EV3385-R-00A: 4 STRING WHITE LED CONTROLLER WITH I

EV3385-R-00A Rev.1.1

www.MonolithicPower.com

7

5/21/2015

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

© 2015 MPS. All Rights Reserved.

QUICK START GUIDE

1. Connect the positive and negative terminals of the power supply (4.5V ~ 33V) to the VIN and GND

pins on the EV board, respectively.

2. Connect the positive and negative terminals of the load panel (4 strings) to the LED+ and LED1~4

pins on the EV board, respectively.

3. Drive EN pin high (>1.5V) to enable the MP3385.

4. If work in external dimming mode, please add PWM input signal to PWM terminal on the EV board.

If work in internal dimming mode, nothing is need for PWM pin.

5. Please connect SCL, SDA and GND of EV board to SCL, SDA and GND of a programmable kit

External Connection

Please prepare the relative devices and connecting lines before testing, including a computer (PC), a

plugs. All the devices are ready, complete connection including the three devices shown in the figure 1.

Figure 1—I

Soft Setup

Make sure USB driver installed before running GUI. Then run “MP3385 GUI.exe“ on your PC which

buttons, like radio box, slide, and press button allow control register parameters which are only

accessible through the software. Clicking to any button of GUI means to write/read data to /from

register. With the help of GUI, it will be an easy and relax thing to set 0x00-0x06 registers of MP3385.

The GUI shown in figure2 appears by default when running the software. There are mainly 7 parts

included in MP3385’s GUI.

1) BASIC SETTING

2) DIMMING MODE

3) LED CURRENT SOURSE ENABLE

4) Dimming By I2C Interface

5) FAULT DISPLAY

6) ALL REGISTER DISPLAY

7) USB connection judgment