CN209730792U - Short-circuit protection circuit and electronic equipment - Google Patents
Short-circuit protection circuit and electronic equipment Download PDFInfo
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- CN209730792U CN209730792U CN201920918896.XU CN201920918896U CN209730792U CN 209730792 U CN209730792 U CN 209730792U CN 201920918896 U CN201920918896 U CN 201920918896U CN 209730792 U CN209730792 U CN 209730792U
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Abstract
The utility model discloses a kind of short-circuit protection circuit and electronic equipments.The utility model is separately connected by power supply protection circuit and power supply, bleeder circuit and load, and bleeder circuit is separately connected with power supply and load, and bleeder circuit is also grounded；Wherein, bleeder circuit generates driving voltage for detecting load voltage, and according to load voltage；Power supply protection circuit, for when loading normal, driving voltage to drive power supply protection circuit conducting, for load supplying；In load short circuits; driving voltage drives power supply protection circuit shutdown; to stop as load supplying; do not use additional power protection class IC; the protection to circuit when short circuit occurs can be realized using only simple circuit element; short circuit problem in the solution circuit of low cost, due to effective solution short circuit caused by the user misoperation or other reasons existing for use risk problem safely.
Description
Technical field
The utility model relates to power technique fields more particularly to a kind of short-circuit protection circuits and electronic equipment.
Background technique
With the development of electronic technology, the especially rapid development of portable electronic product, power unit produce electronics
Product are more and more important, and the quality of power circuit directly affects the development of entire electronic product, the form of consumer electronics product
Increasingly various, product function becomes increasingly abundant, so ensureing that the stability of product function and safety are just very crucial, wherein short circuit
Protection is exactly more important one.
Short-circuit protection IC is mostly used to design greatly about power unit short-circuit protection at this stage, although this design can be fine
Solve the problems, such as short-circuit protection, but short-circuit protection IC price is higher, does not have cost advantage, so that it is competing to enable product not have
Power is striven, another part is exactly the circuit of design certainly, but since the component used is more, logic is complex, so that PCB
Difficulty may be generated in layout.
Utility model content
The main purpose of the utility model is to provide a kind of short-circuit protection circuit and electronic equipments, it is intended to solve existing skill
Short circuit protects the technical issues of higher cost in art.
To achieve the above object, the utility model provides a kind of short-circuit protection circuit, and the circuit includes power supply protection electricity
Road and bleeder circuit；The power supply protection circuit is separately connected with power supply, the bleeder circuit and load, the partial pressure electricity
Road is separately connected with the power supply and the load, and the bleeder circuit is also grounded；Wherein,
The bleeder circuit generates driving voltage for detecting load voltage, and according to load voltage；
The power supply protection circuit is used for when loading normal, the driving voltage driving power supply protection circuit conducting, with
For the load supplying；In the load short circuits, the driving voltage driving power supply protection circuit shutdown, to stop being described
Load supplying.
Preferably, the bleeder circuit includes detection unit and driving unit；The detection unit and the power supply,
The load, the driving unit and the power supply protection circuit are separately connected；The driving unit and power supply protection electricity
Road and the power supply are separately connected, and the driving unit is also grounded.
Preferably, the detection unit includes first resistor, and the first resistor is in parallel with the power supply protection circuit, institute
The first end for stating first resistor is also connect with the power supply, the second end of the first resistor also with it is described load and it is described
Driving unit is separately connected.
Preferably, the driving unit includes second resistance, 3rd resistor, the 4th resistance, the 5th resistance and triode；Its
In,
The first end of the second resistance is connect with the second end of the first resistor, the second end of the second resistance with
The base stage of the triode connects, and the second end of the second resistance is also grounded through the 3rd resistor；
The collector of the triode is connect with the first end of the 4th resistance, the emitter ground connection of the triode；
The second end of 4th resistance and the first end of the power supply protection circuit and the 5th resistance are separately connected；
The first end of 5th resistance is connect with the power supply protection circuit, the second end of the 5th resistance with it is described
Power supply and the power supply protection circuit are separately connected.
Preferably, the power supply protection circuit includes metal-oxide-semiconductor；The source electrode of the metal-oxide-semiconductor and the power supply, described the
The first end of one resistance and the second end of the 5th resistance are separately connected, the grid of the metal-oxide-semiconductor and the 5th resistance
First end and the second end of the 4th resistance are separately connected；The drain electrode of the metal-oxide-semiconductor and second end, the institute of the first resistor
The first end and the load for stating second resistance are separately connected.
