EV3373-M-00A, 8 STRINGS, WLED CONTROLLER WITH EXTERNAL TRANSISTOR

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.

EV3373-M-00A Rev.1.0

www.MonolithicPower.com

7

7/11/2014

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QUICK START GUIDE

1. Connect the positive and negative terminals of the load panel (10 white LEDs in series, 8 stings)

to the LED+ and LED-1~8 pins (external PNP’s Emitter) on the EV board, respectively.

2. Connect the positive and negative terminals of the power supply (9V ~ 28V) to the VIN and

GND pins on the EV board, respectively.

3. Drive EN pin high (5V) to enable the MP3373.

4. For PWM dimming, apply a PWM rectangular waveform with a minimum voltage less than 0.3V

and a maximum greater than 1.6V on EN/PWM pin or DIM pin ( if using EN/PWM pin, need pull

DIM 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 DIM pin.