MICROSEMI LXM1617-03-21

PanelMatch™
I N T E G R A T E D
LXM1617-03-2x
3.3V 2.2W CCFL Programmable Inverter Module
P R O D U C T S
P RODUCTION D ATASHEET
KEY FEATURES
DESCRIPTION
The resultant “burst drive” that
energizes the lamp was designed
specifically to ensure that no premature
lamp degradation occurs, while allowing
significant power savings at lower dim
levels.
The modules convert DC voltage from
the system battery or AC adapter directly
to high frequency, high-voltage waves
required to ignite and operate CCFL
lamps. A 5V input inverter is also
available (LXM1617-05-2x).
The modules design is based on
Microsemi’s new LX1689 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,
secondary-side strike-voltage regulation
and both open/shorted lamp protection
with fault timeout.
ƒ Externally Programmable
Maximum Output Current
ƒ Easy to Use Brightness
Control
ƒ Output Short-Circuit Protection
and Automatic Strike-Voltage
ƒ RangeMAX Wide Range
Dimming
ƒ Regulation and Timeout Rated
From -20 to 70°C
ƒ UL60950 E175910
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The LXM1617-03-2x is a Single
Output 2.2W Direct Drive™ CCFL (Cold
Cathode Fluorescent Lamp) Inverter
Module specifically designed for driving
LCD backlight lamps. It is ideal for
driving typical 3.9” to 6.4” TFT panels.
LXM1617 modules provide the
designer with a vastly superior display
brightness range. This brightness range is
achievable with virtually any LCD display.
The maximum output current is
externally programmable over a range of
3.5 to 5mA in 0.5mA steps to allow the
inverter to properly match to a wide array
of LCD panel lamp current specifications.
The modules include a dimming input that
permits brightness control from a dc
voltage source, a PWM signal or an
external potentiometer.
RangeMAX
Digital
Dimming
Technique provides flicker-free brightness
control in any wide range typically (50:1+)
dimming application.
APPLICATIONS
ƒ PDA’s
ƒ Portable Instrumentation
ƒ Industrial Display Controls
BENEFITS
ƒ Smooth, Flicker Free 2%100% Full-Range Brightness
Control
ƒ Programmable output current
allows inverter to mate with a
wide variety of LCD panel’s
specifications
ƒ Output Open Circuit Voltage
Regulation Minimizes Corona
Discharge For High Reliability
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
U N IV E R S A L D IM M IN G IN P U T
"P W M ", V
Potentiom eter
,
OR
P O T E N T IO M
ETER
PW M
Signal
1
S ELECTABLE M
A X IM U M
3 .5 M A
TO
O
UPUT
5MA
C
W
URRENT
RMS
PACKAGE ORDER INFO
PART NUMBER
OUTPUT CONNECTOR
LXM1617-03-21
LXM1617-03-22
LXM1617-03-23
JST SM02(8.0)B-BHS-1-TB or Yeon Ho 20015WR-05A00
JST SM02B-BHSS-1-TB or Yeon Ho 35001WR-02A00
Honda QZ-19-A3MYL #02
Copyright © 2002
Rev. 1.0b, 2005-01-14
INVERTER MATES DIRECTLY
TO PANEL CONNECTORS
JST BHR-03VS-1
JST BHSR-02VS-1
HONDA QZ-19-3F01
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
LXM1617-03-2X
2
3
DC Voltage
Source
DC
PanelMatch™
I N T E G R A T E D
LXM1617-03-2x
3.3V 2.2W CCFL Programmable Inverter Module
P R O D U C T S
P RODUCTION D ATASHEET
Input Signal Voltage (VIN1).......................................................................................................................................-0.3V to 5V
Input Power ...................................................................................................................................................................... 3.0W
Output Voltage, no load ............................................................................................................ Internally Limited to 1300VRMS
Output Current ...............................................................................................................................6mARMS (Internally Limited)
Output Power ................................................................................................................................................................... 2.3W
Input Signal Voltage ( SLEEP Input) .......................................................................................................................-0.3V to 5V
Input Signal Voltage (BRITE) ..................................................................................................................................-0.3V to 5V
Ambient Operating Temperature, zero airflow.....................................................................................................-20°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.
