LX1695IDM MICROSEMI [Microsemi Corporation], LX1695IDM Datasheet

LX1695IDM

Manufacturer Part Number

LX1695IDM

Description

Switched Royer CCFL Inverter Monitor IC

Manufacturer

MICROSEMI [Microsemi Corporation]

Datasheet

1.LX1695IDM.pdf (10 pages)

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Rev. 1.0a, 2006-01-06

supervisory functions for switched

Royer CCFL inverter modules used in

single or multiple lamp desktop

monitors and LCD TV sets.

integrates a PWM that generates

digital (burst mode) dimming from a

DC brightness control input, and a

protection circuit that shuts off the

Royer oscillator if lamp ignition does

not occur in a timely manner, or in the

event of one or more open lamps.

Strike and initial open lamp timeout is

user programmable with an external

RC,

programmable with a single external

resistor.

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

BRITE_IN

The LX1695 is a general purpose

External CLK Override

allows Syncronization

ENABLE

Logic High Enable

Duty Cycle Control

0 to 2V = 3% to 100%

30 to 600 Hertz x 512

OPTIONAL

and

PWM

generator

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

frequency

Single Resistor sets

Programmable Clock Frequency

Programmable lamp

strike interval at

power on or enable

D E S C R I P T I O N

DIM_FREQ

ENABLE

FLT_DLY

BRITE_IN

Wide Range Dimming For a Fixed Royer Inverter

-40 to 85

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

RoHS compliant.

LX1695

with

(°C)

LX1695IDM-TR)

ROYER

OLSNS

an external clock signal to program

and/or synchronize the Royer output

frequency.

under-voltage lockout and a logical

ENABLE input that permits shutting

down the Royer inverter(s) remotely

without removing their power. A single

output pin can be expanded with

external transistors to drive any number

of Royer circuits, giving a single device

the ability to control very large displays

for LCD TV applications or single lamp

panels in notebooks and web tablets.

The device is available in either an 8

pin plastic DIP or SOIC package.

GND

VDD

The DIM_FREQ pin can also accept

This low cost eight pin IC includes

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

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

Integrated Products Division

Royer Bias Drive 30 to 600 Hertz

Open Lamp Detection Input

Gated for Royer High

Microsemi

RoHS / Pb-free

LX1695IM

Fixed Input

Supply 4.5 to 5.5V

Plastic DIP

8-Pin

VDD

Switched Royer CCFL Inverter Monitor IC

RoHS / Pb-free

LX1695IDM

RODUCTION

Royer Inverter

8-Pin

Plastic SOIC

A P P L I C A T I O N S / B E N E F I T S

Single Resistor Programs

Output Frequency

Allows External Synchronized

PWM

Open Lamp Sense Protection

Programmable Fault Delay

Enable and UV Lockout

Preset 3.125% Minimum

Output Duty Cycle

DC to PWM Generator

Single or Multi Lamp Designs

Desktop Monitors

LCD TV

Industrial Displays

ATA

K E Y F E A T U R E S

HEET

LX1695

Page 1

Related parts for LX1695IDM

LX1695IDM Summary of contents

Page 1

... Programmable Fault Delay Enable and UV Lockout Preset 3.125% Minimum Output Duty Cycle PWM Generator Single or Multi Lamp Designs Desktop Monitors LCD TV Industrial Displays Royer Inverter Plastic SOIC 8-Pin RoHS / Pb-free LX1695IDM Page 1 ...

Page 2

Supply Voltage (V ) ........................................................................................6V DD Inputs (BRITE_IN, OLSNS, FLT_DLY, ENABLE, DIM_FREQ)................. V Output Current (ROYER) ...........................................................................150mA ...

Page 3

Parameter Supply Voltage ( BRITE Linear DC ...

Page 4

TM ENABLE Enable Ignore_OLSNS OLSNS 3V 9 Bit Dual Ramp Clock DAC BRITE_IN VDD FAULT_ DLY 2.1V 1V DIM_FREQ Copyright © 2004 Rev. 1.0a, 2006-01-06 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Switched Royer CCFL Inverter Monitor ...

Page 5

TM CN1 VIN GND +5V ENABLE BRITE_IN LX1695 Circuit Approximate 6300 Ω DIM FREQ = [Hz 24. DIM_FREQ 2 Enable ENA +5V R5 2.2M 3 FLT_DLY C5 4 1µF BRITE_IN LX1695 VINS Q3 ...

Page 6

PWM IGITAL IMMING A DC voltage to PWM converter provides an accurate digital dimming brightness control by varying Royer on time from 100 low as 3.125%. Minimum duty cycle is implemented by causing the Royer ...

Page 7

1000 100 RDIM_FREQ (k Ohms ...

Page 8

TM RAMP ROYER V BRITE_IN = 2.0V VBRITE_IN = 1.5V V BRITE_IN = 0.75V V BRITE_IN < 0V Copyright © 2004 Rev. 1.0a, 2006-01-06 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Switched Royer CCFL Inverter Monitor IC ...

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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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