LXM1624-12-4X [MICROSEMI]
12V Dual 4W CCFL Programmable Inverter Module; 12V双路4W CCFL可编程逆变器模块
| 型号： | LXM1624-12-4X |
| 厂家： | 
Microsemi |
| 描述： | 12V Dual 4W CCFL Programmable Inverter Module |
| 文件： | 总6页 (文件大小：188K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PanelMatch™
LXM1624-12-4x
12V Dual 4W CCFL Programmable Inverter Module
I N T E G R A T E D P R O D U C T S
P
RODUCTION DATASHEET
KEY FEATURES
DESCRIPTION
The LXM1624-12-4x is a Dual 4W
Output Direct Drive™ CCFL (Cold range dimming, amplitude control results
Cathode Fluorescent Lamp) Inverter in lower ripple on the input supply and
Module specifically designed for driving reduced
LCD backlight lamps. It is ideal for generation. Many STN type panels are
driving typical 6.4” to 10.4” TFT panels. particularly well suited for current
The modules are available with a amplitude dimming.
For applications not requiring wide
Externally Programmable
Maximum Output Current
Easy to Use Brightness Control
Analog Current Amplitude
Dimming Method
Output Open/Short-Circuit
Protection and Automatic Strike-
Voltage Regulation and Timeout
Fixed Frequency Operation
Rated From -20 to 70°C
UL60950 E175910
potential
transient
noise
dimming input that permits brightness
The modules convert DC voltage from
control from either a DC voltage source or the system battery or AC adapter directly
a PWM signal or external Potentiometer. to high frequency, high-voltage waves
The maximum output current is externally required to ignite and operate CCFL
programmable over a range of 5 to 6.5mA lamps.
APPLICATIONS
in 0.5mA steps to allow the inverter to
properly match to a wide array of LCD Microsemi’s new LX1689 backlight
The modules design is based on
High Brightness Displays
Portable Instrumentation
Desktop Displays
panel lamp current specifications.
LXM1624 modules unlike
controller, which provides a number of
Industrial Display Controls
the cost and performance advantages due to
LXM1623 series does not provide wide the controller’s high level of integration.
range ‘burst’ mode dimming, rather Other benefits of this new topology
dimming is provided by amplitude control are stable fixed-frequency operation,
of the output current waveform, this limits secondary-side strike-voltage regulation
the potential dim range to typically less and both open/shorted lamp protection
BENEFITS
Compact, Low Profile Design
Programmable output current
allows inverter to mate with a
wide variety of LCD panel’s
specifications
than 5:1.
with fault timeout.
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
,
O R
P
O T E N T IO M E T E R
D C
PWM
Signal
DC Voltage
Source
Potentiometer
W
W
S
E L E C T A B L E
M
A X IM U M
T O 6 .5
O U T P U T C U R R E N T 5 M A
M
A
R M S
PACKAGE ORDER INFO
I
NVERTER
M
ATES
DIRECTLY
P
ART
N
UMBER
OUTPUT CONNECTOR
TO ANEL
P
CONNECTORS
LXM1624-12-41 JST SM02(8.0)B-BHS-1-TB or Yeon Ho 20015WR-05A00
LXM1624-12-42 JST SM02B-BHSS-1-TB or Yeon Ho 35001WR-02A00
LXM1624-12-43 Honda QZ-19-A3MYL #02
JST BHR-03VS-1
JST BHSR-02VS-1
Honda QZ-19-3F01
Copyright © 2002
Rev. 1.0b, 2005-01-17
Microsemi
Page 1
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PanelMatch™
LXM1624-12-4x
12V Dual 4W CCFL Programmable Inverter Module
I N T E G R A T E D P R O D U C T S
P
RODUCTION DATASHEET
ABSOLUTE MAXIMUM RATINGS (NOTE 1)
Input Signal Voltage (VIN1).....................................................................................................................................-0.3V to 15V
Input Power....................................................................................................................................................................... 10W
Output Voltage, no load ............................................................................................................ Internally Limited to 1500VRMS
Output Current ............................................................................................................................7.5mARMS (Internally Limited)
Output Power (each output) ............................................................................................................................................. 4.0W
Input Signal Voltage (
Input)..................................................................................................................... -0.3V to VIN1
SLEEP
Input Signal Voltage (BRITE) ...............................................................................................................................-0.3V to 5.5V
Ambient Operating Temperature, zero airflow.....................................................................................................-20°C to 70°C
Operating Relative Humidity, non-condensing ................................................................................................................ ≤90%
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.
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)
Input Supply Voltage Range (Functional)
Output Power (each output)
Linear BRITE Control Input Voltage Range¹
Lamp Operating Voltage
Lamp Current (Full Brightness)
10.8
10.2
12
13.2
VIN1
V
12
3.5
13.8
4.0
2.0
530
6.5
70
PO
VBRT_ADJ
VLAMP
IOLAMP
TA
W
V
VRMS
mARMS
°C
0.65 to 0.9
350
5
-20
440
Operating Ambient Temperature Range
¹ The minimum VBRT ADJ voltage depends on the panel characteristics, depending on the panel it can vary from 0.65V to 0.9V
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of
25°C except where otherwise noted.
