CN108429236A - A kind of leakage protection circuit and method - Google Patents
A kind of leakage protection circuit and method Download PDFInfo
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- CN108429236A CN108429236A CN201810143661.8A CN201810143661A CN108429236A CN 108429236 A CN108429236 A CN 108429236A CN 201810143661 A CN201810143661 A CN 201810143661A CN 108429236 A CN108429236 A CN 108429236A
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 80
- 238000012512 characterization method Methods 0.000 claims abstract description 11
- 230000005611 electricity Effects 0.000 claims description 8
- 238000007689 inspection Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/44—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to the rate of change of electrical quantities
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/025—Current limitation using field effect transistors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Keying Circuit Devices (AREA)
Abstract
The invention discloses a kind of leakage protection circuit and method, leakage protection circuit includes：Current detection circuit, detection flow through the electric current for being connected to the first switch on major loop, obtain the current detection signal that characterization flows through first switch electric current, and the current detection signal is less than first threshold, then judges that there are leakies for input terminal；Control circuit, the turn-on and turn-off for controlling first switch, during the first switch conducting described in detection-phase, the current detection circuit detection flows through the electric current of first switch, if the current detection signal is less than first threshold, the first switch is controlled by control circuit and is turned off；If the current detection signal reaches first threshold, the first switch continues to be connected, and Current limited Control is carried out to first switch after detection-phase and/or first switch continue conducting.The present invention, which can limit, flows through the maximum current of switching tube to protect switching tube.
Description
Technical field
The present invention relates to power electronics fields, more specifically, being related to a kind of earth leakage protective circuit and method.
Background technology
In loading installation process, because of the logical situation of possible generating unit tap during the installation process, if human body is not small at this time
The heart contacts, then is easy to get an electric shock, influences safety operation.For example, in lighting area, since more lamp holder also maintains both-end access
Interface, when being replaced to original fluorescent tube, fluorescent tube general or using double-width grinding.The double-width grinding refer to by
The connector of ac input end is respectively provided at lamp tube ends, and in this case, lamp is generally first inserted into one end therein by operator
Seat, is then inserted into the other end, since operator's hand needs to grasp, in the end of fluorescent tube, to be likely to be exposed the gold of end conduction
The case where belonging to, being easy to happen electric shock, therefore be important to the earth leakage protective in the case of this kind.
It is connected with switching tube in power supply and power stage circuit in the prior art, is first connected when starting entire circuit work
Switching tube detects the electric current by switching tube, using the size of the electric current to determine whether leaky occurs, when the electric current is small
When given threshold, when determining input terminal generation leaky, on-off switching tube cuts off entire circuit, to leak electricity
Protection maintains switching tube conducting state if the electric current is more than the threshold value.But in the prior art, in some cases, such as exist
When being in contact bad phenomenon after detection-phase or switching tube conducting, the electric current for flowing through switching tube is excessive, can damage switching tube.
Invention content
In view of this, the present invention proposes a kind of leakage protection circuit and method that can be limited and flow through switch tube current, use
In solving to flow through switch in the prior art, tube current is larger in turn results in the technical issues of switching tube is easily damaged.
The present invention provides a kind of leakage protection circuits, including：
Current detection circuit, detection flow through the electric current for being connected to the first switch on major loop, obtain characterization and flow through first
The current detection signal of switching current, the current detection signal are less than first threshold, then it is existing to judge that input terminal has electric leakage
As；
Control circuit controls the turn-on and turn-off of first switch, described during the first switch conducting described in detection-phase
Current detection circuit detects the electric current for flowing through first switch, if the current detection signal is less than first threshold, by control electricity
Road controls the first switch shutdown；If the current detection signal reaches first threshold, the first switch continues to be connected,
Current limited Control is carried out to first switch after detection-phase and/or first switch continue conducting.
