CIRCUIT060032
High-voltage, high-side floating current sensing circuit using current output, current sense amp
CIRCUIT060032
Overview
This cookbook is intended to demonstrate a method of designing an accurate current sensing solution for systems with high common mode voltages. The principle aspect of this design uses a unidirectional circuit to monitor a system with Vcm = 400V by floating the supplies of the device across a Zener diode from the supply bus (Vcm). This cookbook is based on the TIDA-00332 high voltage 12 V – 400 V DC current sense reference design.
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
Get started
- Read the circuit design
- Download the model
Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| Circuit design | High-voltage, high-side floating current sensing circuit using current output, c (Rev. A) | PDF | HTML | Sep 26, 2024 | |
| E-book | An Engineer's Guide to Current Sensing (Rev. B) | Apr 12, 2022 | ||
| Application note | Extending the Common-Mode Voltage Range of Current-Output Current Shunt Monitors (Rev. A) | PDF | HTML | Mar 21, 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 |