TIDA-01592

Reference Design for 25W High Voltage Programmable Power Supply for Ultrasound Transmit

TIDA-01592

Design files

Overview

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 load
  • Non-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 counts
  • Capable of switching frequency synchronization with ultrasound master or system clock frequency which helps in better harmonics rejection
  • Modular design allowing same supply to be duplicated or removed depending on number of levels for the pulser
  • Current mode control provides superior bandwidth and transient response with cycle-by-cycle current limiting

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUDS2.PDF (2929 K)

Reference design overview and verified performance test data

TIDRVI7A.PDF (523 K)

Detailed schematic diagram for design layout and components

TIDRVI8A.PDF (70 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRVI9A.PDF (295 K)

Detailed overview of design layout for component placement

TIDRVJ1A.ZIP (2411 K)

Files used for 3D models or 2D drawings of IC components

TIDCEH3A.ZIP (392 K)

Design file that contains information on physical board layer of design PCB

TIDRVJ0A.PDF (2209 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Boost controllers (external switch)

LM34812.97V to 48V High-Efficiency Controller for Boost, SEPIC and Flyback

Data sheet document-pdfAcrobat PDF open-in-new HTML
General-purpose op amps

TLV171Single, 36-V, 3-MHz, low-power operational amplifier for cost-sensitive applications

Data sheet document-pdfAcrobat PDF open-in-new HTML
N-channel MOSFETs

CSD19532Q5B100-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 4.9 mOhm

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide 25-W, HV, Programmable Power Supply for Ultrasound Transmit Reference Design Feb. 23, 2018

Related design resources

Reference designs

REFERENCE DESIGN
TIDA-01352 400-W Continuous, Scalable, ±2.5- to ±150-V, Programmable Ultrasound Power Supply Reference Design

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