DESCRIPTION

The LX1689 is the latest generation Direct Drive CCFL (Cold Cathode Fluorescent Lamp) Controller. It uses new circuit design techniques (patents pending) and combines digital and linear circuits with an advanced BiCMOS process to create a more complete controller in a small package.

When compared to the original LX1686 design, identical module applications use from 12 to 30 less components. New functions and enhancements have been added to make the LX1689 even easier to use.

KEY FEATURES

◾ 3 to 28 Volt Single Fixed (±20) Supply Operating Range

◾ Selectable Analog/Digital Dimming Modes

◾ Digital Dimming Can Synch to External Or Internal Clocks

◾ User Programmable Digital Dimming Burst Frequency

◾ 252 mS Power On Delay

◾ Flexible Lamp Current Compensation Input

◾ Open Lamp Shutdown and Fault Output Indicator

◾ “On Chip” Full Wave Lamp Current & Voltage Rectifiers

◾ 20 Pin TSSOP Package

BENEFITS

◾ Low Component Count / Module Cost / Size

◾ High “Nits/Watt” Efficiency

◾ Operates Directly From 1 to 6 Li_Ion Cells

◾ Lamp Current Compensation Input Makes Indoor/Outdoor And Wide Temperature Range Applications Easy to Design