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ABSOLUTE MAXIMUM RATINGS (NOTE 1)
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.
Parameter
Symbol
Input Supply Voltage Range (Fully Regulated
Lamp Current)
Input Supply Voltage Range (Functional)
Output Power
Linear BRITE Control Input Voltage Range
Lamp Operating Voltage
Lamp Current (Full Brightness)
Operating Ambient Temperature Range
Recommended Operating Conditions
Min
R.C.
Max
3
VIN1
3.3
3.6
2.9
PO
VBRT_ADJ
VLAMP
IOLAMP
TA
0.5
325
3.5
-20
Units
V
4.2
2.2
2.0
435*
5†
70
380
W
V
VRMS
mARMS
°C
*Total output power must not exceed 2.2W . Higher voltage lamps may require maximum output current to be set lower than 5mARMS
†At input voltages below 3.6V the inverter may not be able to output the full 5mARMS in all configurations.
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of
25°C except where otherwise noted.
Parameter
`
Symbol
Test Conditions
LXM1617-03-2x
Min
Typ
Max
Units
OUTPUT PIN CHARACTERISTICS
IL(MAX)
Full Bright Lamp Current
IL(MAX)
Full Bright Lamp Current
IL(MAX)
Full Bright Lamp Current
IL(MAX)
Min. Average Lamp Current
Lamp Start Voltage
Operating Frequency
Burst Frequency
Copyright © 2002
Rev. 1.0b, 2005-01-14
IL(MIN)
VLS
fO
fBURST
VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 3.3VDC
ISET1 = Ground, ISET2 = Ground
VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 3.3VDC
ISET1 = Ground, ISET2 = Open
VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 3.3VDC
ISET1 = Open, ISET2 = Ground
VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 3.3VDC
ISET1 = Open, ISET2 = Open
VBRT_ADJ ≤0.5VDC, SLEEP > 2.0V, VIN1 = 3.3VDC
ISET1 = ISET2 = Ground
-20°C < TA < 70°C, VIN1 > 3.15VDC
VBRT_ADJ = 2.5VDC, SLEEP > 2.0V, VIN1 = 3.3V
Output Burst Frequency
3.0
3.5
4.0
mARMS
3.5
4.0
4.5
mARMS
4.0
4.5
5.0
mARMS
4.5
5
5.5
mARMS
0.21
mARMS
1000
1100
85
89
94
kHz
166
174
184
Hz
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
VRMS
Page 2
ELECTRICALS
Full Bright Lamp Current
PanelMatch™
I N T E G R A T E D
P R O D U C T S
LXM1617-03-2x
3.3V 2.2W CCFL Programmable Inverter Module
P RODUCTION D ATASHEET
Parameter
`
Symbol
`
`
LXM1617-03-2x
Min
Typ
Max
Units
-300
50
µADC
µADC
BRITE INPUT
Input Current
`
Test Conditions
IBRT
VBRT_ADJ = 0VDC
VBRT_ADJ = 3VDC
Minimum Input for Max. Lamp Current
VBRT_ADJ
IO(LAMP) = Maximum Lamp Current
Maximum Input for Min. Lamp Current
VBRT_ADJ
IO(LAMP) = Minimum Lamp Current
2.0
0.4
2.05
0.5
VDC
VDC
SLEEP INPUT
RUN Mode
VSLEEP
2.0
VIN1
VDC
SLEEP Mode
VSLEEP
-0.3
0.8
VDC
0.4
V
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ELECTRICAL CHARACTERISTICS (CONTINUED)
Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of
25°C except where otherwise noted.
