400-W Continuous, Scalable, ±2.5- to ±150-V, Programmable Ultrasound Power Supply Reference Design

1 января 2018

The TIDA-01352 enables modular and efficient power scaling capability by providing a solution for digitally programmable power supply for powering ultrasound transmit circuit. The design uses push-pull topology to generate high-voltage (HV) and low- (LV) or MID- voltage power supplies. The HV rails are programmable from ±50V to ±150V, whereas the LV or MID rails are programmable from ±2.5V to ±50V. The power supply is capable of providing a continous power of 100-W on each rail. The programmability is implemented using onboard, 12-bit digital-to-analog converters (DACs). All the power supply rails are capable of being synchronized to a master clock. The design is scalable and modular allowing same supply to be duplicated or removed depending on number of channels and number of levels of pulser. The referencedesign also consists of other LV power supplies necessary for the pulser operation. This reference design is ideal for the high-voltgae DC-DC boost stage to use in conjuction with the floating (post) regulator design TIDA-01371.

Особенности

High-efficiency (89% at full load with 24-V input) push-pull topology enables scalability for lower or higher power (channel counts) Independent positive and negative voltage power supplies helps achieving bipolar functionality for up to 192 digital pulser and linear amplifier transmit channels Modular design allows same supply to be duplicated or removed depending on number of levels for pulser Capable of switching frequency synchronization with ultrasound master or system clock frequency — helps in better harmonics rejection Onboard, 12-bit, quad DAC enables digital programmability for output from ±2.5V to ±150 V (each rail can support 100-W continuous power and 350-W peak power) Common power supply for pulser driver (to support B-Mode, CW-Mode, and elastography mode), internal level-shifters, and logic enables consolidation to single board design