Optionally, the leakage protection circuit further includes voltage detecting circuit, voltage detecting circuit detection input voltage
Or the voltage of the first switch first end or the pressure difference of the first switch first end and second end, obtain voltage detecting letter
Number, the voltage detection signal reaches second threshold, and control circuit controls the first switch conducting, current detection circuit detection
Flow through the electric current of first switch.
Optionally, after the first switch shutdown, current detection circuit carries out detection of electrical leakage again.
Optionally, the control circuit includes current-limiting circuit, the current-limiting circuit detection-phase and/or first switch after
The maximum current for flowing through first switch is limited to setting value after continuous conducting.
Optionally, in the detection-phase, when the first current signal of the electric current that characterization flows through the first switch reaches
When to third threshold value, the current-limiting circuit carries out Current limited Control to the first switch.
Optionally, after the first switch continues conducting, when characterization flows through the first electricity of the electric current of the first switch
When stream signal reaches four threshold values, the current-limiting circuit carries out Current limited Control to the first switch, and the 4th threshold value is less than
The third threshold value.
Optionally, the current-limiting circuit includes the first operational amplifier and second switch or/and third switch, and described the
The first input end of one operational amplifier receives third threshold value through second switch, or/and is switched through third and receive the 4th threshold value, institute
The second input terminal for stating the first operational amplifier connects the second end of the first switch, the output of first operational amplifier
End connects the control terminal of the first switch.
Optionally, in the detection-phase, the second switch is closed, and the third switch disconnects；It is opened described first
After closing conducting, the second switch disconnects, and the third switch is closed.
Optionally, the first switch is metal-oxide-semiconductor, and the first end of the first switch is drain electrode, the first switch
Second end is source electrode, and the control terminal of the first switch is grid.
The present invention also provides a kind of earth leakage protecting methods, including：
Detection flows through the electric current for being connected to the first switch on major loop, obtains the electric current that characterization flows through first switch electric current
Signal is detected, the current detection signal is less than first threshold, then judges that there are leakies for input terminal；
The turn-on and turn-off for controlling first switch, during the first switch conducting described in detection-phase, the current detecting
Circuit detects the electric current for flowing through first switch, if the current detection signal is less than first threshold, institute is controlled by control circuit
State first switch shutdown；If the current detection signal reaches first threshold, the first switch continues to be connected, in detection rank
Section and/or first switch carry out Current limited Control after continuing conducting to first switch.
Compared with prior art, the technical solution of the present invention has the following advantages：The present invention overcomes flow in the prior art
It is easily damaged technical problem through switching the larger switching tube that in turn results in of tube current, by the control circuit of leakage protection circuit
Current-limiting circuit is introduced to open in the detection-phase and conducting phase pair first of first switch on the basis of original earth leakage protective
Put row Current limited Control into so that the electric current for flowing through first switch is unlikely to excessive.The present invention is by introducing current-limiting circuit, to electric leakage
The maximum current for flowing through first switch in protection circuit when different phase is defined, to ensure that the electricity for flowing through first switch
Stream is unlikely to excessive, and then protects first switch.
Description of the drawings
Fig. 1 is the structural schematic diagram of leakage protection circuit of the present invention；
Fig. 2 is the specific embodiment of leakage protection circuit of the present invention.
Specific implementation mode
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any replacement made in the spirit and scope of the present invention, modification, equivalent method and scheme.
In order to make the public have thorough understanding to the present invention, it is described in detail in following present invention preferred embodiment specific
Details, and description without these details can also understand the present invention completely for a person skilled in the art.
The present invention is more specifically described by way of example with reference to attached drawing in the following passage.It should be noted that attached drawing is adopted
Use with more simplified form and non-accurate ratio, only to it is convenient, lucidly aid in illustrating the embodiment of the present invention
Purpose.