SET1,2 INPUT
SET1,2 Low Threshold
VL
Input Current
ISET
VSET ≤ 0.4V
-300
µA
POWER CHARACTERISTICS
Sleep Current
IIN(MIN)
Run Current
IRUN
Efficiency
η
VIN1 = 3.3VDC, SLEEP < 0.8V
0.0
VIN1 = 3.3VDC, SLEEP ≥ 2.0V, ISET1 = Open
ISET2 = Ground, VLAMP = 380VRMS
VIN1 = 3.3VDC, SLEEP ≥ 2.0V, ISET1 = Open
ISET2 = Ground, VLAMP = 380VRMS
3
10
µADC
690
mADC
75
%
FUNCTIONAL PIN DESCRIPTION
CONN
PIN
DESCRIPTION
CN1 (Molex 53261-0890) Mates with 51021-0800 housing, 50079-8100 pins. Mates with LX9501 input cable assembly
CN1-1
CN1-2
CN1-3
CN1-4
VIN1
Main Input Power Supply (3V < VIN1 < 3.6V)
GND
Power Supply Return
CN1-5
SLEEP
ON/OFF Control. (0V < SLEEP < 0.8 = OFF, SLEEP ≥ 2.0V = ON
CN1-6
BRITE
Brightness Control (0.5V to 2.0VDC). 2.0VDC gives maximum lamp current.
CN1-7
SET1
SET1 MSB Connecting this pin to ground decreases the output current (see Table 1)
CN1-8
SET2
SET2 LSB Connecting this pin to ground decreases the output current (see Table 1)
CN2-1
VHI
High voltage connection to high Side of lamp. Connect to lamp terminal with shortest lead length.
DO NOT connect to Ground.
CN2-2
VLO
Connection to low side of lamp. Connect to lamp terminal with longer lead length.
DO NOT connect to Ground
CN2 for LXM1617-03-23 (Honda QZ-19-A3MYL #02)
CN2-3
VHI
High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length.
DO NOT connect to Ground.
CN2-1
VLO
Connection to low side of lamp. Connect to lamp terminal with longer lead length.
DO NOT connect to Ground
Copyright © 2002
Rev. 1.0b, 2005-01-14
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
ELECTRICALS
CN2 for LXM1617-03-21 and -22 (JST SM02(8.0)B-BHS-1-TB | Yeon Ho 20015WR-05A00 or SM02B-BHSS-1-TB | Yeon Ho 35001WR-02A00)
PanelMatch™
I N T E G R A T E D
LXM1617-03-2x
3.3V 2.2W CCFL Programmable Inverter Module
P R O D U C T S
P RODUCTION D ATASHEET
WWW . Microsemi .C OM
TABLE 1
OUTPUT CURRENT SETTINGS
SET1
(Pin 7)
Open*
Open*
Ground
Ground
SET2
(Pin 8)
Open*
Ground
Open*
Ground
Nominal Output Current
5.0mA
4.5mA
4.0mA
3.5mA
* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
PHYSICAL DIMENSIONS
LXM1617-03-2X
86mm
71mm
3.39in
MOUNTING HOLE
2.44MM ±0.08 DIA.
2.80in
X CN1
16mm
3.5mm
0.63in.
0.138in.
9mm ±2mm
0.354 in.
CN2
12.5mm
0.492in
W
11mm
GROUNDED MOUNTING
HOLE 2.44MM ±0.08 DIA.
0.433in.
60mm ±0.2mm
2.36in.
0.8mm
4.6mm Max
0.0315in.
0.181in.
PCB tolerances ± 0.5mm, M2 or 2-56 recommended mounting screws
R1.0
Warning
High Voltage Present at
high side of transformer
Weight: (5.7g) typ. and Output Connector
All dimensions are in millimeters, inches are for reference only.
