LX1686ECPW Microsemi Analog Mixed Signal Group, LX1686ECPW Datasheet

LX1686ECPW

Manufacturer Part Number

LX1686ECPW

Description

IC CTRLR CCFL BACKLIGHT 24TSSOP

Manufacturer

Microsemi Analog Mixed Signal Group

Type

CCFL Controllerr

Datasheet

1.LX1686ECPW.pdf (8 pages)

Specifications of LX1686ECPW

Current - Supply

5mA

Voltage - Supply

3 V ~ 5.5 V

Operating Temperature

0°C ~ 85°C

Package / Case

24-TSSOP

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current - Output

Frequency

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

H&T Electronics

Part Number:

LX1686ECPW-TR

Quantity:

4 404

Current page: 1 of 8
Download datasheet (144Kb)

Rev. 1.1, 2006-02-27

IMPORTANT: For the most current data, consult MICROSEMI’s website:

Protected by U.S. Patents 5,615,093; 5,923,129; 5,930,121; 6,198,234; Patents Pending

IC provides all the control functions

needed to implement Microsemi’s

direct drive inverters used to operate

cold

(CCFL’s).

control

configurations. CCFL’s are used for

back or edge lighting of liquid crystal

flat panel displays (LCD’s) and

typically find application in notebook

computers, web browsers, automotive

and industrial instrumentation, and

entertainment systems.

controlled lamp current burst circuit

that can provide a > 100:1 dimming

range from a simple zero to 2.5V

potentiometer input.

dimming

synchronized to the LCD panel’s frame

rate to prevent interference from

optical beat frequencies.

The LX1686E Backlight Controller

The LX1686E

cathode

single

burst

This IC can be used to

fluorescent

includes a PWM

rate

-40 to 85

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Standard Analog

Dimming Inverter

0 to 85

P R O D U C T H I G H L I G H T

Light Output (Nits)

multiple-lamp

(°C)

The PWM

D E S C R I P T I O N

lamps

easily

Microsemi's

RangeMAX

a new dual feedback control loop that

permits regulation of maximum lamp

strike voltage as well as lamp current.

Regulating maximum lamp voltage

permits the designer to provide for

ample worst case lamp strike voltage

while at the same time conservatively

limit maximum open circuit voltage.

generation

module designer to optimize high

voltage

maximum operating efficiency with no

power dissipating overhead to guarantee

strike capability

resonant, oscillator-controlled PWM

regulation method.

allows a wide choice of fixed operating

frequencies to match lamp current

frequency to the lamp’s most efficient

operating point, and to minimize high

frequency interference.

RoHS compliant / Pb-free

Safety and reliability features include

An innovative new strike voltage

Direct drive topology is a non-

Plastic TSSOP

24-PIN

P A C K A G E O R D E R I N F O

LX1686ECPW

LX1686EIPW

Integrated Products

Microsemi

http://www.microsemi.com

transformer

technique

105

Light emitted by a CCFL is proportional to the current flowing through it.

There are two ways to control the current: by adjusting the amplitude of a

continuous AC current; or, as with RangeMAX technology, by varying the

amount of time a burst of full current is present. RangeMAX technology

frees the backlight inverter module designer to operate in a lower

brightness and lower power consumption mode than is possible with

conventional amplitude control methods.

The LX1686E

Digital Dimming CCFL Controller IC

enables

design

Note: Available in Tape & Reel. Append the

letters “TR” to the part number. (i.e.

LX1686ECPW-TR)

RODUCTION

the

for

RangeMAX™ Wide Range

Dimming (>100:1)

Synchronizable to Display Video

Frequency

High Voltage Feedback Loop

Directly Controls Maximum Open

Lamp

Micro-Amp Sleep Mode

User Programmable Fixed

Frequency Operation

Under-Voltage Lockout Feature

With Power-Up Reset

Built-In Soft-Start Feature

Operates With 3.3V or 5V power

Supplies

100mA Output Drive Capability

Notebooks

Instrumentation Display

Desktop Computer Monitors

Low Ambient Light Displays

(used in Aircraft, Automobiles,

and Hand-Held Equipment)

Extremely High Efficiency From

3.3V to 5V Power Supplies

Lower Cost Than Conventional

Buck / Royer Inverter Topologies

Improved Lamp Strike Capability

Improved Over-Voltage Control

ATA SHEET

K E Y F E A T U R E S

A P P L I C A T I O N S

B E N E F I T S

LX1686E

Page 1

Related parts for LX1686ECPW

LX1686ECPW Summary of contents

Page 1

... Plastic TSSOP PW 24-PIN Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. RoHS compliant / Pb-free LX1686ECPW-TR) LX1686ECPW LX1686EIPW Microsemi Integrated Products LX1686E D RODUCTION ATA SHEET RangeMAX™ Wide Range Dimming (>100:1) Synchronizable to Display Video ...

Page 2

Supply Voltage (VDD VDD_P) .................................................................................. 6.5V , Digital Inputs ........................................................................................ -0.3 to VDD +0.5V Analog Inputs........................................................................................ -0.3 ...

Page 3

AME AOUT Output driver A, typical 10K pull down resistor to VSS_P. VSS_P Power ground for output drivers only. VSS Signal ground. Connects to an external capacitor, C AFD_C 50% of the maximum VCO frequency. Forcing ...

Page 4

TM Unless otherwise specified, the following specifications apply over the operating ambient temperature -0°C ≤ ≤ CPW and -40°C T 85°C for the LX1686E IPW except where otherwise noted. Test conditions: VDD = VDD_P = 3.0 to 5.5V ...

Page 5

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TM PW 24-Pin Thin Small Shrink Outline (TSSOP SEATING PLANE B G Copyright © 2004 Rev. 1.1, 2006-02-27 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Digital Dimming ...

Page 8

TM PRODUCTION DATA – Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not ...

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