HV746 Supertex, Inc., HV746 Datasheet

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HV746

Manufacturer Part Number
HV746
Description
Dual High Speed ?75v 2.5a Ultrasound Pulse
Manufacturer
Supertex, Inc.
Datasheet
Features
Applications
Typical Application Circuit
HVCMOS technology for high performance
High density integration ultrasound transmitter
0 to ±75V output voltage
±2.5A source and sink current in PW mode
±800mA source and sink current in CW mode
Up to 20MHz operation frequency
Matched delay times
1.2V to 5.0V CMOS logic interface
Over temperature sensing
Under voltage protections
Built-in output drain bleed resistors
Portable medical ultrasound imaging
Piezoelectric transducer drivers
NDT ultrasound equipment
Pulse waveform generator
+1.8 to 3.3V
Logic
Dual High Speed ±75V 2.5A Ultrasound Pulser
OT P
MC0
PIN1
NIN1
MC1
EN
C1
+1.8 to 3.3V
GREF
EN_P WR
VLL
Translator
Translator
Level
Level
VSS
+9V
C2
VDD
HV746
1 of 2 Channels
General Description
The Supertex HV746 is a dual-channel monolithic high voltage
high-speed pulse generator. It is designed for portable medical
ultrasound applications. This high voltage and high-speed
integrated circuit can also be used for other piezoelectric,
capacitive or MEMS sensor in ultrasonic nondestructive
detection and sonar ranger applications.
The HV746 consists of controller logic interface circuit, level
translators, MOSFET gate drives and high current power P-
channel and N-channel MOSFETs as the output stage for
each channel. A 2-bit mode control is provided that allows the
maximum output current to be reduced for power saving.
The output stages of each channel are designed to provide
peak output currents over ±3.6A for pulsing, when in mode
4, with up to ±75V swings. When in mode 1, all the output
stages drop the peak current to ±800mA for low-voltage CW
mode operation to save power consumption of the IC. The P
and N type of power FETs gate drivers are supplied by two
fl oating 9.0VDC power supplies reference to V
direct coupling topology of the gate drivers not only saves two
high voltage capacitors per channel, but also makes the PCB
layout easier.
C3
SU B
P-Driver
N-Driver
+75V
VSUB
VNF
VNN +9V
VPP -9V
VPF
C7
C4
VNN
0 to +75V
0 to -75V
RN1
C6
RP1
VPP
RGND
C5
TXP1
TXN1
RGND
D1
D2
HVOUT1
PP
X1
and V
HV746
NN
. This

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HV746 Summary of contents

Page 1

... PIN1 +1.8 to 3.3V Logic NIN1 General Description The Supertex HV746 is a dual-channel monolithic high voltage high-speed pulse generator designed for portable medical ultrasound applications. This high voltage and high-speed integrated circuit can also be used for other piezoelectric, capacitive or MEMS sensor in ultrasonic nondestructive detection and sonar ranger applications ...

Page 2

... L = Lot Number HV746K6 YY = Year Sealed LLLLLLLLL WW = Week Sealed YYWW A = Assembler Country of Origin AAA CCC = “Green” Packaging 48-Lead QFN (K6) 1 Logic control signals go to low 2 V and –V ) and ( SUB HV746 NN – ...

Page 3

... Max Units Conditions 5.0 V --- 6.0 V --- 1.0 V --- 6.0 V --- V = 3.3V, OTP = Active, 1 1.0mA PULL- 3.3V, OTP = Active 1.0mA PULL-UP If over temperature occurs, OTP 125 °C low and all TX outputs will be - °C HiZ. HV746 = 25°C) A ...

Page 4

... Min Typ Max - - 180 500 - 2 2 ±2 HV746 - V = -9.0V +75V -75V,T = 25° Units Conditions A --- Ω 100mA 25V 1.0MHz DS Units Conditions A --- Ω 100mA 25V 1.0MHz DS Units Conditions kΩ --- mW --- Units Conditions V --- V --- μ ...

Page 5

... Not allowed, may damage IC. 50 10 MC0 (A) 0 0.82 1 1.16 0 1.94 1 3.6 – +9.0V NN NIN 90 (Ω 7.5 4.0 Output TXP X OFF ON OFF ON* OFF HV746 (Ω 7.0 3.8 TXN X OFF OFF ON ON* OFF ...

Page 6

... Logic low reference, logic ground (0V). 48 VLL Logic Hi voltage reference input (+3.3V). Thermal Pad Substrate bottom is internally connected to the central thermal pad on the bottom of package. It (VSUB) must be connected to VSUB, the most positive potential of the IC externally +9.0V +9.0V +9.0V +9.0V HV746 ...

Page 7

... JEDEC Registration MO-220, Variation VKKD-2, Issue K, June 2006. Drawings are not to scale. (The package drawing(s) in this data sheet may not refl ect the most current specifi cations. For the latest package outline information go to http://www.supertex.com/packaging.html.) Doc.# DSFP-HV746 A100407 θ ...

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