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Questions tagged [leakage-current]

Leakage current is the current that flows from either AC or DC circuit in equipment to the chassis, or to the ground, and can be either from the input or the output. If the equipment is not properly grounded, the current flow through other paths such as the human body. This may also happen if the ground is inefficient or is interrupted intentionally or unintentionally. (www.sunpower-uk.com)

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How much mains leakage does an Ethernet connection to a PC induce, and what is the operating leakage path?

It seems that some users on another Stack have reported GFCI nuisance trips caused by mains leakage through twisted-pair Ethernet cables connected between computers on different branch circuits, or ...
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1answer
54 views

Reverse Current leak Battery+Diode in parallel

on my design, I am using two coin batteries in parallel and each battery has a Schottky diode in series to block the reverse current, in theory, it will avoid the higher potential battery "charge" the ...
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0answers
26 views

Current leak LCD PCB IT-net vs TN-net

I have a LED with LED PCB mounted on a metalic plate that is connected to earth ground. The driver is a cl.2 driver with no earth wire and it's a constand current driver. The lamp is connected to ...
10
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2answers
538 views

How are such low op-amp input currents possible?

I understand that op-amps have low input currents; that's one of their defining characteristics. But looking at the datasheet for the LMC6001 (amusingly called an "Ultra, Ultra-Low Input Current ...
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1answer
100 views

Earthing system on a mobile vehicle?

We have an electrical system which needs a low impedance earthing system below two ohms. We have provided a proper earthing system in our factory and it works well. Now my question is if the system is ...
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0answers
14 views

leakage power with respect to Switching activity

Can anyone explain me relation of leakage current or power with respect to Switching activity(S.A). I'm assuming that with increase of S.A, the power dissipation of circuit increases in-turn ...
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0answers
25 views

Temperature-dependent leakage current in IGBTs

On one hand, the leakage current of power electronics modules such as IGBTs depends on the temperature. On the other hand, the temperature distribution on the IGBT chips is significantly non-uniform ...
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1answer
91 views

Analog switch on an instrumentation amplifier input

I'm working on a project for school that involves a configurable input stage (AC/DC coupling and variable input impedance) connected to an instrumentation amplifier. I am wondering whether I will ...
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2answers
183 views

Ultra low leakage capacitor for nano amp current source

I am looking for capacitor type which has very low leakage such as 0.5nA since I am working with a sensor which generates between 0.9nA to 0.55uA. Based on my research Film or foil Capacitor has the ...
4
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1answer
198 views

Protecting a coin cell from high current spikes - using a capacitor or not?

I've built some prototypes and try to gather some data from them. Skip below the two horizontal lines to read more about it. Original Question Brief summary I would like to know whether it is ...
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2answers
169 views

Protecting against over voltage but with minimum leakage current

I have a circuit where I sense an input which is a voltage divider with resistor. Since the voltage divider needs to have high impedance, the current flowing through is in the range of 10's of uA. I ...
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4answers
373 views

How to measure leakage current?

I have an AC powered device, and a customer asks for exact leakage current. Current that can trigger a leakage current circuit breaker, so it's obviously something flowing through Y capacitors to the ...
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1answer
47 views

Electric Tester light up on secondary side of Ground

I have assembled a PCB, which takes mains input 240VAC line and Neutral (my system enclosed in plastic case , so no ground/earth is provided) , and it use on board SMPS module(https://www.meanwell.com/...
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2answers
313 views

How to wire latching SPDT relay using proximity switches without relay hanging

I have a hydraulic-driven piston pump that I designed and built. I need a way for the pump to automaticlly go up and down. I wired it using a SPDT relay and a 3 wire PNP NC (normally closed) and ...
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1answer
433 views

MOSFET switch is leaking current when off

I have an N-Channel MOSFET that I'm using as a switch, and after wiring 20 identical circuits, I'm finding that 3 of them seem to leaking current when switched to off. The MOSFET I'm using is from ...
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2answers
83 views

how can I get leakage current in tlp?

