MPS

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EV3398T-F-00A

4 strings, 80V Return Voltage WLED Driver

Evaluation Board

EV3398T-F-00A Rev.1.0

www.MonolithicPower.com

1

1/12/2016

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

© 2016 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP3398T is a step-up controller with 4

current channels, which is designed to drive

WLED

arrays

for

large-size

LCD-panel

backlighting applications. It is able to expand

the number of LED channels with two or more

ICs in parallel sharing a single power source.

The MP3398T uses peak-current mode with a

fixed switching frequency. The frequency is

programmable through an external setting

resistor. The MP3398T drives an external

MOSFET to boost up the output voltage from a

4.5V to 33V input supply. It regulates the

current in each LED string to the value set by

an external current-setting resistor.

The MP3398T applies 4 internal current

sources for current balance. The current

matching can achieve 2% regulation accuracy

between strings. Its low regulation voltage on

LED current sources reduces power loss.

The MP3398T supports direct PWM dimming.

In addition, rich protection modes are integrated

including

OCP,

OTP,

UVP,

OVP,

LED

short/open

protection,

inductor/diode

short

protection.

The MP3398T is available in a TSSOP-16EP

package.

ELECTRICAL SPECIFICATIONS

Parameter

Symbol

Value

Units

Input

Voltage

13 – 33

V

LEDs #

4 LED strings

20 LEDs/string

LED Current

120/string

mA

FEATURES

• 4-String, Max 400mA/String WLED Driver

• 4.5V to 33V Input Voltage Range

• 80V Abs. Rating for Each String

• 2% Current Matching Accuracy Between

Each String

• PWM Dimming

• Cascading Capability with a Single Power

Source

• LED Open and Short LED Protection

• Programmable Recoverable Over Voltage

Protection

• 0.2V Latch-off OCP Protection Threshold.

• Recoverable thermal Shutdown Protection

• TSSOP-16EP Package

APPLICATIONS

• Desktop LCD Flat Panel Displays

• All in one

• 2D/3D LCD TVs

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.