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  Microsemi Electronic Components Datasheet  

LXM1643-12-62 Datasheet

CCFL Programmable Inverter Module

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PanelMatch™
LXM1643-12-62
INTEGRATED PRODUCTS
12V Quad 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
DESCRIPTION
The LXM1643-12-62 is a Quad 6W The resultant “burst drive” that
Output Direct Drive™ CCFL (Cold energizes the lamp was designed
Cathode Fluorescent Lamp) Inverter specifically to ensure that no premature
Module specifically designed for driving lamp degradation occurs, while allowing
LCD backlight lamps. It is ideal for significant power savings at lower dim
driving typical 12.1” to 18.1” TFT panels. levels.
LXM1643 modules provides the The modules convert DC voltage from
designer with a vastly superior display the system battery or AC adapter directly
brightness range then typical with analog to high frequency, high-voltage waves
(amplitude control) dimming.
required to ignite and operate CCFL
The inverter includes a dimming input lamps.
that permits brightness control from either The LXM1643-12-62 inverter is
a DC voltage source or a PWM signal or intended for panel assemblies with
external Potentiometer. The maximum individual lamp connections, or where
output current is externally programmable lamps are spaced apart from each other.
over a range of 5 to 8mA in 1mA steps to The LXM1643-12-61 inverter should be
allow the inverter to properly match to a used for panel applications where lamp
wide array of LCD panel lamp current pairs are in close proximity and share a
specifications.
RangeMAX
Digital
common return (low side) wire.
Dimming Other benefits of this new topology
Technique provides flicker-free brightness are stable fixed-frequency operation,
control in any wide range typically (50:1+) secondary-side strike-voltage regulation
dimming application.
and both open/shorted lamp protection
with fault timeout.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
KEY FEATURES
ƒ Externally Programmable
Maximum Output Current
ƒ Easy to Use Brightness
Control
ƒ RangeMAX Wide Range
Dimming
ƒ Output Short-Circuit Protection
and Automatic Strike-Voltage
Regulation and Timeout
ƒ Fixed Frequency Operation
ƒ Rated From -20 to 70°C
ƒ UL 60950 E175910
APPLICATIONS
ƒ High Brightness Displays
ƒ Desktop Displays
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 specifications
ƒ
Universal Dimming Input PWM, VDC, or Potentiometer
DC Voltage
Source
Potentiometer
PWM
Signal
"
"
Selectable Maximum Output Current 5mA to 8mARMS
PART NUMBER
LXM1643-12-62
PACKAGE ORDER INFO
OUTPUT CONNECTORS
Four JST SM02B-BHSS-1-TB
INVERTER MATES DIRECTLY TO
PANEL CONNECTORS
JST BHSR-02VS-1
Copyright 2002
Rev. 1.0, 2003-10-14
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1


  Microsemi Electronic Components Datasheet  

LXM1643-12-62 Datasheet

CCFL Programmable Inverter Module

No Preview Available !

PanelMatch™
LXM1643-12-62
INTEGRATED PRODUCTS
12V Quad 6W CCFL Programmable Inverter Module
PRODUCTION DATASHEET
ABSOLUTE MAXIMUM RATINGS (NOTE 1)
Input Signal Voltage (VIN1).....................................................................................................................................-0.3V to 15V
Input Power ....................................................................................................................................................................... 30W
Output Voltage, no load ............................................................................................................ Internally Limited to 2000VRMS
Output Current (each output) ......................................................................................................9.5mARMS (Internally Limited)
Output Power (each output) ............................................................................................................................................. 6.0W
Input Signal Voltage ( SLEEP Input) ..................................................................................................................... -0.3V to VIN1
Input Signal Voltage (BRITE) ...............................................................................................................................-0.3V to 5.5V
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.
Parameter
Symbol
Recommended Operating Conditions
Min R.C. Max
Input Supply Voltage Range (Fully Regulated
Lamp Current)
VIN1
10.8
12
13.2
Input Supply Voltage Range (Functional)
10.2 12 13.8
Output Power (each output)
PO 5.0 6.0*
Linear BRITE Control Input Voltage Range
VBRT_ADJ
0.5
2.0
Lamp Operating Voltage
VLAMP
530
625
730
Lamp Current (Full Brightness)
IOLAMP
5
8
Operating Ambient Temperature Range
TA -20
70
*Total output power must not exceed 6W . Higher voltage lamps may require maximum output current to be set lower than 8mARMS
Units
V
W
V
VRMS
mARMS
°C
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
` OUTPUT PIN CHARACTERISTICS
Full Bright Lamp Current (each output)
Full Bright Lamp Current (each output)
Full Bright Lamp Current (each output)
Full Bright Lamp Current (each output)
Output Current Lamp to Lamp
Deviation
Min. Average Lamp Current
(each output)
Lamp Start Voltage
Operating Frequency
Burst Frequency
IL(MAX)
IL(MAX)
IL(MAX)
IL(MAX)
ILL%DEV
IL(MIN)
VLS
fO
fBURST
VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC
ISET1 = Ground, ISET2 = Ground
VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC
ISET1 = Ground, ISET2 = Open
VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC
ISET1 = Open, ISET2 = Ground
VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC
ISET1 = Open, ISET2 = Open
VBRT_ADJ > 2.0VDC, SLEEP > 2.0V, VIN1 = 12VDC
ISET1 = Open, ISET2 = Open
VBRT_ADJ 0.5VDC, SLEEP > 2.0V, VIN1 = 12VDC
ISET1 = ISET2 = Ground
-20°C < TA < 70°C, VIN1 > 10.8VDC
VBRT_ADJ = 2.5VDC, SLEEP > 2.0V, VIN1 = 12V
Output Burst Frequency
LXM1643-12-62
Units
Min Typ Max
4.0 5
5.0 6
6.0 7
7.0 8
3
1500
69
269
.30
1650
72
281
5.5 mARMS
6.6 mARMS
7.7 mARMS
8.8 mARMS
10 %
mARMS
VRMS
75 kHz
279 Hz
Copyright 2002
Rev. 1.0, 2003-10-14
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2


Part Number LXM1643-12-62
Description CCFL Programmable Inverter Module
Maker Microsemi Corporation
Total Page 6 Pages
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