EV3398A-S-00A

4 strings 350mA White LED Driver

Evaluation Board

EV3398A-S-00A Rev.1.0

www.MonolithicPower.com

1

11/6/2013

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© 2013 MPS. All Rights Reserved.

DESCRIPTION

The EV3398A-S-00A is an evaluation board for

the MP3398A, a step-up converter designed for

liquid-crystal displays that employ an array of

LEDs as the light source. It can drive up to 4

strings LEDs in parallel with 350mA/string

maximum current.

The

MP3398A

uses

current

mode,

fixed

switching frequency architecture. The frequency

is programmable by an external frequency

setting resistor. MP3398A drives an external

MOSFET to boost up the output voltage from a

5V to 28V input supply. It regulates the current

in each LED string to the programmed value set

by an external current setting resistor.

The MP3398A can support both analog and

PWM dimming independently to meet the

special dimming mode request. In addition, rich

protection modes are also integrated including

OCP,

OTP,

UVP,

OVP,

LED

short/open

protection, inductor/diode short protection.

The

MP3398A

is

available

in

SOIC16,

TSSOP16 and SOIC20 packages.

ELECTRICAL SPECIFICATIONS

Parameter

Symbol

Value

Units

Input

Voltage

8

– 28

V

LEDs #

4 LED string

12 LEDs/string

LED Current

120/string

mA

FEATURES

 4-String, Max 350mA/String at 10% DPWM

 5V to 28V Input Voltage Range

 2.5% Current Matching Accuracy Between

Strings

 Programmable Switching Frequency

 PWM and Analog Dimming Mode

 Cascading Capability with a Single Power

Source

 LED Open and Short LED Protection

 Programmable Over-Voltage Protection

 Recoverable thermal Shutdown Protection

 Over Current Protection

 Inductor/Diode short Protection

 Under-Voltage Lockout

 SOIC16, TSSOP16 and SOIC20 Packages

APPLICATIONS

 Desktop LCD Flat Panel Displays

 Flat Panel Video Displays

 2D/3D LCD TVs and Monitors

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Products, Quality Assurance page.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.