CN208623542U - A kind of the protection circuit and driving circuit of switch element - Google Patents
A kind of the protection circuit and driving circuit of switch element Download PDFInfo
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- CN208623542U CN208623542U CN201821147083.7U CN201821147083U CN208623542U CN 208623542 U CN208623542 U CN 208623542U CN 201821147083 U CN201821147083 U CN 201821147083U CN 208623542 U CN208623542 U CN 208623542U
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Abstract
The utility model provides a kind of protection circuit of switch element; wherein switch element includes first end, second end and control terminal; protecting circuit includes: the first protection pipe, has first end, second end and control terminal, the first end of the first end coupling switch element of the first protection pipe；Second protection pipe; with first end, second end and control terminal; the wherein control terminal of the first end coupling switch element of the second protection pipe, the second end of the second end coupling switch element of the second protection pipe, the control terminal of the second protection pipe couple the second end of the first protection pipe.The protection circuit can prevent or reduce the time that concatenated two switch elements simultaneously turn on, and make system reliable operation, and enable the power consumption that system is effectively reduced in high-frequency drive, improve power-efficient.
Description
Technical field
The utility model relates to electronic circuit fields, and in particular to a kind of the protection circuit and driving circuit of switch element.
Background technique
In semiconductor field, there is the application of upper down tube on-off alternately, such as push-pull circuits.Such as Fig. 1
Shown in shown in switch element Q1 and Q2, switch element Q1 and Q2 be coupled in series in power input VDD and ground terminal GND it
Between, when Q2 conducting, Q1 is controlled as turning off, and Q2 collector terminal voltage is low level at this time.But when switch element Q1 is controlled
End control signal for turn off Q1 when, the parasitic capacitance as existing for switch element Q1 base stage and inter-collector, base voltage by
High voltage will be maintained in that will not be mutated, so that switch element Q1 maintains the on state of a period of time, in this way, switch element Q1
It will be simultaneously turned on Q2, and generate biggish immediate current, and cause the loss of electric energy, and even result in the damage of switch element Q1 or Q2
It is bad.When switch element Q1 and Q2 is with higher frequency alternate conduction, which will cause biggish power loss.
In other applications, when switch element switches from conducting to off state, due to the parasitic electricity of switch element
The presence of appearance, it is also possible to cause the shutdown of switch element to lag, so as to lead to the generation of larger immediate current.In high frequency shape
Under state, power loss caused by the immediate current will cause large effect to the performance of electronic product.
Utility model content
For demand in the prior art, a purpose of the utility model is to propose that one kind is intended to eliminate above-mentioned one kind
Or number of drawbacks protection circuit and comprising protect circuit driving circuit.
To solve the above-mentioned problems, the one aspect of the utility model proposes a kind of protection circuit of switch element,
Middle switch element includes first end, second end and control terminal, and protection circuit includes: the first protection pipe, has first end, second end
And control terminal, the first end of the first end coupling switch element of the first protection pipe；And second protection pipe, there is first end, the
Two ends and control terminal, wherein the control terminal of the first end coupling switch element of the second protection pipe, the second end coupling of the second protection pipe
The second end of switch element is connect, the control terminal of the second protection pipe couples the second end of the first protection pipe.
In one embodiment, switch element, the first protective switch and the second protective switch are triode.
In one embodiment, protection circuit further comprises resistance, is had a first end and a second end, the first end of resistance
Couple the control terminal of the first protection pipe, the second end of the second end coupling switch element of resistance.
In one embodiment, triode is NPN pipe, and wherein first end is collector, and second end is emitter, control terminal
For base stage.
In one embodiment, protection circuit described in any of the above-described embodiment is applied to push-pull output circuit, recommends defeated
Circuit includes first via output circuit and No. second output circuit out, and first via output circuit includes the switch element and second
Switch element, No. second output circuit include third switch element and the 4th switch element, wherein switch element and second switch
Element is coupled in series between power input and ground terminal, and third switch element and the 4th switch element are coupled in series in power supply
Between input terminal and ground terminal.In one embodiment, coupling buzzer is put in the coupling of switch element and second switch element
First end and No. second output circuit, so that when second switch element conductive, third switching elements conductive, to further make
Switch element cut-off；The second end and first via output of the coupling point coupling buzzer of third switch element and the 4th switch element
Circuit, so that when four switching elements conductives, the switching elements conductive, so that third switch element further be made to end.
