EV3391EF-00A 8 STRING WHITE LED DRIVER

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.

EV3391EF-00A Rev. 1.0

www.MonolithicPower.com

7

11/9/2011

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

© 2011 MPS. All Rights Reserved.

QUICK START GUIDE

1. Connect the positive and negative terminals of the load panel (12 white LEDs in series, 8 strings

paralleled) to the LED+ and LED1~8 pins on the EV board, respectively.

2. Connect the positive and negative terminals of the power supply (10V ~ 28V) to the VIN and

GND pins on the EV board, respectively.

3. Drive EN pin high (5V) to enable the MP3391EF.

4. For PWM dimming, connect a 100kΩ resistor from BOSC pin to GND and apply a PWM

rectangular waveform on DBRT pin. The minimum recommended amplitude of the PWM signal

is 1.2V. PWM signal is recommended between 100Hz to 2kHz.

5. If 16 LED strings is required, please add 0Ω resistor (0603) on R32, R33 and R36 to make the

two ICs work in parallel.