HV748K6-G Microchip

HV748 4-Channel High-Speed Bipolar 75V 1.25A Ultrasound Pulser Features General Description High-Density Integrated Ultrasound Transmitter The HV748 is a 4-channel high-voltage high-speed pulse generator. It is designed for portable medical 0V to 75V Output Voltage ultrasound applications. This high-voltage an d 1.25A Source and Sink Current in Pulse Mode high-speed integrated circuit can also be used for 300 mA Current in CW Mode piezoelectric, capacitive or MEMS sensing in ultrasonic Up to 20 MHz Operating Frequency non-destructive detection and sonar ranger Matched Delay Times applications. 2.5V to 3.3V CMOS Logic Interface The HV748 consists of a controller logic interface Built-in Output Drain Bleed Resistors circuit, level translators, MOSFET gate drivers and high-power P-channel and N-channel MOSFETs as the output stages for each channel. Applications The output stages of each channel are designed to Portable Medical Ultrasound Imaging provide peak output currents of over 1.8A for pulsing, Piezoelectric Transducer Drivers when in Mode 4, with up to 75 volt swings. When in Non-Destructive Testing Mode 1, all the output stages drop the peak current to Pulse Waveform Generator 400 mA for low-voltage CW mode operation to decrease the power consumption of the IC. The drivers are supplied by two floating power supplies referenced to V and V . This direct coupling topology of the PP NN gate drivers not only eliminates two high-voltage capacitors per channel but also makes the PCB layout easier. Package Type 48-lead (7 X 7) VQFN (Top view) 48 1 See Table 2-1 for pin information. 2018 Microchip Technology Inc. DS20005898A-page 1HV748 Functional Block Diagram V -9.0V +1.8 to 3.3V +9.0V +75V 0 to +75V PP C1 C2 C4 C5 C3 VLL VPF VDD VSUB VPP OTP SUB RGND EN EN PWR MC0 Level RP1 MC1 +1.8 to 3.3V P-Driver Translator Logic PIN1 TXP1 D1 HV 1 OUT TXN1 D2 Level NIN1 N-Driver RN1 Translator X1 RGND 1 of 4 Channels GREF VSS VNF C7 VNN C6 HV748 V +9.0V 0 to -75V NN DS20005898A-page 2 2018 Microchip Technology Inc.