Fig. 1 is the structural schematic diagram of leakage protection circuit of the present invention, and the leakage protection circuit includes current detecting electricity
Road, control circuit, in the present solution,
The current detection circuit, detection flow through the electric current for the first switch M1 being connected on major loop, obtain characterization stream
Current detection signal through first switch M1 electric currents, the current detection signal are less than first threshold, then judge that input terminal is deposited
In leaky；
The control circuit, the turn-on and turn-off of control first switch M1, the first switch M1 described in detection-phase are connected
Period, the current detection circuit detection flows through the electric current of first switch M1, if the current detection signal is less than first threshold,
Then the first switch M1 is controlled by control circuit to turn off；If the current detection signal reaches first threshold, described first
Switch M1 continues to be connected, and Current limited Control is carried out to first switch M1 after detection-phase and/or first switch M1 continue conducting.
The control circuit includes current-limiting circuit, and the current-limiting circuit continues to lead in detection-phase and/or first switch M1
The maximum current for flowing through first switch M1 is limited to setting value after logical.The setting value and first switch M1 of detection-phase continue to lead
Setting value after logical is different, and it is big that the setting value of detection-phase than the first switch M1 continues the setting value after opening.
After the first switch M1 is turned off, the current detection circuit restarts to carry out detection of electrical leakage.
Wherein, the detection-phase refers to that the current detection circuit carries out the detection of electrical leakage stage；Described first opens
It closes after M1 continues conducting and refers to that current detection circuit carries out detection of electrical leakage completion, and leaky does not occur, described first opens
It closes M1 and starts normally.
The major loop, as operating circuit, the first switch M1 can control the turn-on and turn-off of major loop.
In the present invention, in the current detection circuit detection of electrical leakage stage, the control circuit will flow through the first switch M1
The maximum value of electric current is limited in third threshold value, and the current detection circuit detection flows through the electric current of first switch M1, characterized
The current detection signal of first switch M1 electric currents is flowed through, if the current detection signal is less than first threshold, judges to input
There are leaky, the control circuit directly turns off the first switch M1 at end.It is described if leaky does not occur for judgement
The maximum value for flowing through the first switch M1 electric currents is limited in the 4th threshold value by control electric current, and the third threshold value is more than described
First threshold, and the 4th threshold value is less than the first threshold.
The leakage protection circuit can also include voltage detecting circuit, and what voltage detecting circuit can detect is input terminal
Voltage, then at this time two input terminals of voltage detecting circuit be connected to the both ends of rectifier bridge, alternating current input power supplying both ends
Or an output end of rectifier bridge and wherein one end of alternating current input power supplying, unless otherwise indicated, power input either
Ac input end can also be the output end of rectifier bridge.Voltage detecting circuit can also detect the first switch M1 first ends
Voltage or the first switch M1 first end and second ends pressure difference, then at this time voltage detecting circuit two input terminals difference
For the first end and second end of the first switch M1 first ends and ground or the first switch M1.Voltage inspection in the case of two kinds
The output end of slowdown monitoring circuit is connect with control circuit, when voltage detecting circuit detects input terminal voltage or the first switch M1
When the voltage of one end or the pressure difference of the first switch M1 first end and second ends are second threshold, the current detection circuit inspection
Electric current of the flow measurement through first switch M1, control circuit will flow through the maximum value of the first switch M1 electric currents during this
It is limited in third threshold value.Using voltage detecting circuit the advantage is that a threshold value can be determined by voltage detecting circuit, i.e.,
It is detected when two threshold values, that is to say, that input voltage at this time is certain, makes first switch M1 conductings during this time simultaneously
Current detecting is carried out, obtained current detection signal actually characterizes the internal resistance of circuit, and internal resistance whether due to electric leakage is
Different (i.e. whether someone's body impedance accesses) can be believed if human body access, which occurs, causes drain conditions by the current detecting
It number characterizes.
