MICROSEMI LXMG1645-24-53

RangeMax™ StayLIT™
®
TM
LXMG1645-24-53
24V Quad 5W CCFL Inverter Module
P RODUCTION D ATA S HEET
KEY FEATURES
DESCRIPTION
significant power savings at lower dim
levels.
The inverter also has a dedicated
FAIL pin that indicates an open/shorted
lamp condition. In addition when only
one or two lamps on either side sustain a
fault the lamps on the other side will
remain in normal operation. This mode
of operation during lamp(s) failure is
called StayLit™ since the panel is able to
still remain on although at reduced
brightness.
The module’s design is based on
Microsemi’s
LX6512
backlight
controller, which provides a number of
cost and performance advantages due to
the controller’s high level of integration.
Other benefits of this new topology
are stable fixed-frequency operation and
secondary-side strike-voltage regulation.
ƒ StayLIT™ Redundancy
ƒ PWM Brightness Control
ƒ RangeMAX™ Wide Range
Dimming
ƒ Output Short-Circuit Protection
and Automatic Strike-Voltage
Regulation
ƒ Fixed Frequency Operation
ƒ Rated From -30 to 80°C
ƒ UL 60950 Pending
ƒ RoHS Compliant
WWW . Microsemi .C OM
The LXMG1645-24-53 is a Quad 5W
Output CCFL (Cold Cathode Fluorescent
Lamp) Inverter Module specifically
designed for driving NEC NL12876BC2625 LCD panel or similar quad lamp panels.
The inverter includes a dimming input
that permits brightness control from a
PWM signal.
RangeMAX™ Digital
Dimming Technique provides flicker-free
brightness control in any wide range
(typically 50:1+) dimming application.
The module converts a DC voltage
from the system battery or AC adapter
directly to high frequency, high-voltage
waves required to ignite and operate CCFL
lamps. The resultant “burst drive” that
energizes the lamp was designed
specifically to ensure that no premature
lamp degradation occurs, while allowing
APPLICATIONS
ƒ High Brightness Displays
ƒ Desktop Displays
ƒ Medical Monitors
BENEFITS
ƒ Smooth, Flicker Free 2%100% Optical Brightness
Range
ƒ
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Protected By U.S. Patents: 5,923,129; 5,930,121; 6,198,234; Patents Pending
PRODUCT HIGHLIGHT
Lamp
Fault
Signal
HI
HI
CN1
4
W
2
3
1
CN4
3
2
CN3
4
1
W
W
4
1
3
2
CN2
2
3
CN5
1
4
W
HI
PWM DIMMING INPUT
HI
PACKAGE ORDER INFO
PART NUMBER
OUTPUT CONNECTORS
INVERTER MATES DIRECTLY
TO PANEL CONNECTORS
LXMG1645-24-53
Four JST SM02(8.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-05A00
JST BHR-03VS-1
Copyright © 2010
Rev. 1.0, 2010-10-13
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
LXMG1645-24-53
MICROSEMI
RangeMax™ StayLIT™
®
TM
LXMG1645-24-53
24V Quad 5W CCFL Inverter Module
P RODUCTION D ATA S HEET
WWW . Microsemi .C OM
ABSOLUTE MAXIMUM RATINGS
Input Signal Voltage (VIN, FAIL ) ............................................................................................................................-0.3V to 30V
Input Power ....................................................................................................................................................................... 24W
Output Voltage, no load ............................................................................................................................................. 1900VRMS
Output Current(each output) ........................................................................................................................................... 9.0mA
Output Power(each output) ................................................................................................................................................. 5W
Input Signal Voltage (ENABLE, PWM) .................................................................................................................-0.3V to 5.5V
Ambient Operating Temperature, zero airflow .................................................................................................... -30°C to 80°C
Operating Relative Humidity, Non-condensing ........................................................................................................ 0% to 95%
Storage Temperature Range .............................................................................................................................. -40°C to 90°C
Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal.
RECOMMENDED OPERATING CONDITIONS (R.C.)
This module has been designed to operate over a wide range of input and output conditions. However, best efficiency and performance
will be obtained if the module is operated under the condition listed in the ‘R.C.’ column. Min. and Max. columns indicate values beyond
which the inverter, although operational, may not function optimally.
Parameter
Symbol
Input Supply Voltage Range (Fully Regulated Lamp
Current)
Output Power (each output)
DC BRITE Control Input Voltage Range
Duty Control Range
1
Burst Frequency
Direct Low Frequency
PWM
Amplitude
Rise/Fall Time
2
Lamp Current (Full Brightness)
Lamp Operating Voltage
Recommended Operating Conditions
Min
R.C.
Max
VIN
21.6
PO
VBRT
FDUTY
FPWM
VPWM
Tr, Tf
IOLAMP
VLAMP
0
10
100
3.0
0
5.5
530
Units
24
26.4
V
4.0
5.0
3.0
100
225
5.5
3
6.5
720
W
V
%
Hz
V
µS
mARMS
VRMS
120
6.0
625
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of 0°C
to 60°C except where otherwise noted; ENABLE > 2.5V, VIN = 24V, FDUTY=100%, FPWM = 120Hz, Ta = 25°C.
