Reference Design for 25W High Voltage Programmable Power Supply for Ultrasound Transmit TIDA-01592 (ACTIVE)

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Description

This reference design provides a solution for digitally programmable non-isolated power supply for powering Ultrasound transmit circuit. It uses Fly-back Power Supply topology with the use of single transformer to generate Dual Programmable High Voltage upto 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 High Voltage (HV) rails are programmable from 0 V to ±100V through a set dc voltage. The programmability through DAC can be implemented using 12-bit DACs which can be referenced from TI design TIDA-01352. All the power supply rails are capable of synchronizing 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.
 

Features
  • Operates from 24V supply with wide range of frequency from 100kHz to 500kHz with digitally programmable dual output from 0V to +/- 100V 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 – flyback topology enables scalability for lower/higher channel counts
  • Capable of switching frequency synchronization with ultrasound master or system clock frequency – 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

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD19532Q5B  100V, N ch NexFET MOSFET™, single SON5x6, 4.9mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
LM3481  2.97V to 48V High-Efficiency Controller for Boost, SEPIC and Flyback  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules
TLV171  36V Low-Power RRO General-Purpose Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM3481 Download Download
TLV171 Download Download
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 2929 23 Feb 2018
Design files (6)
Title Type Size (KB) Date
PDF 523 16 Apr 2018
PDF 2209 16 Apr 2018
ZIP 392 16 Apr 2018
ZIP 2411 16 Apr 2018
PDF 70 16 Apr 2018
PDF 295 16 Apr 2018
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Reference Designs  ( 1 )


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