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LX1691AIPW 参数 Datasheet PDF下载

LX1691AIPW图片预览
型号: LX1691AIPW
PDF下载: 下载PDF文件 查看货源
内容描述: 增强多模式CCFL控制器 [Enhanced Multi-Mode CCFL Controller]
分类和应用: 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
文件页数/大小: 2 页 / 108 K
品牌: MICROSEMI [ MICROSEMI CORPORATION ]
 浏览型号LX1691AIPW的Datasheet PDF文件第2页  
LX1691A
TM
®
Enhanced Multi-Mode CCFL Controller
P
RODUCTION
D
ATA
S
HEET
KEY FEATURES
Simultaneous Amplitude And
Duty Cycle Dimming Modes
Resistor programmable min and
max lamp currents
Digital Dimming Can Synch To
External Or Internal Clocks
120 ms Power On Delay
Open Or Shorted Lamp
Regulation & Shutdown
“On Chip” Full Wave Lamp
Current Rectifier
16 Pin TSSOP Package
Very Stable Oscillator with On-
Chip timing capacitor
Enhanced Digital Dimming
Resolution
Wide Input Voltage Capable
BENEFITS
Low Component Count / Module
Cost / And Size
High “Nits/Watt” Efficiency
Operates Directly From a Single
Li-Ion Cell
Industries Safest And Highest
Performing Strike Voltage
Generation (Patented)
Tight Operating Frequency
Tolerance For Easier System
Level RFI Control
DESCRIPTION
Mircrosemi’s
LX1691A
is
an
enhanced Direct Drive CCFL (Cold
Cathode Fluorescent Lamp) Controller.
Its architecture is based on the LX1691.
LX1691A based inverter modules can
be designed for virtually any CCFL
appliance from digital cameras and
PDA’s to big screen monitors and driver
viewable automotive displays.
New versatile dimming circuitry can
accept digital and analog control inputs
and provides six different dimming
modes that control both lamp current
amplitude and duty cycle, either simul-
taneously or separately. Designers can
select normal or reverse polarity dimming
and precisely program mini-mum and
maximum lamp currents with resistors.
The LX1691A fault shutdown feature
is enhanced to include regulation and
shutdown for over voltage and over
current conditions.
The LX1691A includes the Microsemi
proven and patented strike method that
allows significant efficiency gains while
guaranteeing strong striking power at all
operating temperatures.
Our method
sweeps
strike frequency
smoothly up to the unloaded resonant
frequency of the lamp and high voltage
transformer. This, coupled with the
LX1691A’s active high output voltage
regulation, produces just enough strike
voltage without generating unpredictable
high voltage spikes that cause arcing and
component failures. Competitive devices
that simply
switch
to a higher frequency
for striking do not have this “real time”
control over output voltage, and require
much more attention to transformer
design.
The LX1691A is optimized for wide
input voltage applications. It is identical
to the LX1691 except it has a guaranteed
minimum lamp strike interval of one
second to meet notebook and monitor
panel manufacturer’s specifications. The
LX1691A includes feed forward
compensation that provides improved
regulation and transient response over an
7 – 24 volt input supply range. The
LX1691A can also be used with a fixed
input supply and will produce
performance equal to that of the
LX1691.
WWW .
Microsemi
.C
OM
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; Patents Pending
PRODUCT HIGHLIGHT
Traditional Analog
2
Lamp Current (mA)
BRITE_IN
+3V
T2
+
External Digital
2
Lamp Current (mA)
BRITE_IN
+
VDC
0
T1
DD_CLK
T1
VDC
0
_
T2
T
DD_CLK
T = 512 / DD_CLK Frequency
T
_
Internal Digital
2
Lamp Current (mA)
BRITE_IN
+3V
T
+
Direct PWM (Analog)
2
Lamp Current (mA)
BRITE_IN
+
VDC
0
DD_CLK
T
VDC
0
T1
_
T2
T = 512 / Lamp Frequency
DD_CLK
T1
LX1691A
LX1691A
_
T2
Four of Six Dimming Modes
PACKAGE ORDER INFO
T
A
(°C)
-40 to +85
M
IN
V
DDP
2.8V
M
AX
V
DDP
5.5V
PW
Plastic TSSOP
16-PIN
LX1691AIPW
RoHS Compliant / Pb-free
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1691AIPW-TR)
Copyright
©
2003
Rev. 1.1b, 8/30/2006
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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