Fig. 2 gives the specific embodiment of a leakage protection circuit of the present invention.The control circuit includes current-limiting circuit
And logic circuit, the current-limiting circuit includes the first operational amplifier U1 and second switch S2 or/and third switch S3, described
The first input end of first operational amplifier U1 receives third threshold value Vref3 through second switch S2, or/and is connect through third switch S2
The 4th threshold value Vref4 is received, the second input terminal of the first operational amplifier U1 connects the second end of the first switch M1, institute
The output end for stating the first operational amplifier U1 connects the control terminal of the first switch M1.
Voltage detecting circuit includes that the voltage detecting circuit includes bleeder circuit and comparator comp2, the partial pressure
Electric routing resistance R2 and R3 is composed in series, two input terminal be connected to the both ends of rectifier bridge, alternating current input power supplying two
End or an output end of rectifier bridge and wherein one end of alternating current input power supplying, dotted portion indicates possible connection side in figure
Formula is illustrated and is illustrated in figure to connection type.The first input end connection bleeder circuit of the comparator comp2
Output end is the common end of resistance R2 and R3, and the second input terminal of the comp2 of comparator receives the letter for characterizing the second threshold
Number Vref2, when the voltage detection signal reaches Vref2, then comparator comp2 is overturn, and the second switch is closed, described
Third switch disconnects, and the current-limiting circuit carries out Current limited Control to first switch, and the current detection circuit starts detection of electrical leakage.
Current detection circuit includes sampling resistor R1 and comparator comp1, and sampling resistor R1 connects with first switch M1, electricity
Pressure detection circuit detects that voltage detection signal reaches second threshold, and current detection circuit samples the electricity for flowing through first switch M1
Stream, and the first input end of input comparator comp1, the second input terminal of comparator comp1 receive the letter of characterization first threshold
Number Vref1 indicates that, there are leaky, first switch M1 is disconnected, and waiting is leaked next time when current detection signal is less than Vref1
Electro-detection.If the current detecting reaches Vref1, show that leaky does not occur, then the second switch disconnects, the third
Switch is closed, and the first switch continues to be connected, and detection of electrical leakage is completed, and the current-limiting circuit continues to be connected laggard to first switch
Row current limliting.
In addition, the case where voltage detecting circuit detection input voltage is simply shown in Fig. 1 and Fig. 2, but voltage detecting
Circuit is detected as the voltage of the first switch first end or the pressure difference of the first switch first end and second end also in this hair
In bright protection domain.
In addition, the voltage or detection of voltage detecting circuit difference detection input voltage and detection first switch M1 first ends
The pressure difference of first switch pipe first end and second end, the second threshold differ, and it is convenient to be used for the purpose of narration here.
Although embodiment is separately illustrated and is illustrated above, it is related to the common technology in part, in ordinary skill
Personnel apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and the content recorded is not known, then
It can refer to another embodiment on the books.
Embodiments described above does not constitute the restriction to the technical solution protection domain.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution made by within the spirit and principle of mode
Within enclosing.
Claims (10)
1. a kind of leakage protection circuit, which is characterized in that including：
Current detection circuit, detection flow through the electric current for being connected to the first switch on major loop, obtain characterization and flow through first switch
The current detection signal of electric current, the current detection signal are less than first threshold, then judge that there are leakies for input terminal；
Control circuit controls the turn-on and turn-off of first switch, during the first switch conducting described in detection-phase, the electric current
Detection circuit detects the electric current for flowing through first switch, if the current detection signal is less than first threshold, by control circuit control
Make the first switch shutdown；If the current detection signal reaches first threshold, the first switch continues to be connected, and is examining
Survey stage and/or first switch carry out Current limited Control after continuing conducting to first switch.
2. leakage protection circuit according to claim 1, it is characterised in that：The leakage protection circuit further includes voltage inspection
The voltage or the first switch first of slowdown monitoring circuit, voltage detecting circuit detection input voltage or the first switch first end
The pressure difference at end and second end obtains voltage detection signal, and the voltage detection signal reaches second threshold, and control circuit controls institute
First switch conducting is stated, current detection circuit detects the electric current for flowing through first switch.
