EV3305DD-00A

1.3A Fixed Frequency White LED Driver

Evaluation Board

EV3305DD-00A Rev. 1.0

www.MonolithicPower.com

1

1/6/2009

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2009 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The EV3305DD-00A is an evaluation board for the

MP3305DD, a monolithic step-up converter

designed for driving arrays of WLEDs from 5V input

or a single cell Lithium Ion battery. The EV board is

optimized for the load of 3 white LEDs in series, 10

strings panel.

The MP3305 uses current mode, fixed frequency

architecture to regulate the LED current, which is

measured through an external current sense

resistor. Its low 200mV feedback voltage reduces

power loss and improves efficiency.

The MP3305 features up to 50kHz true PWM

dimming, which allows the flexible control of the

backlighting luminance under wide range of the

ambient brightness, and also avoids

the

possibility of PWM dimming audible noise.

The MP3305 is turned off if an over-voltage

condition is present due to an open circuit

condition. Use one external resistor voltage

divider to program OVP threshold. MP3305 also

includes under-voltage lockout, current limiting

and thermal overload protection preventing

damage in the event of an output overload.

The MP3305 is available in small 8-pin QFN

(2mm x 3mm) package.

FEATURES

• 5V Input Voltage Range

• Drives up to 30 White LEDs

• Programmable Open Load Shutdown

Threshold

• Up to 88% Efficiency

• Fully Assembled and Tested

APPLICATIONS

• Cell Phones

• Handheld Computers and PDAs

• Digital Still Cameras

• Small LCD Displays

ELECTRICAL SPECIFICATIONS

Parameter

Symbol

Value

Units

Input Voltage

5

V

# of WLEDs

30(3 in series, 10

strings paralleled)

LED Current

200

A

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

EV3305DD-00A EVALUATION BOARD

(L x W x H) 1.8” x 1.8” x 0.4”

4.6cm x 4.6cm x 1.0cm

Board Number

MPS IC Number

EV3305DD-00A

MP3305DD

50

60

70

80

90

100

3 3.5

4 4.5

5 5.5

6 6.5