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

产品特点 Features

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

参数

应用

PDAs
Handheld Computers
Portable Instruments
Handheld GPS with Map Display
Handheld TV/Video Monitor

典型应用图

LTC1697 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC1697EMS	MSOP	10	E	$2.79	$1.95
LTC1697EMS#PBF	MSOP	10	E	$2.79	$1.95
LTC1697EMS#TR	MSOP	10	E		$2.00
LTC1697EMS#TRPBF	MSOP	10	E		$2.00

LTC1697 数据手册及相关资料下载

数据手册(英文) : LTC1697 - High Efficiency Low Power 1W CCFL Switching Regulator.PDF
设计要点 (英文) : DN1004 - An Efficient and Low Cost Alternative to LEDs for Backlighting Handheld Computer Displays.PDF
可靠性数据 : R415 Reliability Data .PDF