Microsemi

Analog Mixed Signal Group

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

Page 1

Copyright

© 2010

Rev. 1.0, 2010-12-23

R

™

LXMG1645-12-5x

12V Quad 5W CCFL Inverter Module

TM

®

DESCRIPTION

The LXMG1645-12-51 and LXMG1645-

12-52 are Quad 5W Output CCFL (Cold

Cathode

Fluorescent

Lamp)

Inverter

Modules specifically designed for driving

15” to 18”quad lamp LCD panels.

The inverters include two dimming

inputs

that

provide

brightness

control,

V_BRITE and P_BRITE.

A voltage on

V_BRITE pin adjusts the lamp current

amplitude with 0V providing maximum

brightness.

The P_BRITE input accepts a

low frequency PWM signal which directly

controls the lamp drive waveform.

This

PWM

RangeMAX™

Digital

Dimming

Technique provides flicker-free brightness

control over a wide range (typically 50:1+).

The

maximum

output

current

is

range of 6mA to 7.5mA in 0.5mA steps.

This allows the inverter to be properly

matched to a wide array of LCD panel

lamp current specifications, a function

which we call PanelMatch™.

In

addition

the

inverter

has

a

dedicated V_STATUS pin that indicates a

fault has occurred such as an open or

shorted lamp. V_STATUS is an open

drain configuration whose output is low

during normal operation.

When one or

more lamps sustain a fault the other

lamp(s) will continue to operate and the

V_STATUS pin will toggle high.

This

mode of operation during lamp(s) failure

is called StayLIT™ since the panel is able

to still remain on although at reduced

brightness.

Other benefits of this new topology

are stable fixed-frequency operation and

secondary-side strike-voltage regulation.

Protected By U.S. Patents: 5,923,129; 5,930,121; 6,198,234; Patents Pending

KEY FEA T URES

StayLIT™ Redundancy

PanelMatch™ Adjustable

Output Current

V_STATUS Fault Output

Dual Brightness Control Inputs

RangeMAX™ Wide Range

Dimming

Output Short-Circuit Protection

and Automatic Strike-Voltage

Regulation

Fixed Frequency Operation

Rated From -30 to 80°C

UL 60950 Pending

RoHS Compliant

APPLICA T IONS

High Brightness Displays

Desktop Displays

Medical Monitors

BENEFITS

Smooth, Flicker Free 10-

100% Full-Range Brightness

Control

PRODUCT HIGHLIG HT

LXMG1645-12-51

HI

HI

Lamp Current Programmable from 6mA to 7.5mA per Lamp in 0.5mA Steps

Lamp Fault Signal

HI

HI

PACKAGE ORDER INFO

TO

LXMG1645-12-51

Four JST SM02(8.0) B-BHS-1-TB(LF)(SN) or Yeon Ho 20015WR-05A00

or equivalent connectors

JST BHR-03VS-1 or

equivalent connectors

LXMG1645-12-52

Four JST SM02B-BHSS-1-TB(LF)(SN) or Yeon Ho 35001WR-02A00 or

equivalent connectors

JST BHSR-02VS-1 or

equivalent connectors