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LTC1697 - High Efficiency Low Power 1W CCFL Switching Regulator

The LTC®1697 is designed to control a single 1W cold cathode fluorescent lamp (CCFL). An internal PWM dimming system maximizes efficiency and dimming range. Accurate lamp currents can be set with a single external resistor.

The LTC1697 includes a synchronous current mode PWM controller with internal 1A MOSFET switches. It contains a 300kHz oscillator, 0.8V reference, and internal current sense. It operates from a 2.8V to 5.5V input voltage. The LTC1697 also has a thermal limit and a shutdown that reduces supply current to <2µA.

The LTC1697 is available in the MSOP-10 package.

特点 Operates from Single Li-Ion Battery 2.8V to 5.5V Input Voltage Range Very Low Shutdown Current: <2µA Synchronous Buck Architecture for High Efficiency PWM Dimming Frequency Adjustable with a Single Capacitor Accurate Lamp Current Maximizes Lamp Lifetime Fixed Frequency Operation at 300kHz Internal or External PWM Dimming Small 10-Pin MSOP Package 典型应用

应用 PDAs Handheld Computers Portable Instruments Handheld GPS with Map Display Handheld TV/Video Monitor 封装信息

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