EV3376-R-00A

8-Channel, Synchronous,

Boost, WLED Driver with I

EV3376-R-00A Rev.1.0

www.MonolithicPower.com

1

9/5/2016

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© 2016 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP3376 is a synchronous boost converter

with 8 current channels designed to drive

WLED arrays for LCD-panel in tablet and

notebook backlighting applications.

The MP3376 uses peak-current mode and

PWM control to maintain boost converter

regulation. The MP3376 employs a standard

switching frequency, full-scale current for each

channel, sync or non-sync mode, dimming

mode

and

duty,

and

various

protection

thresholds.

MP3376 features high efficiency with small on

resistance of switching MOSFET. In addition,

the synchronous rectifier saves PCB size and

total BOM cost.

The MP3376 is available in QFN24 (4mmX4mm)

package.

ELECTRICAL SPECIFICATIONS

Parameter

Symbol

Value

Units

Input Voltage

3 – 30

V

Output Voltage

VLED

<=34.5

V

LEDs #

8 string

LED Current

MAX:50/string

mA

FEATURES

 8-Channel with Max. 50mA/Channel

 Synchronous Converter with LS-FET/HS–

FET 160m/260mΩ on Resistance

 3V to 30V Input Voltage Range

 Up to 36V Output Voltage

 Max 2.5% Current Matching

 350k / 500k / 650k / 800k / 950k / 1.2M /

1.8M

/

2.4MHz

Selectable

Switching

Frequency

 A0, A1 Pins for 4 PCS IC Selection

 0mA to 50mA Full Scale Current Set, 8-bit,

0.196mA/step

 Selectable Sync or Non-Sync Mode

 Multi-Dimming Operation Mode Including:

1. Analog Dimming Mode through External

PWM Input

interface

3. Mix dimming Mode through External

PWM Input with 6.25% / 12.5% / 25% /

50% Transfer Point

with 6.25% / 12.5% / 25% / 50%

Transfer Point

 Customizable Default Register Values

 Linear smooth dimming with 2 / 4 / 8 / 16 / 32

/ 64 / 128us for per step-slope set

 Unused LED string auto disable during

Startup

 LED short/open, OTP, OCP, Inductor or

Diode Short Protection

o

2.5 / 5 / 7.5 / 10V LED Short Threshold

o

24 / 31 / 36V OVP Threshold

o

1.8 / 2.5A Cycle by Cycle Current Limit

 Free for Adjacent Pin Short Test

 Available in QFN24 (4mmX4mm) package

APPLICATIONS

 Tablet/Notebook

 Auto-motive Display

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

MPS green status, please visit MPS website under Quality Assurance. “MPS”

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

Monolithic Power Systems, Inc.