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MP3389EF-LF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
MP3389
12–String, Step-up
White LED Driver
MP3389 Rev. 1.04 www.MonolithicPower.com 1
3/27/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP3389 is a step-up controller with 12-
channel current sources designed for driving
the WLED arrays for large size LCD panel
backlighting applications.
The MP3389 uses current mode, fixed frequency
architecture. The switching frequency is
programmable by an external frequency setting
resistor. It drives an external MOSFET to boost
up the output voltage from a 5V to 28V input
supply. The MP3389 regulates the current in
each LED string to the programmed value set by
an external current setting resistor.
The MP3389 applies 12 internal current
sources for current balance. And the current
matching can achieve 2.5% regulation accuracy
between strings. Its low 550mV regulation
voltage on LED current sources reduces power
loss and improves efficiency.
PWM dimming is implemented with external
PWM input signal or DC input signal. The
dimming PWM signal can be generated internally,
and the dimming frequency is programmed by
an external setting capacitor.
FEATURES
• High Efficiency and Small Size
• 5V to 28V Input Voltage Range
• Balanced Driver for 12 Strings of WLEDs
• Maximum 60mA for Each String
• 2.5% Current Matching Accuracy Between
Strings
• Programmable Switching Frequency
• PWM or DC Input Burst PWM Dimming
• Open and Short LED protection
• Programmable Over-voltage Protection
• Under Voltage Lockout
• Thermal Shutdown
• 28-pin TSSOP and 28-pin SOIC Package
APPLICATIONS
• Desktop LCD Flat Panel Displays
• Flat Panel Video Displays
• LCD TVs and Monitors
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
VIN
5V~28V
MP3389
ISENSE
GATE
EN
OSC
NC
BOSC
GND
DBRT
NC
OVP
LED1
LED2
LED3
8
1
10
7
6
9
26
24
28
23
22
21
Enable
DIMMING
L1
D1
C
IN
R1
R2
R
SET
CBOSC
ROSC
RSENSE
M2
LED4
LED5
LED6
RCOMP
20
19
18
17
VIN
VCC
COMP
2
3
4
5
ISET
COUT
CCOM P
CVCC
RBOSC
VCC
LED12
LED11
LED10
11
12
13
14
LED9
VFAU LT
27
PGND
25
LED7
LED8
16
15
M1
MP3389—12-STRING WHITE LED DRIVER WITH STEP-UP CONTROLLER
MP3389 Rev. 1.04 www.MonolithicPower.com 2
3/27/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2013 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number* Package Top Marking
MP3389EF TSSOP28 3389EF
MP3389EY SOIC28 3389EY
*For Tape & Reel, add suffix –Z (eg. MP3389EF–Z).
For RoHS compliant packaging, add suffix –LF (eg. MP3389EF–LF–Z)
**For Tape & Reel, add suffix –Z (eg. MP3389EY–Z).
For RoHS compliant packaging, add suffix –LF (eg. MP3389EY–LF–Z)
PACKAGE REFERENCE
NC
VIN
VCC
COMP
EN
DBRT
GND
OSC
ISET
BOSC
LED12
LED11
LED10
LED9
NC
VFAULT
GATE
PGND
ISENSE
OVP
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
TOP VIEW
TSSOP28 SOIC28
ABSOLUTE MAXIMUM RATINGS
(1)
V
IN
.................................................-0.3V to +30V
V
VFAULT
........................................... V
IN
- 6V to V
IN
V
GATE
..............................................-0.5V to 6.3V
V
LED1
to V
LED12
..................................-1V to +50V
All Other Pins...............................-0.3V to +6.3V
Continuous Power Dissipation (T
A
= +25°C)
(2)
TSSOP28……………………………… ...3.9W
SOIC28………………………………… ...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
..............................5V to 28V
LED Current (Backlight) .............10mA to 60mA
Operating Junction Temp. (T
J
). -40°C to +125°C
Thermal Resistance
(4)
θ
JA
θ
JC
TSSOP28................................32 ....... 6 .... °C/W
SOIC28 ..................................60 ...... 30 ... °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 powe
r
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.
MP3389—12-STRING WHITE LED DRIVER WITH STEP-UP CONTROLLER
MP3389 Rev. 1.04 www.MonolithicPower.com 3
3/27/2013 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
4.5 28 V
Supply Current (Quiescent) I
Q
V
IN
=12V, V
EN
=5V, no load with
switching
4 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
<28V,
0<I
VCC
<10mA
4.5 5 5.5 V
Input UVLO Threshold V
IN_UVLO
Rising Edge 3.4 3.9 4.3 V
Input UVLO Hysteresis 200 mV
EN High Voltage V
EN_HIGH
V
EN
Rising 1.6 V
EN Low Voltage V
EN_LOW
V
EN
Falling 0.6 V
STEP-UP CONVERTER
Gate Driver Impedance
(Sourcing)
V
CC
=5V,V
GATE
=5V 4
Gate Driver Impedance
(Sinking)
V
CC
=5V,I
GATE
=10mA 2
R
OSC
= 115k 530 590 650 kHz
Switching Frequency f
SW
R
OSC
= 374k 160 180 200 kHz
OSC Voltage V
OSC
1.18 1.23 1.28 V
Minimum On Time T
ON_MIN
PWM Mode,
when no pulse skipping happens
100 ns
Maximum Duty Cycle D
MAX
90 %
ISENSE Limit Max Duty Cycle 175 220 265 mV
Leading Edge Blanking Time
(6)
T
LEB
250 ns
PWM DIMMING
DBRT Leakage Current I
DBRT_LK
-5 +5 A
BOSC Frequency F
BOSC
C
BOSC
=2.2nF 1.2 1.6 2 kHz
BOSC Output Current I
BOSC
6.37 7.5 8.63 A
LED CURRENT REGULATION
ISET Voltage V
ISET
1.20 1.22 1.245 V
LEDX Average Current I
LED
R
ISET
=40k 29.6 30.5 31.4 mA
Current Matching
(5)
I
LED
=30.5mA 2.5 %
LEDX Regulation Voltage V
LEDX
I
LED
=30.5mA 410 550 690 mV
PROTECTION
OVP Over Voltage Threshold V
OVP_OV
Rising Edge 1.20 1.23 1.26 V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MP3389EF-LF

Mfr. #:
Buy MP3389EF-LF
Manufacturer:
Monolithic Power Systems (MPS)
Description:
LED Lighting Drivers High V 12-String Boost WLED Ctlr
Lifecycle:
New from this manufacturer.
Delivery:
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