Parameter
Symbol
Test Conditions / Comment
Min
Max
Units
6.0
6.5
mARMS
LXMG1645-24-53
Typ
OUTPUT CHARACTERISTICS
Full Bright Lamp Current (Each Lamp)
IOL100n3
PWM = 100% or Open
Full Dim Lamp Current (Each Lamp)
IOL100n
VB = 3V, PWM=10%
1.6
mARMS
Lamp Run Voltage (Each Lamp)
VL_RUN
PWM = 100% or Open
670
VRMS
Lamp Start Voltage (Each Lamp)
VLS
Operating Frequency
FO
Optical Dim Range (by PWM)
4
Output Current Lamp to Lamp
Deviation
Copyright © 2010
Rev. 1.0, 2010-10-13
N:1_BRTP
ΔIOLm,n
5.5
1820
TA = -30°C, VIN ≥ 21.6V
45.5
Center Area Brightness, Max/Min
I OL m − I OL n
m=1,2,3,4, n= 1~4 not m
I OL m
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
47.5
VRMS
48.0
kHz
50
Ratio
5
%
Page 2
RangeMax™ StayLIT™
®
TM
LXMG1645-24-53
24V Quad 5W CCFL Inverter Module
P RODUCTION D ATA S HEET
ELECTRICAL CHARACTERISTICS
WWW . Microsemi .C OM
Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of 0°C
to 60°C except where otherwise noted; ENABLE > 2.5V, VIN = 24V, FDUTY=100%, FPWM = 120Hz, Ta = 25°C.
Parameter
Symbol
Test Conditions / Comment
Min
Typ
Max
Units
PWM INPUT, PWM DIM CONTROL
PWM High Level Amplitude
VPWMH
PWM Low Level Amplitude
VPWML
PWM Jitter
Jitter
PWM Frequency Range
FPWM
100
PWM Duty Range
FDUTY
Disable Off
VEN_OFF
ENABLE On
VEN_ON
ENABLE On
VEN_ON
3
V
0.3
V
3
µs
225
Hz
10
100
%
0
0.5
V
2.5
5.5
V
2.8
5.5
V
400
µA
120
ENABLE INPUT
VIN Quiescent Current
I_Q
Power On Sequence VIN to ENABLE
TPWR_ON
TA = -30°C
ENABLE= 0V
VIN = 24V +/- 10% before ENABLE Goes High
260
1
msec
POWER CHARACTERISITICS
Supply Current
VIN Under Voltage Lock Out Threshold
IRUN
No Lamp Fault
710
VIN UVLO
VIN Rising Edge
20
V
0.7
V
VIN UVLO Hysteresis
VHYS
Supply Current During Fault Timeout
IFLT
η
Efficiency
mA
30
mA
90
%
1200
msec
1650
VRMS
VIN
V
All 4 Lamps Open
Load = 110k Resistive Load
853
85
STRIKE TIMEOUT
Strike (All Open Lamps)
TS_DWELL
Open Lamp Output Voltage
VSTK
All Lamps Not Connected
FAIL
FAIL Pin Voltage
VFLT_N
FAIL Pin Leakage Current
IFLT_LKG
No Fault , Pull-up 2.4kΩ to VIN
10
µA
FAIL Pin Voltage
VFLT_F
Open Lamp , Pull-up 2.4kΩ to VIN
0.4
V
FAIL Invalid Time
TSTRIKE
All 4 Lamps Open
2.5
sec
FAIL Sensing Time
TD_FAIL
From Occurrence of One Lamp Open or Short
275
msec
No Fault , Pull-up 2.4kΩ to VIN
STRIKE MODE
StayLIT™ Strike Time Period
TSL_TO
Only One of Two Lamps Ignited on CN2~CN3
or CN4 ~ CN5
600
msec
LXMG1645-24-53
LAMP CURRENT
Lamp Current Of Non-Faulty Side
Open or Short One Lamp, Full Bright
IL_FN
5.7
( Open or Short)
Lamp Current Of Non-Faulty Side
Open or Short One Lamp, Full Dim
IL_FN
( Short or Short)
1
Direct PWM (low) frequency should be selected such to not have optical interference.
2
Lamp current is specified with NEC NL12876BC26-25 and all 4 lamps connected with frame of panel grounded.
3
n is lamp number CN1 Æ 1, CN2Æ 2, CN3 Æ 3, CN4 Æ 4
4
At room temp, 1 hour full brightness operation and 1 hour full dim operation measurement ratio.
