EV8124-D-00A –500mA, LNB POWER SUPPLY AND CONTROL REGULATOR

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.

EV8124-D-00A Rev.1.0

www.MonolithicPower.com

9

11/5/2014

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2014 MPS. All Rights Reserved.

QUICK START GUIDE

The output voltage of this board is set to 19V. The board layout accommodates most commonly

used components.

1. Preset Power Supply to 8V

2. Turn Power Supply off.

3. Connect Power Supply terminals to:

a. Positive (+): VIN

b. Negative (–): GND

4. Connect Load to:

a. Positive (+): VOUT

b. Negative (–): GND

5. Turn Power Supply on after making connections.

6. The MP8124 is enabled on the evaluation board once VIN power is turned on.

7. To use the Enable function, apply a logic high input to the EN pin. Set EN higher than 2V to turn

on the regulator or lower than 0.8V to turn it off.

8. To generate tone signal on output, apply a logic signal with 22KHz frequency to the EXTM pin.

The signal high level should be higher than 2V and the low level should be lower than 0.8V.

9. To adjust the output voltage, apply a logic input on 13V/18V pin or LINEDROP pin. The output

voltage under different conditions is shown in below table. “High” represents a voltage higher

than 2V, “Low” represents a voltage lower than 0.8V.

13/18V

LINEDROP

VOUT

High

High

19V

High

Low

18V

Low

High

14V

Low

Low

13V

10. The soft start time is adjusted by C6. For further information, please refer to MP8124 datasheet.