LXM1618-03-2X [MICROSEMI]
3.3V 2.2W CCFL Programmable Inverter Module; 3.3V 2.2W CCFL可编程的逆变器模块
| 型号： | LXM1618-03-2X |
| 厂家： | 
Microsemi |
| 描述： | 3.3V 2.2W CCFL Programmable Inverter Module |
| 文件： | 总6页 (文件大小：182K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PanelMatch™
LXM1618-03-2x
3.3V 2.2W 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 LXM1618-03-2x is
Output 2.2W 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 3.9” to 6.4” panels. particularly well suited for current
The maximum output current is amplitude dimming.
a
Single
For applications not requiring wide
Externally Programmable
Maximum Output Current
Easy to Use Brightness
Control
Output Short-Circuit
Protection and Automatic
Strike-Voltage Regulation
and Timeout
Analog Current Amplitude
Dimming Method
Fixed Frequency Operation
Rated From -20 to 70°C
UL60950 E175910
potential
transient
noise
externally programmable over a range of
The modules convert DC voltage from
3.5 to 5mA in 0.5mA steps to allow the the system battery or AC adapter directly
inverter to properly match to a wide array to high frequency, high-voltage waves
of LCD panel lamp current specifications. required to ignite and operate CCFL
The modules are include a dimming input lamps. A 5V input inverter is also
that permits brightness control from either available (LXM1618-05-2x).
a DC voltage source, a PWM signal or an
external potentiometer.
The modules design is based on
Microsemi’s new LX1689 backlight
APPLICATIONS
PDA’s
Portable Instrumentation
Industrial Display Controls
LXM1618
modules
unlike
the controller, which provides a number of
LXM1617 series does not provide wide cost and performance advantages due to
range ‘burst’ mode dimming, rather the controller’s high level of integration.
dimming is provided by amplitude control
of the output current waveform, this limits are stable fixed-frequency operation,
the potential dim range to typically less secondary-side strike-voltage regulation
Other benefits of this new topology
BENEFITS
Compact, Low Profile Design
Mates to a wide variety of
LCD Panels
Output Open Circuit Voltage
Regulation Minimizes
Corona Discharge For High
Reliability
than 5:1.
and both open and shorted lamp
protection with fault timeout.
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 D C
,
O R P O T E N T IO M E T E R
PWM
Signal
DC Voltage
Source
Potentiometer
W
S
E L E C T A B L E
M
A X IM U M
O U P U T C U R R E N T
3 .5
M
A
T O 5 M A R M S
PACKAGE ORDER INFO
INVERTER
M
C
ATES
DIRECTLY TO PANEL
O
UTPUT CONNECTOR
P
ART NUMBER
ONNECTORS
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
JST BHR-03VS-1
JST BHSR-02VS-1
Honda QZ-19-3F01
LXM1618-03-21
LXM1618-03-22
LXM1618-03-23
Copyright © 2002
Rev. 1.1a 2005-01-17
Microsemi
Page 1
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PanelMatch™
LXM1618-03-2x
3.3V 2.2W 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 5V
Input Power...................................................................................................................................................................... 3.0W
Output Voltage, no load .............................................................................................................. Internally Limited to 130VRMS
Output Current ...............................................................................................................................6mARMS (Internally Limited)
Output Power ................................................................................................................................................................... 2.3W
Input Signal Voltage (
Input).......................................................................................................................-0.3V to 5V
SLEEP
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.
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)
3
3.3
3.6
VIN1
V
Input Supply Voltage Range (Functional)
Output Power
Linear BRITE Control Input Voltage Range¹
Lamp Operating Voltage
Lamp Current (Full Brightness)
Operating Ambient Temperature Range
2.9
4.2
2.2
2.0
435*
5†
PO
VBRT_ADJ
VLAMP
IOLAMP
TA
W
V
VRMS
mARMS
°C
0.65 to 0.9
325
380
3.5
-20
70
¹The minimum VBRT ADJ voltage depends on the panel characteristics, depending on the panel it can vary from 0.65V to 0.9V
*Total output power must not exceed 2.2W . Higher voltage lamps may require maximum output current to be set lower than 5mARMS
†At 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.
LXM1618-03-2x
Parameter
Symbol
Test Conditions
Units
Min
Typ
Max
OUTPUT PIN CHARACTERISTICS
`
VBRT_ADJ > 2.0VDC
,
> 2.0V, VIN1 = 3.3VDC
SLEEP
ISET1 = Ground, ISET2 = Ground
VBRT_ADJ > 2.0VDC
Full Bright Lamp Current
IL(MAX)
IL(MAX)
IL(MAX)
IL(MAX)
IL(MIN)
3.0
3.5
4.0
4.5
3.5
4.0
4.5
5
4.0
4.5
5.0
5.5
mARMS
mARMS
mARMS
mARMS
mARMS
,
> 2.0V, VIN1 = 3.3VDC
> 2.0V, VIN1 = 3.3VDC
> 2.0V, VIN1 = 3.3VDC
> 2.0V, VIN1 = 3.3VDC
SLEEP
ISET1 = Ground, ISET2 = Open
VBRT_ADJ > 2.0VDC
Full Bright Lamp Current
Full Bright Lamp Current
,
SLEEP
ISET1 = Open, ISET2 = Ground
VBRT_ADJ > 2.0VDC
,
SLEEP
ISET1 = Open, ISET2 = Open
VBRT_ADJ =0.65VDC
Full Bright Lamp Current
Min. Average Lamp Current
,
SLEEP
ISET1 = ISET2 = Ground
-20°C < TA < 70°C, VIN1 > 3.15VDC
1.5*
Lamp Start Voltage
Operating Frequency
VLS
fO
1000
85
1100
90
VRMS
kHz
V
BRT_ADJ = 2.5VDC > 2.0V, VIN1 = 3.3V
,
94
SLEEP
* 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. 1.1a 2005-01-17
Microsemi
Integrated Products
Page 2
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PanelMatch™
LXM1618-03-2x
3.3V 2.2W 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.