In one embodiment, above-mentioned protection circuit further comprises simultaneously turning on suppression circuit, described to simultaneously turn on suppression
Circuit processed has input terminal and output end, wherein simultaneously turning on the control of the input terminal coupling second switch element of suppression circuit
End simultaneously turns on the control terminal of the output end coupling switch element of suppression circuit.
Another aspect according to the present utility model proposes a kind of driving circuit for driving electronic device, feature
It is, the driving circuit includes: first via output circuit, including first switching element and second switch element, first switch
Element and second switch element are coupled in series between power input and ground terminal, first switching element and second switch element
Coupling point coupling electronic device a first end；No. second output circuit, including third switch element and the 4th switch element, the
Three switch elements and the 4th switch element are coupled in series between power input and ground terminal, and third switch element and the 4th is opened
Close the second end of the coupling point coupling electronic device of element；And as above described in any embodiment for protecting first switch first
Part and/or the protection circuit for protecting third switch unit.
In one embodiment, the coupling point of first switching element and second switch element further couples the output of the second tunnel
The third switch element of circuit, so that when second switch element conductive, third switching elements conductive, switch element cut-off；The
The coupling point of three switch elements and the 4th switch element further couples the first switching element of first via output circuit, so that working as
When four switching elements conductives, first switching element conducting, the cut-off of third switch element.
In one embodiment, protection circuit further comprises simultaneously turning on suppression circuit, described to simultaneously turn on inhibition electricity
Road has input terminal and output end, wherein simultaneously turning on the control terminal of the input terminal coupling second switch element of suppression circuit, together
When conducting suppression circuit output end coupling first switching element control terminal.
In one embodiment, simultaneously turning on suppression circuit includes: third protection pipe, has first end, second end and control
End processed, wherein the control terminal of third protection pipe couples second switch element, and the second end of third protection pipe couples ground terminal；4th
Protection pipe has first end, second end and control terminal, wherein the first of the first end coupling third protection pipe of the 4th protection pipe
End, the second end of the 4th protection pipe couple power input by resistance；5th protection pipe has first end, second end and control
End processed, wherein the control terminal of the 5th protection pipe couples the control terminal of the 4th protection pipe, the second end of the 5th protection pipe couples power supply
Input terminal；6th protection pipe has first end, second end and control terminal, wherein the control terminal coupling the 5th of the 6th protection pipe is protected
The first end of pillar, the control terminal of the first end coupling switch element of the 6th protection pipe and the first end of the second protection pipe, the 6th
The second end of protection pipe couples power input.
In one embodiment, the first end of the 5th protection pipe and the control terminal of the 6th protection pipe couple third by resistance
The coupling point of switch element and the 4th switch element.
In one embodiment, driving circuit further comprises drive control circuit, have input terminal, intermediate output and
Drive output, the input terminal of drive control circuit couple driving signal, and the intermediate output of drive control circuit couples protection
Circuit, the control terminal of the output end coupling second switch of drive control circuit.
In one embodiment, drive control circuit includes: the 7th switching tube, has first end, second end and control terminal,
Wherein control terminal the first driving signal of coupling of the 7th switching tube, the first end coupling power input of the 7th switching tube, the 7th
The second end coupling protection circuit of switching tube；Second resistance has a first end and a second end, the first end of second resistance coupling the
The second end of seven switching tubes；8th switching tube has first end, second end and control terminal, wherein the control terminal of the 8th switching tube
With the second end of first end coupling second resistance, the second end of the 8th switching tube couples the control terminal of the 7th switching tube；9th opens
Guan Guan has first end, second end and control terminal, wherein the second end of the control terminal coupling second resistance of the 9th switching tube, the
The control terminal of the second end coupling second switch element of nine switching tubes, and ground terminal is coupled by resistance；Tenth switching tube, tool
There are first end, second end and control terminal, wherein the control terminal of the tenth switching tube and first end couple first switching element and second
The coupling point of switch element, the second end of the tenth switching tube couple the first end of the 9th switching tube.
