LT1768CGN
发布时间：2018/5/30
概述
The LT1768CGN 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 LT1768CGN 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.
The LT1768CGN is a current mode PWM controller with a 1.5A MOSFET driver for high power applications. It contains a 350kHz oscillator, 5V reference, and a current sense comparator with a 100mV threshold. It operates from an 8V to 24V input voltage. The LT1768CGN also has undervoltage lockout, thermal limit, and a shutdown pin that reduces supply current to 65μA. It is available in a small 16-lead SSOP package.
特点
Ultrawide Multimode Dimming? 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
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