LXMG1612-05-01 [MICROSEMI]
5V Highly-Integrated, Digital Dimming CCFL Inverter Module; 5V高度集成的数字调光CCFL逆变器模块型号: | LXMG1612-05-01 |
厂家: | Microsemi |
描述: | 5V Highly-Integrated, Digital Dimming CCFL Inverter Module |
文件: | 总6页 (文件大小:134K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
LXMG1612-05-xx
®
5V Highly-Integrated, Digital Dimming CCFL Inverter Module
PRODUCTION DATASHEET
TM
KEY FEATURES
DESCRIPTION
RangeMAX Wide Range Dimming,
Input Voltage Range: The modules
RangeMAX Wide Range
Dimming
Single
LXMG1612-05-xx series of Direct battery or AC adapter directly to high-
Drive™ CCFL (Cold Cathode frequency, high-voltage waves required
Fluorescent Lamp) Inverter Modules are to ignite and operate CCFL lamps.
specifically designed for driving LCD 12V input inverter is also available
Output
Inverter.
The convert DC voltage from the system
Single 5V Input Voltage
Fully Integrated Direct Drive
And Dimming Control
Single Sided PCB Layout
Easy To Use Brightness
Control
A
backlight lamps.
RangeMAX
(LXMG1612-12-xx)
Digital
Dimming
Direct Drive Technology: The module
MicroAmp
Mode
SLEEP
Technique. Digital Dimming provides design is based on a new Direct Drive
flicker-free brightness control in any topology, which provides a number of
wide-range dimming application.
Output Short-Circuit
Protection And Automatic
Strike-Voltage Regulation
Fixed Frequency Operation
UL 60950 E175910
RoHS Compliant
cost and performance ad-vantages.
The modules are equipped with a
Additional Feature: Other benefits of
dimming input that permits brightness this new topology are fixed-frequency
control from an external potentiometer, operation and secondary-side strike-
DC voltage source, or PWM signal. The voltage regulation and all LXMG1612-
resultant “burst drive” that energizes the 05-xx modules feature both open and
lamp was designed specifically to ensure shorted lamp protection.
that no premature lamp degradation
APPLICATIONS
Notebook And Sub-Notebook
Computers
occurs.
Portable Instrumentation
Desktop Displays
Low Ambient Light
Conditions (i.e. Aircraft
Cabins, Automobile)
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; Patents Pending
PRODUCT HIGHLIGHT
BENEFITS
Smooth, Flicker Free 1-100%
Full-Range Brightness
Control Gives Your Product
A High Quality Image
Output Open Circuit Voltage
Regulation Minimizes Corona
Discharge For Long Life And
High Reliability
Power Efficient. “Low
Brightness” Capability Allows
For Advanced Power
DC Voltage
Source
PWM
Signal
Potentiometer
BRITE
W
Microsemi
Management
UNIVERSAL DIMMING INPUT
"PWM", VDC, OR POTENTIOMETER
PACKAGE ORDER INFO
INVERTER MATES DIRECTLY TO
PANEL CONNECTORS
BHR-03VS-1
PART NUMBER
OUTPUT CONNECTOR
LXMG1612-05-01 JST SM02(8.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-05A00
LXMG1612-05-02
LXMG1612-05-03
JST SM02B-BHSS-1-TB(LF)(SN) or Yeon Ho 35001WR-02A00
Honda QZ-19-A3MYL #02
BHSR-02VS-1
Honda QZ-19-3F01
Copyright © 2000
Rev. 1.1, 2006-09-05
Microsemi
Page 1
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXMG1612-05-xx
®
5V Highly-Integrated, Digital Dimming CCFL Inverter Module
PRODUCTION DATASHEET
TM
ABSOLUTE MAXIMUM RATINGS (NOTE 1)
Input Signal Voltage (VIN1)................................................................................................................................ -0.3V to 6.5V
Output Voltage, no load .........................................................................................................Internally Limited to 1800VRMS
Output Current ........................................................................................................................ 8.0mARMS (Internally Limited)
Output Power .................................................................................................................................................................. 6.0W
Input Signal Voltage (BRITE Input).........................................................................................................-0.3V to VIN1+0.3V
Input Signal Voltage (
, VSYNC Inputs)............................................................................................-0.3V to VIN1+0.3V
SLEEP
Ambient Operating Temperature, zero airflow .....................................................................................................0°C to 70°C
Storage Temperature Range.............................................................................................................................. -40°C to 85°C
Note 1: 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.
