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MP3384LGQ-P

P1-P3P4-P6P7-P9P10-P12
MP3384L
50V, 4-String, White LED Driver
MP3384L Rev. 1.0 www.MonolithicPower.com 1
12/27/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 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 Monolithi
c
Power Systems, Inc.
TYPICAL APPLICATION
MP3384L – 50V, 4-STRING, WHITE LED DRIVER
MP3384L Rev. 1.0 www.MonolithicPower.com 2
12/27/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number* Package Top Marking
MP3384LGQ
QFN16 (3mm × 3mm)
AFZ
* For Tape & Reel, add suffix –Z (e.g. MP3384LGQ–Z)
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS
(1)
V
IN
................................................0.3V to +30V
V
SW
, V
LED1
to V
LED4
...........................1V to +50V
All Other Pins.................................0.3V to +6V
Continuous Power Dissipation (T
A
= +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 V
IN
..........................+3V to +25V
Operating Junction Temp. (T
J
).40°C to +125°C
Thermal Resistance
(4)
θ
JA
θ
JC
QFN16 (3mm × 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 T
J (MAX)
, the junction-to-ambient
thermal resistance
JA
, and the ambient temperature T
A
. The
maximum allowable continuous power dissipation at any
ambient temperature is calculated by P
D (MAX)
= (T
J (MAX)
-T
A
)/
JA
.
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.
MP3384L – 50V, 4-STRING, WHITE LED DRIVER
MP3384L Rev. 1.0 www.MonolithicPower.com 3
12/27/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
V
IN
=12V, V
EN
= 5V, T
A
= +25°C, unless otherwise noted.
Parameters Symbol Condition Min Typ Max Units
Operating Input Voltage V
IN
3 25 V
Supply Current (Quiescent) I
Q
V
IN
=12V, V
EN
=5V, no load. 1.8 mA
Supply Current (Shutdown) I
ST
V
EN
=0V, V
IN
=12V 2 A
LDO Output Voltage V
CC
V
EN
=5V, 6V<V
IN
<25V,
0<I
VCC
<10mA
4.5 5 5.5 V
VCC High Threshold V
CC_
rising 3 V
VCC Low Threshold V
CC_
falling 2.2 V
EN ON Threshold V
EN_ON
V
EN
Rising 1.8 V
EN OFF Threshold V
EN_OFF
V
EN
Falling 0.6 V
STEP-UP CONVERTER
SW On-Resistance R
DS_ON
I
DS
=20mA 0.5
SW Leakage Current I
SW_LK
V
SW
=45V 1 A
V
OSC
=V
CC
or Floating 1.0 1.25 1.5 MHz
Switching Frequency f
SW
V
OSC
=0V 500 625 750 kHz
OSC High-Level Threshold V
OSC_H
2.1 V
OSC Low-Level Threshold V
OSC_L
0.8 V
Minimum ON Time τ
ON_MIN
PWM Mode without Pulse Skipping 100 ns
Maximum Duty Cycle D
MAX
90 93 96 %
SW Current Limit I
SW_LIMIT
Duty=90% 1.2 A
COMP Transconductance G
COMP
I
COMP
=±10µA 100 A/V
COMP Output Current I
COMP
60 A
PWM DIMMING
PWM High-Level Threshold V
PWMI_H
1.5 V
PWM Low-Level Threshold V
PWMI_L
0.6 V
LED CURRENT REGULATION
LEDx Average Current I
LED
R
ISET
=60.4k 19.4 20 20.6 mA
Current Matching
(5)
I
LED
=20mA 2.5 %
Maximum LED Current per
String
I
LEDmax
R
ISET
=40.2k 30 mA
LEDx Regulation Voltage V
LEDX
I
LED
=20mA 600 mV
PROTECTION
OVP Over Voltage Threshold V
OVP_OV
Rising Edge 1.17 1.23 1.3 V
OVP UVLO Threshold V
OVP_UV
Step-Up-Converter Failure 48 70 102 mV
LEDx Over Voltage Threshold V
LEDX_OV
V
IN
>5.5V 5.1 5.5 5.9 V
LEDx UVLO Threshold V
LEDX_UV
135 180 235 mV
Thermal Shutdown Threshold T
ST
150 °C
LEDx Over-Voltage Fault
Timer
1.3 1.6 1.9 ms
Notes:
5) Matching is defined as the difference between the maximum and minimum current divided by 2×average current
P1-P3P4-P6P7-P9P10-P12

MP3384LGQ-P

Mfr. #:
Buy MP3384LGQ-P
Manufacturer:
Monolithic Power Systems (MPS)
Description:
LED Lighting Drivers 3Vin 4-Ch WLED Drvr LCD Backlighting
Lifecycle:
New from this manufacturer.
Delivery:
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