DESCRIPTION

The LX1686E Backlight Controller IC provides all the control functions needed to implement Microsemi’s direct drive inverters used to operate cold cathode fluorescent lamps (CCFL’s). This IC can be used to control single or multiple-lamp configurations. CCFL’s are used for back or edge lighting of liquid crystal flat panel displays (LCD’s) and typically find application in notebook computers, web browsers, automotive and industrial instrumentation, and entertainment systems.

KEY FEATURES

◾ RangeMAX™ Wide Range Dimming (>100:1)

◾ Synchronizable to Display Video Frequency

◾ High Voltage Feedback Loop Directly Controls Maximum Open Lamp

◾ Micro-Amp Sleep Mode

◾ User Programmable Fixed Frequency Operation

◾ Under-Voltage Lockout Feature With Power-Up Reset

◾ Built-In Soft-Start Feature

◾ Operates With 3.3V or 5V power Supplies

◾ 100mA Output Drive Capability

APPLICATIONS

◾ Notebooks

◾ Instrumentation Display

◾ Desktop Computer Monitors

◾ Low Ambient Light Displays (used in Aircraft, Automobiles, and Hand-Held Equipment)

BENEFITS

◾ Extremely High Efficiency From 3.3V to 5V Power Supplies

◾ Lower Cost Than Conventional Buck / Royer Inverter Topologies

◾ Improved Lamp Strike Capability

◾ Improved Over-Voltage Control