Datasheet

LH1540AAB, LH1540AABTR, LH1540AT
www.vishay.com
Vishay Semiconductors
Rev. 1.9, 25-Jul-11
3
Document Number: 83833
For technical questions, contact: [e-mail]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
TYPICAL CHARACTERISTICS (T
amb
= 25 °C, unless otherwise specified)
Fig. 1 - Recommended Operating Conditions
Fig. 2 - LED Voltage vs. Temperature
Fig. 3 - LED Dropout Voltage vs. Temperature
Fig. 4 - LED Current for Switch Turn-on vs. Temperature
SAFETY AND INSULATION RATINGS
PARAMETER TEST CONDITION SYMBOL VALUE UNIT
Climatic classification IEC 68 part 1 40/85/21
Pollution degree DIN VDE 0109 2
Tracking resistance
(comparative tracking index)
Insulation group llla CTI 175
Highest allowable overvoltage Transient overvoltage V
IOTM
8000 V
peak
Max. working insulation voltage Recurring peak voltage V
IORM
890 V
peak
Insulation resistance at 25 °C
V
IO
= 500 V
R
IS
 10
12

Insulation resistance at T
S
R
IS
 10
9

Insulation resistance at 100 °C R
IS
 10
11

Partial discharge test voltage Methode a, V
pd
= V
IORM
x 1.875 V
pd
1669 V
peak
Safety limiting values -
maximum values allowed
in the event of a failure
Case temperature T
SI
175 °C
Input current I
SI
300 mA
Output power P
SO
700 mW
Minimum external air gap (clearance)
Measured from input terminals to output
terminals, shortest distance through air
 7mm
Minimum external tracking (creepage)
Measured from input terminals to output
terminals, shortest distance path along body
 7mm
i1540at_00
80
60
0
40
120
100
20
0 20406080- 20- 40
Load Current (mA)
Ambient Temperature (°C)
I
FON
= 2.0 mA
I
FON
= 3.0 mA
I
FON
= 4.0 mA
I
FON
= 5.0 mA
to 20 mA
i1540at_01
T
A
- Ambient Temperature (°C)
LED Forward Voltage (V)
200- 20- 40
1.6
1.5
1.4
1.3
1.2
1.1
1.0
I
F
= 50 mA
I
F
= 20 mA
I
F
= 1.0 mA
I
F
= 2.0 mA
I
F
= 5.0 mA
I
F
= 10 mA
40 60 80
i1540at_02
- 40 20
Ambient Temperature (°C)
1.20
1.15
1.10
0.95
1.00
40
1.05
8060- 20 0
Min.
Typ.
I
L
= 100 mA
LED Forward Voltage (V)
i1540at_03
Ambient Temperature (°C)
100
- 60
80
60
40
- 40
- 40 - 20 0 20 40 60 80
20
- 20
0
I
L
= 100 mA
LED Forward Current for Switch
Turn-on (%), Normalized to 25 °C