Supertex inc.

Supertex inc.

www.supertex.com

HV7331

Doc.# DSFP-HV7331

B011513

Features

Applications

General Description

The Supertex HV7331 is a four-channel, monolithic, high voltage,

high speed pulse generator with built in fast return to zero damping

FETs. This high voltage and high-speed integrated circuit is

designed for portable medical ultrasound imaging devices, and can

also be used for NDT applications.

The HV7331 consists of a controller logic interface circuit, level

translators, MOSFETgate drives, and high current power P-channel

and N-channel MOSFETs as the output stage for each channel.

The peak output currents of each channel are guaranteed to be

over 2.0A with up to a ±70V pulse swing. The integrated regulators

for the gate drivers not only saves two floating voltage supplies, but

also makes the PCB layout easier. The split common source for

the P or N damping MOSFETs provide pulse or CW Doppler mode

quick switch-over for cost and power savings.

Typical Application Circuit

Four Channel, High Speed ±70V 2.0A

Ultrasound RTZ Pulser

CGN

TX1

RGP

HV

OUT

RGN

+VCW

CW/RTZ

-VCW

CGP

Logic

& Level

Translator

V

PP

V

PF

V

NF

V

NN

V

NN

SUB

VSUB

DGND

VNN

-5.0 to -70V

1 of 4-Channels Shown

VSS

-5.0V

CNF

VDD

+5.0V

VPP

+5.0 to +70V

CPF

VLL

+2.5 to 3.3V

V

PP

EN

LR

CW/RTZ

PIN1

NIN1

AGND

V

PF

VNF

V

GN

R

GN

R

GP

V

GP

VGP

VGN

V

SS

LRN

V

DD

RGND

RGND

LRP

RGND