Preferably, the driving unit further includes the 6th resistance, the 7th resistance and the 8th resistance；The of 6th resistance
One end is connect with the emitter of the triode, and the second end of the 6th resistance is successively through the 7th resistance and the described 8th
Resistance eutral grounding.
It preferably, further include input filter circuit and/or output filter circuit；Wherein,
The input filter circuit connects respectively with the power supply, the power supply protection circuit and the bleeder circuit
It connects, the input filter circuit is also grounded；
The output filter circuit is separately connected with the load, the power supply protection circuit and the bleeder circuit, institute
Output filter circuit is stated also to be grounded.
Preferably, the input filter circuit includes the 9th resistance, the tenth resistance and first capacitor；9th resistance with
First end is connect with the power supply after tenth resistor coupled in parallel, the after the 9th resistance and the tenth resistor coupled in parallel
Two ends are separately connected with the power supply protection circuit and the bleeder circuit, after the 9th resistance and the tenth resistor coupled in parallel
Third end is grounded through the first capacitor.
Preferably, the output filter circuit includes eleventh resistor, twelfth resistor and the second capacitor；Described 11st
First end is separately connected with the power supply protection circuit and the bleeder circuit after resistance is in parallel with the twelfth resistor, described
Second end and the load connect after eleventh resistor is in parallel with the twelfth resistor, the eleventh resistor and the described tenth
Third end is through second capacity earth after two resistor coupled in parallel.
The utility model also proposes a kind of electronic equipment, and the electronic equipment includes short-circuit protection circuit as described above.
The utility model is separately connected by power supply protection circuit and power supply, bleeder circuit and load, bleeder circuit
It is separately connected with power supply and load, bleeder circuit is also grounded；Wherein, bleeder circuit, for detecting load voltage, and according to
Load voltage generates driving voltage；Power supply protection circuit, for when loading normal, driving voltage driving power supply protection circuit to be led
It is logical, for load supplying；In load short circuits, driving voltage drives power supply protection circuit shutdown, to stop not having for load supplying
Have using additional power protection class IC, the protection that short circuit occurs for circuit can be realized using only simple circuit element,
Short circuit problem in the solution circuit of low cost, effective solution short circuit caused by user misoperation or other reasons due to, deposit
Safe handling risk problem.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is a kind of functional block diagram of short-circuit protection circuit first embodiment of the utility model；
Fig. 2 is a kind of structural schematic diagram of short-circuit protection circuit first embodiment of the utility model；
Fig. 3 is a kind of structural schematic diagram of short-circuit protection circuit second embodiment of the utility model.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 100 | Bleeder circuit | R1~R12 | First resistor is to twelfth resistor |
| 110 | Detection unit | C1~C2 | First capacitor is to the second capacitor |
| 120 | Driving unit | Q1 | Triode |
| 200 | Power supply protection circuit | Q2 | Metal-oxide-semiconductor |
| 300 | Input filter circuit | VCC | Power supply |
| 400 | Output filter circuit | DC_OUT | Output end |
| RL | Load | GND | Ground connection |
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is to be appreciated that if related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction is only used for explaining opposite between each component under a certain particular pose (as shown in the picture)
Positional relationship, motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, if relating to the description of " first ", " second " etc. in the utility model embodiment, " first ", " the
Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning
The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one
A this feature.It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not within the protection scope of the requires of the utility model.
The utility model provides a kind of short-circuit protection circuit.
Referring to Fig.1, in the first embodiment, the circuit includes power supply protection circuit 200 and bleeder circuit 100；It is described
Power supply protection circuit 200 and power supply VCC, the bleeder circuit 100 and load RL are separately connected, the bleeder circuit 100
It is separately connected with the power supply VCC and the load RL, the bleeder circuit 100 is also grounded；Wherein, the bleeder circuit
100, driving voltage is generated for detecting load voltage, and according to load voltage；The power supply protection circuit 200, for negative
When carrying normal, the driving voltage driving power supply protection circuit 200 is connected, for load RL power supply；In the load RL
When short-circuit, the driving voltage driving power supply protection circuit 200 is turned off, and is that the load RL powers to stop.
It should be understood that power supply VCC is the power supply in electronic equipment, supply voltage is generally 15V, when
So or other values, the present embodiment are without restriction to this.
It should be noted that power unit short-circuit protection mostly uses greatly short-circuit protection IC, but short-circuit protection IC price is higher,
The present embodiment generates the control signal of power supply protection circuit 200 according to load voltage by the voltage of detection load RL, thus real
Circuit is protected when detecting short circuit now, by triode, metal-oxide-semiconductor and several resistance, these common electronic components are
A kind of low cost and high performance short-circuit protection scheme may be implemented, realize the use process in most portable electronic products
In easily occur to carry out short-circuit protection under the scene of short circuit to circuit, and then keep product safer, ensure the use peace of consumer
Entirely.