Another aspect according to the present utility model proposes a kind of protection circuit of switch element, comprising: the first protection
Pipe, when switch element is transformed to off state by state, the parasitic capacitance of the first protection pipe makes at the first protection pipe
In on state and maintain a period of time；And second protection pipe, the on state of the first protection pipe make at the second protection pipe
In on state, the on state of the second protection pipe makes the control terminal potential of switch element be transformed to by the first current potential rapidly
Two current potentials, to rapidly switch off switch element.
It is according to the present utility model in another aspect, propose a kind of semiconductor driving chip, including switch as described above
Element and protection circuit.In one embodiment, semiconductor driving chip includes at least seven pins, for carrying out electricity with external
Connection.
Protection circuit and its push-pull output circuit in above-described embodiment, the shutdown that can prevent or reduce switch element are stagnant
Afterwards, the time that concatenated two switch elements simultaneously turn on is prevented or reduced, makes system reliable operation, and make in high-frequency drive
When the power consumption of system can be effectively reduced, improve power-efficient.
Detailed description of the invention
Fig. 1 is a kind of switch element schematic layout pattern of the prior art；
Fig. 2 is the schematic diagram according to the protection circuit for switch element of an embodiment of the present invention；
Fig. 3 is the specific schematic diagram according to the protection circuit for switch element of an embodiment of the present invention；
Fig. 4 is the schematic diagram according to the driving circuit of an embodiment of the present invention.
Identical label represents the same or similar component or composition in different schematic diagrames.
Specific embodiment
For a further understanding of the utility model, the utility model preferred embodiment is retouched below with reference to embodiment
It states, but it is to be understood that these descriptions are only the feature and advantage for further illustrating the utility model, rather than practical to this
The limitation of novel claim.
Just for several typical embodiments, the utility model is not limited to the model of embodiment description for the description of the part
It encloses.Some technical characteristics in same or similar prior art means and embodiment are replaced mutually also in the utility model
In the range of describe and claim.
" coupling " in specification includes to be directly connected to, also comprising being indirectly connected with, as by electrically-conducting medi such as conductor
Connection, wherein the electrically-conducting medi can contain parasitic inductance or parasitic capacitance.It may additionally include achievable same or similar function
By the connection of other active devices or passive device on the basis of purpose, such as by switching, following circuit circuit or component
Connection.
Fig. 2 shows the protection circuits 100 for switch element according to an embodiment of the present invention.Protect circuit
100 coupling switch element Q1 control terminal, for eliminate or slow down switch element Q1 by be connected be transformed to shutdown when shutdown it is stagnant
Aftereffect, or eliminate or reduce the time span that switch element Q1 and Q2 are simultaneously turned on.
Fig. 3 shows the protection circuit for switch element Q1 according to an embodiment of the present invention.Wherein protection electricity
Road includes the first protection pipe P1, the second protection pipe P2 and resistance R1.In the illustrated embodiment, the collector of the first protection pipe P1
(referred to as first end) couples the collector (first end) and power input of switch element Q1, base stage (control terminal) coupling of pipe P1
The first end of resistance R1, the emitter (second end) of the second end coupling switch element Q1 of resistance R1, the base of the second protection pipe P2
The emitter (second end) of pole (control terminal) coupling tube P1, the base stage of collector (first end) the coupling switch element Q1 of pipe P2
(control terminal), the emitter (second end) of emitter (second end) the coupling switch element Q1 of pipe P2.In the illustrated embodiment,
Switch element Q1, the first protection pipe P1 and the second protection pipe P2 are NPN type triodes, all have the base stage as control terminal,
Collector as first end and the emitter as second end.It should be known that in a further embodiment, switch element Q1,
First protection pipe P1 and the second protection pipe P2 can also be other kinds of transistor, for example realize other transistors of identical function
Combination, protection circuit may include PNP type triode or mosfet transistor.Although the protection circuit of diagram includes resistance
R1 it will nevertheless be understood that protection circuit may be detached from resistance R1 and realize identical function, for example the interconnection containing resistivity or is led
Body, or the control terminal of switch element, capacitor or protection pipe P1 couples and shares the element of other function circuit.
