MP3384 Datasheet, PDF (1/13 Pages) Monolithic Power Systems – 50V, 4-String White LED Driver

The Future of Analog IC Technology
MP3384
50V, 4-String White LED Driver
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
MP3384 Rev. 1.01
www.MonolithicPower.com
1
1/29/2013
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