LX1695 Datasheet | Microsemi

.. TM ® Switched Royer CCFL Inverter Monitor IC P RODUCTION D ATA S HEET DESCRIPTION KEY Features . Microsemi . C OM The LX1695 is a general purpose DC to PWM generator with supervisory functions for switched Royer CCFL inverter modules used in single or multiple lamp desktop monitors and LCD TV sets. It integrates a PWM that generates digital (burst mode) dimming from a DC brightness control input, and a protection circuit that shuts off the Royer oscillator if lamp ignition does not occur in a timely manner, or in the event of one or more open lamps. Strike and initial open lamp timeout is user programmable with an external RC, and PWM frequency is programmable with a single external resistor. The DIM_FREQ pin can also accept an external clock signal to program and/or synchronize the Royer output frequency. This low cost eight pin IC includes under-voltage lockout and a logical ENABLE input that permits shutting down the Royer inverter(s) remotely without removing their power. A single output pin can be expanded with external transistors to drive any number of Royer circuits, giving a single device the ability to control very large displays for LCD TV applications or single lamp panels in notebooks and web tablets. The device is available in either an 8 pin plastic DIP or SOIC package. - - - - - - Single Resistor Programs Output Frequency Allows External Synchronized PWM Open Lamp Sense Protection Programmable Fault Delay Enable and UV Lockout Preset 3.125% Minimum Output Duty Cycle APPLICATIONS/BENEFITS - - - - - DC to PWM Generator Single or Multi Lamp Designs Desktop Monitors LCD TV Industrial Displays IMPORTANT: For the most current data, consult MICROSEMI’s website: PRODUCT HIGHLIGHT Wide Range Dimming For a Fixed Royer Inverter External CLK Override allows Syncronization Single Resistor sets Programmable Clock Frequency 30 to 600 Hertz x 512 OPTIONAL DIM_FREQ OLSNS GND ROYER VDD Open Lamp Detection Input Gated...