Copyright © 2010
Rev. 1.0, 2010-10-13
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
6.2
1.65
6.7
mARMS
mARMS
Page 3
RangeMax™ StayLIT™
®
TM
LXMG1645-24-53
24V Quad 5W CCFL Inverter Module
P RODUCTION D ATA S HEET
WWW . Microsemi .C OM
FUNCTIONAL PIN DESCRIPTION
CONN
PIN
DESCRIPTION
CN1 (Wurth Electronik 690367291076 or equivalent)
CN1-1
CN1-3
VIN
Main Input Power Supply 21.6V ~ 26.4V
CN1-5
CN1-2
CN1-4
GND
Power Supply Return
CN1-6
CN1-7
NC
NC
CN1-8
ENABLE
CN1-9
PWM
Low Frequency Burst PWM Dimming input
CN1-10
FAIL
Fail Status Output: Normal State: Open Drain Output, Fail State ‘0V’
ON/OFF Control, ON: 2.5V ~ 5.5V, OFF: 0 ~ 0.5V or Open
CN2, CN3, CN4, CN5 (JST SM02(8.0)B-BHS-1-TB(LF)(SN) | Yeon Ho 20015WR-05A00 or equivalent)
CN2-1, CN3-1
CN4-1, CN5-1
LAMPHI
High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length.
DO NOT connect to ground.
CN2-3, CN3-3
CN4-3, CN5-3
LAMPLO
Connection to Low Side of Lamp. Connect to Lamp Terminal with Longer Lead Length.
DO NOT connect to ground
LXMG1645-24-53
Copyright © 2010
Rev. 1.0, 2010-10-13
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
RangeMax™ StayLIT™
®
TM
LXMG1645-24-53
24V Quad 5W CCFL Inverter Module
P RODUCTION D ATA S HEET
FAULT Definition: (F)
1.
2.
3.
4.
5.
OPEN:(O)
SHORT1:(S1)
SHORT2:(S2)
SHORT3:(S3)
ARCING:
F
Lamp is not connected ( either high side wire open or return wire open)
Lamp high side wire is shorted to lamp return side wire
Lamp high side wire is shorted to ground
Lamp return wire is shorted to GND
Lamp High side wire is creating the arcing path after the inverter is enabled.
means either O , S 1 , S 2 , O R S 3
N = Connected lamp and normal operation
Fault Conditions
Inverter Operation
Lamp
1
N
N
Lamp
2
N
N
Lamp
3
N
N
Lamp
4
N
F
N
N
F
N
N
N
F
F
N
F
N
N
N
F
N
F
N
F
F
N
N
F
F
F
F
N
N
N
F
N
N
F
F
N
F
N
F
N
F
F
F
F
N
N
F
F
N
F
F
F
F
N
F
F
F
F
ALL ON
Fault Exists Prior to
Turn-on
Action After TSTRIKE
FAIL SIGNAL
Fault Occurs During
Ignition
Action After TSTRIKE
Fault Occurs During
Run Mode
Action After TD_FLT
With Exception of
Affected Lamps for
‘O, S1, S2’ Fault
Conditions, All
Unaffected Lamps
Are ON, Including
Affected Lamp in a
Single S3 Fault
Condition.
Open Drain to LOW
Open Drain to LOW
Open Drain to LOW
WWW . Microsemi .C OM
STAYLIT FUNCTION TABLE
An S1 Fault Will
Typically Reduce
Opposing
Operational Lamp
Current By 43%
ALL OFF
VIN
ENABLE
FAIL
TPWR_ON
Copyright © 2010
Rev. 1.0, 2010-10-13
LXMG1645-24-53
TSTRIKE
TD_FLT
FAIL OCCUR
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
RangeMax™ StayLIT™
®
TM
LXMG1645-24-53
24V Quad 5W CCFL Inverter Module
P RODUCTION D ATA S HEET
MECHANICAL DIMENSIONS
7.874 in.
185mm
10.00
5.00
GROUNDED MOUNTING HOLE 3.06MM ±.08 DIA.
6MM HEAD CLEARANCE 4 HOLES
7.283 in.
77.5mm
3.051 in.
5.00
CN1
CN4
CN3
MOUNTING
HOLE
3.06MM
±.08 DIA.
X1
50mm ±0.5
CN2
1.969in.
CN5
MICROSEMI
5.00
190mm
7.480 in.
1.6mm ± 0.1
11.8mm Max
5.00
Warning
High Voltage is
present at high side
of each transformer,
its core and the high
side of the output
connector pins,
please provide at
least 3 mm clearance
(in all directions) on
the component side
of the board to any
conductor when
mounting
WWW . Microsemi .C OM
200mm ±0.5
0.063 in.
0.465in.
weight: 65g typ.
PCB tolerances ± 0.2mm, unless otherwise noted , 4-40 recommended mounting screws
LXMG1645-24-53
Copyright © 2010
Rev. 1.0, 2010-10-13
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6
RangeMax™ StayLIT™
TM
®
LXMG1645-24-53
24V Quad 5W CCFL Inverter Module
P RODUCTION D ATA S HEET
WWW . Microsemi .C OM
NOTES
LXMG1645-24-53
PRODUCTION DATA – Information contained in this document is proprietary to
Microsemi and is current as of publication date. This document may not be modified in
any way without the express written consent of Microsemi. Product processing does not
necessarily include testing of all parameters. Microsemi reserves the right to change the
configuration and performance of the product and to discontinue product at any time.
Copyright © 2010
Rev. 1.0, 2010-10-13
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7