EV24830-S-00A – EVB DESCRIPTION

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.

EV24830-S-00A Rev.1.1

www.MonolithicPower.com

7

5/4/2014

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QUICK START GUIDE

1. Connect the LED string between “LED+” (anode of LED string) and “LED-“(cathode of LED string).

The LED string voltage should be Less than 28V (7 LED string voltage is about 25V), since the

output voltage protection is about 28V.

the “VIN” and “INGND” terminals as shown in the EVB board.

3. Set a second power supply 5V as the EN input supply to the EVB.

4. Turn-off all power supplies.

5. Turn-on the input voltage power supply.

6. Turn on the 5V EN power supply. All the LED strings should be lighted.

7. The switching frequency was set by R6, which is about 200kHz.

8.

To demo the dimming function on DIM connector: using a function generator set the PWM signal

amplitude to 5V and the frequency within 100Hz to 20kHz range for PWM dimming. For analog

dimming, adjust the power supply from 0.7V to 2V.