The explanation for continuing Fig. 3, when control signal S1 is transformed to high level by low level, second switch element Q2 is led
Logical, the end OUT1 voltage drops to rapidly ground potential.Controlling signal S2 is transformed to low level by high level simultaneously, is used for switch element
Q1 is transformed to off state by state.However, due to the parasitic capacitance C1's between switch element Q1 base stage and collector
In the presence of switch element Q1 both end voltage is unable to abrupt transients, so that Q1 will not be turned off rapidly, this will lead to switch element Q1 and Q2
It simultaneously turns on, forms biggish immediate current between power input VDD and ground terminal GND, influence device performance, and increase
Power consumption.At this point, the parasitic capacitance C2 between the collector-base of the first protection pipe P1 makes pipe P1 base voltage maintain higher electricity
Pressure a period of time, so that pipe P1 is on state.The on state of first protection pipe P1 makes the second protection pipe P2 base terminal electricity
Pressure is height, and such pipe P2 is also by a period of time in the conductive state.Therefore, pass through between switch element Q1 base terminal and emitter
Pipe P2 forms current path, the base voltage of switch element Q1 is dragged down rapidly, to rapidly switch off switch element Q1.By this
Protection circuit prevent or reduces switch element Q1 and second switch element Q2 and leads simultaneously so that switch element P1 is rapidly switched off
Logical state or duration, to reduce power consumption.When the parasitic capacitance of protection pipe P1 is not enough to maintain pipe P1 conducting,
The signal S2 of switch element Q1 control terminal is low level at this time, to continue the off state of control switch element Q1, until opening
Close the variation of element Q1 control end signal.
Fig. 4 shows the driving circuit according to an embodiment of the present invention.In this embodiment, driving circuit includes pushing away
Draw output circuit.The push-pull output circuit is two-way push-pull output circuit.Push-pull output circuit tool there are two output end OUT1 and
OUT2 is respectively coupled at the both ends of buzzer 403, for driving 403 sounding of buzzer.In a preferred embodiment, buzzer
403 include piezoelectric buzzer.In a further embodiment, push-pull output circuit can be used for driving other kinds of electronics device
Part.Driving circuit includes first via output circuit 401 and No. second output circuit 402, and wherein first via output circuit 401 includes
First switching element Q1 and second switch element Q2, No. second output circuit 402 include the switch of third switch element Q3 and the 4th
Element Q4.Wherein first switching element Q1 and second switch element Q2 be coupled in series in power input VDD and ground terminal GND it
Between, first switching element Q1 is located at hot end.Third switch element Q3 and the 4th switch element Q4 are also coupled in series in power supply
Between input terminal VDD and ground terminal GND, wherein third switch element Q3 is in hot end.Switch element Q1 and second switch
The coupling point OUT1 of element Q2 couples the first end of buzzer 403, the first output end OUT1 and the as the first drive output
The output end OUT2 of No. two output circuits 402 generates the voltage of alternately low and high level, together for driving buzzer 403.Switch
The coupling point OUT1 of element Q1 and second switch element Q2 further couples No. second output circuit 402, so that working as second switch
When element Q2 is connected, third switch element Q3 conducting ends first switching element Q1.As shown in figure 4, when switch
When element Q2 is connected, output end OUT1 is pulled down to ground level, and electric current from top to bottom is formed in resistance R3, and pipe P9 is connected, the
Three switch element Q3 base voltages increase, Q3 conducting, so that second output terminal OUT2 voltage increases.Due to third switch element Q3
The pipe P5's in protection circuit for passing through resistance coupling first via output circuit 401 with the coupling point OUT2 of the 4th switch element Q4
The control terminal of first end and pipe P6, the raising of switch element Q3 and Q4 coupling junction voltage OUT2 so that pipe P6 is turned off, thus with
In further turning off switch element Q1.Similarly, the coupling point OUT2 coupling of third switch element Q3 and the 4th switch element Q4
The second end and first via output circuit 401 of buzzer 403, so that switch element Q1 is led when the 4th switch element Q4 conducting
It is logical, third switch element Q3 cut-off.
