LT1768C 数据手册 ( 数据表 ) - Linear Technology

DESCRIPTION
The LT®1768 is designed to control single or multiple cold cathode fluorescent lamp (CCFL) displays. A unique Multimode Dimming scheme* combines both linear and PWM control functions to maximize lamp life, efficiency, and dimming range. Accurate maximum and minimum lamp currents can be easily set. The LT1768 can detect and protect against lamp failures and overvoltage start-up conditions. It is designed to provide maximum flexibility with a minimum number of external components.

FEATURES
■ Ultrawide Multimode DimmingTM Range
■ Multiple Lamp Capability
■ Programmable PWM Dimming Range and Frequency
■ Precision Maximum and Minimum Lamp Currents Maximize Lamp Lifetime
■ No Lamp Flicker Under All Supply and Load Conditions
■ Open Lamp Detection and Protection
■ 350kHz Switching Frequency
■ 1.5A MOSFET Gate Driver
■ 100mV Current Sense Threshold
■ 5V Reference Voltage Output
■ The 16-Lead SSOP Package

APPLICATIONS
■ Desktop Flat Panel Displays
■ Multiple Lamp Displays
■ Notebook LCD Displays
■ Point of Sale Terminal Displays