EV0066

MP7720: Mini 20W Stereo Class D

Single Ended Audio Amplifier

EVALUATION BOARD

EV0066 Rev 1.1 05/12/04

www.monolithicpower.com

5

Monolithic Power Systems

Figure 5: EV0066 Connection Diagram

CN1

CN2

CN3

OUT1 GND GND OUT2

Power

Supply

+

-

IN1

IN2

Enable

Evaluation Board Operation

Power Requirements

1. Power supply: 7.5V to 24V, 6A maximum

2. 0

3. Speaker: 4

Setup Condition for 24V Operation

1.

Connect + and - speakers terminals to OUT and GND pins of CN2 and CN3 respectively.

2.

Connect the + and 1 power supply terminals to Pin 1 and 2 of CN1 respectively.

3.

Adjust the power supply to 7.5

≤ VCC ≤ 24V, (do not turn on).

4.

Connect the audio input signal source to the amplifier inputs (IN1, IN2).

5.

Turn on the power supply to apply power to the board.

6.

To enable the board apply a voltage, 2V

connect the EN pin to ground.