SIMPLIFIED BLOCK DIAGRAM
High Voltage
Transform er
Controller
V BRIT E
10K
Comparator
+
0.5 2V DC
Ramp
+3V
Ram p
Gen
V IN1
OC SEN SE
PACKAGE DATA
-
Transform er
Driver
V HI
LAMP
+3V
10K
SET 1
SET 2
Copyright © 2002
Rev. 1.0b, 2005-01-14
+3V
OV SENSE
10K
I SENSE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
V LO
Page 4
PanelMatch™
I N T E G R A T E D
P R O D U C T S
LXM1617-03-2x
3.3V 2.2W CCFL Programmable Inverter Module
P RODUCTION D ATASHEET
3.3V
The brightness control may be a voltage output DAC or
other voltage source, a digital pot or 20K manual pot. The
inverter contains an internal 10K pull-up to 3V to bias the
pot add a 1.8K resistor to set the lower threshold voltage.
A 3.3V Logic Level PWM signal from a micro-controller
may also be used as shown in Figure 1A.
ƒ
If you need to turn the inverter ON/OFF remotely, connect
to TTL logic signal to the SLEEP input.
V LO
ƒ
Figure 1 – Brightness Control
(Output current set to maximum)
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.
ƒ
Use the SET1 and SET2 (see Figure 2) inputs to select the
desired maximum output current. Using these two pins in
combination allows the inverter to match a wide variety of
panels from different manufactures. Generally the best
lamp lifetime correlates with driving the CCFL at the
manufactures nominal current setting. However the SET1
and SET2 inputs allow the user the flexibility to adjust the
current to the maximum allowable output current to
increase panel brightness at the expense of some reduced
lamp life.
ƒ
Although the SET pins are designed such that just leaving
them open or grounding them is all that is needed to set the
output current, they can also be actively set. Using a open
collector or open drain logic signal will allow you to reduce
the lamp current for situations where greater dim range is
required, as an example in nighttime situations. In
conjunction with a light sensor or other timer the panel
could be set to higher brightness (maximum output current)
for daytime illumination and lower brightness (minimum or
typical output current) at nighttime. Since the dim ratio is a
factor of both the burst duty cycle and the peak output
current, using this technique the effective dim ratio can be
increased greater than the burst duty cycle alone.
Conversely the SET inputs could be used to overdrive the
lamp temporarily to facilitate faster lamp warm up at initial
lamp turn on. Of course any possible degradation on lamp
life from such practices is the users responsibility as not all
lamps are designed to be overdriven.
ƒ
The inverter has a built in fault timeout function. If
the output is open (lamp disconnected or broken) or shorted
the inverter will attempt to strike the lamp for several
seconds. After about 2 seconds without success the inverter
will shutdown. In order to restart the inverter it is
necessary to toggle the sleep input or cycle the VIN1 input
supply.
V IN1
BRITE
0.45V 20K
to 2.0V
V HI
LXM1617-03-2x
1.8K
SLEEP
SET 1
SET 2
GND
CCFL
TUBE
NC
NC
PW M Signal
from System
BRITE
P.W .
LXM1617-03-2x
10µs to 125µS
0 < P.W. < 100% of period
Figure 1A – PWM Brightness Control
3.3V
V IN1
BRITE
V HI
CCFL
TUBE
LXM1617-03-2x
SLEEP
SET 1
L
L
H
H
SET 2
GND
V LO
L
3.5mARMS
H
4.0mARMS
L
4.5mARMS
H
5.0mARMS
L=GND; H= Open
Figure 2 – Max Output Current
(SET1 and SET2 Inputs)
Copyright © 2002
Rev. 1.0b, 2005-01-14
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
APPLICATION
ƒ
DAC or
Pot
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TYPICAL APPLICATION
PanelMatch™
I N T E G R A T E D
P R O D U C T S
LXM1617-03-2x
3.3V 2.2W CCFL Programmable Inverter Module
P RODUCTION D ATASHEET
WWW . Microsemi .C OM
NOTES
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 © 2002
Rev. 1.0b, 2005-01-14
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6