Questions tagged [current-sensing]
The current-sensing tag has no usage guidance.
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How to sample current in high-kHz to low-MHz [closed]
I am working on a project that, at its simplest, is a switching circuit (either a half-bridge or single switch) connected to a resonant filter. I need a way to measure/sample the current going from ...
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Current sensing in DC-DC converter
I studied DC-DC converter in peak/valley/average mode control and I have a question about the methodology to sense the current in average current mode control. I saw lot of paper about DCR sensing but ...
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Troubleshooting Voltage Sensing Issues in Buck-Boost Chip Simulations
I performed a simulation on a buck-boost chip (LT8390). I understand that the sensing resistor placed between LSP and LSN is supposed to sense the differential voltage. This voltage is then amplified ...
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Sensing Resistor in Buck-Boost controllers
In the LT8390, there are two sensing resistors. The one connected to LSN/LSP is called RSENSE(Buck), and the one connected to ISP/ISN is called RSENSE(BOOST). To illustrate this more clearly, I've ...
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Allegro current sensors on 220 VAC mains
A friend is designing a power meter for 220 VAC mains and is considering Allegro current sensors like the ACS37002 or ACS71240. Those sensors put a wire with a sub-ohm resistance in line with the ...
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Unipolar stepper driven PWM to reduce voltage
I need to drop voltage for unipolar stepper motor with winding resistance 50ohm and inductance 40mH (measured with generator and oscilloscope for equivalent circuit Rout + (Rl + L)). Available Vcc is ...
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High-side driver current monitoring via microcontroller
I'm building an automotive power distribution module which makes use of the Infineon BTS50010 high-side driver.
The high-side driver current is monitored via the sense pin (IS) connected to a ...
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Current-sense resistor switching mechanism
I planned to make a DIY power meter with automatic switch for current range, usually towards low (uA maybe) currents.
I came up with the design below to switch between various current-sense resistors. ...
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Choosing an adequate op-amp for shunt resistor sensing in SMPS applications
I would like to get some industry experts / design engineers opinion about potential methods to improve the proposed shunt resistor current sensing method below. The intention is to improve this ...
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Understanding current sense circuit
I'm trying to adapt a current limiter design that I found, and I'm having trouble understanding the "current sense" part of it.
The current sensing is implemented using a shunt resistor, ...
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292
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High-side current sensing using PNP
I have the following three states:
State 1: When system is active with transducers, current through the load is approximately 350 mA.
State 2: When system is activated without transducers, current ...
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How to sense a varying current and voltage without affecting the load
I've been asked to build a circuit to switch a constant power (varying current & voltage) supply between two loads, for a research experiment the customer is carrying out. The loads are unknown ...
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Designing a current sensing op-amp circuit for an AC load
I'm trying to simulate a current sensing op-amp circuit. My AC voltage, 24 VAC, is across a load of 10 Ω. I used a 100 μΩ resistor and measured the voltage across it using an op-amp.
Looking at some ...
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Flyback converter sense resistor placement and wiring
I am designing my first ever Flyback converter. The Fsw = 100kHz. Peak primary current = 3.26A.
The converter has to fit in a very small space, so I'm making a lot of compromises. For example, I could ...
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Issue with influence between channels in a dual-channel high-side current sensing circuit
I've designed a two-channel current sensing circuit integrated into a board that outputs two separate signals. However, I'm encountering an issue where one channel seems to influence the other, which, ...
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