Microsemi LXMG1626-12-45 Technical data

PanelMatch™ StayLit™ LXMG1626-12-45

TM

The LXMG1626-12-45 is a Dual 6W
Output Direct Drive™ CCFL (Cold
Cathode Fluorescent Lamp) Inverter
Module specifically designed to be
compatible with variety of LCD panels

DESCRIPTION

lamps in the LCD fails open, the second
lamp will continue to operate with a
FAULT signal toggling to indicate the

failed condition, StayLit™ feature.
that have both lamps on one side of the
panel and use a single common lamp
return wire.

LXMG1626 modules provide the

Technique provides flicker-free brightness

control in any wide range (typically

100:1+) dimming application.
designer with a superior display brightness
range. This brightness range is achievable
with virtually any LCD display.

The modules are available with a
dimming input that permits brightness
control from either, a DC voltage source,

energizes the lamp is designed
specifically to ensure that no premature
lamp degradation occurs, while allowing
significant power savings at lower dim
levels.

a PWM signal or external potentiometer.

The maximum output current is
externally programmable (through the
input connector) at either 10mA or 12mA
(5mA or 6mA per lamp). This allows the
inverter to match the panel’s lamp current
specifications, or it can be used to

highly integrated LX1691B backlight
controller to convert DC voltage from the
system battery or AC adapter directly to
high frequency, high-voltage waves
required to ignite and operate CCFL

lamps.
purposely drive the lamps at a lower or
higher current to decrease or increase
nominal brightness. The inverter also has
a dedicated FAULT pin that indicates an
open/shorted lamp condition.

IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Protected By U.S. Patents: 5,923,129; 5,930,121; 6,198,234; Patents Pending

are stable fixed-frequency operation,

secondary-side strike-voltage regulation

and both open/shorted lamp protection

with fault timeout.

®

In addition when only one of the two

The RangeMAX™ Digital Dimming

The resultant “burst drive” that

The design utilizes Microsemi’s

Other benefits of this new topology

PRODUCT HIGHLIGHT

12V Dual 6W CCFL Programmable Inverter Module

PRODUCTION DATAS HE E T

KEY FEATURES

 Externally Programmable

Maximum Output Current

 Easy to Use Brightness Control
 RangeMAX™ Wide Range

Dimming

 Output Open & Short-Circuit

Protection and Automatic Strike­Voltage Regulation and Timeout

 StayLit™ Continued Operation

with Single Open Lamp Failure

 Fixed Frequency Operation
 Fault Output Signal
 Rated From -30°C to 80°C
 RoHS Compliant
 UL60950 E175910



APPLICATIONS

 Dual Lamp LCD’s Requiring a

Shared Common Lamp Return

 Mates to a Single JST BHR-04

VS-1 Lamp Connector

 Industrial Display Controls

BENEFITS

 Smooth, Flicker Free 1% - 100%

Full-Range Brightness Control

 Programmable Output Current

Allows Inverter to Mate With a
Wide Variety of LCD Panel’s
Specifications

 Output Open Circuit Voltage

Regulation Minimizes Corona
Discharge For High Reliability

WWW.Microsemi .COM

DC Voltage

Source

Potentiometer

Microsemi

UNIVERSAL DIMMING INPUT

Lamp
Fault
Signal

OUTPUT

PART NUMBER OUTPUT CONNECTOR

LXMG1626-12-45 JST SM04(4.0)B-BHS-1-TB(LF)(SN), Yeon Ho 20015WR-07A00 or equivalent JST BHR-04VS-1

Copyright © 2007
Rev.1.1, 2007-08-24

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]

"PWM", VDC, OR POTENTIOMETER

Lamp current 5 or 6mA per Lamp

PACKAGE ORDER INFO

Microsemi

Analog Mixed Signal Group

PWM

Signal

INPUT

4

123

W

HI

HI

I

NVERTER MATES DIRECTLY

TO

PANEL CONNECTORS

Page 1

L

L

X

X

M

M

G

G

1

1

6

6

2

2

6

6

-

-

1

1

2

2

-

-

4

4

5

5

PanelMatch™ StayLit™ LXMG1626-12-45

TM

®

12V Dual 6W CCFL Programmable Inverter Module

PRODUCTION DATAS HE E T

Input Signal Voltage (VIN) ......................................................................................................................................-0.3V to 15V

