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參數(shù)資料
| 型號： | LX1688IPW-TR |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | FLUORESCENT LIGHT CONTROLLER, 70 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | ROHS COMPLIANT, PLASTIC, TSSOP-24 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 484K |
| 代理商： | LX1688IPW-TR |
RangeMAX
LX1688
PRODUCTION DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2001
Rev. 1.2, 2006-03-09
WWW
.Microse
m
i
.CO
M
Multiple Lamp CCFL Controller
TM
DESCRIPTION
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 is used. The
controller utilizes Microsemi’s patented
direct drive fixed frequency topology and
patented resonant lamp strike generation
technique.
Safety and reliability features 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.
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
KEY FEATUR ES
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
APPLICATIONS / BENEFITS
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
PRODUCT H I GHLIGHT
12
24
13
LX1688
MASTER
FET
S
12
24
13
LX1688
SLAVE
FET
S
FAULT 1
FAULT 2
R
A
M
P
R
E
SET
P
H
ASE
SYN
C
INPUT
CONNECTOR
LAMPS
DIMMING (BRITE)
ENABLE
BRITE
ENABLE
FAULT 1
FAULT 2
VDD
STRIKE
STATUS
STRIKE
STATUS
Ch2
10.0mV
Ω
M100s
Ch3
10.0mV
Ω
125 Hz 5% Duty cycle Burst
65KHz run frequency
Simplified Quad Lamp Inverter Showing Synchronized Output Waveforms
PACKAGE ORDER INFO
PW
Plastic TSSOP
24-Pin
TJ (°C)
MIN VDD
MAX VDD
RoHS compliant / Pb-free Transition DC: 0442
0 to 70
3.0V
5.5V
LX1688CPW
-40 to 85
3.0V
5.5V
LX1688IPW
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1688CPW-TR)
LL
XX
11
66
88
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LX1689 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:Third Generation CCFL Controller |
| LX1689_06 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:Third Generation CCFL Controller |
| 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(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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(yīng)商設(shè)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 |
| LX1689IPW | 功能描述:IC CTLR CCFL BACKLIGHT 20-TSSOP 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(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:16-SOIC 包裝:帶卷 (TR) 其它名稱:90-3991V+V01 |
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