Low-Voltage, Low-Noise Power-Supply Reference Design for Ultrasound Front End

(ACTIVE) TIDA-01466

Description & Features

Technical Documents

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Key Document

Description

This reference design is a power supply optimized specifically for providing power to eight 16-channel receive AFE ICs for ultrasound imaging systems. This design reduces part count while maximizing efficiency by using single-chip DC-DC converter + LDO combo regulators to set the LDO input just above the dropout voltage while taking full advantage of the LDO PSRR.  In addition, ultra-low-noise LDOs help to attain the highest resolution possible from A/D conversion, leading to higher image quality. This design is capable of switching frequency synchronization with the master and system clock frequency to aid system designers apply simple filtering techniques to remove power supply switching noise on ground loops or use spreadspectrum clocking to reduce EMI. Additionally, the design implements an eFuse device, providing a simple and flexible means of overcurrent protection.

Features
  • Suitable for 12V input ultrasound system front end
  • eFuse operating with input current limit of 4.2A
  • Capable of powering eight AFEs for up to 128 channels (scalable channel count), supports power output of 36W
  • Combo DC/DC converter + LDO ICs maximizes LDO efficiency by setting LDO input just above dropout voltage
  • Uses high PSRR and ultra-low-noise (4.4 μVRMS) LDOs to attain highest resolution possible from A/D conversion
  • Common synchronized power supply for all AFEs on same T/R board reduces board space while aiding noise reduction and EMI elimination

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  




TI Devices (8)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CDCLVC1106  Low Jitter, 1:6 LVCMOS Fan-out Clock Buffer  Clock Buffers  Sample & Buy View Design Kits & Evaluation Modules
LM3881  Simple Power Sequencer with Programmable Time Delay  Power Management  Sample & Buy View Design Kits & Evaluation Modules
TLV704  24-V Input Voltage, 150-mA, Ultralow IQ Low-Dropout Regulators  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules
TPS25926  12V, 5A, 30mΩ eFuse with Adjustable +/-15% Accurate Current Limit  Protection, Monitoring and Hot Swap  Sample & Buy View Design Kits & Evaluation Modules
TPS54122-Q1  Automotive-grade 3A QuietSupply™ Regulator with Integrated DC-DC Converter and Low-Noise LDO  Step-Down (Buck)  Sample & Buy View Design Kits & Evaluation Modules
TPS54824  4.5V to 17V Input, Current Mode, 8A Synchronous SWIFT™ Step-Down Converter  Step-Down (Buck)  Sample & Buy View Design Kits & Evaluation Modules
TPS7A8300  2A, Low-Dropout Voltage Regulator for High-Speed Communication Systems  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules
TPS7A84  High-Current (3A), High-Accuracy (1%), Low-Noise (4.4μVRMS), LDO Regulator  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1293 20 Sep 2017 96
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 1848 20 Sep 2017 14
ZIP 1173 20 Sep 2017 24
PDF 1795 20 Sep 2017 16
PDF 371 20 Sep 2017 22
PDF 172 20 Sep 2017 24
PDF 1003 20 Sep 2017 57


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