I got tlp test data and found that the current at vertical line means leakage current. But I don't understand the method how does the tlp-test measure the leakage current. I tried to search the ...
0
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1answer
401 views

Earth leakage tripping with 3 phase motor [closed]

I'm working in elevator world, i'm now in a strange situation. The 3 Phase synchronous motor is connected by drive then main controller and a distribution board. The faulty earth leakage circuit ...
0
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1answer
55 views

Floating Nwell schematic and introduction in a MOS switch

My classmate told me using a mos (body connect drain)as a switch may have leakage current,because there is a parasitic diode in that MOS,so there will have a leakage current.so i have to connect the ...
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3answers
2k views

difference between reverse saturation and leakage current

I searched a lot but I didn't find any answer For a PN junction diode is the leakage current when the diode is reverse biased Equal to the reverse saturation current?? If they are not equal so ...
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3answers
169 views

Maximum resistor values for transistor inverter (NOT gate)

I have my circuit configured this way because I'll be hooking up my 8051 microcontroller GPIO pin to the point where three resistors (R2, R3, and R4) intersect, and the microcontroller only outputs my ...
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0answers
194 views

Earth leakage from isolated power supply

I have recently put together a DIY bench power supply using a DPS5015 from Rui Deng and an old laptop power supply. Everything seems to be working fine except for a small amount of current leaking to ...
0
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1answer
339 views

Does leakage reactance of transformer depend on quantum of load?

In a single phase transformer, considering copper losses and core losses, I want to find whether the leakage reactance is affected by change in load on the secondary? I was unable to find an answer ...
0
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1answer
209 views

Li-Ion charger IC leakage current confusion

I'm currently building a Li-Ion battery charging circuit which has a 5V/2A input. It should implement load-sharing in order to keep the output alive during charging. For charging, I found the ...
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2answers
322 views

At what load is the leakage current quantified for a power supply?

In this document it says "According to IEC 60601-1, the leakage current limits are provided in Table 1." If the leakage current is due to Y capacitor, the load R and the the parasitic capacitance of ...
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1answer
698 views

I/O input leakage current definition

I'm collected some input leakage information for I/O libraries. Most vendors and datasheets give a maximum value +/-1uA for the input leakage information (see below an example): This value is higher ...
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1answer
125 views

Locality of ghost/phantom voltages?

I know about the ghost voltage concept. As far I as understood for example in an SMPS there is "Y" EMI filter and that little capacitance creates a RC voltage divider and we see the ghost voltage high ...
1
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1answer
357 views

Input leakage on digital input

I'm trying to understand precisely input leakage when a GPIO is configured as an input. So I read some MCU datasheets, here is kinetis MK20 datasheets on p15/16 are given input leakage currents. I'...
3
votes
1answer
407 views

Voltage drop across each diode and current drawn from battery

I'm wondering if below configuration forward biases D1. D2 is clearly reverse biased. Would D1 drop 0.7 V and D2 drop 10-0.7 = 9.3 V? simulate this circuit – Schematic created using CircuitLab ...
1
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1answer
600 views

LED strip doesn't turn off completely by transistor

I've made a circuit with a touch switch module turning on/off a LED strip via a transistor, and the whole thing works, but in the "off" state the LED strip still shines a bit. Touch switch module I'm ...
0
votes
2answers
115 views

MOSFETs leaks current between two water sensors

Goal: I've got a set of EC and pH water sensors that need to sit in the same batch of water / capture values real-time for a Arduino project. However my sensors cancel each other out when both are ...
0
votes
1answer
619 views

BJT DC Leakage (ICES) dependency with Vce

I am interested in BJT transistor leakage dependency on Vce. Specifically: parameter ICES (Collector-Emitter Cutoff Leakage, that is, collector/emitter leakage with base shorted to emitter) is ...
1
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3answers
332 views

How can I Further Reduce Power Leak from BSS84 MOSFET?

I am working on a device which is running from a 3V coin cell. A system timer enables a MOSFET which starts the actual circuit (MCU etc.) for a very short time. The system timer (U1) only uses around ...
0
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1answer
48 views

Induction Motor - Reactances and Leakages

In the induction motor equivalent circuit (either Thevenin or otherwise), the rotor, and stator leakages and reactances are necessary for any useful calculations. How does one estimate leakages and ...
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2answers
3k views

What is the “CV” unit for leakage current in a capacitor datasheet?