3. leakage protection circuit according to claim 1 or 2, it is characterised in that：After the first switch shutdown, electric current inspection
Slowdown monitoring circuit carries out detection of electrical leakage again.
4. leakage protection circuit according to claim 1 or 2 or 3, it is characterised in that：The control circuit includes current limliting electricity
Road, the current-limiting circuit limit the maximum current for flowing through first switch after detection-phase and/or first switch continue conducting
In setting value.
5. leakage protection circuit according to claim 1, it is characterised in that：In the detection-phase, when characterization flows through
When first current signal of the electric current of the first switch reaches third threshold value, the current-limiting circuit carries out the first switch
Current limited Control.
6. leakage protection circuit according to claim 1, it is characterised in that：After the first switch continues conducting, when
When first current signal of the electric current that characterization flows through the first switch reaches four threshold values, the current-limiting circuit is to described first
Switch carries out Current limited Control, and the 4th threshold value is less than the third threshold value.
7. leakage protection circuit according to claim 5 or 6, it is characterised in that：The current-limiting circuit includes the first fortune
It calculates amplifier and second switch or/and third switch, the first input end of first operational amplifier is received through second switch
Third threshold value, or/and switched through third and receive the 4th threshold value, the second input terminal connection described the of first operational amplifier
The second end of one switch, the output end of first operational amplifier connect the control terminal of the first switch.
8. leakage protection circuit according to claim 7, it is characterised in that：In the detection-phase, the second switch
It is closed, the third switch disconnects；After first switch conducting, the second switch disconnects, and the third switch is closed.
9. leakage protection circuit according to claim 1 or 2 or 3, it is characterised in that：The first switch is metal-oxide-semiconductor, institute
The first end for stating first switch is drain electrode, and the second end of the first switch is source electrode, and the control terminal of the first switch is grid
Pole.
10. a kind of earth leakage protecting method, which is characterized in that including：
Detection flows through the electric current for being connected to the first switch on major loop, obtains the current detecting that characterization flows through first switch electric current
Signal, the current detection signal are less than first threshold, then judge that there are leakies for input terminal；
The turn-on and turn-off for controlling first switch, during the first switch conducting described in detection-phase, the current detection circuit
Detection flows through the electric current of first switch, if the current detection signal is less than first threshold, described the is controlled by control circuit
One switch OFF；If the current detection signal reaches first threshold, the first switch continues to be connected, in detection-phase
And/or first switch continues to carry out Current limited Control to first switch after being connected.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017100856468 | 2017-02-17 | ||
| CN201710085646 | 2017-02-17 |
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| CN108429236A true CN108429236A (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810139245.0A Pending CN108233332A (en) | 2017-02-17 | 2018-02-10 | A kind of leakage protection circuit and method |
| CN201810140125.2A Pending CN108270195A (en) | 2017-02-17 | 2018-02-10 | leakage protection circuit and method |
| CN201820240165.XU Active CN208174237U (en) | 2017-02-17 | 2018-02-10 | leakage protection circuit |
| CN201820241918.9U Active CN208174241U (en) | 2017-02-17 | 2018-02-10 | A kind of leakage protection circuit |
