LX6501

Microsemi

Analog Mixed Signal Group

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

Page 1

Copyright

© 2007

Rev. 1.0, 2007-08-01

High Performance Multi-Lamp CCFL Controller

TM

®

DESCRIPTION

The LX6501 is a high performance

CCFL controller optimized for LCD-

TV and other multi-lamp LCD display

applications.

The

controller

includes

fully

integrated on chip gate drivers with

adequate capacity to drive N channel

power MOSFET’s on both low side

and high side of a full bridge inverter

with input voltage of up to 27V. An

on-chip

regulator

generates

the

internal driver operating voltage to

supply the output gate drive circuit.

This allows a direct connection of the

controller

to

the

inverter

supply

minimizing external components.

In

addition,

it

also

provides

synchronization capability that allows

the user to synchronize both the

frequency and phase of the lamp

current between inverters or to an

external synchronization signal.

The

lamp

current

regulation

performance

is

also

enhanced

to

improve both the regulation accuracy

and the dynamic response at transient

conditions.

In addition a comprehensive dimming

control feature is facilitated to satisfy

various brightness control requirements.

The LX6501 includes extensive fault

detection

functions,

including

open

lamp, over voltage, short circuit, over

current, and over temperature protection.

A programmable input Under Voltage

Lock Out (UVLO) protection circuit

monitors the input voltage and protects

the

inverter

from

under

voltage

operation.

The device is available in the 28 lead

TSSOP, and SOWB surface mount

packages in the industrial temperature

range.

Protected by U.S. Patent No. 7,112,929, Patents Pending

KEY FEATUR ES

Integrated Gate Driver to

Support High Side N Channel

MOSFET

0.6A Sourcing and 1.2A

Sinking Drive Current

10 to 27 Volt Power Rail for

Inverter Operation (35V

Absolute Maximum)

On Chip Regulator with Under

Voltage Lock Out Protection

Inverter Operating Frequency

and Phase Synchronization

Programmable Strike Time,

Fault Time, Strike Frequency,

and Burst Dimming Frequency

Multiple Voltage and Current

Sense Inputs

Programmable Input Under

Voltage Lockout

APPLI C ATION S

LCD-TV

Multi-Lamp LCD Monitors

CCFL, EEFL, FFL Backlight

Systems

PRODUCT H I GHLIGHT

Part

AOH

AOL

BOH

BOL

I_SNS

V_SNS

Synchronization

Control

SYNC_IN

SYNC_OUT

VIN

GND

VIN

GND

LX6501

Regulator

And

UVLO

PACKAGE ORDER INFO

PW

Plastic TSSOP

28-Pin

RoHS Compliant / Pb-free

DW

Plastic SOWB

28-Pin

RoHS Compliant / Pb-free

-40 to 85

LX6501IPW

LX6501IDW

Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX6501IPW-TR)