I've looked at a few leakage current specifications for electrolytic capacitors, and they all seem to specify the value as something like this: I < 0.01 CV or 3 (μA) after 2 minutes, whichever ...
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2answers
390 views

Question regarding collector leakage current with open emitter

In a transistor, we know that current amplification factor \$ \alpha \$ (DC) for CB Configuration is given by: $$ \alpha = I_{C} / I_{E} $$ Where, \$I_{C}\$ = collector current; \$I_{E}\$ = ...
4
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1answer
198 views

Does a Guard Ring around a PLL loop filter make sense?

Should I guard a PLL loop filter against current leakage with a pour? If so, where can I connect the guard plane? As an illustration: I use an IC in need of an external PLL-loop-filter connected to ...
0
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2answers
1k views

Dynamic and Active Leakage in CMOS

I studied various techniques to reduce the leakage power consumption in CMOS design. Leakage currents can be static and active. I understand the meaning of static (standby) leakage, but I am ...
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1answer
198 views

Effect of increased leakage of PMOS in reversed inverter configuration

I have built the standard CMOS inverter in reversed configuration by putting NMOS on pull up side and PMOS on pull down side. This will work like a buffer but the the upper and lower bound of the ...
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3answers
2k views

The mysterious case of the random leakage current

Disclaimer: I already know the solution of this circuit debugging conundrum (and it is not trivial), and I'll post it after some time, so that other people could give their contribution to this ...
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4answers
756 views

PNP high side switch base current leak?

This is for a Raspberry Pi AVR ISP interface board. Most of the functionality is around level shifting the logic to the target board's voltage. This is achieved with a 74ABT125 chip. It's powered by ...
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1answer
341 views

Leakage current to heat sink

I am working to lower the leakage current in an isolated power supply. The power supply uses an isolation transformer to step down from 120V/240V to 6.5V. The voltage is then rectified and run ...
4
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2answers
463 views

Why is there a resistor in a cmos X-OR gate?

While reading up on logic gates i came across this image on Wikipedia: According to the article, the resistor on the supply voltage for the inverter is necessary to ensure that no current is leaked ...
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2answers
242 views

What is the purpose of this bias resistor?

I am unsure what the following statement on page 4 of this application note (Over Voltage Protection Circuit for Automotive Load Dump) means. Resistor R4 provides a small amount of bias to Q2 in ...
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2answers
273 views

How the transistor works in this 555 circuit?

555 Is not able to provide long timing due to its leakage current. The following circuit is very useful to build a long time timer such as 1 hour or more. The accuracy of the time is not important ...
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1answer
266 views

How to stop leakage of mains adaptor [closed]

For the past year or so I have been using a mains to 5VDC adaptor to charge various devices. Everything is working perfectly fine but this charger I think, has a noticable leak to the low voltage side ...
0
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3answers
293 views

Strange IC input leakage current

I am reading the datasheet of the HEF4894BT. First I saw the input clamping current is rated at 10mA and than I saw the input leakage current would be 10mA, too. I thought the input clamping current ...
5
votes
1answer
489 views

Switching regulator enable pin low, but output isn't fully off. Why?

I'm working on a battery-powered application using two Texas Instruments switching regulators and a Linear Technology pushbutton power controller: I have confirmed that when I push the button and ...
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4answers
6k views

MOSFET Drain-to-Source Leakage Current over voltage and temperature

I'd like to know what's the characteristic curve of Idss in N-Channel MOSFET transistors over different Vds values at high temperature. As I've checked datasheets (like Fairchild's 2N7000 or FDC637BNZ)...
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2answers
140 views

KCL equation considering the leakage current

simulate this circuit – Schematic created using CircuitLab In the schematics shown here I want to find out the potential at Va and Vb nodes with assuming a constant leakage current Ileak ...
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1answer
52 views

Using super-cutoff to reduce Direct Source to Drain Tunnelling

I was wondering if anyone had any insight on how useful it would be to reduce direct source to drain tunnelling by applying negative gate bias voltages on sub-10nm FinFETs. Has anyone looked at this ...