Input Power......................................................................................................................................................................... 8W

Output Voltage, no load ............................................................................................................ Internally Limited to 1500V

Output Current (per lamp) ...........................................................................................................6.6mA

Output Power ..................................................................................................................................................................... 6W

Input Signal Voltage (

SLEEP

Input)..................................................................................................................-0.3V to 13.2V

Input Signal Voltage (BRITE) ...............................................................................................................................-0.3V to 5.5V

Ambient Operating Temperature, zero airflow.....................................................................................................-30°C to 80°C

Operating Relative Humidity, non-condensing ................................................................................................................ ≤90%

Storage Temperature Range...............................................................................................................................-40°C to 85°C

Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified

terminal.

RECOMMENDED OPERATING CONDITIONS (R.C.)

This module has been designed to operate over a wide range of input and output conditions. However, best efficiency and performance
will be obtained if the module is operated under the condition listed in the ‘R.C.’ column. Min. and Max. columns indicate values beyond
which the inverter, although operational, will not function optimally.

Parameter Symbol

Input Supply Voltage Range (Fully Regulated Lamp
Current)

Input Supply Voltage Range (Functional)
Output Power P
Linear BRITE Control Input Voltage Range V
Lamp Operating Voltage V
Lamp Current (Full Brightness, per Lamp) I
Operating Ambient Temperature Range T

¹ Based on single lamp voltage measurement, use of lamps outside of this range may result is false triggering of the fault detection circuitry.

²At input voltages below 12V the inverter may not be able to output the full 6mA

Unless otherwise specified, the following specifications apply over the recommended operating condition and ambient temperature of
0°C to 60°C except where otherwise noted.

Parameter Symbol Test Conditions

OUTPUT PIN CHARACTERISTICS

`

Full Bright Lamp Current (two lamps) I

Full Bright Lamp Current (two lamps) I

Output Current Lamp to Lamp
Deviation

Min. Average Lamp Current I

Lamp Start Voltage VLS VIN > 10.8V 1250 1400 V

Operating Frequency fO

Burst Frequency f

FAULT Output Voltage High FAULTVH FAULT = -10uA 3 3.5 V

FAULT Output Voltage Low FAULTVL FAULT = 10uA 0.3 0.8 V

ABSOLUTE MAXIMUM RATINGS

(Internally Limited)

RMS

Recommended Operating Conditions

Min R.C. Max

V

IN

4.5 5.5 W

O

0 2.0 V

BRT_ADJ

385 435 485 V

LAMP

5.0 6.0 mA

O(LAMP)

-30 80 °C

A

RMS

10.8 12 13.2

10.2 12 13.6

per lamp in all configurations.

ELECTRICAL CHARACTERISTICS

LXMG1626-12-45

Min Typ Max

L(MAX)

L(MAX)

I

LL%DEV

L(MIN)

BURST

I

= Ground

SET

> 2.0V,

V

BRT_ADJ

I

= Open

SET

> 2.0V,

V

BRT_ADJ

I

= Open

SET

= 0V,

V

BRT_ADJ

I

= Ground; I

SET

V

BRT_ADJ

Output Burst Frequency 215 225 235 Hz

SLEEP

= 2.0V,

> 2.0V,

V

BRT_ADJ

SLEEP

SLEEP

SLEEP

OUT

SLEEP

> 2.0V, V

> 2.0V, V

> 2.0V, V

> 2.0V, V

= I

* SQRT of % duty cycle

MAX

> 2.0V, V

IN

IN

IN

IN

= 12V

IN

= 12V

= 12V

= 12V

= 12V

9 10 11 mA

11 12 13 mA

5 %

1.6 mA

55.2 57.6 60 kHz

Units

V

RMS

RMS

RMS

¹

²

Units

RMS

RMS

RMS

RMS

WWW.Microsemi .COM

E

E

L

L

E

E

C

C

T

T

R

R

I

I

C

C

A

A

L

L

S

S

Copyright © 2007
Rev.1.1, 2007-08-24

Microsemi

Analog Mixed Signal Group

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]

Page 2