EV3378E-F-00A – 4-CHANNEL WLED DRIVER WITH BUCK CONVERTER

PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE

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.

EV3378E-F-00A Rev. 1.0

www.MonolithicPower.com

8

2/17/2016

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

Preliminary Specifications Subject to Change

© 2016 MPS. All Rights Reserved.

QUICK START GUIDE

1. For boost LED driver, connect the positive and negative terminals of the load panel (10 white

LEDs in series, 4 stings) to the LED+ and LED-1~4 pins on the EV board, respectively;

For buck converter, connect the load between Vout to GND.

2. Connect the positive and negative terminals of the power supply (8V ~ 24V) to the VIN and

GND pins on the EV board, respectively.

3. Drive EN1 pin high (5V) to enable the Boost and EN2 pin high to enable the Buck.

4. For PWM dimming, apply a PWM rectangular waveform with a minimum voltage less than 0.4V

and a maximum greater than 1.5V on PWM pin (if using PWM pin, need pull ADIM pin to high

level). The frequency of the PWM signal is recommended between 200Hz to 2kHz.

5. For analog dimming, apply a DC waveform with a voltage between 0.4 and 1.5V on ADIM pin or

a PWM rectangular waveform with a minimum voltage less than 0.4V and a maximum greater

than 1.5V on ADIM pin, The frequency of the PWM signal is recommended >=20kHz..