1
HT0740
High Voltage Isolated MOSFET Driver
Ordering Information
General Description
The Supertex HT0740 is a single channel high voltage, low input
current isolated driver utilizing Supertex's proprietary HVCMOS
technology. It is designed to drive discrete MOSFETs configured
as high side switches up to 400V. The HT0740 generates an
independent DC isolated voltage across the pair of outputs when
the logic input is at a logic high. The HT0740 does not require any
external power supplies. The internal supply voltage is supplied
from the logic input when it is in the high state.
Features
400V input to output isolation
No external voltage supply required
Low input logic current, 500A max
Floating isolated output
5.0V logic compatible
Applications
Telecommunications
Modems
Solid state relays
High side switches
High end audio switches
Avionics
ATE
Absolute Maximum Ratings
1
Input to Output Isolation Voltage, V
ISO
400V
Logic Input Voltage, V
IN
0.5 to +7.0V
Operating Temperature
40C to +85C
Storage Temperature
55C to +150C
Soldering Temperature
2
300C
Note:
1. All voltages are referenced to ground.
2. Distance of 1.6mm from case for 10 seconds.
Input to Output
Package Option
Isolation Voltage
8-Pin Narrow Body SOIC
400V
HT0740LG
12/13/01
Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability
indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to
workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the
Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.
1
2
3
4
8
7
6
5
top view
SO-8
Pin Configuration
V
IN
N/C
NC
GND
-V
OUT
N/C
+V
OUT
N/C
2
Logic &
Internal
Clock
V
OUT
+
4
3
1
7
V
IN
GND
Isolation
Barrier
V
ISO
Driver
10R
R
R
R=158K 47%
Electrical Characteristics
(Over recommended operating conditions, T
A
= -40C to +85C unless otherwise specified)
DC Characteristics
Symbol
Parameter
Min
Typ
Max
Unit
Conditions
I
H
Logic input current high
500
A
V
IN
= 5.0V
I
LQ
Logic input current low (quiescent)
10
A
V
IN
= 0.5V
V
OUT
Output voltage across output terminals
4.5
V
V
IN
= 3.15V, No load
8.5
V
V
IN
= 4.5V, No load
V
IN
Input voltage for zero output
0.8
V
No load
V
ISO
Input to output isolation voltage
400
V
AC Characteristics
Symbol
Parameter
Min
Typ
Max
Unit
Conditions
t
d(ON)
Turn on delay time
50
s
See timing diagram and test circuit
t
r
Rise time
650
s
C
L
= 600pF, T
A
=25C
t
d(OFF)
Turn off delay time
150
s
t
f
Fall time
3.0
ms
Recommended Operating Conditions
Symbol
Parameter
Min
Typ
Max
Unit
Conditions
V
IH
Logic input high voltage
3.15
5.5
V
V
IL
Logic input low voltage
0
0.5
V
T
A
Operating temperature
-40
+85
C
Block Diagram
HT0740
3
90%
10%
50%
50%
90%
10%
4.5V
0V
V
OUT
t
d(ON)
t
r
t
d(OFF)
t
f
V
IN
Timing Diagram
Test Circuit
HT0740
V
OUT
HT0740
C
L
=
600pF
4.5V
0V
V
OUT
+
V
IN
4
1
7
3
GND
1235 Bordeaux Drive, Sunnyvale, CA 94089
TEL: (408) 744-0100 FAX: (408) 222-4895
www.supertex.com
12/13/010
2001 Supertex Inc. All rights reserved. Unauthorized use or reproduction prohibited.
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