EV24895-J-00A---STEP-DOWN 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.

EV24895-J-00A Rev.1.0

www.MonolithicPower.com

4

8/7/2014

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

© 2014 MPS. All Rights Reserved.

QUICK START GUIDE

1. Connect the positive and negative terminals of the load to the LED+ and LED- pins on the EV

board, respectively.

2. Connect the positive and negative terminals of the 24V AC power supply to the AC1 and AC2. If

apply a DC power supply, please connect + and – to AC1 and AC2. Turn the power supply on.

3. If PWM dimming is required, provide a 200Hz to 2kHz PWM signal to EN/DIM pin. Remove R5 and

put a 1kΩ resistor on R4.

4. If analog dimming is required, please open R4 and short R5, then provide a 0.3V to 2.5V DC

voltage to the EN/DIM pin.

5. The LED current is adjustable by set current sense resistor R1//R2 as below formula,