lx1691a Microsemi Corporation, lx1691a Datasheet

lx1691a

Manufacturer Part Number

lx1691a

Description

Enhanced Multi-mode Ccfl Controller

Manufacturer

Microsemi Corporation

Datasheet

1.LX1691A.pdf (2 pages)

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Current page: 1 of 2
Download datasheet (109Kb)

Rev. 1.1b, 8/30/2006

enhanced Direct Drive CCFL (Cold

Cathode Fluorescent Lamp) Controller.

Its architecture is based on the LX1691.

be designed for virtually any CCFL

appliance from digital cameras and

PDA’s to big screen monitors and driver

viewable automotive displays.

accept digital and analog control inputs

and provides six different dimming

modes that control both lamp current

amplitude and duty cycle, either simul-

taneously or separately. Designers can

select normal or reverse polarity dimming

and precisely program mini-mum and

maximum lamp currents with resistors.

is enhanced to include regulation and

shutdown for over voltage and over

current conditions.

proven and patented strike method that

allows significant efficiency gains while

guaranteeing strong striking power at all

operating temperatures.

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

Mircrosemi’s

LX1691A based inverter modules can

New versatile dimming circuitry can

The LX1691A fault shutdown feature

The LX1691A includes the Microsemi

Traditional Analog

Internal Digital

LX1691A

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

T = 512 / Lamp Frequency

-40 to +85

Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1691AIPW-TR)

BRITE_IN

D E S C R I P T I O N

DD_CLK

(°C)

+3V

Four of Six Dimming Modes

smoothly up to the unloaded resonant

frequency of the lamp and high voltage

transformer.

LX1691A’s active high output voltage

regulation, produces just enough strike

voltage without generating unpredictable

high voltage spikes that cause arcing and

component failures. Competitive devices

that simply switch to a higher frequency

for striking do not have this “real time”

control over output voltage, and require

much more attention to transformer

design.

input voltage applications. It is identical

to the LX1691 except it has a guaranteed

minimum lamp strike interval of one

second to meet notebook and monitor

panel manufacturer’s specifications. The

LX1691A

compensation that provides improved

regulation and transient response over an

7 – 24 volt input supply range.

LX1691A can also be used with a fixed

input

performance equal to that of the

LX1691.

Our method sweeps strike frequency

The LX1691A is optimized for wide

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

Lamp Current (mA)

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

2.8V

supply

Integrated Products

http://www.microsemi.com

Microsemi

DDP

includes

This, coupled with the

and

External Digital

Direct PWM (Analog)

Enhanced Multi-Mode CCFL Controller

feed

will

5.5V

T = 512 / DD_CLK Frequency

DDP

produce

forward

BRITE_IN

The

DD_CLK

RODUCTION

RoHS Compliant / Pb-free

LX1691AIPW

Plastic TSSOP

16-PIN

Low Component Count / Module

High “Nits/Watt” Efficiency

Operates Directly From a Single

Industries Safest And Highest

Tight Operating Frequency

Simultaneous Amplitude And

Duty Cycle Dimming Modes

Resistor programmable min and

max lamp currents

Digital Dimming Can Synch To

External Or Internal Clocks

120 ms Power On Delay

Open Or Shorted Lamp

Regulation & Shutdown

“On Chip” Full Wave Lamp

Current Rectifier

16 Pin TSSOP Package

Very Stable Oscillator with On-

Chip timing capacitor

Enhanced Digital Dimming

Resolution

Wide Input Voltage Capable

Cost / And Size

Li-Ion Cell

Performing Strike Voltage

Generation (Patented)

Tolerance For Easier System

Level RFI Control

Lamp Current (mA)

ATA

K E Y F E A T U R E S

B E N E F I T S

HEET

LX1691A

Page 1

Related parts for lx1691a

lx1691a Summary of contents

Page 1

... DD_CLK 512 / Lamp Frequency T (°C) A -40 to +85 Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1691AIPW-TR) Copyright © 2003 Rev. 1.1b, 8/30/2006 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Enhanced Multi-Mode CCFL Controller ® an ...

Page 2

... To obtain a copy, please contact your local Microsemi sales representative. The name of your local representative can be obtained at the following link http://www.microsemi.com/contact/contactfind.asp or Contact us directly by sending an email to: IPGdatasheets@microsemi.com Be sure to specify the data sheet you are requesting and include your company name and contact information and or vcard. We look forward to hearing from you. Copyright 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® ...

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