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參數(shù)資料
| 型號： | LX1992 |
| 廠商： | Microsemi Corporation |
| 英文描述： | High Efficiency LED Driver |
| 中文描述： | 高效率LED驅(qū)動(dòng)器 |
| 文件頁數(shù)： | 3/11頁 |
| 文件大小： | 335K |
| 代理商： | LX1992 |
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
Copyright
2000
Rev. 1.1b, 2005-03-03
W
M
.
C
LX1992
High Efficiency LED Driver
P
RODUCTION
D
ATA
S
HEET
TM
E L E C T R I C A L C H A R A C T E R I S T I C S
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0
°
C
≤
T
A
≤
70
°
C except where
otherwise noted and the following test conditions:
V
IN
= 3V, I
LOAD
= 20mA
,
SHDN
= V
IN
,
and
V
ADJ
= 300mV.
LX1992
Typ
Parameter
Symbol
Test Conditions
Min
Max
Units
`
Operating Voltage
Minimum Start-up Voltage
Start-up Voltage Temperature
Coefficient
V
IN
V
SU
T
A
= +25
°
C
1.6
6.0
1.6
V
V
k
VST
-2
mV/
°
C
μ
A
μ
A
mV
nA
V
nA
nA
V
V
μ
A
mA
%
mA
mA
ns
V
FB
> 0.3V
V
SHDN
< 0.4V
V
FB
= 0.3V
I
OUT
= (V
ADJ
)/(R
SET
)
VADJ < 0.3V
SHDN
= GND
VFB < 0.3V
R
CS
= 560
V
IN
= 3.0V, I
LOAD
= 20mA
V
IN
= 5V
V
IN
= 5V
V
FB
= 0.3V; V
ADJ
=0.5V
50
0.2
300
5.0
85
50
100
100
0.5
325
100
V
IN
0
50
0.4
7.0
83
500
Quiescent Current
I
Q
FB Threshold Voltage
FB Input Bias Current
ADJ Input Voltage Range
ADJ Input Bias Current
Shutdown Input Bias Current
Shutdown High Input Voltage
Shutdown Low Input Voltage
Current Sense Bias Current
Minimum Peak Current
Efficiency
NDRV Sink Current
NDRV Source Current
Off-Time
V
FB
I
FB
V
ADJ
I
ADJ
I
SHDN
V
SHDN
V
SHDN
I
CS
I
MIN
η
I
SNK
I
SRC
t
OFF
275
-100
0.0
-150
-50
1.6
3.0
53
100
S I M P L I F I E D B L O C K D I A G R A M
Control
Logic
Reference
Logic
ADJ
FB
Shutdown
Logic
SHDN
CS
Driver
GND
DRV
IN
5μ
A
SRC
2.5M
50pF
A
B
E
L
E
C
T
R
I
C
A
L
S
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