EV4603-S-00A – EVB DESCRIPTION

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.

EV4603ES-00A Rev.1.0

www.MonolithicPower.com

6

4/12/2012

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

© 2012 MPS. All Rights Reserved.

QUICK START GUIDE

1. Check the LED string voltage and preset the high voltage power supply’s output. For example,

2. Set a second power supply VIN to 12V as the input of all the EVBs. Set a third power supply to

5V as the EN input to all the EVBs, Set a fourth power supply to 5V as the ADIM input of all

EVBs. Set another power supply to 5V as the PWM input of all EVBs.

3. Turn-off all power supplies.

4. Connect the positive terminal of the high voltage power supply to all the anodes of the LED

strings, and the negative terminal to all the EVB ‘GND’ connector.

5. Connect each LED string cathode to the ‘LED-’ connector on one EVB individually (one EVB for

one LED string).

6. Connect VIN (12V) the positive terminal to all the EVB ‘VIN’ connectors and the negative

terminal to all the EVB GND connectors.

7. Connect the 5V PWM power supply positive terminal to all the EVB ‘PWM’ connectors, and

negative terminal to all the EVB ‘GND’ connectors.

8. Connect the 5V ‘ADIM’ power supply positive terminal to all the EVB ‘ADIM’ connectors, and

negative terminal to all the EVB ‘GND’ connectors.

9. Connect the 5V EN power supply positive terminal to all the EVB ‘EN’ connectors, and negative

terminal to all the EVB ‘GND’ connectors.

10. Connect all ‘SYNC’ pin of all EVBs together for synchronization if necessary.

11. Turn on the high voltage power supply.

12. Turn on the 12V power supply.

13. Turn on the 5V PWM power supply.

14. Turn on the 5V ADIM power supply.

15. Turn on the 5V EN power supply. All the LED strings should be lighted.

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

Set the PWM signal amplitude from 2.5V to 5V and the frequency within 100Hz to 20kHz range.

17. For analog dimming, adjust the power supply on ‘ADIM’ connector from 0V to 1.2V

18. To demo the EVB in Boost mode, connect the LED load as follow: Anode to ‘BOOST’ and

Cathode to ‘LED-‘

19. To demo the EVB in Buck mode, open ‘JP1’ and short ‘JP2’. The anode and cathode of the LED

string are connected to "LED+" and "LED-" separately.