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PDF LMX1622-12-03 Data sheet ( Hoja de datos )
| Número de pieza | LMX1622-12-03 | |
| Descripción | DUAL 5W / DIGITAL DIMMING CCFL INVERTER MODULE | |
| Fabricantes | Microsemi Corporation | |
| Logotipo |  |
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RangeMAX™
LXM1622-12-xx
DUAL 5W, DIGITAL DIMMING CCFL INVERTER MODULE
A MICROSEMI COMPANY
PRELIMINARY DATA SHEET
RangeMAX™ Wide Range Dimming, The resultant “burst drive” that
Dual Output Inverter. The LMX1622 energizes the lamp was designed
series of Direct Drive CCFL (Cold specifically to ensure that no premature
Cathode Fluorescent Lamp) Inverter lamp degradation occurs (See the “How
Modules are specifically designed for RangeMAX Works” section).
driving two lamp LCD displays. They are Input Voltage Range. The modules
available in two power and input voltage convert the DC voltage from a fixed 12V
ranges.
supply directly to high frequency, high-
LMX1622 modules provide the voltage waves required to ignite and
designer with a vastly superior display operate CCFL lamps. A 5V input inverter
brightness range. This brightness range is is also available; LXM1612-05 series.
achievable with virtually any LCD Direct Drive Technology. The
display.
modules design is based on a new Direct
RangeMAX Digital Dimming Drive topology, which provides a number
Technique. Digital dimming provides of cost and performance advantages.
flicker-free brightness control in any wide Additional Features. Other benefits
range (100:1+) dimming application.
of this new topology are fixed-frequency
The modules are available with a dim- operation, secondary-side strike-voltage
ming input that permits brightness control regulation, and both open and shorted
from either a DC voltage source or lamp protection. If lamp fails to strike the
a PWM signal.
inverter will timeout and shutdown.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
RangeMAX Wide Range
Dimming
Fixed 5V input
Easy to Use Brightness Control
Output Short-Circuit Protection
and Automatic Strike-Voltage
Regulation and Timeout
Fixed Frequency Operation
Microamp SLEEP mode
Notebook Sub-Notebook
Computers
Portable Instrumentation
Low Ambient Light
Smooth, Flicker Free 1-100%
Full-Range Brightness Control
Output Open Circuit Voltage
Regulation Minimizes Corona
Discharge For High Reliability
Power Efficient, “Low
Brightness” Capability Allows
For Advanced Power
Management
D C Voltage
S o u rc e
P o ten tio m eter
PW M
S ig n a l
BRITE
PART NUMBER LAMP CURRENT
LMX1622-12-01
LMX1622-12-02
LMX1622-12-03
6.5mA
5.5mA
5.5mA
LAMP RUN
VOLTAGE
500-750
350-550
350-550
OUTPUT CONNECTOR
JST SM02(8.0)B-BHS-1-TB
JST SM02(8.0)B-BHS-1-TB
Honda QZ-19-A3MYL #02
INVERTER MATES DIRECTLY
TO PANEL CONNECTORS
BHR-03VS-1
BHR-03VS-1
QZ-19-3F01
Copyright © 2000
Rev. 0.3,2001-01-18
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
1 page  
RangeMAX™
LXM1622-12-xx
DUAL 5W, DIGITAL DIMMING CCFL INVERTER MODULE
A MICROSEMI COMPANY
PRELIMINARY DATA SHEET
HIGHLIGHTS (CONTINUED)
• In applications with no access to a vertical sync, an onboard
oscillator operates the inverter burst rate at about 270Hz. 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.
BRITE
+12VDC
V IN VHI
LXM1622-12-xx
BRITE RTN
2.5 -
0
5V SLEEP VSYNC
GND
V SYNC
V
LO
Figure 5 - Brightness Control
• The Brightness control may be a voltage output DAC, or
other voltage source as shown in Figure 5. A 2.5V to 5V
Logic Level PWM signal from a micro-controller may
also be used as shown in Figure 5A.
• If synchronization to the video frame rate is desired,
connect the vertical sync pulse from the system video
controller to the VSYNC input. If no video synchronization
is desired, connect VSYNC to ground.
CC F • If you need to turn the inverter ON/OFF remotely, connect
TUB a 2.5V to 5V logic signal to the SLEEP input. If remote
ON/OFF is not needed, connect the SLEEP input to VIN or
other voltage source between 2.5V and 5V.
• 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
high voltage insulation, connect the longest wire to VLO.
This wire is typically white.
PW M Signal
from System
BRITE
P.W .
LXM1622-12-xx
1mS to 200µS
0 < P.W. < 100% of period
%& "
Also available in single lamp inverters LXM1612-xx-
xx, 5V dual LXM1622-05-xx and Quad Output
LXM1641-01 versions for multiple lamp applications.
Figure 5A - PW M Brightness Control
Copyright © 2000
Rev. 0.3,2001-01-18
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet LMX1622-12-03.PDF ] | |
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