RangeMAX™
TM
®
LXMG1615-03-xx
3.6/5V 2W, D
IGITAL
D
IMMING
CCFL I
NVERTER
M
ODULE
P
RODUCTION
D
ATA
S
HEET
DESCRIPTION
KEY FEATURES
RangeMAX Wide Range
Dimming
V
BATT
– Single Li-Ion Cell
Operation Or Fixed 5V
Easy to Use Brightness Control
Output Short-Circuit Protection
and Automatic Strike-Voltage
Regulation
Fixed Frequency Operation
RoHS Compliant
WWW .
Microsemi
.C
OM
RangeMAX™ Wide Range Dimming,
Single Output Inverter.
The LXMG1615
series of Direct Drive CCFL (Cold
Cathode Fluorescent Lamp) Inverter
Modules are specifically designed for
driving 8.4” and smaller LCD backlight
lamps. They also target portable displays
that rely on a single lithium-ion battery.
LXMG1615 modules provide the
designer with a vastly superior display
brightness range. This brightness range is
achievable with virtually any LCD
display.
RangeMAX™ Digital Dimming
Technique.
Digital dimming provides
flicker-free brightness control in any wide
range (100:1+) dimming application.
The modules are available with a
dimming input that permits brightness
control from either a DC voltage source or
a PWM signal.
The resultant “burst drive” that
energizes the lamp was designed
specifically to ensure that no premature
lamp degradation occurs (See the “How
RangeMAX Works” section).
V
BATT
Voltage Range.
The modules
convert the DC voltage from a single li-
ion battery (3.2-4.2V) or a fixed 5V
supply directly to high-frequency, high-
voltage waves required to ignite and
operate CCFL lamps.
Direct Drive Technology.
The
modules design is based on a new Direct
Drive topology, which provides a number
of cost and performance advantages.
Additional Features.
Other benefits
of this new topology are fixed-frequency
operation, secondary-side strike-voltage
regulation and both open and shorted lamp
protection.
APPLICATIONS
PDA And Sub-Notebook
Computers
Portable Instrumentation
Target 8.4” And Smaller Panels
BENEFITS
Smooth, Flicker Free 1-100%
Full-Range Brightness Control
Output Open Circuit Voltage
Regulation Minimizes Corona
Discharge For High Reliability
Power Efficient, “Low
Brightness” Capability Allows
For Advanced Power
Management
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
PDAs, Digital Cameras,
Video Camcorder,
Instrumentation, Handheld GPS
3.2 - 4.2V
Li-Ion Battery
V
BATT
F
OR
L
OWER
V
OLTAGE
L
AMPS
LXMG1615
F
OR
H
IGHER
V
OLTAGE
L
AMPS
ONE INVERTER SUPPORTS EITHER VOLTAGE RANGE
CCFL
260 - 380V
RMS
V
LAMP
Instrumentation, Sub Notebooks,
Digital Picture Frames
4.5 - 5.5V
CCFL
LXMG1615-03-
XX
LXMG1615-03-
XX
350 - 515V
RMS
MODULE ORDER INFO
P
ART
N
UMBER
LXMG1615-03-01
LXMG1615-03-02
LXMG1615-03-03
O
UTPUT
C
ONNECTOR
JST SM02(8.0)B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-05A00
JST SM02B-BHSS-1-TB(LF)(SN) or Yeon Ho 35001WR-02A00
Honda QZ-19-A3MYL #02
I
NVERTER
M
ATES
D
IRECTLY TO
P
ANEL
C
ONNECTORS
BHR-03VS-1
BHSR-02VS-1
Honda QZ-19-3F01
Copyright
©
2000
Rev. 1.0, 2006-03-23
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
RangeMAX™
TM
®
LXMG1615-03-xx
3.6/5V 2W, D
IGITAL
D
IMMING
CCFL I
NVERTER
M
ODULE
P
RODUCTION
D
ATA
S
HEET
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage (V
BATT
) .............................................................................................................................. -0.3V to 6.5V
Input Supply Voltage 3.3V (+3.3) ....................................................................................................................... -0.3V to 5.5V
Output Voltage, no load........................................................................................................... Internally Limited to 1800V
RMS
Output Current ..........................................................................................................................4.5mA
RMS
(Internally Limited)
Output Power ................................................................................................................................................................. 2.1W
Input Signal Voltage (BRITE Input) ..........................................................................................................-0.3V to 3.3V +0.3V
Input Signal Voltage (SYNC)....................................................................................................................-0.3V to 3.3V +0.3V
Ambient Operating Temperature, zero airflow...................................................................................................... 0°C to 70°C
Storage Temperature Range.............................................................................................................................-40°C to 85°C
Note:
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.
WWW .
Microsemi
.C
OM
RECOMMENDED OPERATING CONDITIONS
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.
