LH1540ACD View Datasheet(PDF) - Vishay Semiconductors
Part Name
Description
Manufacturer
LH1540ACD Datasheet PDF : 4 Pages
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www.vishay.com
LH1540ACD, LH1540ACDTR
Vishay Semiconductors
FUNCTIONAL DESCRIPTION
Figure 1 shows the switch characteristics of the relays. The
relay exhibits an on-resistance that is exceptionally linear
through the origin and up to the knee current (IK). Beyond IK,
the incremental resistance decreases, minimizing internal
power dissipation. Overload currents are clamped at ILMT by
the internal current-limit circuitry. The current-limiting
circuitry exhibits a negative temperature coefficient, thereby
reducing the current- limit value when relay temperature is
increased. An extended clamp condition, which increases
relay temperature, decreases the current-limit value,
resulting in a current fold back characteristic. When the
overload is removed, the relay resumes its normal
on-resistance characteristic.
+I
210 mA
ILMT
10 Ω
-V 16 Ω
10 Ω
ILMT
ilh1540acd_01
60 mA
- 1.5 V
IK
IK
1.5 V
60 mA
- 210 mA
-I
16 Ω
+V
Fig. 1 - Typical AC/DC on Characteristics
In a 1 form A relay, to turn the relay on, forward current is
applied to the LED. The amount of current applied
determines the amount of light produced for the photodiode
array. This photodiode array develops a drive voltage for the
MOSFET switch outputs. For high temperature or high-load
current operations, more LED current is required.
PACKAGE DIMENSIONS in millimeters
8.53 ± 0.25
7.39 ± 0.25
i178023
ISO method A
1.09
0.84
10°
1.27 typ.
0.41 typ.
1.07 ref.
3.62
1.88
10°
0.15 typ.
0.38 ± 0.05
40°
Pin 1 I.D.
10°
1
5.84 2
5.59
3
10°
4
5.72
5.46
0.93 ± 0.05
0° to 10°
0.000
0.005
8
lead
7
coplanarity
0.08 max.
6
5
PACKAGE MARKING (example)
LH1540
V YWW S 68
Note
• Tape and reel suffix (TR) is not part of the package marking.
Rev. 1.7, 25-Jul-11
3
Document Number: 83843
For technical questions, contact: optocoupleranswers@vishay.com
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
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