OZ9939IGN Datasheet PDF - O2Micro International

GENERAL DESCRIPTION
The OZ9939 is a high performance, cost-effective CCFL (Cold Cathode Fluorescent Lamp) controller designed for driving large-size Liquid Crystal Display (LCD) applications requiring 2 to
6 CCFLs.

FEATURES
• Negative PWM dimming polarity
• Constant operating frequency
• Drives positive/negative-impedance lamps during ignition
• High drive current for external MOSFETs
• User-defined ignition time and shutdown delay time
• Multiple mode dimming control
• Built-in intelligence for ignition and normal operation of CCFLs
• Built-in open-lamp protection and over voltage protection for backlight system
• Optimized soft-start function