LXMG1612-12-03 [MICROSEMI]

12V Highly-Integrated, Digital Dimming CCFL Inverter Module; 12V高度集成的数字调光CCFL逆变器模块


型号：	LXMG1612-12-03
厂家：	Microsemi
描述：	12V Highly-Integrated, Digital Dimming CCFL Inverter Module 12V高度集成的数字调光CCFL逆变器模块模拟IC 信号电路
文件：	总6页 (文件大小：132K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LXMG1612-12-xx

12V Highly-Integrated, Digital Dimming CCFL Inverter Module

PRODUCTION DATASHEET

KEY FEATURES

DESCRIPTION

RangeMAX Wide Range Dimming,

Single Output Inverter. The convert DC voltage from the system

LXMG1612-12-xx series of Direct battery or AC adapter directly to high-

Drive™ CCFL (Cold Cathode frequency, high-voltage waves required

Fluorescent Lamp) Inverter Modules are to ignite and operate CCFL lamps. A 5V

specifically de-signed for driving LCD input inverter is also available

Input Voltage Range: The modules

RangeMAX Wide Range

Dimming

9.6V to 14.4V Input Voltage

Fully Integrated Direct Drive

And Dimming Control

Single Sided PCB Layout

Easy To Use Brightness

Control

backlight lamps.

RangeMAX

(LXMG1612-05-xx).

Digital

Dimming

Direct Drive Technology: The module

MicroAmp

Mode

SLEEP

Technique. Digital Dimming provides design is based on a new Direct Drive

flicker-free brightness control in any topology, which provides a number of

Output Short-Circuit Protection

And Automatic Strike-Voltage

Regulation

wide-range dimming application.

cost and performance advantages.

The modules are equipped with a

Additional Features: Other benefits of

Fixed Frequency Operation

UL 60950 E175910

RoHS Compliant

dimming input that permits brightness this new topology are fixed-frequency

control from an external potentiometer, operation and secondary-side strike-

DC voltage source, or PWM signal. The voltage regulation and all LXMG1612-

resultant “burst drive” that energizes the 12-xx modules feature both open and

lamp was designed specifically to ensure shorted lamp protection.

that no premature lamp degradation

APPLICATIONS

Notebook And Sub-Notebook

Computers

Portable Instrumentation

Desktop Displays

Low Ambient Light Conditions

(i.e. Aircraft Cabins,

occurs.

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; Patents Pending

Automobile)

PRODUCT HIGHLIGHT

BENEFITS

Smooth, Flicker Free 1-100%

Full-Range Brightness Control

Gives Your Product A High

Quality Image

Output Open Circuit Voltage

Regulation Minimizes Corona

Discharge For Long Life And

High Reliability

DC Voltage

Source

PWM

Signal

Potentiometer

BRITE

Power Efficient. “Low

Brightness” Capability Allows

For Advanced Power

Microsemi

UNIVERSAL DIMMING INPUT

Management

"PWM", V_DC, OR POTENTIOMETER

PACKAGE ORDER INFO

INVERTER MATES DIRECTLY TO

PANEL CONNECTORS

BHR-03VS-1

PART NUMBER

OUTPUT CONNECTOR

LXMG1612-12-01

LXMG1612-12-02

LXMG1612-12-03

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

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

Honda QZ-19-A3MYL #02

BHSR-02VS-1

Honda QZ-19-3F01

Rev. 1.1, 2007-03-27

Microsemi

Page 1

Integrated Products

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

LXMG1612-12-xx

12V Highly-Integrated, Digital Dimming CCFL Inverter Module

PRODUCTION DATASHEET

ABSOLUTE MAXIMUM RATINGS (NOTE 1)

Input Signal Voltage (V_IN1)................................................................................................................................. -0.3V to 16V

Output Voltage, no load .........................................................................................................Internally Limited to 1800V_RMS

Output Current ........................................................................................................................ 8.0mA_RMS(Internally Limited)

Output Power .................................................................................................................................................................. 6.0W

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

Input Signal Voltage (

, V_SYNCInputs)..................................................................................................... -0.3V to 5.5V

SLEEP

Ambient Operating Temperature, zero airflow .....................................................................................................0°C to 70°C

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

Note 1: 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.

FUNCTIONAL PIN DESCRIPTION

CONN

DESCRIPTION

CN1 (Molex 53261-0871) Mates with 51021-0800 housing, 50079-8100 pins

CN-1

V_IN1

Main Input Power Supply (9.6V < V_IN1< 14.4V)

Power Supply Return

CN1-2

CN1-3

CN1-4

CN1-5

CN1-6

CN1-7

CN1-8

GND

ON/OFF Control. (2.1V <

< V = ON, 0V <

< 0.8V = OFF,

Floating=OFF)

SLEEP

BRITE

SLEEP

IN1

Brightness Control (0.0V to 2.5V_DC). 2.5V_DCgives maximum lamp current.

BRITE RTN Analog Ground. Use for BRITE signal return ONLY.

