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參數資料
| 型號： | LX1689CPW |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩壓器 |
| 英文描述： | Third Generation CCFL Controller |
| 中文描述： | FLUORESCENT LIGHT CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | ROHS COMPLIANT, PLASTIC, TSSOP-20 |
| 文件頁數： | 1/15頁 |
| 文件大小： | 329K |
| 代理商： | LX1689CPW |
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2000
Rev. 1.0b, 2003-03-31
W
M
.
C
LX1689
Third Generation CCFL Controller
P
RODUCTION
D
ATA
S
HEET
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 LX1689 is the latest generation
Direct Drive CCFL (Cold Cathode
Fluorescent Lamp) Controller. It uses
new circuit design techniques (patents
pending) and combines digital and linear
circuits with an advanced BiCMOS
process to create a more complete
controller in a small package.
When compared to the original
LX1686
design,
applications use from 12 to 30 less
components.
New
enhancements have been added to make
the LX1689 even easier to use.
The on-chip PLL circuit used to
synchronize the digital dimming burst
frequency to the video frame rate, as
used in the LX1686, is replaced with a
programmable counter. This counter can
divide the video controller horizontal
sync pulse, other external clock source
or the internal chip clock source to
generate the burst frequency.
identical
module
functions
and
The brightness control input allows the
use of either a DC voltage or a PWM
input to simplify design. Programmable
polarity brightness control is retained,
except in the case of externally clocked
digital dimming. Two onboard LDO
regulators extend the input voltage range
of the IC up to 28 Volts without using
external circuitry as was required with our
previous controllers. The LX1689
includes a new lamp strike detection
scheme that saves a package pin and three
external components. Internal circuits
monitor lamp current pulses at the I_SNS
input to determine if the lamp strikes and
if it stays ignited once operational.
Integrating full wave rectifiers for
each of three lamp inputs has significantly
reduced the lamp feedback component
count.
In addition the controller features
include auto shutdown for open or broken
lamps, and a lamp fault detection with a
status reporting output.
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
3 to 28 Volt Single Fixed (±20%)
Supply Operating Range
Selectable Analog/Digital
Dimming Modes
Digital Dimming Can Synch to
External Or Internal Clocks
User Programmable Digital
Dimming Burst Frequency
252 mS Power On Delay
Flexible Lamp Current
Compensation Input
Open Lamp Shutdown and Fault
Output Indicator
“On Chip” Full Wave Lamp
Current & Voltage Rectifiers
20 Pin TSSOP Package
B E N E F I T S
Low Component Count /
Module Cost / Size
High “Nits/Watt” Efficiency
Operates Directly From 1 to 6
Li_Ion Cells
Lamp Current Compensation
Input Makes Indoor/Outdoor
And Wide Temperature Range
Applications Easy to Design
P R O D U C T H I G H L I G H T
LX1689 CCFL Inverter Layouts Examples*
*As Shown in Figure 1 (Typical Application)
Bill of Materials
1
LX1689CPW
1
Transformer
1
Dual FET
2
Connectors
7
Resistors
9
Capacitors
21
Total Count
P A C K A G E O R D E R I N F O
T
J
(
°
C)
M
IN
V
DD
M
AX
V
DD
PW
Plastic TSSOP
20-PIN
LX1689CPW
LX1689IPW
0 to 70
-40 to 85
3V
3V
28V
28V
Note: Available in Tape & Reel.
Append the letter “T” to the part number. (i.e. LX1689CPWT)
L
X
1
6
8
9
2.64in.
(67mm)
1.38in.
(35mm)
.870 in.
(22mm)
.397 in
.
(10mm)
Actual Inverter Size
Actual Inverter Size
OR
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PDF描述 |
|---|---|
| LX1689 | Third Generation CCFL Controller |
| LX1732 | High Current PFM Boost Converter |
| LX1732CDU | High Current PFM Boost Converter |
| LX1742 | High Efficiency High Voltage Boost Controller |
| LX1744 | Dual Output Boost ? LED Driver / LCD Bias |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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，鎮流器控制器 系列:- 產品培訓模塊: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 |
| LX1689IPWTR | 制造商:Microsemi Corporation 功能描述:CCFL Controller 3.3V/5V/9V/12V/15V/18V/24V 20-Pin TSSOP T/R |
| LX1689IPW-TR | 制造商:Microsemi Corporation 功能描述:CCFL DRVR 28V 20TSSOP - Tape and Reel |
| LX1691 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:Enhanced Multi-Mode CCFL Controller |
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