Low Side, High Bandwidth Current Amp and Fault Detection for Solar Inverters Reference Design TIDA-01598 (ACTIVE)

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Key Document

Description

This reference design provides a solution for an accurate shunt-based current measurement on the low side with an integrated fault-detection feature. It consists of a current sense amplifier which supports current sensing for a high bandwidth. The fault detection feature allows detection of undercurrent and overcurrent faults. The design provides a performance comparison between shunt-based current sensing and current sensing using a hall sensor.

Features
  • Shunt based low side current sensing system with negative common mode support
  • Compact system for current sensing
  • High bandwidth current sensing of up to 400kHz
  • Bidirectional current sensing support
  • Integrated undercurrent and overcurrent detection with less than 1µs response time
  • Less than 0.3% error in measurement for complete DC current range (-3A to 15A)

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (8)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA240  80V, Low-/High-Side, Bi-Directional, Zero-Drift, Current Sense Amp w/Enhanced PWM Rejection  Current sense amplifiers  Sample & Buy View Design Kits & Evaluation Modules
LMV393-N  Dual General Purpose, Low Voltage, Tiny Pack Comparator  Amplifiers  Sample & Buy Not Available
LP2985  150mA Low-Noise Low-Dropout Regulator With Shutdown  Power management  Sample & Buy View Design Kits & Evaluation Modules
OPA350  High-Speed, Single-Supply, Rail-to-Rail Operational Amplifiers MicroAmplifier™ Series  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC1G17  Single Schmitt-Trigger Buffer  Buffer/driver  Sample & Buy View Design Kits & Evaluation Modules
TLV431B  0.5% Accuracy Low-Voltage Adjustable Precision Shunt Regulator  Voltage references  Sample & Buy Not Available
TLV760  100-mA, 30-V wide-VIN, fixed-output linear voltage regulator  Power management  Sample & Buy Not Available
TPS717  150mA, High PSRR, Low Quiescent Current, Low Noise LDO  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
INA240 Download
Download
LMV393-N Download Download
Download Download
LP2985 Download Download
OPA350 Download Download
Download Download
Download Download
SN74LVC1G17 Download -
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Download Download
Download
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TLV431B Download Download
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Download -
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TLV760 Download Download
TPS717 Download Download
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1328 10 Jul 2018
Design files (6)
Title Type Size (KB) Date
PDF 299 26 Jul 2018
ZIP 281 10 Jul 2018
ZIP 2167 10 Jul 2018
PDF 958 10 Jul 2018
PDF 159 10 Jul 2018
PDF 59 10 Jul 2018

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