V_SYNCVertical Synchronization Input. 2.5 to 5.0V Logic Level. (20Hz < f_SYNC< 200Hz)

CN2 for LXMG1612-12-01 and -02 (JST SM02(8.0)B-BHS-1-TB (LF)(SN) | Yeon Ho 20015WR-05A00 or SM02B-BHSS-1-TB

(LF)(SN) | Yeon Ho 35001WR-02A00)

High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length.

DO NOT connect to Ground.

CN2-1

CN2-2

V_HI

Connection to low side of lamp. Connect to lamp terminal with longer lead length.

DO NOT connect to Ground

V_LO

CN2 for LXMG1612-12-03 (Honda QZ-19-A3MYL#02)

High voltage connection to high side of lamp. Connect to lamp terminal with shortest lead length.

DO NOT connect to Ground.

CN2-3

CN2-1

V_HI

Connection to low side of lamp. Connect to lamp terminal with longer lead length.

DO NOT connect to Ground

V_LO

PHYSICAL DIMENSIONS

LXMG1612-12-XX

4.96in.

126mm

MOUNTING HOLE

3.0mm DIA. ± .08DIA

CN1

0.13in.

0.63in.

16mm

CN2

0.5in.

12.7mm

3.3mm

GROUNDEDMOUNTINGHOLE

3.0mmDIA. ± .08DIA

3.64in.

92.5mm

0.66in.

16.75mm

0.06in.

1.52mm

Warning

High Voltage Present at all

Output Connectors

0.315in.

8.0mm

PCB tolerances ± 0.5mm

Weight: 12.5 (g) typ.

Rev. 1.1, 2007-03-27

Microsemi

Page 2

Integrated Products

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

LXMG1612-12-xx

12V Highly-Integrated, Digital Dimming CCFL Inverter Module

PRODUCTION DATASHEET

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.

Recommended Operating Conditions

Parameter

Symbol

Units

Min

R.C.

Max

Input Supply Voltage Range (Fully Regulated

Lamp Current)

Input Supply Voltage Range (Functional)

Output Power

Brightness Control Input Voltage Range

Lamp Operating Voltage

Lamp Current (Full Brightness)

Operating Ambient Temperature Range

10.8

9.6

13.2

V_IN1

3.5

2.5

535

5.8

14.4

4.0

P_O

V_{BRT_ADJ}

V_LAMP

I_OLAMP

V_RMS

mA_RMS

°C

0.0

450

620

ELECTRICAL CHARACTERISTICS

Unless otherwise specified, the following specifications apply over the recommended operating conditions and ambient temperature of

25°C except where otherwise noted.

LXMG1612-12-xx

Parameter

Symbol

Test Conditions

Units

Min

Typ

Max

OUTPUT PIN CHARACTERISTICS

V_{BRT_ADJ}=2.5V_DC

=HIGH,

SLEEP

Burst Duty=100%, V_IN1=12V_DC

Full Bright Lamp Current

I_L(MAX)

I_L(MIN)

5.2

5.8

6.4

mA_RMS

V_{BRT_ADJ}=0V_DC

V_IN1=12V_DC

=HIGH, Burst Duty=2.0%,

SLEEP

Min. Average Lamp Current

(Note 2)

0.12

Lamp Start Voltage

Operating Frequency

BRITE INPUT

V_LS

f_O

0°C <T_A< 70°C, V_IN1> 9.6V_DC

_{BRT_ADJ}=2.5V_DC=HIGH, V_IN1=9.6V – 14.4V

1500

1650

1800

V_RMS

kHz

SLEEP

V_{BRT_ADJ}=0V_DC

-685

-260

2.30

0.0

-728

-282

2.35

-775

-305

2.40

µA_DC

V_DC

Input Current

I_BRT

V_{BRT_ADJ}=2.5V_DC

Input Voltage for Max. Lamp Current

Input Voltage for Min. Lamp Current

V_{BRT_ADJ}I_O(LAMP)=100% Duty Cycle

V_{BRT_ADJ}I_O(LAMP)= Minimum Duty Cycle

V_DC

SLEEP INPUT

V_SLEEP(HI)

V_SLEEP(LO)

RUN Mode

V_IN1=12V

1.9

-5.0

390

0.0

2.1

1.9

410

0.0

V_IN1

2.0

435

0.0

V_DC

Mode

SLEEP

=5.0V

µA_DC

SLEEP

Input Current

I_SLEEP

=0V

VSYNC CHARACTERISTICS

Logic High Level

V_SYNCH(HI)V_IN1=12V

1.50

-3.0

2.5

0.0

5.0

1.2

V_DC

KΩ

V_SYNCH(LO)V_IN1=12V

Input Impedance

Z_IN

Input Frequency

f_SYNC

200

POWER CHARACTERISTICS

Sleep Current

_IN1=12V_DC

=0.0V

SLEEP

I_IN(MIN)

0.0

0.5

µA_DC

Note 2: Minimum lamp current required to maintain even light output may vary with display panel.

