EV7722DF-00C – 20W STEREO CLASS D SINGLE ENDED AUDIO AMPLIFIER

EVALUATION BOARD

NOTICE:

The information in this document is subject to change without notice. Please contact MPS for current specifications.

Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS

products into any application. MPS will not assume any legal responsibility for any said applications.

EV7722DF-00C Rev. 1.1

www.MonolithicPower.com

8

10/19/2005

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

TM

QUICK START GUIDE

Follow the instructions below for proper setup and operation. The EV board comes from the factory

preconfigured for 24V operation. For 12V operation, R24 must first be removed, see Figure 5.

Figure 5—12V Operation

1. Power Requirements

a. Power supply: 15V to 24V, 3A maximum.

c. Speaker: 4Ω to 8Ω.

2. Setup Condition for 24V Operation

a. Set the Enable switch to the DISABLE position.

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

c. Connect the external speakers to the EVB Outputs.

d. Before connecting power supply, adjust the power supply to 24V DC (do not turn on).

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

3. 12V Operation Modifications

a. Remove R24 from the demo board.

4. Music Turn-On Sequence

a. Set the enable switch to the ENABLE position.

b. Audio should be heard from the speaker(s).

5. Music Turn-Off Sequence

a. Set the enable switch to the DISABLE position.

b. Turn off power supply.