FUNCTIONAL PIN DESCRIPTION
CONN
PIN
DESCRIPTION
CN1 (Molex 53261-0871) Mates with 51021-0800 housing, 50079-8100 pins
CN1-1
VIN1
Main Input Power Supply (4.5V < VIN1 < 5.5V
Power Supply Return
CN1-2
CN1-3
CN1-4
CN1-5
CN1-6
CN1-7
CN1-8
GND
ON/OFF Control. (2.1V <
< V = ON, 0V <
< 0.8V = OFF,
Floating = OFF)
SLEEP
SLEEP
BRITE
SLEEP
SLEEP
IN1
Brightness Control (0.0V to 2.5VDC). 2.5VDC gives maximum lamp current.
BRITE RTN Analog Ground. Use for BRITE signal return ONLY.
VSYNC Vertical Synchronization Input. 2.5 to 5.0V Logic Level. (20Hz < fSYNC < 200Hz)
CN2 for LXMG1612-05-01 and -02 (JST SM02(8.0)B-BHS-1-TB (LF)(SN) | Yeon Ho 20015WR-05A00 or SM02B-BHSS-1-TB
(LF)(SN) | Yeon Ho 35001WR-02A00)
High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length.
DO NOT connect to Ground.
CN2-1
CN2-2
VHI
Connection to low side of lamp. Connect to lamp terminal with longer lead length.
DO NOT connect to Ground
VLO
CN2 for LXMG1612-05-03 (Honda QZ-19-A3MYL#02)
High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length.
DO NOT connect to Ground.
CN2-3
CN2-1
VHI
Connection to low side of lamp. Connect to lamp terminal with longer lead length.
DO NOT connect to Ground
VLO
PHYSICAL DIMENSIONS
LXMG1612-05-XX
4.96in.
126mm
MOUNTINGHOLE
3.0mm DIA. ± .08DIA
X
CN1
0.13in.
0.63in.
16mm
CN2
0.5in.
12.7mm
3.3mm
W
GROUNDEDMOUNTINGHOLE
3.0mmDIA. ± .08DIA
3.64in.
92.5mm
0.66in.
16.75mm
0.06in.
1.52mm
Warning
High Voltage Present at all
Output Connectors
0.315in.
8.0mm
PCB tolerances ± 0.5mm
Weight: 12.5 (g) typ.
Copyright © 2000
Rev. 1.1, 2006-09-05
Microsemi
Page 2
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXMG1612-05-xx
®
5V Highly-Integrated, Digital Dimming CCFL Inverter Module
PRODUCTION DATASHEET
TM
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, will not function optimally.
Recommended Operating Conditions
Parameter
Symbol
Units
Min
R.C.
Max
Input Supply Voltage Range (Fully Regulated
Lamp Current)
4.5
5
5.5
VIN1
V
Input Supply Voltage Range (Functional)
Output Power
Brightness Control Input Voltage Range
Lamp Operating Voltage
Lamp Current (Full Brightness)
Operating Ambient Temperature Range
4.35
5
5.65
4.0
VIN
PO
VBRT_ADJ
VLAMP
IOLAMP
TA
3.5
2.5
535
5.8
W
V
VRMS
mARMS
°C
0.0
450
620
0
70
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of
25°C except where otherwise noted.
