MP3384L

50V, 4-String, White LED Driver

MP3384L Rev. 1.0

www.MonolithicPower.com

1

12/27/2013

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© 2013 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP3384L is a step-up converter to control up

to 4 white LED strings for LCD backlighting.

The MP3384L employs a fixed-switching frequency

that can be selected from either 625kHz or

1.25MHz. It takes a 3V-to-25V input supply: The

low-end input voltage allows the MP3384L to power

a tablet display from a single battery.

The MP3384L has 4 internal current sources to

independently regulate the current in each LED

string to a value set by an external, current-setting

resistor. It achieves current balance within 2.5%

regulation accuracy between strings. Its low

600mV regulation voltage for the LED current

sources reduces power loss and improves

efficiency.

The MP3384L features multiple protections,

including under-voltage lockout, MOSFET current

limiting, over-voltage protection, open/short LED

protection, and thermal shut-down.

The MP3384L is available in a 3mm×3mm QFN16

package.

FEATURES

 Highly Efficient

 3V-to-25V Input Voltage Range

 50V Maximum Step-Up Voltage

 Balanced Driver for 4 WLED Strings

 2.5% Current Matching Accuracy Between

Strings

 Selectable Switching Frequency: 625kHz or

1.25MHz

 PWM Dimming

 Programmable Over-Voltage Protection

 Under-Voltage Lockout

 Open and Short LED Protection

 Thermal Shutdown

 3mm×3mm 16-pin QFN Package

APPLICATIONS

 Notebook Computers

 Netbooks and Tablet Computers

 Digital Picture Frames

 Hand-Held Terminal Displays

 Automotive Systems

All MPS parts are lead-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.

TYPICAL APPLICATION