HV739 Datasheet, PDF (1/7 Pages) Supertex, Inc – High Speed ±100V 3.0A Ultrasound Pulser

HV739
High Speed ±100V 3.0A Ultrasound Pulser
Features
► HVCMOS technology for high performance
► High density integration ultrasound transmitter
► Bipolar ±100V or unipolar 0 to 200V output voltage
► ±3A source and sink peak current
► Up to 10MHz operation frequency
► Matched delay times
► 1.8V to 5.0V CMOS logic interface
► Over temperature sensing
► Under voltage protections
Applications
► NDT ultrasound equipment
► Piezoelectric transducer drivers
► Sonar, ranger and flow metering
General Description
The Supertex HV739 is a single channel monolithic 200V
3.0A high-speed pulser. It is designed for NDT and medical
ultrasound applications. This high voltage and high-current
integrated circuit can also be used for other piezoelectric,
capacitive or MEMS sensor in ultrasonic transducer and sonar
ranger applications.
HV739 consists of controller logic interface circuit, voltage
level translators, MOSFET gate drives and high current power
P-channel and N-channel power MOSFETs as the output
stage.
The output stage of HV739 is designed to provide output
peak currents over 3.3A with up to 200V swing. The P- and N-
channel power FETs gate drivers are supplied by two floating
10 to 12VDC power supplies referenced to V_PP and V_NN. This
direct coupling topology of the gate drivers not only saves two
high voltage capacitors per channel, but also makes the PCB
layout easier.
Typical Application Circuit
+1.8~5V +12V
C1
C2
V_LL V_DD
+100V +88V
+100V
C3
C4
C5
V_SUB V_PF
V_PP
HV739
SUB
EN
EN_PWR
V_PP
+1.8 to 5.0V
PIN
Logic Input
Level
Translator
P-Driver
TXP
D1
HV_OUT1
NIN
Level
Translator
N-Driver
TXN ^D2
OTP
Over Temp.
V_NN
X1
R1
GREF
V_SS
V_NF
C7
-88V
V_NN
C6
-100V