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參數(shù)資料
| 型號： | LX1688IPW |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | MULTIPLE LAMP CCFL CONTROLLER |
| 中文描述： | FLUORESCENT LIGHT CONTROLLER, 70 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | ROHS COMPLIANT, PLASTIC, TSSOP-24 |
| 文件頁數(shù)： | 1/15頁 |
| 文件大?。?/td> | 624K |
| 代理商： | LX1688IPW |
Microsemi
Integrated Products, Power Management
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2001
Rev. 1.1a, 2003-03-21
W
M
.
C
RangeMAX
LX1688
M
ULTIPLE
L
AMP
CCFL
C
ONTROLLER
I N T E G R A T E D P R O D U C T S
D E S C R I P T I O N
The LX1688 is a fixed frequency
,
dual current/voltage mode, switching
regulator that provides the control
function for Cold Cathode Fluorescent
Lighting (CCFL). This controller can
be used to drive a single lamp, but is
specifically designed for multiple lamp
LCD panels. The IC can be configured
as a master or slave and synchronize up
to 12 controllers.
The LX1688 includes highly
integrated
universal ‘PWM or DC’
dim input that allows either a PWM or
DC input to adjust brightness without
requiring external conditioning, since a
single external capacitor CPWM can
be used to integrate a PWM input.
Burst mode dimming is possible if the
user supplies a low frequency PWM
signal on the BRITE input and no
CPWM
capacitor
controller utilizes Linfinity’s patented
direct drive fixed frequency topology
and patented resonant lamp strike
is
used.
The
generation technique.
Safety
include
a dual feedback control loop that
permits regulation of maximum lamp
strike voltage as well as lamp current.
Regulating maximum lamp voltage
permits the designer to provide for ample
worst-case lamp strike voltage while
conservatively limiting maximum open
circuit voltage. In addition the controller
features include auto shutdown for an
open or broken lamp, and a lamp fault
detection with a status reporting output.
To improve design flexibility the IC
includes the ability to select the polarity
of both the chip enable and dim (BRITE)
inputs. Also included is a switched VDD
output of up to 10mA that will allow the
user to power other circuitry that can be
switched on and off with the inverters
enable input. This preserves the micro
power sleep mode with no additional
components.
and
reliability
features
IMPORTANT:
For the most current data, consult
MICROSEMI
’s website:
http://www.microsemi.com
K E Y F E A T U R E S
Provision to synchronize lamp
current & frequency with other
controllers
Dimming with analog or digital
(PWM) methods (>20:1)
Programmable Fixed frequency
Adjustable Power-up reset
ENABLE/BRITE Polarity Selection
Voltage limiting on step-up
transformer secondary winding
Open lamp timeout circuitry
Switched VDD output (10mA)
Micro-Amp Sleep Mode
Operates with 3.3V to 5V Supply
100mA output drive capability
APPLICAT IONS /BENEFIT S
Desktop LCD Monitors
Multiple lamp panels
Low Ambient Light Displays
High Efficiency
Lower Cost than Conventional
Buck/Royer Inverter Topologies
Improved Lamp Strike Capability
Improved Over-Voltage Control
PACK AGE ORDER INFO
T
J
(
°
C)
M
IN
V
DD
M
AX
V
DD
PW
5.5V
5.5V
Plastic TSSOP
24-Pin
LX1688CPW
LX1688IPW
0 to 70
-40 to 85
3.0V
3.0V
P R O D U C T H I G H L I G H T
1
2
1
LX1688
MASTER
F
1
2
1
LX1688
SLAVE
F
FAULT 1
FAULT 2
R
P
INPUT
CONNECTOR
LAMPS
DIMMING (BRITE)
ENABLE
BRITE
ENABLE
FAULT 1
FAULT 2
VDD
STRIKE
STATUS
STRIKE
STATUS
Ch2
10.0mV
M 100μs
Ch3
10.0mV
Simplified quad lamp inverter showing synchronized output waveforms
L
X
1
6
8
8
125 Hz 5% Duty cycle Burst
65KHz run frequency
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| LX1688IPW-TR | 制造商:Microsemi Corporation 功能描述:CCFL Controller 3.3V/5V 24-Pin TSSOP T/R 制造商:Microsemi Corporation 功能描述:CCFL DRVR 5.5V 24TSSOP - Tape and Reel |
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| LX1689CPW | 功能描述:IC CTRLR CCFL BACKLIGHT 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 照明，鎮(zhèn)流器控制器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 類型:CCFL 控制器 頻率:40 ~ 80 kHz 電流 - 電源:5mA 電流 - 輸出:- 電源電壓:4.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:16-SOIC 包裝:帶卷 (TR) 其它名稱:90-3991V+V01 |
| LX1689CPW-TR | 制造商:Microsemi Corporation 功能描述:CCFL DRVR 28V 20TSSOP - Tape and Reel 制造商:Microsemi Corporation 功能描述:DIRECT DRIVE CONTROLLER |
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