MP3384

50V, 4-String White LED Driver

MP3384 Rev. 1.01

www.MonolithicPower.com

1

1/29/2013

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© 2013 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP3384 is a step-up converter with

4-channel current sources designed for driving

the white LED arrays for large size LCD panel

backlighting applications.

The MP3384 uses current mode, fixed frequency

architecture. The switching frequency can be

selected at 1.25MHz or 625kHz. It generates an

output voltage up to 50V from a 4.5V to 25V input

supply. The MP3384 independently regulates the

current in each LED string to the user programmed

value set by an external current setting resistor.

The MP3384 applies 4 internal current sources to

achieve a current balance of 2.5% regulation

accuracy between strings. Its low 600mV

regulation voltage on LED current sources reduces

power loss and improves efficiency.

The MP3384 includes under voltage lockout,

current limiting, over voltage, short LED, open LED

and thermal shut-down protection.

The MP3384 is available in small QFN16

(3mmx 3mm) package.

FEATURES

• High Efficiency and Small Size

• 4.5V to 25V Input Voltage Range

• 50V Maximum Step-up Voltage

• Balanced Driver for 4 Strings of WLED

• 2.5% Current Matching Accuracy Between

Strings

• Selectable Switching Frequency: 1.25MHz or

625kHz

• PWM Dimming

• Programmable Over-voltage Protection

• Under Voltage Lockout

• Open and Short LED Protection

• Thermal Shutdown

• Small 16-pin QFN (3mm x 3mm)

APPLICATIONS

• Notebook PC

• Netbook PC

• Digital Picture Frames

• Handy Terminals Display

• Automotive System and Tablet Computer

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