Supertex inc.

Supertex inc.

www.supertex.com

HT0440

Doc.# DSFP-HT0440

D040313

Features

Applications

General Description

The Supertex HT0440 is a dual, high voltage, isolated

technology. It is designed to drive discrete MOSFETs

configured as bidirectional 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

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.

For detailed circuit application information, please refer

to application note AN-D26.

Block Diagram

Dual, High Voltage,

Isolated MOSFET Driver

+

V

-

4

3

5

6

2

1

8

7

CLK

A

B

GND

Isolation

Barrier

10R

R

R

R

R

10R

R = 158kΩ ± 47%

Driver A

Driver B

Logic &

Internal

Clock

+

V

-