LX6512
TM
®
High Performance CCFL Controller
P
RODUCTION
D
ATA
S
HEET
DESCRIPTION
KEY FEATURES
IMPORTANT:
For the most current data, consult
MICROSEMI’s
website:
http://www.microsemi.com
Protected by U.S. Patents: 5,615,093; 5,923,129; 5,930,121; 6,198,234; 7,112,929; Patents Pending
CN1
1
2
3
4
5
6
7
8
FUSE
F1
bs
VDDA
CON8
R5
115K
R1
61.9K
R7
1M
1
2
3
4
5
6
7
8
BRITE_D
F_OSC
B_OSC
ENA
VIN_SNS
VDDA
VDDP
16
VDDA
4
3
2
1
C14
C2
100pF
15
14
C6
C4
0.1uF
100nF
1uF
C3
C5
1uF
AOH
U1
LX6512CLQ
BOH
13
12
C_TO
ol
e
•
•
•
•
•
C9
10uF
U2
T1
5
6
7
8
C12
2.2nF
C11
EA_OUT
V_SNS
ISNS
GND
AOL
BOL
11
10
9
Microsemi’s LX6512 is a cost effective,
Direct Drive CCFL (Cold Cathode
Fluorescent Lamp) controller. The
integrated controller is optimized to drive
CCFL’s (Cold Cathode Fluorescent
Lamps) using either resonant full bridge
inverter topology or push-pull Direct
Drive configurations.
Resonant full bridge topology provides
near sinusoidal waveforms over a wide
supply voltage range in order to maximize
the life of CCFL lamps, control EMI
emissions, and maximize efficiency. This
new architecture is also coupled with a
wide dimming range capability.
For fixed input supply applications the
LX6512 uses Direct Drive topology to
supply fixed frequency PWM signals
connected directly to the high voltage
transformer primary via a single pair of N-
FET drivers, providing a simple, low cost
inverter solution.
The LX6512 contains safety features
that limit the transformer secondary
voltage and protect against fault conditions
which include open lamp, broken lamp
and short-circuit faults. The over voltage
fault shutdown is disabled during a user
programmable interval to allow lamp
strike.
The controller can accept a brightness
control signal that is either an analog
voltage level, or a direct low frequency
PWM. Utilizing this signal it provides
CCFL brightness dimming control using
digital dimming, to achieve a wide
dimming range (> 60 to 1).
An integrated 4V LDO (Low Dropout
Regulator) powers all internal control
circuitry and up to 5mA for external
circuitry greatly simplifying supply
voltage requirements.
The LX6512 is available in a 16-Pin
SOIC, TSSOP and 3x3 mm 16pin QFN.
WWW .
Microsemi
.C
OM
O
3.9nF
L
OW
C
OMPONENT
C
OUNT
R
EQUIREMENT FOR
T
OTAL
S
YSTEM
S
OLUTION
te
C13
100nF
CN2
1
2
CON2
2pF PCB
R4
374 Ohm
•
Full Bridge or Direct Drive Push
Pull Configurable
•
Patented Striking Topology
•
Low Stress to Transformers
•
Wide Dimming Range
•
Programmable Operating
Dimming Frequency
•
Programmable Time Out
Protection
•
Fixed Operating Frequency
•
Open Lamp Voltage Protection,
Short Lamp Protection, Over
Voltage Protection
•
Compatible with Existing
Transformers
APPLICATIONS
Note Book LCD displays
Transportable Computers
Web Tablet LCD displays
Digital Picture Frame
Monitor / TV Portable DVD Player
LX6512
LX6512
PACKAGE ORDER INFO
THERMAL DATA
T
A
(°C)
D
LQ
PW
Plastic SOIC 16-pin
Plastic 3x3 mm QFN 16-pin
Plastic TSSOP 16-pin
RoHS Compliant / Pb-free
θ
J
A
= 82.2
°C/W
θ
J
A
= 33.3°C/W
θ
J
A
= 99
°C/W
THERMAL RESISTANCE
-
JUNCTION TO AMBIENT
-20 to 85
LX6512CD, LX6512CLQ or LX6512CPW
Note: Available in Tape & Reel. Append the letters “TR” to the part number.
(i.e. LX6512CD-TR)
Junction Temperature Calculation: T
J
= T
A
+ (P
D
x
θ
JA
).
The
θ
JA
numbers are guidelines for the thermal performance of the
device/pc-board system. All of the above assume no ambient airflow.
Copyright
©
2007
Rev. 1.3, 10/22/2009
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
TM
®
WWW .
Microsemi
.C
OM
INFORMATION
Thank you for your interest in Microsemi
®
Analog Mixed Signal products.
The full data sheet for this device contains proprietary information.
or
Contact us directly by sending an email to:
IPGdatasheets@microsemi.com
Be sure to specify the data sheet you are requesting and include your company
name and contact information and or vcard.
We look forward to hearing from you.
O
Copyright
bs
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
ol
e
To obtain a copy, please contact your local Microsemi sales representative. The
name of your local representative can be obtained at the following link
http://www.microsemi.com/contact/contactfind.asp
te
Test/Measurement
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