DESCRIPTION

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.

KEY FEATURES

◾ 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