Ultrasound smart probe power supply reference design
TIDA-010057
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Key Document
Description
Significant technological advancements and high degree of integration in Medical imaging, especially hand-held ultrasound smart probes, are pushing engineers to come up with highly-efficient, noise immune power solutions in a small size. This reference design documents end to end power and data solution for our high performance 128-channel Tx/64-channel Rx ultrasound smart probe solution with TX7332 transmit chip and AFE5832LP receive chip. The power tree includes a single-stage transformer-less HV generation (up to +/- 80V & height <5mm) for transmit and the point-of-load LV for the AFEs & FPGA from a 5V USB Type-C™ input. This design enables low-noise (<10mV ripple) efficient rails and better thermal performance (< 10°C temp rise) achieving system efficiency ~80%, receive data SNR > 55dB and ultra-compact size (90mm x 45mm x 20mm). All power rails can be synchronized to an external clock using our integrated buffer-divider CDCE949. This design also supports 1S battery input with a normal ultrasound operation of up to 2 hours.
Features
- Transformer less dual rail HV (±80V @ 25 mA) generation from 5V USB in single stage implementation to meet component height requirement of < 5mm
- Low ripple and LV supply for the front end and FPGA from a 5V USB Type-C input
- Compact board size (< 90mm x 45 mm x 20mm)
- End to End System Efficiency ~80% running at full load
- SNR > 55dB (Noise Floor below -90dB)
- EN/DISABLE supplies for power optimization and all rails can be synchronized to external clock
- Accurate real time power consumption measurement using high performance instrumentation amplifiers INA231
- High speed data acquisition over USB Type C up to 4.2 Gbps
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Schematic/Block Diagram
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Design Guide
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TI Devices (15)
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| Sample & Buy |
Design Kits & Evaluation Modules |
| CDCE949 |
Programmable 4-PLL VCXO clock synthesizer with 2.5-V or 3.3-V LVCMOS outputs |
Clocks & timing |
Sample & Buy |
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| HD3SS3220 |
10-Gbps USB 3.1 Type-C 2:1 mux with DRP Controller |
USB ICs |
Sample & Buy |
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| INA231 |
28V, 16-bit, i2c output current/voltage/power monitor w/alert in wcsp |
Current sense amplifiers |
Sample & Buy |
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| LM3488 |
2.97V to 40V Wide Vin Low-Side N-Channel Controller for Switching Regulators |
Step-up (boost) regulators |
Sample & Buy |
Not Available |
| LMV112 |
40-MHz dual clock buffer |
Clocks & timing |
Sample & Buy |
Not Available |
| LMZM23601 |
36-V, 1-A Step-Down DC-DC Power Module in 3.8-mm × 3-mm Package |
Step-down (buck) regulators |
Sample & Buy |
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| LP5907 |
250-mA, low-noise, high-PSRR, ultra-low-dropout voltage regulator with low IQ and enable |
Power management |
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| LP5910 |
300-mA, low-noise, low-IQ, low-dropout voltage regulator with reverse current protection & enable |
Power management |
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| SN74LVC1G11 |
Single 3-input, 1.65-V to 5.5-V AND gate |
Gate |
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| TPD2EUSB30 |
Dual 0.7-pF, 5.5-V ±8-kV ESD protection diode with 5-A surge rating for USB 3.0 |
Circuit protection ICs |
Not Available |
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| TPD4E05U06 |
Quad 0.5-pF, 5.5-V, ±12-kV ESD protection diode for USB, HDMI & High Speed Interfaces |
Circuit protection ICs |
Sample & Buy |
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| TPS54218 |
2.95V to 6V Input, 2A Synchronous Step-Down SWIFT™ Converter |
Step-down (buck) regulators |
Sample & Buy |
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| TPS61178 |
20-V, 10-A fully integrated sync boost with load disconnect |
Step-up (boost) regulators |
Sample & Buy |
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| TPS74201 |
1.5-A, low-VIN (0.8-V), low-noise, high-PSRR, adjustable ultra-low-dropout voltage regulator |
Power management |
Sample & Buy |
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| TPS7A39 |
150-mA, 33-V, low-noise, high-PSRR, dual-channel positive & negative low-dropout voltage regulator |
Power management |
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Technical documentation
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User guide (1)
| Title | Type | Size (KB) | Date |
| | PDF | 12856 |
11 May 2020
|
Design files (6)
| | PDF | 1165 |
04 Jun 2020
|
| | ZIP | 6926 |
04 Jun 2020
|
| | ZIP | 3652 |
11 May 2020
|
| | PDF | 3590 |
11 May 2020
|
| | PDF | 285 |
11 May 2020
|
| | PDF | 157 |
11 May 2020
|
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