Questions tagged [over-current]
The over-current tag has no usage guidance.
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Flip-flop logic for comparator of overcurrent detection
I'm working on the realization of overcurrent detection that will be powered by a battery supply. I successfully simulated a comparator with an operational amplifier that will set the output high when ...
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Comparator as a current detector with shunt resistor v2
I have a comparator with a shunt resistor that measures the voltage and when the voltage of 12 V from the source exceeds the Vref (1 V in my case) it switches to "high" output. I would like ...
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Comparator as a current detector with shunt resistor
I would like to design in OrCAD a comparator with a shunt resistor that will measure the voltage and when the voltage value is exceeded it will flip. I have designed the comparator but I don't know ...
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Rating of circuit breaker for protection
This circuit breaker is rated as 12V-48V 100A and I have to use this circuit breaker between additional alternator (24V 100A) in my vehicle and additional battery bank to provide overcurrent/short ...
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Latching comparator always starts at latching position
I build a over-current protection circuit using a latching comparator, below circuit diagram is the simplified version (without the current limit circuitry):
simulate this circuit – Schematic ...
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Over-current/short-circuit protection for the battery bank
I am using a 24 V 100 A additional vehicle alternator for charging my additional battery bank of 24 V. I need an over-current/short-circuit protection for my battery bank. I am considering using a DC ...
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Implement adjustable overcurrent protection for DC current
I am designing a hobbyist's multi-fixed voltage channels using ATX PSU breakout.
Of course the fixed voltages are 3.3V, 5V, 12V, and if possible, -12V too which are supported by ATX.
Now I want to ...
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Configuring Overcurrent Protection – ST Microelectronics Motor Control Workbench
I have been working on a custom electronic speed controller I designed and built partly based on a reference design from ST Microelectonics; the STEVAL-ESC001V1.
My board uses the same MCU, a ...
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Connect LED to current limiter TPS259540 and control the current
I have an LED (ILH-ON01) with a forward current (IF) rating of 1 A. I want to operate this LED at a constant current of 1 A using a current limiter. The current limiter I have has a limit of 1.17 A ...
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How and where to learn protective relaying for power systems?
I'm trying to learn protective relaying for power systems. More specifically, I want to learn how to calculate the settings that must be configured in the digital relays in order to build ANSI device ...
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Do power strips need to have a breaker?
In North America we commonly use power strips to connect equipment to the building.
https://en.wikipedia.org/wiki/Power_strip
I noticed that some power strips have a circuit breaker, and some do not.
...
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Super capacitor causing overcurrent protection
I'm making a power-supply circuit for some MCUs using a battery charging-discharging protect module MH-CD42 (both input and output is 5 V).
The module's datasheet says it has a 0.3 seconds switch time ...
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138
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Circuit Protection: on-board vs off-board; manual vs auto. Which is better for our application?
RE: Circuit protection for small health & beauty product (for mass-production) similar to a foot spa whereby a portion of the user's body will come into direct contact with 1.5 gallons of water ...
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Understanding USB3.0 over-current detection circuit
I'm trying to understand how the following over-current protection circuit works:
the way I understand this, as long as +VBUS_USB3_P0 = 5V and it's equal to +5V_ALW, there is no current current going ...
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How can I protect a 12 V, 5 A circuit from high current due to short circuit condition?
How can I protect a 12 V, 5 A circuit against high current due to short circuit?
I have tried resettable fuses but they do not work as expected. I have tried MF-USML300/12-2. In actual application (...
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Overcurrent protection (at 4A 100V)
On the PCB I'm designing, the total power consumption might be as high as 86W (including output power), with supply voltage between 18 and 75V DC (it is OK not to allow full output power bellow 22V). ...
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Non-triangular/Incorrect (non linear) inductor current waveform for half bridge buck converter
I have a buck converter (Half bridge) as shown in the schematic below. (48V output). V_D goes to an external inductor.
I have measured the inductor current for different loads (Nominal(upto 4A), ...
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USB 3.0 Type-A Overcurrent Protection Circuit
I'm trying to understand a basic concept that was used in a some reference design in order to provide over-current solution to USB3.0 port:
I can't understand why +VBUS_USB3_P0 was place between +...
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Automotive generator overcurrent protection
I am rebuilding the wiring harness for the engine of a 50+ years old car. There are a few things in the original design that I am planning to improve while at it. My main concern is part of the ...
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Power supply circuits to supply specific voltage with current limitations
I have an old sensor that requires 200mA at 5v DC, but it does not have any overcurrent protections and will blow a capacitor if the current is too high. Is there some kind of current limiter circuit ...
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TC4056A shuts off at maximum volume (Bluetooth speaker)
I am trying to build a DIY Bluetooth speaker using a 18650 battery cell, a TC4056A battery charger board, an XY-016 that raises the voltage to 6.5 V, a 2200 μF capacitor, and a CSR8645 board. I am ...
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Over Current/Short Circuit Protection Using op-amp and MOSFET
I wanted a circuit to limit the current to say 4A, and found this but it doesn't work in the Proteus simulator. What's wrong with this circuit? anyways to improve it?
here is my expectation of the ...
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Half-bridge driver IR2101 shorting high side and low side (In a weird condition)
I am making my own FOC BLDC driver, but there is a weird problem when I control the gate driver using PWM.
I am using three IR2101 driver IC to drive the six N-FETs, and I am using an STM32 (Blue pill)...
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Linear power supply - overload protection circuit
Summary and context:
Several years ago I bought a linear power supply from Pyramid, model PS-3KX.
I would like to understand in detail how the overload protection really works, as said by Pyramid ...
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protect from in rush current of buck convertor
I made a PCB base on the following schematic,
it uses a buck convertor for 12 to 5 v and then uses an LDO for 5 to 3.3 to run my ESP module
I use 2 P-channel MOSFET for polarity protection , but ...
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136
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DC over current protection idea needed for step down converter input
I ride an electric motorcycle which is powered by a 26s 96V Li-ion battery. It has regen braking that charge the battery with 50A current. All the lights are powered by a 60v-120v to 12V 15A DC step ...
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18650 Li-ion cell protection tripping at super low currents (~1 mA)
I recently bought a 3.7 V lithium-ion cell to replace an old 3.6 V NiCd one in a handheld vacuum cleaner. I am aware that Li-ion cells don't handle current surges nearly as well as NiCds do, and for ...
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What will happen if I use RCBO where there is no neutral in the system?
I need some help. Could you please go through the scenario and try to answer my query below?
This system is installed in a ship where there is no neutral connection available.
A 440V/220V step-down ...
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Transformer secondary conductor protection: how do NEC 240.21(C) and NEC 240.4(B) make sense together?
NEC 240.21 says all ungrounded circuit conductors require overcurrent protection, with a list of exceptions:
One of those exceptions is 240.21(C):
240.4(B) says that if you're under 800 amps, you ...
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USB hub IC overcurrent Pin: active LOW or active HIGH?
I am using USB2517 - USB 2.0 Hi-Speed 7-Port Hub Controller IC to make a USB 2.0 hub.
What I do not understand (or its missing from the IC's datasheet), is Pins OCS[7:1]_N, which are "Input from ...
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