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PDF LX1692A Data sheet ( Hoja de datos )
| Número de pieza | LX1692A | |
| Descripción | Full Bridge Resonant CCFL Controller | |
| Fabricantes | Microsemi Corporation | |
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TM
LX1692A
® Full Bridge Resonant CCFL Controller
PRODUCTION DATA SHEET
DESCRIPTION
Microsemi’s LX1692A is a cost The LX1692A regulates the CCFL
reduced, third generation Direct Drive brightness in three ways: analog
CCFL (Cold Cathode Fluorescent dimming, digital dimming, or combined
Lamp) controller. The integrated analog and digital dimming methods
controller is optimized to drive simultaneously to achieve the widest
CCFL’s using resonant full bridge dimming range (> 60 to 1).
inverter topology.
The LX1692A can accept a
Resonant full bridge topology brightness control signal that is either
provides near sinusoidal waveforms an analog voltage or a direct low
over a wide supply voltage range in frequency PWM.
order to maximize the life of CCFL The LX1692A also features
lamps, control EMI emissions, and integrated gate drivers for the four
maximize efficiency. This new archi- external power MOSFETs.
tecture also provides a wide dimming An integrated 4V LDO powers all
range.
internal control circuitry greatly
The LX1692A includes safety simplifying supply voltage require-
features that limit the transformer ments.
secondary voltage and protect against The LX1692A is available in a 20-
fault conditions which include open Pin TSSOP.
lamp, broken lamp and short-circuit
faults.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Protected by U.S. Patents: 5,615,093; 5,923,129; 5,930,121; 6,198,234; Patents Pending
KEY FEATURES
For Wide Voltage Range Inverter
Application (7V to 22V)
Patent resonant strike for
unsurpassed striking power
combined with best efficiency
Low Stress to transformers
Excellent open circuit voltage
regulation reduces transformer
breakdown voltage requirements
while striking higher voltage
lamps
One inverter for multiple panel
types
Wide Dimming Range
Analog Dimming: >3 to 1
Digital Dimming : >20 to 1
Combined: >60 to 1
Fool-Proof Striking
Programmable Burst Dimming
Frequency
Programmable Time Out
Protection
Fixed Operating Frequency
Open lamp voltage protection,
Short lamp protection, Arc
Protection1
Compatible with Existing
Transformers
BENEFITS
Even Display Light Distribution
Longer Lamp Life with Optimized
Lamp Current Amplitude
Reduced Operating Voltage
Lowers Corona Discharge and
Prolongs Module Life
High “Nits / Watt” Efficiency
Makes Less Heat and Brighter
Displays
APPLICATIONS
Notebook PC
PACKAGE ORDER INFO
TA (°C)
-20 to +85
Plastic TSSOP
PW 20-Pin
RoHS Compliant / Pb-free
LX1692AIPW
Note: Available in Tape & Reel. Append the letters “TR” to the
part number. (i.e. LX1692AIPW-TR)
1 Arc protection is provided if the arcing level is enough to be trigged.
Copyright © 2004
Rev. 1.1, 2/27/2006
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
1 page | ||
| Páginas | Total 2 Páginas | |
| PDF Descargar | [ Datasheet LX1692A.PDF ] | |
Hoja de datos destacado
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