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PDF LXM1614 Data sheet ( Hoja de datos )
| Número de pieza | LXM1614 | |
| Descripción | DUAL DIMMING/ EXTENDED TEMPEERATURE CCFL INVERTER MODULE | |
| Fabricantes | Microsemi Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LXM1614 (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
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A MICROSEMI COMPANY
RangeMAX™
LXM1614-14-11
DUAL DIMMING, EXTENDED TEMPEERATURE CCFL INVERTER MODULE
PRELIMINARY DATASHEET
Dual Drive, RangeMAX Wide Range
Dimming, Single Output Inverter. The
LXM1614 series of Direct Drive™ CCFL
(Cold Cathode Fluorescent Lamp)
Inverter Modules is specifically designed
for driving LCD backlight lamps.
Although similar to the RangeMAX
LXM1612 wide range dimming inverters,
the LXM1614 family offers two separate
brightness controls for lamp current
amplitude and duty cycle. This
innovation of dual brightness control with
extended dimming, combined with
Linfinity’s high efficiency Direct Drive
topology, provides the industry’s most
feature rich, small form factor inverter
available. The wide range dimming pro-
vides exceptional display readability at
less than 1% of full brightness, allowing
both power savings and low ambient light
operating capability.
Dual Drive Dimming Control. The
inverters provide brightness ad-
justments utilizing standard lamp current
amplitude control as well as supporting
Linfinity’s RangeMAX wide range
dimming technique. Combining both
brightness controls into a single inverter
supports the “self heating” lamp tech-
nology by using a “boost” current
feature and still offers duty cycle control
for low brightness operation. This
controlled overdrive capability
eliminates the need for traditional
resistive heater wire methods to ensure
light output at extremely low
temperatures. The LXM1614 brightness
controls support temperature monitoring
with look-up table applications by
accepting either a PWM input or DC
voltage. Large panel lamps with greater
thermal inertia can also utilize this
“instant-bright” feature and minimize
warm up time.
(continued next page)
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Independent Brightness
Controls For Lamp Current
Amplitude and Duty Cycle
RangeMAX 1-100% Wide
Range Dimming with
Controlled Overdrive Boost
On-Board Thermister auto-
matically limits maximum
lamp current
Supports Wide Input Voltage
Range 9-16V
High Efficiency, Single Stage
Direct Drive Topology
-40°C to +85°C Ambient
Temperature Operation
Output Open/Short Circuit
Protection
Up to 1800V Output Voltage
Capability
Single side PCB Component
Layout
Self Heating And High
Pressure Lamp Technology
Automotive Navigation, GPS
Systems, Auto PC
Extended Cold Temperature
Operation
Aircraft Cabin Displays
Low Ambient Light Conditions
Requiring Wide Range
Dimming
“Instant On” To Full
Brightness For Large LCD
Backlight Panels
Industrial Notebook And
Workstations
Controlled overdrive mode of
LXM1614 Inverter accelerates
lamp warm-up time to provide
maximum light output even in
extreme temperature envi-
ronments
PART NUMBER
LXM1614-14-11
OUTPUT CONNECTOR
JST SM02(8.0)B-BHS-1-TB
INVERTER MATES DIRECTLY TO
PANEL CONNECTORS
BHR-03VS-1
Copyright © 2000
Rev. 0.3b,2000-11-20
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
1 page  
A MICROSEMI COMPANY
RangeMAX™
LXM1614-14-11
DUAL DIMMING, EXTENDED TEMPEERATURE CCFL INVERTER MODULE
PRELIMINARY DATASHEET
VBST
.5 -
4.5VDC
High Voltage
Transformer
Gain &
Summing
Transformer
Driver
VOUT1
VBRT
.5 -
4.5VDC
C o m p a ra to r
Ramp
+
-
V SYN C
Ramp Gen.
& PLL
VSENSE
I
SENSE
Temperature
Sense
I/V
VOUT2
– RangeMAX Simplified Block Diagram
HIGHLIGHTS
• Integrated dual brightness control circuit includes a DC
voltage to pulse width converter that minimizes system
design work and system noise susceptibility. This provides
a familiar and convenient interface while reducing the
potential for externally induced noise, which can cause
lamp flicker.
• RangeMAX inverter modules are designed to operate with
the burst frequency synchronized to the video frame rate.
This provides operation with no visible display disturbances
caused by beat frequencies between the lamps and video
frame rates. In this synchronous mode, the inverter burst
rate operates at twice the video refresh rate, well beyond
standard 50/60Hz video refresh rates where the eye can
perceive pulsing light.
• In applications with no access to a vertical sync, an
onboard oscillator operates the inverter burst rate at
about 170Hz. In this non-synchronous mode, minor
display disturbances can be found under certain video
conditions. This performance may be acceptable for
many applications, but synchronization must be used
when no disturbance can be tolerated.
• Separate feedback loops for lamp current and open
circuit voltage regulation insure reliable strike under all
operating conditions, automatic over-voltage prevention
with broken or failed lamps, and accurate lamp current
regulation.
• A single input will accommodate negative and positive
vertical sync pulses at any pulse width.
Copyright © 2000
Rev. 0.3b,2000-11-20
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet LXM1614.PDF ] | |
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