Parameter
Input Supply Voltage (+3.3V)
V
BATT
Voltage Range (V
BATT
= 3.6V)
V
BATT
Voltage Range (V
BATT
= 5.0V)
Output Power (V
BATT
= 3.6V)
Output Power (V
BATT
= 5.0V)
Brightness Control Input Voltage Range
Lamp Operating Voltage (V
BATT
= 3.6V)
Lamp Operating Voltage (V
BATT
= 5.0V)
Lamp Current (Full Brightness)
Operating Ambient Temperature Range
Symbol
+3.3
V
BATT
V
BATT
P
O
P
O
V
BRT_ADJ
V
LAMP
V
LAMP
I
OLAMP
T
A
Recommended Operating Conditions
Min
R.C.
Max
3.1
3.2
4.5
1
1.5
0.0
260
350
0
3.3
3.6
5.0
1.2
1.7
305
445
4.0
3.5
4.2
5.5
1.5
2
2.2
380
515
70
Units
V
V
V
W
W
V
V
RMS
V
RMS
mA
RMS
°C
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the recommended operating conditions and 25°C ambient temperature for the LXMG1615-03-xx.
Parameter
OUTPUT PIN CHARACTERISTICS
Full Bright Lamp Current
Min. Average Lamp Current (Note 2)
Lamp Start Voltage
Operating Frequency
BRITE INPUT
Linear Dim Control Range
Input Current
Input Voltage for Max. Lamp Current
Input Voltage for Min. Lamp Current
+3.3V
RUN Mode
OFF Mode
Input Current
VSYNC CHARACTERISTICS
Logic High Threshold
Logic Low Threshold
Input Impedance
Input Frequency
Free Run Frequency
Copyright
©
2000
Rev. 1.0, 2006-03-23
Symbol
I
L(MAX)
I
L(MIN)
V
LS
F
O
V
BRT
I
BRT
V
BRT_ADJ
V
BRT_ADJ
ENABLE
DISABLE
IIN
RUN
IIN
PK
V
SYNC (HI)
V
SYNC (LO)
Z
IN
FV
SYNC
F
BURST
Test Conditions
V
BRT_ADJ
= 0V, V
BATT
= 3.6V or 5V
V
BRT_ADJ
= 2.2V
DC
, V
BATT
= 3.6V or 5V
V
BATT
=3.2 –4.2V or 4.5V to 5.5V
V
BRT_ADJ
= 0VDC
LXMG1615-03-xx
Min
Typ Max
3.5
1250
80
.25
-21
250
0
2.2
3.1
-0.3
4.0
.08
1400
90
4.5
1800
100
2.2
-41
290
.25
2.5
3.5
2.7
20
Units
mA
RMS
mA
RMS
V
RMS
KHz
V
DC
µA
DC
µA
DC
V
DC
V
DC
V
DC
V
DC
mA
V
DC
V
DC
KΩ
Hz
Hz
Page 2
V
BRT_ADJ
= 0V
DC
V
BRT_ADJ
= 2.5V
DC
I
O(LAMP)
= 100% Duty Cycle
I
O(LAMP)
= Minimum Duty Cycle
+3.3V = High
+3.3V = Low
+3.3V ± 5%
+3.3V = 3.3V ± 5%
+3.3V = 3.3V ± 5%
-27
268
E
LECTRICALS
E
LECTRICALS
3.3
0.0
10
100
2.2
.8
10
45
400
530
Output Burst Rate; V
SYNC
=0V
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
RangeMAX™
TM
®
LXMG1615-03-xx
3.6/5V 2W, D
IGITAL
D
IMMING
CCFL I
NVERTER
M
ODULE
P
RODUCTION
D
ATA
S
HEET
ELECTRICAL CHARACTERISTICS (CONTINUED)
Unless otherwise specified, these specifications apply over the recommended operating conditions and 25°C ambient temperature for the LXMG1615-03-xx.
WWW .
Microsemi
.C
OM
Parameter
POWER CHARACTERISTICS
Run Current
V
BATT
= 3.6V
DC
Run Current
V
BATT
= 5.0V
DC
Symbol
Test Conditions
V
BRT_ADJ
= 0V, V
LAMP
= 270V
RMS
V
BRT_ADJ
= 0V, V
LAMP
= 420V
RMS
LXMG1615-03-xx
Min
Typ Max
360
405
Units
mA
mA
Note 2: Minimum lamp current required to maintain even light output may vary with display panel.
Average RMS current
=
(burst duty cycle)
×
(burst amplitude of 4.0mA
RMS
)
FUNCTIONAL PIN DESCRIPTION
Conn.
Pin
Description
CN1
(Molex 53261-0571)*
CN1-1
V
BATT
Main Input Power Supply (3.1V to 5.5V)
CN1-2
GND
Power Supply Return
CN1-3
+3.3V
+3.3V Logic Input
CN1-4
BRITE Brightness Control (0.25- 2.2VDC) 0.25VDC gives maximum lamp current
CN1-5
V
SYNC
Vertical Synchronization Input 3.3V Logic Level (45 < f
SYNC
< 400Hz)
CN2 for LXMG1615-03-01,-02
(
JST SM02(8.0)B-BHS-1-TB (LF)(SN) | Yeon Ho 20015WR-05A00, 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.
