描述 Description

The LX1689 is the latest generation of Direct Drive CCFL (Cold Cathode Fluorescent Lamp) Controller family. 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. The on-chip PLL circuit used to synchronize the digital dimming burst frequency to the video frame rate is replaced with a programmable counter that divides video controller horizontal sync pulse to generate the burst frequency. The reverse polarity brightness control is retained, but only if using the analog dimming mode. Features: 2.8 to 28 Volt Single Supply Operating Range Selectable Analog/Digital Dimming Modes Digital Dimming Can Synch to External Or Internal Clocks User Programmable Digital Dimming Burst Frequency 150 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??ROHS, PB Free