| CN201810143966.9A Pending CN108462150A (en) | 2017-02-17 | 2018-02-11 | leakage protection circuit and method |
| CN201810143661.8A Pending CN108429236A (en) | 2017-02-17 | 2018-02-11 | A kind of leakage protection circuit and method |
| CN201820247590.1U Active CN208174246U (en) | 2017-02-17 | 2018-02-11 | leakage protection circuit |
| CN201820247694.2U Active CN208174243U (en) | 2017-02-17 | 2018-02-11 | A kind of leakage protection circuit |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810139245.0A Pending CN108233332A (en) | 2017-02-17 | 2018-02-10 | A kind of leakage protection circuit and method |
| CN201810140125.2A Pending CN108270195A (en) | 2017-02-17 | 2018-02-10 | leakage protection circuit and method |
| CN201820240165.XU Active CN208174237U (en) | 2017-02-17 | 2018-02-10 | leakage protection circuit |
| CN201820241918.9U Active CN208174241U (en) | 2017-02-17 | 2018-02-10 | A kind of leakage protection circuit |
| CN201810143966.9A Pending CN108462150A (en) | 2017-02-17 | 2018-02-11 | leakage protection circuit and method |
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| CN201820247590.1U Active CN208174246U (en) | 2017-02-17 | 2018-02-11 | leakage protection circuit |
| CN201820247694.2U Active CN208174243U (en) | 2017-02-17 | 2018-02-11 | A kind of leakage protection circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233332A (en) * | 2017-02-17 | 2018-06-29 | 杰华特微电子（杭州）有限公司 | A kind of leakage protection circuit and method |
| CN111148309B (en) * | 2018-10-16 | 2023-08-25 | 卡任特照明解决方案有限公司 | Lamp driving circuit and method for operating the same |
| US10976762B2 (en) * | 2018-10-26 | 2021-04-13 | Rolls-Royce North American Technologies, Inc. | Control of an electrical power system responsive to sensing a ground fault |
| CN110601134A (en) * | 2019-09-10 | 2019-12-20 | 杰华特微电子（杭州）有限公司 | Leakage protection circuit, protection method and lighting circuit applying leakage protection circuit |
| CN110601133A (en) * | 2019-09-10 | 2019-12-20 | 杰华特微电子（杭州）有限公司 | Leakage protection circuit, protection method and lighting circuit applying leakage protection circuit |
| CN111368500A (en) | 2020-03-06 | 2020-07-03 | 杰华特微电子（杭州）有限公司 | Method for establishing metal interconnection layer capacitance prediction model and model system |
| CN115441399A (en) * | 2020-05-26 | 2022-12-06 | 芯海科技（深圳）股份有限公司 | Leakage protection circuit, integrated circuit, electronic device, and method |
| CN111983440B (en) * | 2020-07-16 | 2023-03-24 | 中广核核电运营有限公司 | Socket detection method and socket detection device |
| CN113014128A (en) * | 2021-03-26 | 2021-06-22 | 安徽电气工程职业技术学院 | DCAC control circuit in domestic dc-to-ac converter |
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- 2018-02-10 CN CN201820240165.XU patent/CN208174237U/en active Active
- 2018-02-10 CN CN201820241918.9U patent/CN208174241U/en active Active
- 2018-02-11 CN CN201810143966.9A patent/CN108462150A/en active Pending
- 2018-02-11 CN CN201810143661.8A patent/CN108429236A/en active Pending
- 2018-02-11 CN CN201820247590.1U patent/CN208174246U/en active Active
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| CN204216632U (en) * | 2014-11-27 | 2015-03-18 | 北京拓盛电子科技有限公司 | Battery discharge prevention circuit |
| US20160172999A1 (en) * | 2014-12-10 | 2016-06-16 | Monolithic Power Systems, Inc. | Switching controller with over voltage protection and switching converter and method thereof |
| CN105929929A (en) * | 2016-05-13 | 2016-09-07 | 上海墨百意信息科技有限公司 | Circuit for eliminating electric leakage of device in shutdown state |
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| CN208174243U (en) * | 2017-02-17 | 2018-11-30 | 杰华特微电子（杭州）有限公司 | A kind of leakage protection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN208174237U (en) | 2018-11-30 |
| CN208174246U (en) | 2018-11-30 |
| CN108462150A (en) | 2018-08-28 |
| CN108233332A (en) | 2018-06-29 |
| CN208174241U (en) | 2018-11-30 |
| CN108270195A (en) | 2018-07-10 |
| CN208174243U (en) | 2018-11-30 |
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