Reference Design for 25W High Voltage Programmable Power Supply for Ultrasound Transmit
Description
This reference design is a digitally programmable non-isolated power supply for powering ultrasound transmit circuit. It uses flyback power supply topology with the a single transformer to generate dual programmable high voltage (HV) up to the absolute value of 100 V. This design is targeted for low-power portable ultrasound scanners. The design can deliver a maximum continuous power of 25 W with 12.5 W each on individual rails. The HV rails are programmable from 0 V to ±100 V through a set DC voltages. The programmability through DAC can be implemented using 12-bit DACs which can be referenced from reference design TIDA-01352. All the power supply rails are capable of synchronizing to a master clock. This design is scalable and modular allowing the same supply to be duplicated or removed: depending on number of channels and number of pulser levels.
Features
- Operates from 24-V supply with wide range of frequency from 100 kHz to 500 kHz with digitally programmable dual output from 0 V to +/- 100 with peak efficiency of 87% at full loadNon-isolated common power supply for bias and pulser driver (to support B-mode: CW-mode and elastography mode)Capable of powering up to 192 digital pulser channels through flyback topology that enables scalability for lower/higher channel countsCapable of switching frequency synchronization with ultrasound master or system clock frequency which helps in better harmonics rejectionModular design allowing same supply to be duplicated or removed depending on number of levels for the pulserCurrent mode control provides superior bandwidth and transient response with cycle-by-cycle current limiting
Applications
- Fitness machine
- Mother & neonatal care monitor
- Ultrasound smart probe
- Ultrasound scanner
Product Categories
- Power management