LX6512
TM
廬
High Performance CCFL controller
P
RODUCTION
D
ATA
S
HEET
DESCRIPTION
KEY FEATURES
Microsemi鈥檚 LX6512 is a cost effective,
Direct Drive CCFL (Cold Cathode
Fluorescent Lamp) controller. The
integrated controller is optimized to drive
CCFL鈥檚 (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
TSSOP and 3x3 mm 16pin QFN.
WWW .
Microsemi
.C
OM
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Full Bridge or Direct Drive Push
Pull Configurable
鈥?/div>
Patented Striking Topology
鈥?/div>
Low Stress to Transformers
鈥?/div>
Wide Dimming Range
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Programmable Operating
Dimming Frequency
鈥?/div>
Programmable Time Out
Protection
鈥?/div>
Fixed Operating Frequency
鈥?/div>
Open Lamp Voltage Protection,
Short Lamp Protection, Over
Voltage Protection
鈥?/div>
Compatible with Existing
Transformers
APPLICATIONS
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鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Note Book LCD displays
Transportable Computers
Web Tablet LCD displays
Digital Picture Frame
Monitor / TV
Portable DVD Player
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
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
CON8
R5
115K
FUSE
F1
C9
10uF
VDDA
R1
61.9K
R7
1M
U2
T1
C13
100nF
CN2
1
2
CON2
1
C14
C2
100pF
100nF
2
3
4
C3
C5
1uF
3.9nF
5
6
7
8
BRITE_D
F_OSC
B_OSC
ENA
C_TO
EA_OUT
V_SNS
ISNS
VIN_SNS
VDDA
VDDP
AOH
BOH
GND
AOL
BOL
16
VDDA
15
14
13
12
11
10
9
C6
C4
0.1uF
1uF
4
3
2
1
5
6
7
8
C11
2pF PCB
U1
LX6512
C12
2.2nF
R4
374 Ohm
LX6512
LX6512
L
OW
C
OMPONENT
C
OUNT
R
EQUIREMENT FOR
T
OTAL
S
YSTEM
S
OLUTION
PACKAGE ORDER INFO
THERMAL DATA
T
A
(擄C)
-20 to 70
LQ
PW
Plastic 3x3 mm QFN 16-pin
Plastic TSSOP 16-pin
RoHS Compliant / Pb-free
胃
J
A
= 33.3擄C/W
胃
J
A
= 99
擄C/W
THERMAL RESISTANCE
-
JUNCTION TO AMBIENT
LX6512CLQ or LX6512CPW
Microsemi
Note: Available in Tape & Reel. Append the letters 鈥淭R鈥?to the part number.
(i.e. LX6512CLQ-TR)
Junction Temperature Calculation: T
J
= T
A
+ (P
D
x
胃
JA
).
The
胃
JA
numbers are guidelines for the thermal performance of the
device/pc-board system. All of the above assume no ambient airflow.
Page 1
Copyright
漏
2007
Rev. 1.0, 2007-12-21
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LX6512相關(guān)型號PDF文件下載
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英文版
Microsemi Corporation [TM High Performance Multi-Lamp CCFL ...
MICROSEMI
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英文版
Microsemi Corporation [High Performance CCFL controller]
MICROSEMI
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TM High Performance Multi-Lamp CCFL Controller
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TM High Performance Multi-Lamp CCFL Controller
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英文版
Fluorescent Light Controller
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1
2
