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top view
SO-8
HT0440
Dual High Voltage Isolated MOSFET Driver
Ordering Information
Features
400V input to output isolation
700V isolation between outputs
No external voltage supply required
Dual isolated output drivers
Option of internal or external clock
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
A
, V
B
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.
Pin Configuration
For detailed circuit and application information, please
refer to application note #AN-D26.
General Description
The Supertex HT0440 is a dual high voltage isolated driver
utilizing Supertex's proprietary HVCMOS
technology. It is de-
signed to drive discrete MOSFETs configured as bi-directional or
unidirectional switches. It can drive N-channel MOSFETs as high
side switches up to 400V. The HT0440 generates two indepen-
dent DC isolated voltages to the outputs, V
OUTA
and V
OUTB
when
logic inputs A and B are at logic high. The internal clock of the
HT0440 can be disabled by applying an external clock signal to
the CLK pin. This allows the power dissipation and AC character-
istics to be tailored to meet specific needs. The CLK pin should be
connected to ground when not in use. The HT0440 does not
require any external power supplies. The internal supply voltage
is supplied by either of the two logic inputs A or B when they are
at logic high.
A
B
CLK
GND
V
OUTA
V
OUTB
+V
OUTA
+V
OUTB
Input to Output
Package Option
Isolation Voltage
8-Pin Narrow Body SOIC
400V
HT0440LG
Note: See Package Outline section for dimensions.
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.
2
Electrical Characteristics
(Over recommended operating conditions, T
A
= 25C unless otherwise specified)
DC Characteristics
Symbol
Parameter
Min
Typ
Max
Unit
Conditions
I
IHA
+ I
IHB
Total logic high input current
300
A
V
A
= 3.5V, V
B
= 3.5V, CLK = 0V
500
A
V
A
= 3.5V, V
B
= 3.5V,
CLK = 500KHz
2.0
mA
V
A
= 3.5V, V
B
= 3.5V,
CLK = 2.0MHz
1.0
mA
V
A
= 5.5V, V
B
= 5.5V, CLK = 0V
2.0
mA
V
A
= 5.5V, V
B
= 5.5V,
CLK = 500KHz
V
OUTA
,
Output Voltage
6.0
V
V
A
= 3.15V, V
B
= 3.15V,
V
OUTB
CLK = 0V, no load
5.0
V
V
A
= 3.15V, V
B
= 3.15V,
CLK = 500KHz, no load
6.0
V
V
A
= 3.15V, V
B
= 3.15V,
CLK = 2.0MHz, no load
10.0
V
V
A
= 4.5V, V
B
= 4.5V,
CLK = 0V, no load
8.0
V
V
A
= 4.5V, V
B
= 4.5V,
CLK = 500KHz, no load
I
ILA
Logic low input A current
10
A
V
A
= 0.5V, V
B
= high
I
ILB
Logic low input B current
10
A
V
A
= high, V
B
= 0.5V
I
ILQ
Quiescent current
10
A
V
A
= 0.5V, V
B
= 0.5V
V
ISO
Input to output isolation voltage
400
V
V
CISO
Output to output isolation voltage
700
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
CLK = 0V, C
L
= 600pF
t
d(OFF)
Turn off delay time
150
s
t
f
Fall time
3.0
ms
Recommended Conditions
Symbol
Parameter
Min
Typ
Max
Unit
Conditions
CLK
External clock frequency
0.5
2.0
MHz
V
IHCLK
Clock input high voltage
3.15
5.5
V
V
ILCLK
Clock input low voltage
0
0.5
V
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
HT0440
4
Test Circuit
HT0440
V
OUTA
HT0440
C
L
=
600pF
V
OUTB
C
L
=
600pF
4.5V
0V
V
OUTA
+
A
1
8
2
7
4
3
5
6
B
V
OUTB
+
CLK
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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