EV4012DS-00A –BOOST WHITE LED DRIVER FOR TV BACKLIGHTING APPLICATION

NOTICE:

The information in this document is subject to change without notice. Please contact MPS for current specifications.

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.

EV4012DS-00A Rev.1.01

www.MonolithicPower.com

6

11/23/2011

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QUICK START GUIDE

1. Check the LED string voltage and preset the input voltage power supply to 50-90V.

2. Set a second power supply 12VIN to 12V as the power supply of IC. Set a third power supply to

5V as the PWM input to the EVB.

3. Connect all SYNC pin of all EVBs for synchronization if necessary.

4. Turn-off all power supplies. Connect all the power supply.

5. Connect the anode of the LED string to LED+, and the cathode to LED-.

6. Turn on the VIN power supply.

7. Turn on the 5V PWM power supply.

8. Turn on the 12VIN power supply. The LED string should be lighten

9. To demo the dimming function: replace the 5V PWM power supply with a function generator.

Set the PWM signal amplitude to 5V and the frequency within 100Hz to 2kHz range.