It is the structural schematic diagram of the utility model first embodiment referring to Fig. 2, Fig. 2.
Further, the bleeder circuit 100 includes detection unit 110 and driving unit 120；The detection unit 110
It is separately connected with the power supply VCC, the load RL, the driving unit 120 and the power supply protection circuit 200；Institute
It states driving unit 120 to be separately connected with the power supply protection circuit 200 and the power supply VCC, the driving unit 120 is also
Ground connection.
It should be understood that detection unit 110 is used to detect the voltage of load RL, judge that load RL is by load voltage
No short circuit passes through driving unit 120 and power supply protection circuit 200 is driven to be connected, realize the confession to load RL when load RL is normal
Electricity, when loading RL short circuit, 110 earth-return circuit of detection unit, and driving unit 120 is not turned on, power supply protection circuit 200 is not yet
Conducting realizes short-circuit protection to disconnect to load RL power supply.
Specifically, the detection unit 110 includes first resistor R1, the first resistor R1 and the power supply protection circuit
200 is in parallel, and the first end of the first resistor R1 is also connect with the power supply VCC, the second end of the first resistor R1
Also it is separately connected with the load RL and the driving unit 120.
Specifically, the driving unit 120 includes second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5
And triode Q1；Wherein, the first end of the second resistance R2 is connect with the second end of the first resistor R1, second electricity
The second end of resistance R2 is connect with the base stage of the triode Q1, and the second end of the second resistance R2 is also through the 3rd resistor R3
Ground connection；The collector of the triode Q1 is connect with the first end of the 4th resistance R4, and the emitter of the triode Q1 connects
Ground；The second end of the 4th resistance R4 and the first end of the power supply protection circuit 200 and the 5th resistance R5 connect respectively
It connects；The first end of the 5th resistance R5 is connect with the power supply protection circuit 200, the second end of the 5th resistance R5 and institute
It states power supply VCC and the power supply protection circuit 200 is separately connected.
Specifically, the power supply protection circuit 200 includes metal-oxide-semiconductor Q2；The source electrode and the power supply of the metal-oxide-semiconductor Q2
The second end of VCC, the first end of the first resistor R1 and the 5th resistance R5 are separately connected, the grid of the metal-oxide-semiconductor Q2
It is separately connected with the first end of the 5th resistance R5 and the second end of the 4th resistance R4；The drain electrode of the metal-oxide-semiconductor Q2 with
The second end of the first resistor R1, the first end of the second resistance R2 and the load RL are separately connected.
It will be appreciated that power supply VCC first passes around first resistor R1, the second electricity when short circuit does not occur for load RL
Hinder R2,3rd resistor R3 partial pressure, triode Q1 is connected, then power supply VCC by the 4th resistance R4, the 5th resistance R5,
The triode Q1 of conducting is formed into a loop, and the grid for metal-oxide-semiconductor Q2 provides driving voltage, and metal-oxide-semiconductor Q2 is connected, thus to after system
End load RL power supply；When loading RL generation short circuit, triode Q1 base voltage is zero, and triode Q1 is not turned on, metal-oxide-semiconductor Q2
It is not turned on, power supply VCC with being directly under first resistor R1, realizes short-circuit protection, until short-circuit abnormal disappearance, and can weigh
Newly restore electricity.
The present embodiment divides vertical component by using 1 triode, 1 metal-oxide-semiconductor, several resistance etc. to realize and short circuit occurs
When protection to circuit, short circuit problem in inexpensive solution circuit, effective solution is because of user misoperation or other are former
Risk problem is used safely existing for due to caused short circuit.
Referring to Fig. 3, Fig. 3 is the structural schematic diagram of the second embodiment proposed based on first embodiment.
Further, the driving unit 120 further includes the 6th resistance R6, the 7th resistance R7 and the 8th resistance R8；It is described
The first end of 6th resistance R6 is connect with the emitter of the triode Q1, and the second end of the 6th resistance R6 successively passes through described
7th resistance R7 and the 8th resistance R8 ground connection.
It should be noted that since transcient short circuit time may have the possibility that high current burns out metal-oxide-semiconductor Q2, so earth-return
3 resistance of middle series connection reduce impact of the transcient short circuit time high current for metal-oxide-semiconductor Q2, wherein when supply voltage is 15V, the first electricity
The resistance value for hindering R1 is 10K Ω, the resistance value of second resistance R2 is 47K Ω, the resistance value of 3rd resistor R3 is 4.7K Ω, the 4th resistance R4
Resistance value be 10K Ω, the resistance value of the 5th resistance R5 is 10K Ω, the model of the model 2N3904 of triode Q1, metal-oxide-semiconductor Q2
When 2SJ517, the resistance value for loading RL are 100K Ω, in order to be burned metal-oxide-semiconductor Q2 not, the 6th resistance R6, the 7th resistance R7 and the
The resistance value of eight resistance R8 is preferably all 50m Ω.
