Questions tagged [over-current]
The over-current tag has no summary.
48 questions
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LM393 comparator not pulling down
A voltage divider is fixing the non-inverting input at 1.65V. Even at 2.5V at the inverting input of the open-collector LM393 comparator, it's not pulling down to 0V (actually pulling the voltage to ...
- 303
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Short circuit protection circuit using Flipflop
This question is the continuation of the question link I added here: Short circuit protection circuit using Latch.
I need to create controller with digital outputs (with short-circuit protection) and ...
- 91
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2
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Short circuit protection circuit using Latch
I need to create controller with digital outputs (with short-circuit protection) and inputs. For that first I am trying to figure out the digital output circuit with protection. BTS3800 was used for ...
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1
answer
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Best approach to design overcurrent monitor circuit
I have some power coming into my design, let's say 50V. I need to design a simple current monitoring (overcurrent) to detect if there is any overcurrent condition then disconnect the 50V to my load ...
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1
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How can one protect a potentiometer from over current? [closed]
I was wondering if there is a simple circuit that can protect a 1kohm/0.05W potentiometer from over current if for example the voltage can reach 20V maximum, other than using a current limiting ...
- 408
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Time current curve
What would be a typical time-current curve for a fuse or circuit breaker protecting a 400 kVA transformer on the LV side (ca 577 A rated current), where all the houses or loads are connected? Is there ...
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2
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Battery Unbalancing Situation
I have a question about the battery pack design. The datasheet of the battery is attached to this question.
The battery pack consists of 3 different module and each module contains 8 series and 2 ...
- 129
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1
answer
112
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Switched mode PS2 power supply failure [closed]
I have this power supply coming from a japanese PS2:
Since I’m stupid, I plugged it into 220V, but this thing is designed for 100V only… the 4A/125V fuse popped out after a couple of seconds.
Since I’...
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1
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Circuit breaker selection and panel design for LED lighting fixtures
This drawing was made for LED lighting fixtures. The fixtures will operate at 230V and have a power factor of >0.95. The current in each branch should be around 2-3 amperes. I don't understand how ...
- 11
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5
answers
648
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If diodes fail open with an overcurrent condition, why do they sometimes fail shorted from reverse polarity in a power supply?
I've been doing some research on how diodes fail, and to my understanding, diodes (specifically traditional and Schottky) fail open when their rated current is exceeded for an extended period of time, ...
- 547
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Load is switching between 0V and overcurrent in the pulsed drain biasing circuit for a Power Amplifier
Given below is a block diagram of an evaluation-board.
It is a pulsed biasing board to a PA. It is designed to produce a pulsed-drain and pulsed-gate signal for the biasing of GaN Power Amplifiers.
I ...
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1
answer
355
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Modelling a Desaturation detection circuit on LtSPICE
I am trying to model a gate driver desaturation detection mechanism with discrete elements on LTSpice. The waveforms I have obtained now provide a constant Vdesat of about 5.6V when MOSFET is turned ...
- 11
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0
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161
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Recoverable overcurrent protection of MOSFET using eFuse
I am looking into a way to improve over-current protection of an industrial device with switching contact output (based on PMV37ENEA MOSFET) that is rated for 1A / 30VDC load.
The PMV37ENEA is ...
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votes
2
answers
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Overcurrent LED in LM338 circuit
I have an LM338 set up in current regulation mode, and I want to make an LED turn on when the current is maxed out (4A in this case)
Where do I put this LED, and what other circuitry do I need? Is it ...
- 402
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Appropriate Overcurrent, Overvoltage, and Reverse Polarity Protection Circuit for Raspberry Pi 4?
I'm new to electronics but I'm trying to power a Raspberry Pi 4 (model b) using an external power supply for testing purposes[5V @ 3A]. This is possible via the GPIO, using pin 2 and pin 6 as ground ...
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