LXM1618-03-2x
Parameter
Symbol
Test Conditions
Units
Min
Typ
Max
BRITE INPUT
`
VBRT_ADJ = 0VDC
VBRT_ADJ = 3VDC
-300
50
µADC
µADC
Input Current
IBRT
Minimum Input for Max. Lamp Current VBRT_ADJ IO(LAMP) = Maximum Lamp Current
2.0
2.05
VDC
VDC
Minimum Input for Min. Lamp Current
SLEEP INPUT
VBRT_ADJ IO(LAMP) = Minimum Lamp Current
0.65*
`
`
`
VSLEEP
VSLEEP
RUN Mode
2.0
VIN1
0.8
VDC
VDC
SLEEP Mode
-0.3
SET1,2 INPUT
SET1,2 Low Threshold
Input Current
VL
0.4
10
V
ISET
VSET ≤ 0.4V
-300
µA
POWER CHARACTERISTICS
Sleep Current
IIN(MIN)
IRUN
V
IN1 = 3.3VDC
,
,
< 0.8V
0.0
3
µADC
SLEEP
SLEEP
VIN1 = 3.3VDC
≥ 2.0V, ISET1 = Open
Run Current
690
mADC
ISET2 = Ground, VLAMP = 380VRMS
IN1 = 3.3VDC ≥ 2.0V, ISET1 = Open
V
,
SLEEP
ISET2 = Ground, VLAMP = 380VRMS
Efficiency
75
%
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
CONN
P
IN
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
Main Input Power Supply (3V < VIN1 < 3.6V)
Power Supply Return
VIN1
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 ~ 1mA (see Table 1)
SET2 LSB Connecting this pin to ground decreases the output current ~ 0.5mA (see Table 1)
SET2
CN2 for LXM1618-03-21 and -22 (JST SM02(8.0)B-BHS-1-TB / Yeon Ho 20015WR-05A00 or SM02B-BHSS-1-TB / Yeon Ho 35001WR-02A00)
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 LXM1618-03-23 (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
Copyright © 2002
Rev. 1.1a 2005-01-17
Microsemi
Integrated Products
Page 3
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PanelMatch™
LXM1618-03-2x
3.3V 2.2W 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
5.0mA
4.5mA
4.0mA
3.5mA
Ground
* If driven by a logic signal it should be open collector or open drain only, not a voltage source.
PHYSICAL DIMENSIONS
L X M1618- 0 3-2X
86mm
3.39in
71mm
2.80in
M
OUNTING HOLE
2.44MM ±0.08 DIA
.
CN1
X
16mm
0.63in.
3.5mm
0.138in.
9mm ±2mm
0.354 in.
CN2
12.5mm
0.492in
W
11mm
0.433in.
G
ROUNDED
M
OUNTING
.
H
OLE 2.44MM ±0.08 DIA
60mm ±0.2mm
2.36in.
0.8mm
4.6mm Max
0.181in.
0.0315in.
Warning
High Voltage Present at
high side of transformer
and Output Connector
Weight: (5.7g) typ.
PCB tolerances ± 0.5mm, M2 or 2-56 recommended mounting screws
R1.0
All dimensions are in millimeters, inches for reference only.
SIMPLIFIED BLOCK DIAGRAM
+3V
High Voltage
Transformer
VHI
10K
VBRITE
Controller
and
Transformer
Driver
VIN1
0.65 -
2VDC
+3V
10K
10K
OCSENSE
SET1
SET2
+3V
OVSENSE
ISENSE
VLO
Copyright © 2002
Rev. 1.1a 2005-01-17
Microsemi
Page 4
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PanelMatch™
LXM1618-03-2x
3.3V 2.2W 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
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 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.
3.3V
VIN1
DAC or
Pot
BRITE
0.65V
to 2.0V
20K
VHI
LXM1618-03-2x
CCFL
TUBE
2.7K
If you need to turn the inverter ON/OFF remotely, connect
to TTL logic signal to the
input.
SLEEP
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
SLEEP
SET1
VLO
SET2
NC
GND
NC
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 and efficiency 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 .
LXM1618-03-2x
10µs to 125µS
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 the peak output current, using this technique the
effective dim ratio can be increased. 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.
~26% < P.W. < 100% of
period
Figure 1A – PWM Brightness Control
3.3V
VIN1
BRITE
VHI
CCFL
TUBE
LXM1618-03-2x
SLEEP
SET1
VLO
SET2
GND
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
3.5mARMS
4.0mARMS
4.5mARMS
5.0mARMS
H
L=GND; H= Open
Figure 2 – Max Output Current
(SET1 and SET2 Inputs)
Copyright © 2002
Rev. 1.1a 2005-01-17
Microsemi
Page 5
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
PanelMatch™
LXM1618-03-2x
3.3V 2.2W 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. 1.1a 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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