Further, short-circuit protection circuit further includes input filter circuit 300 and/or output filter circuit 400；Wherein,
The input filter circuit 300 and power supply VCC, the power supply protection circuit 200 and the bleeder circuit 100 are distinguished
Connection, the input filter circuit 300 are also grounded；The output filter circuit 400 and load RL, power supply protection electricity
Road 200 and the bleeder circuit 100 are separately connected, and the output filter circuit 300 is also grounded.
Specifically, the input filter circuit 300 includes the 9th resistance R9, the tenth resistance R10 and first capacitor C1；It is described
First end is connect with the power supply VCC after 9th resistance R9 is in parallel with the tenth resistance R10, the 9th resistance R9 and
Second end is separately connected with the power supply protection circuit 200 and the bleeder circuit 100 after the tenth resistance R10 is in parallel, institute
State the 9th resistance R9 it is in parallel with the tenth resistance R10 after third end be grounded through the first capacitor C1.
Specifically, the output filter circuit 400 includes eleventh resistor R11, twelfth resistor R12 and the second capacitor
C2；First end and the power supply protection circuit 200 and institute after the eleventh resistor R11 is in parallel with the twelfth resistor R12
Bleeder circuit 100 is stated to be separately connected, after the eleventh resistor R11 is in parallel with the twelfth resistor R12 second end with it is described
RL connection is loaded, third end connects through the second capacitor C2 after the eleventh resistor R11 is in parallel with the twelfth resistor R12
Ground.
It should be noted that input terminal be added RC circuit, input signal can be filtered, output end be added by
The RC circuit for the capacitor composition that the resistance and capacitance that resistance value is 4.7 Ω are 2.2uF, is to avoid transcient short circuit time, it is possible to create
Pyrophoric behavio(u)r, energy absorption therein is handled.
The present embodiment increases input filter circuit by three resistance of connecting in earth-return, in input terminal, in output end
Increase output filter circuit, protection when effectively realizing short circuit to element each in circuit, increase short-circuit protection can
By property.
In the concrete realization, it is emulated using Multisim, simulates the state of short-circuit protection circuit in normal operation
And working condition when short circuit occurs.
1) when not occurring short circuit in circuit, channel oscilloscope 1,2,3 be respectively circuit output end DC_OUT output voltage,
Metal-oxide-semiconductor Q2 grid voltage and triode Q1 base voltage, when supply voltage is 15V, the resistance value of first resistor R1 is 10K Ω,
The resistance value of two resistance R2 is 47K Ω, the resistance value of 3rd resistor R3 is 4.7K Ω, the resistance value of the 4th resistance R4 is 10K Ω, the 5th electricity
The resistance value of resistance R5 is 10K Ω, the resistance value of the model 2SJ517 of the model 2N3904 of triode Q1, metal-oxide-semiconductor Q2, load RL are
When 100K Ω, oscilloscope display output voltage is 15V, and triode Q1 base voltage is 667mV, and triode Q1 meets conducting item
Part, metal-oxide-semiconductor Q2 grid voltage are 7.53V, and metal-oxide-semiconductor Q2 source voltage is 15V, VGS=-7.47V, | VGS|>Vt, VtRefer to MOS
The conducting voltage of pipe, metal-oxide-semiconductor Q2 meet turn-on condition, and circuit bio-occlusion loads RL power supply.
2) when short circuit occurs for circuit, three probes are set in circuit, wherein the detection of probe 1 passes through the electricity of metal-oxide-semiconductor Q2
Stream, probe 2 detect output voltage, and probe 3 detects metal-oxide-semiconductor Q2 grid voltage.The pulse current of probe 1 is up to 11A, when maintenance
Between be about 20us, if using the metal-oxide-semiconductor of 2SJ517 or AP2309 model, the electric current completely in metal-oxide-semiconductor safety operation area,
Metal-oxide-semiconductor Q2 can steady operation, short circuit occur after, metal-oxide-semiconductor Q2 grid voltage is increased to 15V, illustrate triode Q1 close no longer
Conducting, metal-oxide-semiconductor Q2 are also turned off, do not export externally, and short-circuit protection is had an effect.
