HV739

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 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 Nchannel power FETs gate drivers are supplied by two floating 10 to 12VDC power supplies referenced 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. Applications ► NDT ultrasound equipment ► Piezoelectric transducer drivers ► Sonar, ranger and flow metering Typical Application Circuit +1.8~5V C1 VLL VDD +12V C2 C3 VSUB +100V +88V C4 VPF VPP +100V C5 HV739 EN PIN EN_PWR ...