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PDF LXM1640-01 Data sheet ( Hoja de datos )
| Número de pieza | LXM1640-01 | |
| Descripción | DIRECT DRIVE QUAD LAMP CCFL INVERTER MODULE | |
| Fabricantes | Microsemi Corporation | |
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T H E I N F I N I T E P O W E R O F I N N O VAT I O N
P ATENTS P ENDING
LIN D O C #: 1640
LXM1640-01
DIRECT DRIVE QUAD LAMP CCFL INVERTER MODULE
PR E L I M I N A RY D ATA S H E E T
DESCRIPTION
The Quad Output Module Ideal for
Desktop and Industrial Applications.
The LXM1640 Direct DriveTM Cold Cathode
Fluorescent Lamp (CCFL) Inverter is a single
module designed to drive four lamps and
is targeted for use with desktop Liquid Crys-
tal Display (LCD) and industrial LCD pan-
els typically ranging in size from 14-inches
to 21-inches. This four output inverter is
the ideal solution to power virtually any
four lamp application.
Direct Drive Technology. The mod-
ule design is based on a new Direct Drive
topology, which provides a number of cost
and performance advantages. The
LXM1640-01 Direct Drive inverters eliminate
the classic resonant inductor and capaci-
tors, thus reducing cost and allowing a sub-
stantial reduction in module size.
Fixed-Frequency Operation. Other
benefits of this new topology are fixed-fre-
quency operation and secondary-side
strike-voltage regulation. Strike-voltage
regulation minimizes corona discharge in
the output transformer and related circuitry,
providing longer life and higher reliability.
Fail-safe Feature For Multiple Lamp
Applications. Our multi-output inverters
are designed to keep your application op-
erating at near normal brightness in the
event that a lamp fails. This allows the
display to remain "on-line" until lamp re-
placement is convenient.
Quad Module Uses Standard Power
Supply. The LXM1640 module uses a stan-
dard 12V input supply. It also ensures
nominal power consumption with 4 lamps
requiring only 16 watts. Lamp current is
fully regulated with respect to input volt-
age and output impedance variations.
Dimming Features. The LXM1640 mod-
ules are equipped with a dimming input
that permits brightness control from an
external potentiometer or DC voltage. In
addition, the sleep input reduces module
power to a few microwatts in shut down
mode. All LXM1640 modules feature both
output open and short-circuit protection.
The Most Efficient and Cost-effective
Backlight Inverter for Desktop/Indus-
trial Applications. Linfinity's proprietary
Direct Drive architecture is the highest ef-
ficiency, small form factor solution for all
multiple lamp applications. The LXM1640
is fully customizable (electronically and me-
chanically) to specific customer require-
ments.
IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.
KEY FEATURES
s Drive Four Lamps With One Module
s Small, Compact Size
s High Efficiency
s Multiple Output Connectors Provide Easy
LCD Connections
s Low EMI And Noise
s Low Power Sleep Mode
s Output Short And Open Circuit Protection
s 3:1 Dimming Control
s Adjustable Lamp Current Up To 6.0mA Per
Lamp
s Long Lamp Life With Soft-Start And
Accurate Lamp Current Regulation
A P P L I C AT I O N S
s Desktop LCD Monitors And Panels
s Industrial LCD Panels
s Hi-Brite Displays
BENEFITS
s Cool Operation
s Smooth, Easy-To-Use Brightness Control
s Single 12 Volt Supply
PRODUCT HIGHLIGHT
LXM1640 "UNIVERSAL" MODULE CONNECTION OPTIONS
Quad Connector Configuration
Dual Connector Configuration
CCFL Lamps
CCFL Lamps
Copyright © 1998
Rev. 0.4 5/98
Desktop Display
Desktop Display
M O D U L E O R D E R I N F O R M AT I O N
LXM1640-01
LINFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1
1 page  
PRODUCT DATABOOK 1996/1997
DIRECT DRIVE QUAD LAMP CCFL INVERTER MODULE
PR E L I M I N A RY D ATA S H E E T
LXM1640-01
DIRECT DRIVE OUTPUT ARCHITECTURE
Direct Drive architecture includes two load feedback control loops
to provide uncompromised CCFL ignition and operation character-
istics.
Lamp current is regulated in the CCFL return lead (ISNS loop) to
insure constant light output with changing lamp parameters and
power supply voltage. This also allows accurate and repeatable
brightness control. Dimming ratio with the LX1640 analog dimming
inverters is typically 6:1 when driving quad LCD lamp panels.
If no current flows in the CCFL return path because of an
unstruck or failed lamp, the inverter applies full strike voltage
potential. The output voltage feedback loop (VSNS) takes control
and regulates output voltage to 1650VRMS. This insures lamps will
ignite under worst case temperature and aging conditions.
Because output voltage is actively regulated, it will never exceed
component and panel insulation ratings. This prevents destructive
corona discharge to insure long term reliability of the system.
SLEEP
BRITE
Controller
High Voltage
Transformer
Transformer
Driver
VHI1
GND
VSENSE
ISENSE
VLO
FIGURE 3 — LXM1640 Block Diagram
(Only one lamp shown)
5.0VDC
≤10k
5V
0V
TYPICAL APPLICATIONS
10.8VDC- 13.2VDC
VIN
BRITE
LXM1640-01
VHI4
VHI3
VHI2
VHI1
SLEEP
GND
VLO
FIGURE 4 — Potentiometer Brightness Control
Copyright © 1998
Rev. 0.4 5/98
PRELIMINARY DATA - Information contained in this document is pre-production data, and is proprietary to LinFinity. It may
not modified in any way without the express written consent of LinFinity. Product referred to herein is offered in sample form
only, and Linfinity reserves the right to change or discontinue this proposed product at any time.
5
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| PDF Descargar | [ Datasheet LXM1640-01.PDF ] | |
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