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VOM1271 Datasheet(PDF) 4 Page - Vishay Siliconix

Part No. VOM1271
Description  Photovoltaic MOSFET Driver with Integrated Fast Turn-Off, Solid-State Relay
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Maker  VISHAY [Vishay Siliconix]
Homepage  http://www.vishay.com
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VOM1271 Datasheet(HTML) 4 Page - Vishay Siliconix

   
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VOM1271
www.vishay.com
Vishay Semiconductors
Rev. 1.3, 29-Aug-12
4
Document Number: 83469
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
Fig. 6 - LED Reverse Current vs. Reverse Voltage
Fig. 7 - LED Forward Voltage vs. LED Forward Current
Fig. 8 - Short Circuit Output Current vs.
Open Circuit Output Voltage
APPLICATION DESCRIPTION
Figure 8 illustrates a standard isolated MOSFET driver such
as Vishay’s VO1263. Though these parts are generally
capable of supplying higher output current, they lack
integrated fast turn-off circuitry. Thus, if high turn-off speed
is required. external circuitry needs to be provided, as
illustrated in figure one.
Figure 9 illustrates the ability to do away with external
turn-off circuitry with the VOM1271, by taking advantage of
the VOM1271’s integrated turn-off circuitry.
Fig. 9 - Typical MOSFET Driver Application without Integrated Fast Turn-Off
0
2.0
20
22
24
25
VR (V)
1.6
1.4
1.2
1.0
0.8
21
23
1.8
0.6
0.4
0.2
100 °C
0 °C
1.0
1.6
010
20
50
IF (mA)
1.5
1.4
1.3
1.2
1.1
515
25
35
30
45
40
100 °C
0 °C
25 °C
0
10
20
30
40
50
60
70
80
0
1
2
3
4
5
6
7
8
9
10
V
OC - Open Circuit Output Voltage (V)
45 mA
35 mA
25 mA
15 mA
5 mA
P-channel
JFET
2 M
Ω
Channel 1
control
Switch 1
N-channel
MOSFETs
+


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