VOM1271
www.vishay.com
Vishay Semiconductors
Photovoltaic MOSFET Driver with Integrated Fast Turn-Off,
Solid-State Relay
FEATURES
• Open circuit voltage at I
F
= 10 mA, 8.4 V typical
1
Turn
Off
2
i179066_6
4
• Short circuit current at I
F
= 10 mA, 15 μA typical
• Isolation test voltage 4500 V
RMS
• Logic compatible input
• High reliability
• Integrated rapid turn-off circuitry
• Material categorization:
For definitions of compliance please see
www.vishay.com/doc?99912
3
DESCRIPTION
The VOM1271 is a stand-alone optically isolated MOSFET
driver. Unlike conventional MOSFET drivers, which require
an external power supply to provide V
CC
and or V
DD
rails to
the driver itself, the VOM1271 obtains all the required
current to drive its internal circuitry from the LED current on
the low voltage primary side of the isolation barrier. This
saves the designer the space and cost associated with
providing one or more external power supplies. The
VOM1271 also integrates a turn-off circuit internal to the
component itself, thus doing away with the need for
additional components in order to increase the overall
switching speed by decreasing the turn-off time. These
features, combined with a small SOP4 package, provide
designers with a small footprint, highly integrated isolated
gate driver solution for a large variety of MOSFET drive
applications.
APPLICATIONS
• High-side driver
• Solid-state relays
• Floating power supply
• Power control
• Data acquisition
• ATE
• Isolated solenoid drivers
• Isolated high current relay drivers
• Isolated high voltage relay drivers
AGENCY APPROVALS
The safety application model number covering all products
in this datasheet is VOM1271. This model number should be
used when consulting safety agency documents.
• UL1577
• cUL, equivalent to CSA bulletin 5A
• FIMKO EN 60950-1
SAFETY AGENCY COMPLIANCE
Please see document:
www.vishay.com/doc?83743
ORDERING INFORMATION
V
O
M
1
PART NUMBER
2
7
1
T
TAPE
AND
REEL
UL, cUL, FIMKO
VOM1271T
SOP-4
7.21 mm
PACKAGE
SOP-4
Note
• For additional information on the available options refer to option information. The product is available only on tape and reel.
Rev. 1.6, 07-Jan-14
Document Number: 83469
1
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
VOM1271
www.vishay.com
Vishay Semiconductors
TEST CONDITION
SYMBOL
I
F
I
R
≤
10 μA
V
R
T
amb
T
stg
t
≤
10 s max.
t=1s
T
sld
V
ISO
VALUE
50
5
- 40 to + 100
- 40 to + 125
260
4500
UNIT
mA
V
°C
°C
°C
V
RMS
ABSOLUTE MAXIMUM RATINGS
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
SSR
LED input ratings continous forward current
LED input ratings reverse voltage
Ambient operating temperature range
Storage temperature range
Pin soldering temperature
(1)
Isolation test voltage
between emitter and detector
Notes
• Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. Functional operation of the device is not
implied at these or any other conditions in excess of those given in the operational sections of this document. Exposure to absolute
maximum ratings for extended periods of the time can adversely affect reliability.
(1)
Refer to reflow profile for soldering conditions for surface mounted devices (SOP).
ELECTRICAL CHARACTERISTICS
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
LED forward voltage
TEST CONDITION
I
F
= 10 mA
I
F
= 5 mA
Open circuit voltage
I
F
= 10 mA
I
F
= 20 mA
I
F
= 30 mA
I
F
= 5 mA
Short circuit current
I
F
= 10 mA
I
F
= 20 mA
I
F
= 30 mA
SYMBOL
V
F
V
OC
V
OC
V
OC
V
OC
I
SC
I
SC
I
SC
I
SC
6.0
7.8
MIN.
1.2
TYP.
1.4
8.1
8.4
8.7
8.9
7.0
15.0
30.0
47.0
MAX.
1.6
UNIT
V
V
V
V
V
μA
μA
μA
μA
Note
• Minimum and maximum values are testing requirements. Typical values are characteristics of the device and are the result of engineering
evaluations. Typical values are for information only and are not part of the testing requirements.
SWITCHING CHARACTERISTICS
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
Turn-on time
Turn-off time
TEST CONDITION
C
L
= 200 pF, I
F
= 20 mA,
P
W
= 2 ms, duty cycle = 50 %
SYMBOL
t
on
t
off
MIN.
