TIDA-01598

Low Side, High Bandwidth Current Amp and Fault Detection for Solar Inverters Reference Design

TIDA-01598

Design files

Overview

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)

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.

TIDUE85.PDF (1328 K)

Reference design overview and verified performance test data

TIDRWO4A.PDF (299 K)

Detailed schematic diagram for design layout and components

TIDRWO5.PDF (59 K)

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

TIDRWO6.PDF (159 K)

Detailed overview of design layout for component placement

TIDRWO8.ZIP (2167 K)

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

TIDCES1.ZIP (281 K)

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

TIDRWO7.PDF (958 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Comparators

LMV393-NDual General Purpose, Low Voltage, Tiny Pack Comparator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Current sense amplifiers analog output

INA240-4 to 80V, bidirectional, ultra-precise current sense amplifier with enhanced PWM rejection

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

LP2985150-mA, 16-V, low-dropout voltage regulator with enable

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TLV760100-mA, 30-V, low-dropout voltage regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS717150-mA, high-PSRR, low-IQ, low-dropout voltage regulator with enable

Data sheet document-pdfAcrobat PDF open-in-new HTML
Noninverting buffers & drivers

SN74LVC1G17Single 1.65-V to 5.5-V buffer with Schmitt-Trigger inputs

Data sheet document-pdfAcrobat PDF open-in-new HTML
Precision op amps (Vos<1mV)

OPA350Single, single-supply, rail-to-rail, high speed, low noise operational amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
Shunt voltage references

TLV431B0.5% accuracy, low-voltage, adjustable precision shunt regulator

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

Technical documentation

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* Design guide Reference Design for Low-Side, High-Bandwidth Current Amp and Error Detection Jul. 10, 2018

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