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參數(shù)資料
| 型號： | LX1994 |
| 廠商： | Microsemi Corporation |
| 英文描述： | High Efficiency LED Driver |
| 中文描述： | 高效率LED驅(qū)動器 |
| 文件頁數(shù)： | 1/13頁 |
| 文件大?。?/td> | 309K |
| 代理商： | LX1994 |
LX1994
P
RODUCTION
D
ATA
S
HEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
W
M
.
C
High Efficiency LED Driver
Copyright
2003
Rev. 1.0a, 2004-08-10
TM
D E S C R I P T I O N
Microsemi’s LX1994 is a compact,
high
efficiency,
controller which is designed to drive a
string of white or colored LED’s in a
backlight or front light system. The
LX1994 design is based on a dual
mode PFM architecture and provides
maximum typical efficiency greater
than 92%.
The LX1994 has many unique
design features and advantages over
competitor solutions. The features
included: low quiescent current
(100μA typical), low shut down
current (<1μA), dedicate ambient light
sensor
interface
dimming modes, low voltage and low
offset current sense, and integrated
OVP protection.
The
converter
efficiency, low cost, and flexible
design by selection of an external N-
Channel MOSFET, current sense
resistors,
and
protection.
IMPORTANT:
For the most current data, consult
MICROSEMI
’s website:
http://www.microsemi.com
step-up
boost
(LX1970),
dual
achieves
high
integrated
OVP
The use of external N-channel
MOSFET allows design to optimize
system efficiency.
The OVP protection comparator
eliminates the need of an external Zener
diode clamp. The OVP function can be
scaled
for
any
Maximum output current is achievable
by selection of the current sense
resistor. These features make the
controller ideal for PDA or digital
camera applications
To enhance system battery life, the
LX1994 provides 2 dimming options
and a dedicated ambient light sensor
(LX1970) interface.
The LX1994 supports a wide range
of system battery voltage inputs which
ranges from 2.0 to 5.5V. The LX1994
is guaranteed to start up at 2.0V input.
The LX1994 is available in miniature
10-pin MLP or MSOP packages.
output
voltage.
K E Y F E A T U R E S
Efficiency > 92%
Dual PFM Architecture To
Extend Battery Life
V
IN
Range 2.0V To 5.5V. Start
Up Warranty @ 2.0V
Logic Control Shutdown
100μA Typical Quiescent
Current
Shutdown I
Q
Current <1μA
OVP For Open String Output
Voltage
Low Voltage And Offset
Current Sense
Light Sensor (LX1970)
interface
Dual Dimming Options (PWM
or DC Voltage)
No External Zener Clamp
Diode
10-Pin MLP or MSOP
A P P L I C A T I O N S
Pagers
PDA
Cell Phone
Portable Display
Digital Cameras
P R O D U C T H I G H L I G H T
DRV
SRC
OVP
S/P
VIN
BRT
V
IN
= 2.0V to 5.5V
GND
LX1994
FB
33μH
FDV303
UPS5819
LS
SNK
SRC
VSS
VDD
LX1970
3V
CMP
Auto Adjust for
Ambient Light
P A C K A G E O R D E R I N F O
LD
10-Pin
LX1994CLD
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e.
LX1994CDU-TR)
T
A
(
°
C)
Plastic MLP
DU
Plastic MSOP
10-Pin
LX1994CDU
-40 to 85
L
X
1
9
9
4
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LX1994CDU | High Efficiency LED Driver |
| LX1994CLD | High Efficiency LED Driver |
| LX5203 | 9-LINE SCSI ACTIVE TERMINATOR |
| LX5203CDP | 9-LINE SCSI ACTIVE TERMINATOR |
| LX5203CN | 9-LINE SCSI ACTIVE TERMINATOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LX1994_06 | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:High Efficiency LED Driver |
| LX1994CDU | 制造商:MICROSEMI 制造商全稱:Microsemi Corporation 功能描述:High Efficiency LED Driver |
| LX1994CDU-TR | 制造商:Microsemi Corporation 功能描述:LED DRVR 2SEGMENT 2V TO 5.5V 10MSOP - Tape and Reel |
| LX1994CLD | 制造商:Microsemi Corporation 功能描述:LED DRVR 2SEGMENT 2V TO 5.5V 10MSOP - Bulk |
| LX1994CLD-TR | 制造商:Microsemi Corporation 功能描述:LED DRVR 2SEGMENT 2V TO 5.5V 10MSOP - Tape and Reel |
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