LXMG1612-05-xx
Parameter
Symbol
Test Conditions
Units
Min
Typ
Max
OUTPUT PIN CHARACTERISTICS
`
VBRT_ADJ=2.5VDC
Burst Duty=100%, VIN1=5VDC
,
=HIGH,
SLEEP
Full Bright Lamp Current
IL(MAX)
IL(MIN)
5.2
5.8
6.4
mARMS
mARMS
VBRT_ADJ=0VDC
VIN1=5VDC
,
=HIGH, Burst Duty=2.0%,
SLEEP
Min. Average Lamp Current
(Note 2)
0.12
Lamp Start Voltage
Operating Frequency
BRITE INPUT
VLS
fO
0°C <TA < 70°C, VIN1 > 5.0VDC
BRT_ADJ=2.5VDC =HIGH, VIN1=5.0V
1500
63
1650
68
1800
73
VRMS
kHz
V
,
SLEEP
`
`
`
`
VBRT_ADJ=0VDC
-685
-260
2.30
0.0
-728
-282
2.35
-775
-305
2.40
µADC
µADC
VDC
Input Current
IBRT
VBRT_ADJ=2.5VDC
Input Voltage for Max. Lamp Current
Input Voltage for Min. Lamp Current
VBRT_ADJ IO(LAMP)=100% Duty Cycle
VBRT_ADJ IO(LAMP)= Minimum Duty Cycle
VDC
INPUT
SLEEP
VSLEEP(HI)
VSLEEP(LO)
RUN Mode
VIN1=4.5V
VIN1=5.5V
1.9
-5.0
390
0.0
2.1
1.9
410
0.0
VIN1
2.0
435
0.0
VDC
VDC
Mode
SLEEP
=5.0V
SLEEP
µADC
µADC
Input Current
ISLEEP
=0V
SLEEP
VSYNC CHARACTERISTICS
VSYNCH(HI) VIN1=4.5V
1.50
-3.0
25
2.5
0.0
27
5.0
1.2
29
VDC
VDC
KΩ
Hz
Logic High Level
VSYNCH(LO) VIN1=5.5V
Input Impedance
ZIN
Input Frequency
fSYNC
20
200
POWER CHARACTERISTICS
Sleep Current
VIN1=5VDC
,
=0.0V
SLEEP
IIN(MIN)
0.0
0.5
10
µADC
Note 2: Minimum lamp current required to maintain even light output may vary with display panel.
Average RMS current = (Burst Duty Cycle) x (Burst amplitude of 5.8mARMS)
Copyright © 2000
Rev. 1.1, 2006-09-05
Microsemi
Page 3
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXMG1612-05-xx
®
5V Highly-Integrated, Digital Dimming CCFL Inverter Module
PRODUCTION DATASHEET
TM
HOW RANGEMAX WORKS
LAMP VOLTAGE & LAMP CURRENT – Burst Mode Operation
Figure 2 – 2% Burst Duty Cycle
Figure 1 – 50% Burst Duty Cycle
Rather than using the traditional dimming technique of varying
lamp current magnitude to adjust light output, RangeMAX
inverters use a fixed lamp current value with a duty cycle control
method.
The lamp current burst width can be modulated from 100%
(continuous lamp current) down to a 2% duty cycle, allowing the
lamp to be dimmed to less than 1% of its full brightness.
As can be seen in Trace 4 of Figure 3 photo at right, careful
design consideration was given to controlling lamp start voltage
to softly start current flow. This eliminates current overshoot that
can result in premature cathode wear and reduce lamp life.
