LX1686CPW Microsemi Analog Mixed Signal Group, LX1686CPW Datasheet

LX1686CPW

Manufacturer Part Number

LX1686CPW

Description

IC CTRLR CCFL BACKLIGHT 24TSSOP

Manufacturer

Microsemi Analog Mixed Signal Group

Type

CCFL Controllerr

Datasheet

1.LX1686CPW.pdf (5 pages)

Specifications of LX1686CPW

Current - Supply

5mA

Voltage - Supply

3 V ~ 5.5 V

Operating Temperature

0°C ~ 85°C

Package / Case

24-TSSOP

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current - Output

Frequency

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

LX1686CPW

Manufacturer:

LINFINIT

Quantity:

20 000

Current page: 1 of 5
Download datasheet (141Kb)

H E

The LX1686 Backlight Controller IC

provides all the control functions needed

to implement Linfinity’s direct drive in-

verters used to operate cold cathode fluo-

rescent lamps (CCFL’s). This IC can be

used to control single or multiple-lamp

configurations. CCFL’s are used for back

or edge lighting of liquid crystal flat panel

displays (LCD’s) and typically find appli-

cation in notebook computers, web

browsers, automotive and industrial in-

strumentation, and entertainment sys-

tems.

trolled lamp current burst circuit that

can provide a >100:1 dimming range from

a simple zero to 2.5V potentiometer in-

put.

easily synchronized to the LCD panel’s

frame rate to prevent interference from

optical beat frequencies.

NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.

The LX1686 includes a PWM con-

N F I N I T E

The PWM dimming burst rate is

11861 W

O W E R

Standard Analog

Dimming Inverter

Light Output (Nits)

ESTERN

O F

I N

Note: All surface-mount packages are available in Tape & Reel.

VENUE

Append the letter "T" to part number. (i.e. LX1686CPWT)

LinFinity's

RangeMAX

N N O V A T I O N

I N I T Y

, G

clude a new dual feedback contol loop

that permits regulation of maximum lamp

strike voltage as well as lamp current.

Regulating maximum lamp voltage per-

mits the designer to provide for ample

worst case lamp strike voltage while at

the same time conservatively limit maxi-

mum open circuit voltage.

generation technique enables the mod-

ule designer to optimize high voltage

transformer design for maximum oper-

ating efficiency with no power dissipat-

ing overhead to guarantee strike capa-

bility.

nant, oscillator-controlled PWM regu-

lation method. The LX1686 allows a

wide choice of fixed operating frequen-

cies to match lamp current frequency to

the lamp’s most efficient operating point,

and to minimize high frequency interfer-

ence.

ARDEN

Safety and reliability features in-

An innovative new strike voltage

Direct drive topology is a non-reso-

105

ROVE

I C R O E L E C T R O N I C S

, CA. 92841, 714-898-8121, F

Light emitted by a CCFL is proportional to the current

flowing through it. There are two ways to control the

current: by adjusting the amplitude of a continuous AC

current; or, as with RangeMAX technology, by varying

the amount of time a burst of full current is present.

RangeMAX technology frees the backlight inverter

module designer to operate in a lower brightness and

lower power consumption mode than is possible with

conventional amplitude control methods.

Plastic TSSOP

24-pin

N C

: 714-893-2570

RangeMAX

Synchronizable To Display Video Frequency

High Voltage Feedback Loop Directly

Controls Maximum Open Lamp And

Minimum Strike Voltages

Transformer Protected From Over-Heating

During Lamp Striking

Micro-Amp Sleep Mode

User-Programmable Fixed Frequency

Operation

Under-Voltage Lockout Feature With Power-

Up Reset

Built-In Soft-Start Feature

Operates With 3.3V or 5V Power Supplies

100mA Output Drive Capability

Notebooks

Instrumentation Displays

Desktop Computer Monitors

Low Ambient Light Displays (used in

Aircraft, Automobiles, and Hand-held

Equipment)

Extemely High Efficiency From 3.3V or 5V

Power Supplies

Lower Cost Than Conventional Buck / Royer

Inverter Topologies

Improved Lamp Strike Capability

Improved Over-Voltage Control

Wide Range Dimming (>100:1)

LX1686

Related parts for LX1686CPW

LX1686CPW Summary of contents

Page 1

... RangeMAX lower power consumption mode than is possible with conventional amplitude control methods. 90 105 Plastic TSSOP PW 24-pin Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number. (i.e. LX1686CPWT CA. 92841, 714-898-8121, F VENUE ARDEN ...

Page 2

LX1686 Supply Voltage (VDD, VDD_P) ......................................................................... 6.5V Digital Inputs .................................................................................. -0.3 to VDD+0.5V Analog Inputs .................................................................................. -0.3 to VDD+0.5V Digital Outputs ................................................................................ -0.3 to VDD+0.5V Analog Outputs ............................................................................... -0.3 to VDD+0.5V Operating Junction Temperature Plastic (DB, PW Packages) .......................................................................... 150°C ...

Page 3

Parameter Digital Dimmer Block FVERT Input Frequency Capture Range FVERT Logic Threshold FVERT Input Resistance VCO Analog Output Peak Voltage VCO Analog Output Valley Voltage VCO Forced Source Current Forced VCO Oscillation Frequency Auto-Frequency Detection Response BRITE Voltage Range Full-Brightness ...

Page 4

LX1686 Pin Pin Number Designator Description 4 ...

Page 5

FIGURE 1 — LX1686 Block Diagram RangeMAX and is a trademark of Linfinity Microelectronics Inc. PRELIMINARY DATA - Information contained in this document is pre-production data, and is proprietary to LinFinity. It may not modified in any way without the ...

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