KHCT-ND

R14

22

10

TP1-

TP10

Test Point Square

Header

Sullins

PTC36SAAN

S1012-36-ND

Distributor: Digikey

EVALUATION BOARD OPERATION

Figure 2: Board Connections

Power Requirements

1. Power supply: 12V

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

IN1

GND

IN2

OUT1+ OUT1-

OUT2+ OUT2-

VCC

GND

EN

GND