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Dual High Voltage Isolated MOSFET Driver
Ordering Information
Input to Output Package Option
Isolation Voltage
±400V HT0440LG
8-Pin Narrow Body SOIC
HT0440
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
Input to Output Isolation Voltage, V
Logic Input Voltage, VA, V
B
Operating Temperature –40°C to +85°C
ISO
1
±400V
–0.5 to +7.0V
General Description
The Supertex HT0440 is a dual high voltage isolated driver
utilizing Supertex’s proprietary HVCMOS
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 independent DC isolated voltages to the outputs, V
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 characteristics 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.
®
technology. It is de-
OUTA
and V
OUTB
when
Pin Configuration
Storage Temperature –55°C to +150°C
Soldering Temperature
Note:
1. All voltages are referenced to ground.
2. Distance of 1.6mm from case for 10 seconds.
2
300°C
CLK GND
–V
OUTA
+V
OUTA
1
AB
2
3
4
8
7
6
–V
OUTB
5
+V
OUTB
top view
SO-8
For detailed circuit and application information, please
refer to application note #AN-D26.
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.
Note: See Package Outline section for dimensions.
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Electrical Characteristics
(Over recommended operating conditions, TA = 25°C unless otherwise specified)
DC Characteristics
Symbol Parameter Min Typ Max Unit Conditions
I
+ I
IHA
IHB
V
, Output Voltage 6.0 V VA = 3.15V, VB = 3.15V,
OUTA
V
OUTB
I
ILA
I
ILB
I
ILQ
V
ISO
V
CISO
Total logic high input current 300 µAVA = 3.5V, VB = 3.5V, CLK = 0V
500 µAVA = 3.5V, VB = 3.5V,
CLK = 500KHz
2.0 mA VA = 3.5V, VB = 3.5V,
CLK = 2.0MHz
1.0 mA VA = 5.5V, VB = 5.5V, CLK = 0V
2.0 mA VA = 5.5V, VB = 5.5V,
CLK = 500KHz
CLK = 0V, no load
5.0 V VA = 3.15V, VB = 3.15V,
CLK = 500KHz, no load
6.0 V VA = 3.15V, VB = 3.15V,
CLK = 2.0MHz, no load
10.0 V VA = 4.5V, VB = 4.5V,
CLK = 0V, no load
8.0 V VA = 4.5V, VB = 4.5V,
CLK = 500KHz, no load
Logic low input A current 10 µAVA = 0.5V, VB = high
Logic low input B current 10 µAVA = high, VB = 0.5V
Quiescent current 10 µAVA = 0.5V, VB = 0.5V
Input to output isolation voltage ±400 V
Output to output isolation voltage ±700 V
HT0440
AC Characteristics
Symbol Parameter Min Typ Max Unit Conditions
t
d(ON)
t
r
t
d(OFF)
t
f
Turn on delay time 50 µs See timing diagram and test circuit
Rise time 650 µs CLK = 0V, CL = 600pF
Turn off delay time 150 µs
Fall time 3.0 ms
Recommended Conditions
Symbol Parameter Min Typ Max Unit Conditions
CLK External clock frequency 0.5 2.0 MHz
V
V
V
V
T
IHCLK
ILCLK
IH
IL
A
Clock input high voltage 3.15 5.5 V
Clock input low voltage 0 0.5 V
Logic input high voltage 3.15 5.5 V
Logic input low voltage 0 0.5 V
Operating temperature -40 +85 °C
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Truth Table
HT0440
ABCLK V
AV
OUT
B Internal Clock
OUT
000OffOff Off
00OffOnOn
00OnOff On
110OnOn On
00Clk Off Off Off
0 Clk Off On Off
0 Clk On Off Off
11Clk On On Off
Block Diagram
Isolation
CLK
2
Barrier
A
B
GND
Timing Diagram
VA, V
1
8
7
4.5V
0V
R
4
Driver
Logic &
Internal
Clock
B
50% 50%
A
Driver
B
90%
10R
R
R
10R
R
R=158KΩ ±47%
90%
+
V
OUTA
3
–
5
+
V
OUTB
6
–
V
OUTA
, V
OUTB
10%
t
d(ON)tr
10%
t
d(OFF)tf
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Test Circuit
HT0440
4.5V
1
A
0V V
B
8
HT0440
2
CLK
GND
7
V
OUTA
OUTB
4
+
–
3
CL =
V
OUTA
600pF
5
+
–
6
CL =
V
OUTB
600pF
©2001 Supertex Inc. All rights reserved. Unauthorized use or reproduction prohibited.
12/13/010
1235 Bordeaux Drive, Sunnyvale, CA 94089
TEL: (408) 744-0100 • FAX: (408) 222-4895
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www.supertex.com
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