CN2-1
V
HI
DO NOT
connect to Ground.
Connection to Low Side of Lamp. Connect to lamp terminal with longer lead length.
CN2-2
V
LO
DO NOT
connect to Ground.
CN2 for LXMG1615-03-03
(Honda QZ-19-A3MYL#02)
High Voltage Connection to High Side of Lamp. Connect to lamp terminal with shortest lead length.
CN2-3
V
HI
DO NOT
connect to Ground.
Connection to Lower Side of Lamp. Connect to lamp terminal with longer lead length.
CN2-1
V
LO
DO NOT
connect to Ground.
* LX9506G Mating Connector Assembly Available
PHYSICAL DIMENSIONS
94mm
3.70in
CN1
2.5mm
0.0984in.
15mm
0.591in.
12.5mm
0.492in
CN2
P
ACKAGE
D
ATA
P
ACKAGE
D
ATA
10mm
0.394in.
G
ROUNDED
M
OUNTING
H
OLE 3.18MM ±0.08
DIA
.
69mm ±0.2mm
2.71in.
1.0mm
0.0394in.
4.6mm Max
0.181in.
Warning
R1.0
PCB tolerances ± 0.5mm, M2 or 2-56 recommended mounting screws
High Voltage Present at
high side of transformer
Weight: (5.5g) typ
.
and Output Connector
Copyright
©
2000
Rev. 1.0, 2006-03-23
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
RangeMAX™
TM
®
LXMG1615-03-xx
3.6/5V 2W, D
IGITAL
D
IMMING
CCFL I
NVERTER
M
ODULE
P
RODUCTION
D
ATA
S
HEET
HOW THE RANGEMAX WORKS
LAMP VOLTAGE & LAMP CURRENT –
BURST MODE OPERATION
WWW .
Microsemi
.C
OM
Figure 1
– 50% Burst Duty Cycle
Figure 2
– 2% 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)
HIGHLIGHTS
•
Comparator
V
BRITE
Ramp
.25 -
2.2V
DC
+
-
Ramp Gen.
I
SENSE
V
SENSE
Transformer
Driver
High Voltage
Transformer
V
HI
V
LO
Figure 4
– RangeMAX Simplified Block Diagram
Integrated brightness control circuit includes a DC
voltage 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.
•
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.
•
In applications with no access to a vertical sync, an
onboard oscillator operates the inverter burst rate at about
500Hz. 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.
Page 4
LAMP
D
ESCRIPTION
D
ESCRIPTION
Copyright
©
2000
Rev. 1.0, 2006-03-23
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
RangeMAX™
TM
®
LXMG1615-03-xx
3.6/5V 2W, D
IGITAL
D
IMMING
CCFL I
NVERTER
M
ODULE
P
RODUCTION
D
ATA
S
HEET
HOW THE RANGEMAX WORKS (CONTINUED)
HIGHLIGHTS (CONTINUED)
WWW .
Microsemi
.C
OM
•
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.
•
A single input will accommodate negative and positive
vertical sync pulses at any pulse width.
TYPICAL APPLICATION
3.2V - 4.2V
or 5V
3.3V
DC
BRITE
+3.3V
V
BATT
V
HI
CCFL
TUBE
V
LO
•
LXMG1615-03-xx
SYNC
V
SYNC
GND
Figure 5
- Brightness Control
PWM Signal
from System
P.W.
< 200µS
0 < P.W. < 100% of period
The Brightness control may be a voltage output DAC, or
other voltage source as shown in Figure 5. A 3.3V Logic
Level PWM signal from a micro-controller may also be
used as shown in Figure 5A.
•
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.
•
If you need to turn the inverter ON/OFF remotely, use the
+3.3V Logic Supply pin.
•
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 voltage insulation, connect the longest
wire to VLO. This wire is typically white.
RangeMAX INVERTERS
BRITE
LXMG1615-03
Figure 5A
- PWM Brightness Control
Also available in higher power single lamp inverters
LXMG1612-xx-xx, Dual Output LXMG1621-01,
LXMG1622-xx-xx and Quad Output LXMG1641-01
versions for multiple lamp applications.
LXMG1615-03-XX OUTPUT CURRENT ADJUST
C1
C3
The LXMG1615-03-xx output current can be adjusted
lower by changing the value of one resistor (R10) on the
PCB. The following table shows the new output current
values:
4.0mArms
3.5mArms
3.0mArms
2.5mArms
2.0mArms
137K 1% (stock setting)
95.3K1%
68.1K1%
49.9K1%
36.5K1%
CN1
R1
R2
R3
R4
C9
C11
C5
F1
C12
C4
D1
C13
C14
C6
A
PPLICATION
A
PPLICATION
R22
R18
R5
R7
C7
R6
C8
C10
R8
U1
C15
C16
C17
R11
R9
R10
R19
Copyright
©
2000
Rev. 1.0, 2006-03-23
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
京公网安备 11010802033920号
EEWORLD
