Microsemi LX1692FIDW Tm full bridge resonant ccfl controller Datasheet

LX1692F
®
TM
Full Bridge Resonant CCFL Controller
P RODUCTION D ATA S HEET
KEY FEATURES
DESCRIPTION
The LX1692F regulates the CCFL
brightness in three ways: analog
dimming, digital dimming, or combined
analog and digital dimming methods
simultaneously to achieve the widest
dimming range (> 60 to 1).
The LX1692F can accept a
brightness control signal that is either
an analog voltage or a low frequency
PWM.
The
LX1692F
also
features
integrated gate drivers for the four
external power MOSFETs.
An integrated 4V LDO powering all
internal control circuitry greatly
simplifies supply voltage requirements.
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
WWW . Microsemi .C OM
Microsemi’s LX1692F is a cost
reduced, third generation CCFL (Cold
Cathode Fluorescent Lamp) controller.
The integrated controller is optimized
to drive CCFL’s using resonant full
bridge inverter topology.
Resonant full bridge topology
provides near sinusoidal waveforms
over a wide supply voltage range in
order to maximize the life of CCFL
lamps, control EMI emissions, and
maximize efficiency.
The LX1692F includes safety
features that limit the transformer
secondary voltage and protect against
fault conditions which include open
lamp, and broken lamp faults.
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
TA (°C)
-20 to +85
PW
Plastic TSSOP
20-Pin
DW
LX1692F
PACKAGE ORDER INFO
Plastic SOIC
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: 714-893-2570
Page 1
TM
®
Thank you for your interest in Microsemi® Analog Mixed Signal products.
The full data sheet for this device contains proprietary information.
To obtain a copy, please contact your local Microsemi sales representative. The
name of your local representative can be obtained at the following link
http://www.microsemi.com/contact/contactfind.asp
or
Contact us directly by sending an email to:
[email protected]
Be sure to specify the data sheet you are requesting and include your company
name and contact information and or vcard.
We look forward to hearing from you.
Copyright
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
WWW . Microsemi .C OM
INFORMATION
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