It in one embodiment, further may include simultaneously turning on suppression circuit for the protection circuit of switch element Q1,
The input terminal coupling second switch element Q2 for simultaneously turning on suppression circuit simultaneously turns on the output end coupling switch member of suppression circuit
The control terminal of part Q1 is used in second switch element Q2 conducting, and generating control signal S2 turns off switch element Q1, the shutdown
Path ratio is connected by third switch element Q3, and the path for ending switch element Q1 faster turns off.Such as Fig. 4 institute
Show, simultaneously turning on suppression circuit includes third protection pipe P3, the 4th protection pipe P4, the 5th protection pipe P5 and the 6th protection pipe P6.
Wherein third protection pipe P3 has first end, second end and control terminal, and wherein the control terminal of third protection pipe P3 passes through pipe Q7 coupling
Signal input part PIN2 is met, and second switch element Q2 is coupled by pipe Q9, the second end of third protection pipe P3 couples ground connection
Hold GND；4th protection pipe P4 has first end, second end and control terminal, wherein the first end of the 4th protection pipe P4 couples third
The second end of the first end of protection pipe P3, the 4th protection pipe P4 couples power input VDD by resistance；5th protection pipe P5 tool
There are first end, second end and control terminal, wherein the control terminal of the 4th protection pipe P4 of control terminal coupling of the 5th protection pipe P5, the 5th
The second end of protection pipe P5 couples power input VDD；6th protection pipe P6 has first end, second end and control terminal, wherein
The control terminal of 6th protection pipe P6 couples the first end of the 5th protection pipe P5, and the first end of the 6th protection pipe P6 couples switch element
The second end of the first end of the control terminal of Q1 and the second protection pipe Q2, the 6th protection pipe P6 couples power input VDD.It is illustrating
Embodiment in, simultaneously turning on protection pipe in suppression circuit is NPN triode, and wherein first end is collector, and second end is
Emitter, control terminal are base stage.However, in other examples, the protection pipe simultaneously turned in suppression circuit may be
Other kinds of transistor generates signal S2 and turns off switch element Q1 for realizing when switch element Q2 conducting.Continue Fig. 4
Explanation, when signal input part PIN2 signal is high level for when Q2 is connected, P3 control terminal voltage to be high level, and P3 pipe leads
Logical, the control terminal and first end of P4 is low level, P4 pipe and the conducting of P5 pipe, P5 pipe first end voltage and pipe P6 control terminal voltage quilt
It draws high to input supply voltage VDD, pipe P6 and ends, for turning off switch element Q1.
Specifically, in one embodiment, push-pull output circuit includes the drive control electricity for driving switch element Q2
Road, for the drive control circuit of driving switch element Q4, the guarantor that is simultaneously turned on for preventing or slowing down switch element Q1 and Q2
Protection circuit and the protection circuit simultaneously turned on for preventing or slowing down switch element Q3 and Q4.As shown in figure 4, being used for the protection of Q1
Circuit includes protection pipe P1-P6 and several resistance R1 etc..Drive control circuit for driving switch element Q2 includes several
Transistor Q7-Q10 and several resistance unit R2 etc..Wherein the input terminal of drive control circuit is used to receive driving signal PIN2,
Drive output is used to couple the control terminal of switch element Q2, and output control signal carrys out driving switch element Q2.Drive control electricity
Road further have intermediate output for couple protect circuit, specifically coupling protection pipe P3 control terminal.Specifically, it drives
Dynamic control circuit includes the 7th switching tube Q7, second resistance R2, the 8th switching tube Q8, the 9th switching tube Q9 and the tenth switching tube
Q10.7th switching tube Q7 has first end, second end and control terminal, wherein the control terminal coupling signal of the 7th switching tube Q7 is defeated
Entering to hold the first driving signal of PIN2, the first end of the 7th switching tube Q7 couples power input VDD, and the of the 7th switching tube Q7
The protection pipe P3 of two ends coupling protection circuit；The first end of second resistance R2 couples the second end of the 7th switching tube Q7；8th opens
Closing pipe Q8 has first end, second end and control terminal, wherein the control terminal of the 8th switching tube Q8 and first end couple second resistance
The second end of R2, the second end of the 8th switching tube Q8 couple the control terminal of the 7th switching tube Q7；The control terminal of 9th switching tube Q9
Couple the second end of second resistance R2, the control terminal of the second end coupling second switch element Q2 of the 9th switching tube Q9, Yi Jitong
Cross resistance coupling ground terminal GND；Control terminal and first end the coupling first switching element Q1 and second switch of tenth switching tube G10
The second end of coupling the point OUT1, the tenth switching tube Q10 of element Q2 couple the first end of the 9th switching tube Q9.When the end PIN2 drives
When signal is high level, Q7 conducting, Q9 conducting, so that Q2 is connected.Certainly, drive control circuit can have other knots
Structure, so that the driving signal at signal input part PIN2 is used for driving switch element Q2.
