CIRCUIT060030

High-side, bidirectional current-sensing circuit with transient protection

CIRCUIT060030

Overview

This high-side, bidirectional current sensing solution can accurately measure current in the range of –40 A to 40 A for a 36-V voltage bus. The linear voltage output is 100 mV to 4.90 V. This solution is also designed to survive IEC61000-4-4 level 4 EFT stress (Voc = 2 kV; Isc = 40 A; 8/20 µs).
Features
  • Input: -40 A to 40 A
  • Output: 100 mV to 4.9 V
  • Supply: Vs = 5 V, GND = 0 V, Vref = 2.5 V
  • Standoff and clamp voltages: Vwm = 36 V, Vc = 80 V
  • EFT Level: Vpp = 2 kV 8/20 µs
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Technical documentation

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Type Title Date
E-book An Engineer's Guide to Current Sensing (Rev. B) Apr 12, 2022
Application brief Using An Op Amp for High-Side Current Sensing (Rev. A) PDF | HTML Dec 7, 2021
Selection guide Current Sense Amplifiers (Rev. E) Sep 20, 2021
Application note Evaluating Current Sensing Amplifiers in Body Control Modules Using Simulation Dec 16, 2019
Circuit design High-Side, Bidirectional Current-Sensing Circuit with Transient Protection (Rev. A) PDF | HTML Feb 1, 2019

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