LXM1624-12-4x
Parameter
Symbol
Test Conditions
Units
Min
Typ
Max
OUTPUT PIN CHARACTERISTICS
`
VBRT_ADJ > 2.0VDC
,
> 2.0V, VIN1 = 12VDC
SLEEP
ISET1 = Ground, ISET2 = Ground
VBRT_ADJ > 2.0VDC
Full Bright Lamp Current (each output)
IL(MAX)
IL(MAX)
IL(MAX)
IL(MAX)
ILL%DEV
IL(MIN)
4.5
5.0
5.5
6.0
5
5.5
6
5.5
6.0
6.5
7.0
10
mARMS
mARMS
mARMS
mARMS
%
,
> 2.0V, VIN1 = 12VDC
> 2.0V, VIN1 = 12VDC
> 2.0V, VIN1 = 12VDC
> 2.0V, VIN1 = 12VDC
> 2.0V, VIN1 = 12VDC
SLEEP
ISET1 = Ground, ISET2 = Open
VBRT_ADJ > 2.0VDC
Full Bright Lamp Current (each output)
Full Bright Lamp Current (each output)
Full Bright Lamp Current (each output)
,
SLEEP
ISET1 = Open, ISET2 = Ground
VBRT_ADJ > 2.0VDC
,
SLEEP
ISET1 = Open, ISET2 = Open
VBRT_ADJ > 2.0VDC
6.5
3
Output Current Lamp to Lamp
Deviation
,
SLEEP
ISET1 = Open, ISET2 = Open
VBRT_ADJ =0.65VDC
Min. Average Lamp Current
(each output)
,
SLEEP
ISET1 = ISET2 = Ground
-20°C < TA < 70°C, VIN1 > 10.8VDC
2²
mARMS
Lamp Start Voltage
Operating Frequency
VLS
fO
1250
76
1400
80
VRMS
kHz
V
BRT_ADJ = 2.5VDC > 2.0V, VIN1 = 12V
,
83
SLEEP
² The inverter is capable of a lower output current than may be recommended by the panel manufacturer. It is the user’s responsibility to set the
minimum brightness (BRITE) input at or above the panel specification for minimum current.
Copyright © 2002
Rev. 1.0b, 2005-01-17
Microsemi
Integrated Products
Page 2
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PanelMatch™
LXM1624-12-4x
12V Dual 4W CCFL Programmable Inverter Module
I N T E G R A T E D P R O D U C T S
P
RODUCTION DATASHEET
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.
LXM1624-12-4x
Parameter
Symbol
Test Conditions
Units
Min
Typ
Max
BRITE INPUT
`
`
VBRT_ADJ = 0VDC
VBRT_ADJ = 3VDC
-300
50
2.0
µADC
µADC
VDC
Input Current
IBRT
Minimum Input for Max. Lamp Current VBRT_ADJ IO(LAMP) = Maximum Lamp Current
Minimum Input for Min. Lamp Current
2.05
VBRT_ADJ IO(LAMP) = Minimum Lamp Current
0.65*
VDC
SLEEP INPUT
VSLEEP
VSLEEP
RUN Mode
2.0
VIN1
0.8
VDC
VDC
SLEEP Mode
SET1,2 INPUT
-0.3
`
`
SET1,2 Low Threshold
Input Current
VL
ISET
0.4
50
V
µA
VSET ≤ 0.4V
-300
POWER CHARACTERISTICS
Sleep Current
IIN(MIN)
IIN(RUN)
V
IN1 = 12VDC
,
,
< 0.8V
0.0
10
µADC
SLEEP
SLEEP
VIN1 = 12VDC
≥ 2.0V, ISET1 = Open
Run Current
530
mADC
ISET2 = Ground, VLAMP = 440VRMS
IN1 = 12VDC ≥ 2.0V, ISET1 = Open
V
,
SLEEP
ISET2 = Ground, VLAMP = 440VRMS
Efficiency
85
%
η
* The Inverter is capable of a lower output current than may be recommended by the panel manufacturer. It is the user’s responsibility to set the minimum brightness
(BRITE) input at or above the panel specification for minimum current. This is likely greater than the 0.65V minimum input.
FUNCTIONAL PIN DESCRIPTION
C
ONN
PIN
DESCRIPTION
CN1 (Molex 53261-0890) Mates with 51021-0800 housing, 50079-8100 pins. Mates with LX9501 input cable assembly
CN1-1
VIN1
Main Input Power Supply (10.8V < VIN1 < 13.2V)
Power Supply Return
CN1-2
CN1-3
CN1-4
GND
CN1-5
ON/OFF Control. (0V <
< 0.8 = OFF,
>= 2.0V = ON
SLEEP
SLEEP
BRITE
SET1
SLEEP
CN1-6
CN1-7
CN1-8
Brightness Control (0.65V to 2.0VDC). 2.0VDC gives maximum lamp current.