In one embodiment, push-pull output circuit manufacture forms semiconductor and drives core on same semiconductor base
Piece.The semiconductor chip includes at least seven pin, respectively PIN1-PIN7, for being electrically connected with outside, wherein first
Pin PIN1 forms power input at the 4th pin PIN4 by diode for receiving external power supply VCC, external power supply VCC
Hold VDD.The second pin PIN2 as the first signal input part and the third pin PIN3 difference as second signal input terminal
For receiving driving signal.In a preferred embodiment, the first signal input part PIN2 and second signal input terminal PIN3
Complementary square-wave pulse is provided respectively, i.e., when the first signal input part PIN2 is high level, at second signal input terminal PIN3
Low level is provided, when the first signal input part PIN2 provides low level, provides high level at second signal input terminal PIN3, this
Sample provides the square-wave pulse of alternating, complementary, for driving buzzer at the first output end OUT1 and second output terminal OUT2
403.Wherein the first output end OUT1 forms the 6th pin PIN6, and second output terminal OUT2 forms the 7th pin PIN7.Ground terminal
Couple the 5th pin PIN5.
Protection circuit in through the foregoing embodiment, can be when switch element Q2 be connected, in other words in switch element Q1
When being transformed to shutdown by conducting, switch element Q1 is rapidly switched off, prevents or reduces the time that Q2 and Q1 are simultaneously turned on, make system work
Make reliable, and enables the power consumption that system is effectively reduced in high-frequency drive, improve power-efficient.
The method and its core concept of the above embodiments are only used to help understand the utility model.It should refer to
It out, for those skilled in the art, without departing from the principle of this utility model, can also be to this
Some improvement and modification can also be carried out for utility model, these improvement and modification also fall into the protection scope of the utility model claims
It is interior.
Claims (10)
1. a kind of protection circuit of switch element, wherein switch element includes first end, second end and control terminal, and feature exists
In protection circuit includes:
First protection pipe, has first end, second end and control terminal, and the first end of the first protection pipe couples the first of switch element
End；And
Second protection pipe has first end, second end and control terminal, wherein the first end coupling switch element of the second protection pipe
Control terminal, the second end of the second end coupling switch element of the second protection pipe, the first protection of control terminal coupling of the second protection pipe
The second end of pipe.
2. protection circuit as described in claim 1, which is characterized in that switch element, the first protective switch and the second protection are opened
Closing includes triode.
3. protection circuit as described in claim 1, which is characterized in that further comprise resistance, resistance has first end and the
Two ends, the first end of resistance couple the control terminal of the first protection pipe, the second end of the second end coupling switch element of resistance.
4. protection circuit as described in claim 1, which is characterized in that it further comprise simultaneously turning on suppression circuit, it is described same
When conducting suppression circuit have input terminal and output end, wherein simultaneously turn on suppression circuit input terminal coupling second switch element
Control terminal, simultaneously turn on suppression circuit output end coupling switch element control terminal.
