LX6501
TM
廬
High Performance Multi-Lamp CCFL Controller
P
RODUCTION
D
ATA
S
HEET
DESCRIPTION
KEY FEATURES
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
APPLICATIONS
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鈥檚 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.
WWW .
Microsemi
.C
OM
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
website:
http://www.microsemi.com
Protected by U.S. Patent No. 7,112,929, Patents Pending
LCD-TV
Multi-Lamp LCD Monitors
CCFL, EEFL, FFL Backlight
Systems
PRODUCT HIGHLIGHT
VIN
VIN
Regulator
And
UVLO
LX6501
AOH
AOL
Part
SYNC_IN
SYNC_OUT
Synchronization
Control
BOH
BOL
I_SNS
V_SNS
GND
GND
JIN Balancer鈩?/div>
LX6501
LX6501
PACKAGE ORDER INFO
T
A
(擄C)
-40 to 85
PW
RoHS Compliant / Pb-free
DW
LX6501IPW
Plastic TSSOP
28-Pin
Plastic SOWB
28-Pin
RoHS Compliant / Pb-free
LX6501IDW
Note: Available in Tape & Reel. Append the letters 鈥淭R鈥?to the part number. (i.e. LX6501IPW-TR)
Copyright
漏
2007
Rev. 1.0, 2007-08-01
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
1
2