SET1 MSB Connecting this pin to ground decreases the output current (see Table 1)
SET2 LSB Connecting this pin to ground decreases the output current (see Table 1)
SET2
CN2, CN3 for LXM1624-12-41 and -42 (JST SM02(8.0)B-BHS-1-TB | Yeon Ho 20015WR-05A00 or SM02B-BHSS-1-TB |
Yeon Ho 35001WR-02A00)
CN2-1
CN3-1
High voltage connection to high Side of lamp. Connect to lamp terminal with shortest lead length.
DO NOT connect to Ground.
VHI
CN2-2
CN3-2
Connection to low side of lamp. Connect to lamp terminal with longer lead length.
DO NOT connect to Ground
VLO
CN2, CN3 for LXM1624-12-43 (Honda QZ-19-A3MYL #02)
CN2-3
CN3-3
High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length.
DO NOT connect to Ground.
VHI
CN2-1
CN3-1
Connection to low side of lamp. Connect to lamp terminal with longer lead length.
DO NOT connect to Ground
VLO
Copyright © 2002
Rev. 1.0b, 2005-01-17
Microsemi
Integrated Products
Page 3
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PanelMatch™
LXM1624-12-4x
12V Dual 4W CCFL Programmable Inverter Module
I N T E G R A T E D P R O D U C T S
P
RODUCTION DATASHEET
TABLE 1
OUTPUT CURRENT SETTINGS
SET1
(Pin 7)
Open*
Open*
Ground
Ground
SET2
(Pin 8)
Open*
Ground
Open*
Nominal Output Current
6.5mA
6.0mA
5.5mA
5.0mA
Ground
* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
PHYSICAL DIMENSIONS
L X M1624- 1 2-4X
115mm
4.53in.
109mm
4.29in.
G
ROUNDED
3MM X 2 DIA. ±0.08
6MM SCREW HEAD CLEARANCE
MOUNTING HOLE
CN1
22mm
0.866in.
CN2
30mm
1.18in.
26mm
1.02in.
CN3
4mm
0.157in
.
103mm ±0.2mm
4.055in.
Warning
6mm
0.23in.
High Voltage
Present at high
side of transformer
and Output
1.0mm
0.0394in.
6.5mm Max
0.256in.
Weight: (15g) typ
.
PCB tolerances ± 0.5mm
Connector
Dimensions are in millimeters (inches are for reference only)
SIMPLIFIED BLOCK DIAGRAM
+3V
High Voltage
Transformer
VHI
10K
VBRITE
Controller
VIN1
0.65 -
2VDC
and
Transformer
Driver
+3V
10K
10K
OCSENSE
SET1
SET2
+3V
OVSENSE
ISENSE
VLO
One of Two
Copyright © 2002
Rev. 1.0b, 2005-01-17
Microsemi
Page 4
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PanelMatch™
LXM1624-12-4x
12V Dual 4W CCFL Programmable Inverter Module
I N T E G R A T E D P R O D U C T S
P
RODUCTION DATASHEET
TYPICAL APPLICATION
12V
VIN1
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 2.7K to 3.9K 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.
DAC or
Pot
BRITE
20K
Rx*
VHI
LXM1624-12-4x
CCFL
TUBE
If you need to turn the inverter ON/OFF remotely, connect
to TTL logic signal to the
input.
SLEEP
SLEEP
SET1
VLO
ONE OF
TW O
Connect VHI to high voltage wire from the lamp. Connect
SET2
NC
GND
V
LO to the low voltage wire (wire with thinner insulation).
NC
Never connect VLO to circuit ground as this will defeat
lamp current regulation. If both lamp wires have heavy
*Set Rx from 2.7K to 3.9K depending on panel
minimum lamp current requirements
high voltage insulation, connect the longest wire to VLO
This wire is typically white.
.
Figure 1 – Brightness Control
(Output current set to maximum)
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.
PW M Signal
BRITE
from System
P.W .
LXM1624-12-4x
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 since not all lamps are designed to be
overdriven.
10us to 125uS
26% > P.W. < 100% of
period
Figure 1A – PWM Brightness Control
12V
VIN1
BRITE
VHI
CCFL
TUBE
LXM1624-12-4x
SLEEP
SET1
VLO
SET2
GND
ONE OF
TW O
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
L
L
H
H
L
H
L
5.0mARMS
5.5mARMS
6.0mARMS
6.5mARMS
H
L=GND; H=Open
Figure 2 – Max Output Current
(SET1 and SET2 Inputs)
Copyright © 2002
Rev. 1.0b, 2005-01-17
Microsemi
Page 5
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PanelMatch™
LXM1624-12-4x
12V Dual 4W CCFL Programmable Inverter Module
I N T E G R A T E D P R O D U C T S
P
RODUCTION DATASHEET
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, 2005-01-17
Microsemi
Page 6
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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