5. a kind of driving circuit for driving electronic device, which is characterized in that the driving circuit includes:
First via output circuit, including first switching element and second switch element, first switching element and second switch element
It is coupled in series between power input and ground terminal, the coupling point of first switching element and second switch element couples electronics device
The first end of part；
No. second output circuit, including third switch element and the 4th switch element, third switch element and the 4th switch element
It is coupled in series between power input and ground terminal, the coupling point of third switch element and the 4th switch element couples electronics device
The second end of part；And
The protection circuit according to any one of claims 1-4 for being used to protect first switching element.
6. driving circuit as claimed in claim 5, it is characterised in that:
The coupling point of switch element and second switch element further couples the third switch element of No. second output circuit；
The coupling point of third switch element and the 4th switch element further couples the first switching element of first via output circuit.
7. driving circuit as claimed in claim 5, which is characterized in that protection circuit further comprises simultaneously turning on inhibition electricity
Road, the suppression circuit that simultaneously turns on is with input terminal and output end, wherein simultaneously turning on the input terminal coupling the of suppression circuit
The control terminal of two switch elements simultaneously turns on the control terminal of the output end coupling first switching element of suppression circuit.
8. driving circuit as claimed in claim 7, which is characterized in that simultaneously turning on suppression circuit includes:
Third protection pipe has first end, second end and control terminal, wherein the control terminal coupling second switch member of third protection pipe
The second end of part, third protection pipe couples ground terminal；
4th protection pipe has first end, second end and control terminal, wherein the first end of the 4th protection pipe couples third protection pipe
First end, the second end of the 4th protection pipe couples power input by resistance；
5th protection pipe has first end, second end and control terminal, wherein the control terminal of the 5th protection pipe couples the 4th protection pipe
Control terminal, the second end of the 5th protection pipe couples power input；
6th protection pipe has first end, second end and control terminal, wherein the control terminal of the 6th protection pipe couples the 5th protection pipe
First end, the 6th protection pipe first end coupling switch element control terminal and the second protection pipe first end, the 6th protection
The second end of pipe couples power input.
9. driving circuit as claimed in claim 8, which is characterized in that the control of the first end and the 6th protection pipe of the 5th protection pipe
End processed couples the coupling point of third switch element and the 4th switch element by resistance.
10. driving circuit as claimed in claim 5, which is characterized in that further comprise drive control circuit, there is input
The input terminal of end, intermediate output and drive output, drive control circuit couples driving signal, the centre of drive control circuit
Output end coupling protection circuit, the control terminal of the output end coupling second switch of drive control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821147083.7U CN208623542U (en) | 2018-07-19 | 2018-07-19 | A kind of the protection circuit and driving circuit of switch element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821147083.7U CN208623542U (en) | 2018-07-19 | 2018-07-19 | A kind of the protection circuit and driving circuit of switch element |
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| CN208623542U true CN208623542U (en) | 2019-03-19 |
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| CN201821147083.7U Active CN208623542U (en) | 2018-07-19 | 2018-07-19 | A kind of the protection circuit and driving circuit of switch element |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880222A (en) * | 2018-07-19 | 2018-11-23 | 杭州百隆电子有限公司 | A kind of the protection circuit and push-pull output circuit of switch element |
| CN116760400A (en) * | 2023-08-16 | 2023-09-15 | 青岛嘉展力芯半导体有限责任公司 | Cascade structure and electronic device |
-
2018
- 2018-07-19 CN CN201821147083.7U patent/CN208623542U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880222A (en) * | 2018-07-19 | 2018-11-23 | 杭州百隆电子有限公司 | A kind of the protection circuit and push-pull output circuit of switch element |
| CN108880222B (en) * | 2018-07-19 | 2024-03-22 | 杭州百隆电子有限公司 | Protection circuit and push-pull output circuit of switching element |
| CN116760400A (en) * | 2023-08-16 | 2023-09-15 | 青岛嘉展力芯半导体有限责任公司 | Cascade structure and electronic device |
| CN116760400B (en) * | 2023-08-16 | 2023-11-07 | 青岛嘉展力芯半导体有限责任公司 | Cascade structure and electronic device |
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