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LX1994 Datasheet

  • LX1994

  • Microsemi Corporation [High Efficiency LED Driver]

  • 306.58KB

  • MICROSEMI

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LX1994
TM
廬
High Efficiency LED Driver
P
RODUCTION
D
ATA
S
HEET
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature -40擄C
鈮?/div>
T
A
otherwise noted and the following test conditions:
V
IN
= 3.6V, I
LOAD
= 20mA
鈮?/div>
85擄C except where
WWW .
Microsemi
.C
OM
Parameter
Operating Voltage
Minimum Start-up Voltage
Start-up Voltage Temperature
Coefficient
Quiescent Current
BRT Full scale bias current
BRT Light sensor current
S/P Logic Low Voltage
S/P Logic High Voltage
S/P Input DC Bias Current
S/P PWM frequency
S/P Pulse Width
BRT PWM Voltage
BRT PWM Voltage
Feedback Comparator Offset
SCR peak current
Efficiency
DRV Sink/Source Current
Maximum Switch On-Time
Minimum Switch Off-Time
OVP Threshold Voltage
OVP Input Bias Current
Symbol
V
IN
T
A
= +25擄C
Test Conditions
LX1994
Min
Typ Max
2.0
5.5
2.0
-2
100
7.5
0.35
10.5
110
200
1
13.5
0.6
Units
V
V
mV/擄C
碌A
碌A
碌A
碌A
V
V
碌A
KHz
ns
mV
mV
mV
mA
%
mA
碌s
ns
V
nA
For Reference Only
I
Q
IBRT
IBRT
V
S/P
V
S/P
SHDN = VIN, No external FET
SHDN = GND
S/P = VIN, VBRT = GND, ILS = 0A
S/P = VIN, VBRT = GND, ILS = 100碌A
1.4
-1
10
50
270
S/P =
VIN
0.05
1
1000
330
VBRT
VBRT
VOS
IPK
畏
t
ON
t
OFF
V
OVP
I
OVP
VS/P = VIN (DCS/P = 100%)
DCS/P = 50%, FPWM = 100KHZ
VFB 鈥?VBRT, VBRT = 0mV
HYST mode; T
A
= +25擄C
VOUT = 18V, I
LOAD
= 20mA, V
IN
= 5.0V
180
140
10
240
1.10
-50
300
150
4
240
92
200
15
350
1.22
300
V
OVP
= 1V
20
460
1.34
50
E
LECTRICALS
E
LECTRICALS
Copyright
漏
2003
Rev. 1.0a, 2004-08-10
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3

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