HT0440
Dual High Voltage Isolated MOSFET Driver
Ordering Information
Input to Output
Isolation Voltage
±400V
Package Option
8-Pin Narrow Body SOIC
HT0440LG
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
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.
Applications
❏
❏
❏
❏
❏
❏
❏
Telecommunications
Modems
Solid state relays
High side switches
High end audio switches
Avionics
ATE
Pin Configuration
±400V
–0.5 to +7.0V
–40°C to +85°C
–55°C to +150°C
300°C
A
CLK
–V
OUTA
+V
OUTA
1
2
3
4
8
7
6
5
Absolute Maximum Ratings
1
Input to Output Isolation Voltage, V
ISO
Logic Input Voltage, V
A
, V
B
Operating Temperature
Storage Temperature
Soldering Temperature
2
Note:
1. All voltages are referenced to ground.
2. Distance of 1.6mm from case for 10 seconds.
B
GND
–V
OUTB
+V
OUTB
top view
SO-8
For detailed circuit and application information, please
refer to application note #AN-D26.
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
1
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.
SUPERTEX [ Supertex, Inc ]
