MP3367

6-Channel, Max.150mA/Ch

Boost WLED Driver

with 15000:1 Dim Ratio and I2C

MP3367 Rev. 1.0

www.MonolithicPower.com

1

6/17/2019

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

© 2019 MPS. All Rights Reserved.

DESCRIPTION

The MP3367 is a step-up converter with six

channel current sources, designed to drive white

LED arrays as backlighting in small-to-mid-size

LCD panels.

The MP3367 uses peak current mode as its

PWM control architecture to regulate the boost

converter. Six channel current sources are

applied into the LED cathode to adjust the LED

brightness. The MP3367 regulates the current in

each LED string to the value set by an external

current-setting

resistor,

with

2.5%

current

regulation accuracy between strings.

The

MP3367

employs

a

low

on-resistor

MOSFET and a low headroom voltage, designed

for higher efficiency. It has a standard I2C digital

interface for ease of

use.

The switching

frequency can be programmed by a resistor, I2C

interface, or external clock.

The MP3367 provides analog, PWM, and mix

dimming mode with a PWM input. Dimming

mode can be selected with the I2C interface or

the MIX/AD pin. It also has a phase shift function

to eliminate noise during PWM dimming.

Robust protections are included to guarantee

safe operation of the device. Protection modes

include over-current protection (OCP), over-

voltage

protection

(OVP),

over-temperature

protection

(OTP),

LED

short,

and

open

protection.

There

is

also

an

option

that

automatically decreases the LED current at

higher temperatures.

The MP3367 is available in QFN-24 4mmx4mm

and TSSOP28-EP packages.

FEATURES

 3.5V to 36V Input Voltage Range

 Six Channels with Max 150mA per

Channel

 Internal 100mΩ, 50V MOSFET

 Programmable Up to 2.2MHz f

SW

 External Sync SW Function

 Multi-Dimming Operation Mode through

PWM Input, Including:

o

Direct PWM Dimming

o

Analog Dimming

o

Mix Dimming with 25%/12.5%

Transfer Point

 15000:1 Dim Ratio in PWM Dim at f

PWM ≤

200Hz

 200:1 Dim Ratio at Analog Dim through

PWM Dim Signal Input

 Excellent EMI Performance, Frequency

Spread Spectrum

 I2C Interface

 Phase Shift Function for PWM Dimming

 2.5% Current Matching

 Cycle-by-Cycle Current Limit

 Disconnect VOUT from VIN

 Optional LED Current Auto-Decrement at

High Temperatures

 LED Short/Open, OTP, OCP, and Inductor

Short Protections

 Programmable LED Short Threshold

 Programmable OVP Threshold

 Fault Indicator Signal Output

 Available in QFN-24 4mmx4mm and

TSSOP28-EP Packages

APPLICATIONS

 Tablet/Notebook

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

MPS green status, visit the MPS website under Quality Assurance.

“MPS”, the

MPS logo,

and “Simple, Easy Solutions” are registered trademarks of Monolithic

Power Systems, Inc. or its subsidiaries.