LX1695 Datasheet, PDF (1/10 Pages) Microsemi Corporation – Switched Royer CCFL Inverter Monitor IC

LX1695
TM
®
Switched Royer CCFL Inverter Monitor IC
PRODUCTION DATA SHEET
DESCRIPTION
The LX1695 is a general purpose The DIM_FREQ pin can also accept
DC to PWM generator with an external clock signal to program
supervisory functions for switched and/or synchronize the Royer output
Royer CCFL inverter modules used in frequency.
single or multiple lamp desktop This low cost eight pin IC includes
monitors and LCD TV sets. It under-voltage lockout and a logical
integrates a PWM that generates ENABLE input that permits shutting
digital (burst mode) dimming from a down the Royer inverter(s) remotely
DC brightness control input, and a without removing their power. A single
protection circuit that shuts off the output pin can be expanded with
Royer oscillator if lamp ignition does external transistors to drive any number
not occur in a timely manner, or in the of Royer circuits, giving a single device
event of one or more open lamps. the ability to control very large displays
Strike and initial open lamp timeout is for LCD TV applications or single lamp
user programmable with an external panels in notebooks and web tablets.
RC, and PWM frequency is The device is available in either an 8
programmable with a single external pin plastic DIP or SOIC package.
resistor.
IMPORTANT: For the most current data, consult MICROSEMI’s website:
KEY FEATURES
ƒ Single Resistor Programs
Output Frequency
ƒ Allows External Synchronized
PWM
ƒ Open Lamp Sense Protection
ƒ Programmable Fault Delay
ƒ Enable and UV Lockout
ƒ Preset 3.125% Minimum
Output Duty Cycle
APPLICATIONS/BENEFITS
ƒ DC to PWM Generator
ƒ Single or Multi Lamp Designs
ƒ Desktop Monitors
ƒ LCD TV
ƒ Industrial Displays
PRODUCT HIGHLIGHT
External CLK Override
allows Syncronization
Wide Range Dimming For a Fixed Royer Inverter
Single Resistor sets
Programmable Clock Frequency
30 to 600 Hertz x 512
OPTIONAL
ENABLE
Logic High Enable
BRITE_IN
Duty Cycle Control
0 to 2V = 3% to 100%
DIM_FREQ OLSNS
ENABLE
GND
LX1695
FLT_DLY ROYER
BRITE_IN
VDD
Open Lamp Detection Input
Gated for Royer High
Royer Bias Drive 30 to 600 Hertz
Royer Inverter
VDD
Fixed Input
Supply 4.5 to 5.5V
Programmable lamp
strike interval at
power on or enable
Copyright © 2004
Rev. 1.0a, 2006-01-06
T_J (°C)
-40 to 85
PACKAGE ORDER INFO
Plastic DIP
Plastic SOIC
M _8-Pin
DM _8-Pin
RoHS / Pb-free
RoHS / Pb-free
LX1695IM
LX1695IDM
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e.
LX1695IDM-TR)
RoHS compliant.
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
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