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MP3384EQ Datasheet Preview

MP3384EQ Datasheet

4-String White LED Driver

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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
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.




MPS

MP3384EQ Datasheet Preview

MP3384EQ Datasheet

4-String White LED Driver

No Preview Available !

MP3384- 50V, 4-STRING WHITE LED DRIVER
ORDERING INFORMATION
Part Number*
MP3384EQ
Package
QFN16 (3mm X 3mm)
Top Marking
5S
* For Tape & Reel, add suffix –Z (e.g. MP3384EQ–Z).
For RoHS compliant packaging, add suffix –LF (e.g. MP3384EQ–LF–Z)
PACKAGE REFERENCE
PIN 1 ID TOP VIEW
VIN VCC COMP SW
16 15 14 13
EN 1
12 PGND
OSC 2
11 NC
ISET 3
10 OVP
GND 4
9 LED4
5
6
7
8
PWM LED1 LED2 LED3
EXPOSED PAD
CONNECT TO PIN 12
ABSOLUTE MAXIMUM RATINGS (1)
VIN .................................................-0.3V to +30V
VSW, VLED1 to VLED4............................-1V to +50V
All Other Pins ..................................-0.3V to +6V
Continuous Power Dissipation (TA = +25°C) (2)
………………………………………………....2.1W
Junction Temperature ...............................150°C
Lead Temperature ....................................260°C
Storage Temperature............... -65°C to +150°C
Recommended Operating Conditions (3)
Supply Voltage VIN ...........................4.5V to 25V
Max LED Current/String............................ 40mA
Operating Junction Temp. (TJ). -40°C to +125°C
Thermal Resistance (4) θJA θJC
QFN16 (3mm x 3mm) ...........60 ...... 12 ... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature TJ (MAX), the junction-to-ambient
thermal resistance θJA, and the ambient temperature TA. The
maximum allowable continuous power dissipation at any
ambient temperature is calculated by PD (MAX) = (TJ (MAX)-TA)/θJA.
Exceeding the maximum allowable power dissipation will
cause excessive die temperature, and the regulator will go into
thermal shutdown. Internal thermal shutdown circuitry protects
the device from permanent damage.
3) The device is not guaranteed to function outside of its
operation conditions.
4) Measured on JESD51-7, 4-layer PCB.
MP3384 Rev. 1.01
www.MonolithicPower.com
2
1/29/2013
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.


Part Number MP3384EQ
Description 4-String White LED Driver
Maker MPS
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