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PDF HV746K6-G Data sheet ( Hoja de datos )
| Número de pieza | HV746K6-G | |
| Descripción | Ultrasound Pulser | |
| Fabricantes | Supertex | |
| Logotipo |  |
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Supertex inc.
HV746
Dual, High Speed,
±75V, 2.5A Ultrasound Pulser
Features
► 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
Applications
► Portable medical ultrasound imaging
► Piezoelectric transducer drivers
► NDT ultrasound equipment
► Pulse waveform generator
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 floating 9.0VDC power supplies reference to VPP
and VNN. 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 to 3.3V +9.0V
C1 C2
VLL VDD
+1.8 to 3.3V
Logic
OTP
EN
MC0
MC1
PIN1
EN_PWR
Level
Translator
NIN1
Level
Translator
+75V VPP -9.0V
C3 C4
0 to +75V
C5
VSUB VPF
VPP
SUB
RGND
P-Driver
N-Driver
RP1
RN1
TXP1 D1
HVOUT1
TXN1 D2
X1
GREF
1 of 2 Channels
VSS HV746 VNF
VNN
C7 C6
VNN +9.0V
0 to -75V
RGND
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
1 page  
Switch AC Test Timing Diagram
NINx
PINx
90%
Output
10%
tr
tf
0
10%
VPP
VLL VDD
VNN 90%
VSUB
VPF
VPP
HV746
OTP
EN
MC0
MC1
PIN1
NIN1
EN_PWR
Level
Translator
SUB
P-Driver
Level
Translator
N-Driver
RGND
RP1
TXP1
TXN1
RN1 R2
R1
GREF
1of n Channels
VSS
VNF
RGND
VNN
PINx
50%
tdrp
IOUT
50%
TXPx
0A
NINx
tdfp
tdrn
50%
TXNx 0A
tdfn
50%
IOUT
Supertex inc. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
5
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet HV746K6-G.PDF ] | |
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