LTC1697 datasheet(1/8 Pages) LINER

부품명	LTC1697

상세설명	High Efficiency Low Power 1W CCFL Switching Regulator

PDF	8 Pages

Scroll/Zoom	100%

제조업체	LINER [Linear Technology]

홈페이지	http://www.linear.com

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1 / 8 page

LTC1697

1

1697f

■ PDAs

■ Handheld Computers

■ Portable Instruments

■ Handheld GPS with Map Display

■ Handheld TV/Video Monitor

■ 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

The LTC

®1697 is designed to control a single 1W cold

cathode fluorescent lamp (CCFL). An internal PWM dim-

ming 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.

APPLICATIO S

FEATURES

TYPICAL APPLICATIO

DESCRIPTIO

High Efficiency Low Power

1W CCFL Switching Regulator

, LTC and LT are registered trademarks of Linear Technology Corporation.

8.25k

0.1µF

0.022µF

10µF

330Ω

65

110

2

3

4

0.15µF

33µH

CCFL

LAMP

200k

VIN

2.8V TO 5.5V

DIMMING INPUT

1V(0%) – 2V(100%)

Li-Ion

CELL

1697 TA01

27pF

1kV

+

OFF ON

VIN SW 0VSEN

SHDN

VDIM

CDIM

RPROG

LAMP

VC

LTC1697

GND

RPROG (Ω)

4k

10k

20k

6k

8k

3

2

4

5

6

7

9

8

10

1967 TA01b

ICCFL vs RPROG

Protected by U.S. Patent 6522116.

유사한 부품 번호 - LTC1697

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Linear Technology	LTC1697	103Kb / 8P	High Efficiency Low Power 1W CCFL Switching Regulator
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LTC1697 데이터시트(PDF) 1 Page - Linear Technology

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