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PDF LXM1597-01 Data sheet ( Hoja de datos )
| Número de pieza | LXM1597-01 | |
| Descripción | 5V CCFL INVERTER MODULES | |
| 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 ATENT P ENDING
L I N DO C #: 1597
LXM1597-01
5V CCFL INVERTER MODULES
Not recommended for New Designs
DESCRIPTION
LXM1597-01 CCFL (cold cathode florescent
lamp) Inverter Modules are specifically de-
signed for driving LCD back light lamps in
applications where dimmability, ultra-high
efficiency, high light output, low noise emis-
sions, reliable fail safe design, and small form
factors are critical parameters. Both mono-
chrome and color displays are supported.
The modules convert unregulated DC
voltage from the system battery or AC
adapter directly to high-frequency, high-
voltage sine waves required to ignite and
operate CCFL lamps. The module design is
based on a proprietary Linfinity IC that pro-
vides important new performance advances.
Remarkable improvements in efficiency
and RF emissions result from its single stage
resonant inverter featuring a patent pend-
ing Current Synchronous, Zero Voltage
Switching (CS-ZVS) topology. CS-ZVS pro-
duces nearly pure sine wave currents in the
lamp enabling maximum light delivery while
reducing both conducted and radiated noise.
This topology simultaneously performs
three tasks consisting of line voltage regu-
lation, lamp current regulation, and lamp
dimming in a single power stage made up
of two pairs of low loss FET's. The FET's
drive an LC resonant circuit that feeds the
primary of a high voltage transformer with
a sinusoidal voltage.
Required L and C values in the resonant
circuit are such that very low loss compo-
nents can be used to obtain higher electri-
cal efficiency than is possible with previous
topologies.
The full bridge LXM1597-01 is optimized
to efficiently operate with up to 4 watt lamps
at input voltages of 5 volts. This module
will operate over the full 4.5V to 7V input
voltage range.
The modules are equipped with a dim-
ming input that permits full range bright-
ness control from an external potentiom-
eter, and a sleep input that reduces module
power to a few microwatts in shut down
mode.
All modules feature output open and short
circuit protection.
IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
BACKLIGHT INVERTER LIGHT OUTPUT EFFICIENCY COMPARISON
50
45
40
35
30
25
20
15
10
5
0
Computer 1
Computer 2
Linfinity
Computer 3
Stock
MODULE ORDER INFO
5V I N P U T
LXM1597-01
KEY FEATURES
s 15 to 30% More Light Output
s Closed Loop, Fully Regulating Design
s 4.5V To 7V Input Voltage Range
s Versatile Brightness Control Input
s 3 MicroAMP Sleep Current
s Output Short Circuit Protection And
Automatic Over-Voltage Limiting
s 8mm Max. Height, Narrow Footprints
s Single Sided PCB Is Self Insulating
APPLICATIONS
s Notebook And Sub-Notebook Computers
s Personal Digital Assistants
s Portable Instrumentation
s Automotive Displays
s Desktop Displays
s Airline Entertainment Centers
BENEFITS
s Ultra-High Efficiency, Line Voltage
Regulation And Sleep Mode Extend
Computer Battery Life
s Cool Operation PermitS Close Proximity
To LCD Panel Without Display Distortion
s Smooth, Full-Range Brightness Control
Gives Your Product A High Quality Image
s Low EMI / RFI Design Minimizes Shielding
Requirements
s Narrow, Low-Profile Standard Modules Fit
Into Most LCD Enclosures
s Single Sided PCB Saves Expensive High
Voltage Insulating Tapes
Copyright © 1998
Rev. 0.6a 10/00
LINFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1
1 page  
PRODUCT DATABOOK 1996/1997
5V CCFL INVERTER MODULES
Not Recommended for New Designs
P ATENT P ENDING
LXM1597-01
E F F I C I E N C Y M E A S U R E M E N T S E T U P (continued)
DC
Power Supply
DC
Amp Meter
DC
Volt Meter
PIN = VDC * IDC
Sleep Control = Logic "1"
Dimming
Control
CCFL
J1803
Luminance
Head
J17
Photometer
Copyright © 1998
Rev. 0.6a 10/00
FIGURE 2 — Light Output Measurement Setup
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 LXM1597-01.PDF ] | |
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