LX1692F Datasheet, PDF (1/2 Pages) Microsemi Corporation – TM Full Bridge Resonant CCFL Controller

LX1692F
TM
®
Full Bridge Resonant CCFL Controller
PRODUCTION DATA SHEET
DESCRIPTION
Microsemi’s LX1692F is a cost The LX1692F regulates the CCFL
reduced, third generation CCFL (Cold brightness in three ways: analog
Cathode Fluorescent Lamp) controller. dimming, digital dimming, or combined
The integrated controller is optimized analog and digital dimming methods
to drive CCFL’s using resonant full simultaneously to achieve the widest
bridge inverter topology.
dimming range (> 60 to 1).
Resonant full bridge topology The LX1692F can accept a
provides near sinusoidal waveforms brightness control signal that is either
over a wide supply voltage range in an analog voltage or a low frequency
order to maximize the life of CCFL PWM.
lamps, control EMI emissions, and The LX1692F also features
maximize efficiency.
integrated gate drivers for the four
The LX1692F includes safety external power MOSFETs.
features that limit the transformer An integrated 4V LDO powering all
secondary voltage and protect against internal control circuitry greatly
fault conditions which include open simplifies supply voltage requirements.
lamp, and broken lamp faults.
The LX1692F is available in either a
20-Pin TSSOP or SOIC package.
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; 7,112,929; Patents Pending
PRODUCT HIGHLIGHT
KEY FEATURES
ƒ Low Stress to Transformers
ƒ Wide Dimming Range
Analog Dimming: > 3 to 1
Digital Dimming : > 20 to 1
Combined: > 60 to 1
ƒ Programmable Burst Dimming
Frequency
ƒ Programmable Time-Out
Protection
ƒ Fixed Operating Frequency
ƒ Open-Lamp Voltage Protection
ƒ Soft Rise/Fall Burst Dimming
Control
ƒ 3% Tolerance Brightness
Reference Voltage
BENEFITS
ƒ Even Display Light Distribution
ƒ Longer Lamp Life with Optimized
Lamp Current Amplitude
ƒ Reduced Operating Voltage
Lowers Corona Discharge and
Prolongs Inverter Life
ƒ High “Nits / Watt” Efficiency
Makes Less Heat and Brighter
Displays
APPLICATIONS
ƒ LCD TV
ƒ LCD Monitor
T_A (°C)
-20 to +85
PACKAGE ORDER INFO
Plastic TSSOP
PW 20-Pin
Plastic SOIC
DW 20-Pin
RoHS Compliant / Pb-free
RoHS Compliant / Pb-free
LX1692FIPW
LX1692FIDW
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1692FIPW-TR)
Copyright © 2008
Rev. 1.0, 8/28/2008
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
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