EV3393-F-00A – STEP-UP 8-STRING WHITE LED DRIVER EVALUATION BOARD

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.

EV3393-F-00A Rev. 1.01

www.MonolithicPower.com

7

5/7/2013

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

© 2013 MPS. All Rights Reserved.

QUICK START GUIDE

1. Connect the positive terminals of 8-string LED load and LED+ port together. Then connect the

negative terminals of 1-8 LED strings to LED1-8 port respectively.

2. Preset the power supply output to between 12 and 30V, and then turn it off.

3. Connect the positive and negative terminals of the power supply output to the VIN and GND

ports, respectively.

4. Connect +5V to EN and DIM ports. If PWM dimming is required, put a 100-200Hz PWM signal

on DIM port.

5. Output over voltage protection (OVP) function is implemented by the addition of a resistor

is triggered. It is preset to 45V on this board.

6. Use R15, R20, R24, R29, R32, R35, R38 and R40 to set output current for each string. On the

demo board, they are 1Ω. The output current is (0.202/1)≈0.2A/string.