EV8126DF-00A – LNB POWER SUPPLY AND CONTROL VOLTAGE REGULATOR

NOTICE:

The information in this document is subject to change without notice. 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.

EV8126DF-00A Rev. 1.0

www.MonolithicPower.com

5

4/19/2012

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2012 MPS. All Rights Reserved.

QUICK START GUIDE

1. Connect the positive terminal of the load to VOUT pins, and the negative terminal of the load to

GND pins.

2. Preset the power supply output to 8~14V and turn off the power supply.

3. Connect the positive terminal of the power supply output to the VIN pin and the negative

terminal of the power supply output to the GND pin.

4. Turn on the power supply. The board will automatically start up.

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

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

6. To generate tone signal on output, apply a logic input to the EXTM pin. Set EXTM higher than

2V to activate the function or lower than 0.8V to deactivate it.

7. The output voltage of this board is set to 19V. To adjust the output voltage, apply a logic input

on 13V/18V 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.

13V/18V

LINEDROP

VOUT

High

High

19V

High

Low

18V

Low

High

14V

Low

Low

13V

8. The current limit can be adjusted by R1 and the soft start time be adjusted by C7. For further

information, please refer to MP8126 datasheet.