Figure 3 – 2% Burst Duty Cycle (Expanded Time Base)
High Voltage
Transformer
VHI
Comparator
VBRITE
+
Transformer
0.25 -
Ramp
2.5V DC
Driver
-
Ramp Gen
VSENSE
VSYNC
ISENSE
VLO
Figure 4 – RangeMAX Block Diagram
Copyright © 2000
Rev. 1.1, 2006-09-05
Microsemi
Page 4
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXMG1612-05-xx
®
5V Highly-Integrated, Digital Dimming CCFL Inverter Module
PRODUCTION DATASHEET
TM
HOW RANGEMAX WORKS (CONTINUED)
Highlights
Integrated brightness control circuit includes a DC voltage
In applications with no access to a vertical sync., an onboard
to pulse width converter that minimizes system design
work and system noise susceptibility. This provides a
familiar and convenient interface while reducing the
potential for externally induced noise, which can cause
lamp flicker.
oscillator operates the inverter burst rate at about 250Hz. In
this non-synchronous mode, minor display disturbances can
be found under certain video conditions. This performance
may be acceptable for many applications, but
synchronization must be used when no disturbance can be
tolerated.
RangeMAX inverter modules are designed to operate with
the burst frequency synchronized to the video frame rate.
This provides operation with no visible display
disturbances caused by beat frequencies between the lamps
and video frame rates. In this synchronous mode, the
inverter burst rate operates at twice the video refresh rate,
well beyond standard 50/60Hz video refresh rates where
the eye can perceive pulsing light.
A single input will accommodate negative and positive
vertical sync pulses at any pulse width.
Separate feedback loops for lamp current and open circuit
voltage regulation insure reliable strike under all operating
conditions, automatic over-voltage prevention with broken
or failed lamps, and accurate lamp current regulation.
TYPICAL APPLICATION
5V
The brightness control may be a voltage output DAC, digital
DAC or
Pot
VIN1
resistor or a simple 10k potentiometer. If desired, an
additional series resistor with the 10k potentiometer can be
used to set a higher minimum brightness setting as shown in
Figure 5. A 2.5V to 5V Logic Level PWM signal from a
micro-controller may also be used as shown in Figure 5A.
BRITE
VHI
10k
CCFL
TUBE
LXMG1612-05-xx
R
BRITE RTN
VSYNC
SLEEP
VLO
GND
5V
If synchronization to the video frame rate is desired, connect
the vertical sync pulse from the system video controller to
the VSYNC input. If no video synchronization is desired,
connect VSYNC to ground.
0V
VSYNC
Figure 5 - Potentiometer Brightness Control
If you need to turn the inverter ON/OFF remotely, connect
PWM Signal
from System
BRITE
to 2.5V to 5V logic signal to the
input.
SLEEP
P.W.
Connect VHI to high voltage wire from the lamp. Connect
VLO to the low voltage wire (wire with thinner insulation).
Never connect VLO to circuit ground as this will defeat lamp
current regulation. If both lamp wires have heavy high
LXMG1612-05-xx
2ms
0 < P.W. < 100% of period
voltage insulation, connect the longest wire to VLO
.
This
Figure 5A - PWM Brightness Control
wire is typically white.
LXMG1612-05-XX OUTPUT CURRENT ADJUST
The LXMG1612-05 output current can be adjusted by changing the
value of two resistors on the PCB. The following table shows the
approximate new output current values:
R30
R33
R34
R4
C3
R3
R7
R15
C9
U4
C11
C15
R12
R14
C16
C2
R21
C4
R2
C5
C6
C7
C12
R11
C14
C13
Output Current
7.0mA
R12
R16
R20
R41
2.00K 1%
2.61K 1%
2.74K 1%
2.74K 1%
2.74K 1%
2.74K 1%
Not Used
Not Used
Not Used
499K 1%
178K 1%
78.7K 1%
U1
C8
R5
R6
C21
6.0mA
5.8mA
C10
R38
R39
R16
R10
R13
5.0mA
4.0mA
3.0mA
Figure 6- Component Replacement Locations
Copyright © 2000
Rev. 1.1, 2006-09-05
Microsemi
Page 5
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXMG1612-05-xx
®
5V Highly-Integrated, Digital Dimming CCFL Inverter Module
PRODUCTION DATASHEET
TM
NOTES
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 © 2000
Rev. 1.1, 2006-09-05
Microsemi
Integrated Products
Page 6
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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