Average RMS current = (burst duty cycle) x (burst amplitude of 5.8mA_RMS

)

Rev. 1.1, 2007-03-27

Microsemi

Page 3

Integrated Products

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

LXMG1612-12-xx

12V Highly-Integrated, Digital Dimming CCFL Inverter Module

PRODUCTION DATASHEET

HOW RANGEMAX WORKS

LAMP VOLTAGE & LAMP CURRENT – Burst Mode Operation

Figure 2 – 2% Burst Duty Cycle

Figure 1 – 50% Burst Duty Cycle

Rather than using the traditional dimming technique of varying

lamp current magnitude to adjust light output, RangeMAX

inverters use a fixed lamp current value with a duty cycle control

method.

The lamp current burst width can be modulated from 100%

(continuous lamp current) down to a 2% duty cycle, allowing the

lamp to be dimmed to less than 1% of its full brightness.

As can be seen in Trace 4 of Figure 3 photo at right, careful

design consideration was given to controlling lamp start voltage

to softly start current flow. This eliminates current overshoot that

can result in premature cathode wear and reduce lamp life.

Figure 3 – 2% Burst Duty Cycle (Expanded Time Base)

High Voltage

Transformer

V_HI

Comparator

V_BRITE

Transformer

Driver

0.25 -

2.5V_DC

Ramp

Ramp Gen

V_SENSE

V_SYNC

I_SENSE

V_LO

Figure 4 – RangeMAX Block Diagram

Rev. 1.1, 2007-03-27

Microsemi

Page 4

Integrated Products

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

LXMG1612-12-xx

12V Highly-Integrated, Digital Dimming CCFL Inverter Module

PRODUCTION DATASHEET

HOW RANGEMAX WORKS (CONTINUED)

Highlights

Integrated brightness control circuit includes a DC voltage to

pulse width converter that minimizes system design work and

system noise susceptibility. This provides a familiar and

convenient interface while reducing the potential for

externally induced noise, which can cause lamp flicker.

In applications with no access to a vertical sync., an onboard

oscillator operates the inverter burst rate at about 250Hz. In

this non-synchronous mode, minor display disturbances can

be found under certain video conditions. This performance

may be acceptable for many applications, but

synchronization must be used when no disturbance can be

tolerated.

RangeMAX inverter modules are designed to operate with the

burst frequency synchronized to the video frame rate. This

provides operation with no visible display disturbances

caused by beat frequencies between the lamps and video

frame rates. In this synchronous mode, the inverter burst rate

operates at twice the video refresh rate, well beyond standard

50/60Hz video refresh rates where the eye can perceive

pulsing light.

A single input will accommodate negative and positive

vertical sync pulses at any pulse width.

Separate feedback loops for lamp current and open circuit

voltage regulation insure reliable strike under all operating

conditions, automatic over-voltage prevention with broken

or failed lamps, and accurate lamp current regulation.

TYPICAL APPLICATION

12V

V_IN1

The brightness control may be a voltage output DAC, digital

DAC or

Pot

resistor or a simple 10k potentiometer. If desired, an

additional series resistor with the 10k potentiometer can be

used to set a higher minimum brightness setting as shown in

Figure 5. A 2.5V to 5V Logic Level PWM signal from a

micro-controller may also be used as shown in Figure 5A.

BRITE

V_HI

10k

CCFL

TUBE

LXMG1612-12-xx

BRITE RTN

V_SYNC

SLEEP

V_LO

GND

If synchronization to the video frame rate is desired, connect

the vertical sync pulse from the system video controller to

the V_SYNCinput. If no video synchronization is desired,

connect V_SYNCto ground.

V_SYNC

Figure 5

- Potentiometer Brightness Control

PWM Signal

from System

If you need to turn the inverter ON/OFF remotely, connect

BRITE

to 2.5V to 5V logic signal to the

input.

SLEEP

P.W.

Connect V_HIto high voltage wire from the lamp. Connect

V_LOto the low voltage wire (wire with thinner insulation).

Never connect V_LOto circuit ground as this will defeat lamp

current regulation. If both lamp wires have heavy high

LXMG1612-12-xx

< 2ms

0 < P.W. < 100% of period

voltage insulation, connect the longest wire to V_LO

This

Figure 5A - PWM Brightness Control

wire is typically white.

LXMG1612-12-XX OUTPUT CURRENT ADJUST

The LXMG1612-12 output current can be adjusted by changing the

value of two resistors on the PCB. The following table shows the

approximate new output current values:

R30

R33

R34

R15

C11

C15

R12

R14

C16

R21

C12

R11

C14

C13

Output Current

7.0mA

R12

R16

R20

R41

2.00K 1%

2.61K 1%

2.74K 1%

Not Used

499K 1%

178K 1%

78.7K 1%

C21

6.0mA

5.8mA

C10

R38

R39

R16

R10

R13

5.0mA

4.0mA

3.0mA

Figure 6- Component Replacement Locations

Rev. 1.1, 2007-03-27

Microsemi

Page 5

Integrated Products

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

LXMG1612-12-xx

12V Highly-Integrated, Digital Dimming CCFL Inverter Module

PRODUCTION DATASHEET

NOTES

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

necessarily include testing of all parameters. Microsemi reserves the right to change the

configuration and performance of the product and to discontinue product at any time.

Rev. 1.1, 2007-03-27

Microsemi

Integrated Products

Page 6

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

LXMG1612-12-03 [MICROSEMI]

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