TYP.
53
24
MAX.
UNIT
μs
μs
VOM1271T
1
4
t
on
200 pF
I
F
Turn
OFF
10 MΩ
V
OC
, I
SC
90 %
t
off
10 %
Output
2
3
Fig. 1 - t
on
, t
off
Test Circuit and Waveforms
Rev. 1.6, 07-Jan-14
Document Number: 83469
2
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
VOM1271
www.vishay.com
Vishay Semiconductors
TEST CONDITION
IEC 68 part 1
Insulation group IIIa
CTI
V
IOTM
V
IORM
P
SO
I
SI
T
SI
5
5
175
SYMBOL
MIN.
TYP.
40/100/21
399
6000
630
350
150
175
V
V
mW
mA
°C
mm
mm
MAX.
UNIT
SAFETY AND INSULATION RATINGS
PARAMETER
Climatic classification (according to IEC 68 part 1)
Comparative tracking index
Transient overvoltage
Recurring peak voltage
Package safety power
Package safety current
Package safety temperature
Creepage distance
Clearance distance
TYPICAL CHARACTERISTICS
(T
amb
= 25 °C, unless otherwise specified)
10
9
8
7
5
4
3
2
1
0
0
5
10 15 20 25 30 35 40 45 50
12
R
L
= 1 MΩ
11
10
V
OC
vs. I
F
(V)
R
L
= 500 kΩ
V
OC
(V)
6
9
8
7
6
5
4
- 40 - 20
0
20
I
F
= 10 mA
I
F
= 30 mA
I
F
= 5 mA
40
60
80
100
I
F
(mA)
Fig. 2 - Output Open Circuit Voltage vs. LED Current
Ambient Temperature (°C)
Fig. 4 - Output Open Circuit Voltage vs. Ambient Temperature
60
50
600
500
I
F
= 30 mA
30
20
10
t
on
, t
off
(μs)
I
F
= 10 mA
40
400
300
200
I
SC
(μA)
t
on
100
I
F
= 5 mA
0
- 40 - 20
0
20
40
60
80
100
0
0
t
off
5
10 15 20 25 30 35 40 45 50
Ambient Temperature (°C)
Fig. 3 - Output Short-Circuit Current vs. Ambient Temperature
I
F
(mA)
Fig. 5 - t
on
, t
off
vs. LED Current
Rev. 1.6, 07-Jan-14
Document Number: 83469
3
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
VOM1271
www.vishay.com
Vishay Semiconductors
I
SC
-
Short
Circuit Output Current (μA)
80
70
60
50
40
30
20
10
0
0
1
2
3
4
5
6
7
8
9
10
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
20
I
F
= 45 mA
I
F
= 35 mA
I
F
= 25 mA
I
F
= 15 mA
I
F
= 5 mA
I
R
(μA)
0 °C
100 °C
21
22
23
24
25
V
R
(V)
Fig. 6 - LED Reverse Current vs. Reverse Voltage
V
OC
- Open Circuit Output Voltage (V)
Fig. 8 - Short Circuit Output Current vs.
Open Circuit Output Voltage
1.6
0 °C
1.5
25 °C
1.4
V
F
(V)
1.3
1.2
1.1
1.0
0
5
100 °C
10 15 20 25 30 35 40 45 50
I
F
(mA)
Fig. 7 - LED Forward Voltage vs. LED Forward Current
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.
2 MΩ
+
–
P-channel
JFET
Channel 1
control
Switch
1
N-channel
MOSFETs
Fig. 9 - Typical MOSFET Driver Application without Integrated Fast Turn-Off
Rev. 1.6, 07-Jan-14
Document Number: 83469
4
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
VOM1271
www.vishay.com
Vishay Semiconductors
VOM1271
1
+
TURN
OFF
4
1
VOM1271
+
TURN
OFF
4
2
-
2
3
-
3
Bidirectional MOSFET Driver Application
Single
MOSFET Driver Application
Fig. 10 - Typical MOSFET Driver Applications with Integrated Fast Turn-Off
PACKAGE DIMENSIONS
in millimeters
PACKAGE MARKING
(example)
M1271
V YWW
68
Pin One Dimple
Rev. 1.6, 07-Jan-14
Document Number: 83469
5
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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