By the result that emulates above it is found that the short-circuit protection circuit meets the requirement when short circuit occurs for circuit, Ke Yiyou
The low cost and high performance short-circuit protection purpose of the realization of effect.
The utility model also proposes a kind of electronic equipment, and the electronic equipment includes short-circuit protection circuit as described above,
The circuit structure of the short-circuit protection circuit of the electronic equipment can refer to above-described embodiment, and details are not described herein；It is understood that
It is, since the electronic equipment of the present embodiment uses the technical solution of above-mentioned short-circuit protection circuit, the electronic equipment tool
There are above-mentioned all beneficial effects；It should be understood that the electronic equipment can be smart phone, tablet computer, smart television
Etc. equipment, the present embodiment it is without restriction to this.
The above is only the preferred embodiments of the utility model, and therefore it does not limit the scope of the patent of the utility model, all
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in
Other related technical areas are also included in the patent protection scope of the utility model.
Claims (10)
1. a kind of short-circuit protection circuit, which is characterized in that including power supply protection circuit and bleeder circuit；The power supply protection circuit
It is separately connected with power supply, the bleeder circuit and load, the bleeder circuit divides with the power supply and the load
It does not connect, the bleeder circuit is also grounded；Wherein,
The bleeder circuit generates driving voltage for detecting load voltage, and according to load voltage；
The power supply protection circuit, for when loading normal, the driving voltage driving power supply protection circuit to be connected, for institute
State load supplying；In the load short circuits, the driving voltage driving power supply protection circuit shutdown, to stop as the load
Power supply.
2. short-circuit protection circuit as described in claim 1, which is characterized in that the bleeder circuit includes detection unit and driving
Unit；The detection unit connects respectively with the power supply, the load, the driving unit and the power supply protection circuit
It connects；The driving unit is separately connected with the power supply protection circuit and the power supply, and the driving unit is also grounded.
3. short-circuit protection circuit as claimed in claim 2, which is characterized in that the detection unit includes first resistor, described
First resistor is in parallel with the power supply protection circuit, and the first end of the first resistor is also connect with the power supply, described
The second end of first resistor is also separately connected with the load and the driving unit.
4. short-circuit protection circuit as claimed in claim 3, which is characterized in that the driving unit includes second resistance, third
Resistance, the 4th resistance, the 5th resistance and triode；Wherein,
The first end of the second resistance is connect with the second end of the first resistor, the second end of the second resistance with it is described
The base stage of triode connects, and the second end of the second resistance is also grounded through the 3rd resistor；
The collector of the triode is connect with the first end of the 4th resistance, the emitter ground connection of the triode；
The second end of 4th resistance and the first end of the power supply protection circuit and the 5th resistance are separately connected；
The first end of 5th resistance is connect with the power supply protection circuit, the second end and the power supply of the 5th resistance
Power supply and the power supply protection circuit are separately connected.
5. short-circuit protection circuit as claimed in claim 4, which is characterized in that the power supply protection circuit includes metal-oxide-semiconductor；It is described
The source electrode of metal-oxide-semiconductor and the second end of the power supply, the first end of the first resistor and the 5th resistance are separately connected,
The grid of the metal-oxide-semiconductor is separately connected with the first end of the 5th resistance and the second end of the 4th resistance；The metal-oxide-semiconductor
Drain electrode with the second end of the first resistor, the first end of the second resistance and it is described load be separately connected.
6. short-circuit protection circuit as claimed in claim 4, which is characterized in that the driving unit further includes the 6th resistance,
Seven resistance and the 8th resistance；The first end of 6th resistance is connect with the emitter of the triode, the 6th resistance
Second end is successively through the 7th resistance and the 8th resistance eutral grounding.
7. such as short-circuit protection circuit described in any one of claims 1 to 6, which is characterized in that further include input filter circuit
And/or output filter circuit；Wherein,
The input filter circuit is separately connected with the power supply, the power supply protection circuit and the bleeder circuit, institute
Input filter circuit is stated also to be grounded；
The output filter circuit is separately connected with the load, the power supply protection circuit and the bleeder circuit, described defeated
Filter circuit is also grounded out.
8. short-circuit protection circuit as claimed in claim 7, which is characterized in that the input filter circuit include the 9th resistance,
Tenth resistance and first capacitor；9th resistance is connect with first end after the tenth resistor coupled in parallel with the power supply,
9th resistance connects with second end after the tenth resistor coupled in parallel with the power supply protection circuit and the bleeder circuit respectively
It connects, the 9th resistance is grounded with third end after the tenth resistor coupled in parallel through the first capacitor.
9. short-circuit protection circuit as claimed in claim 7, which is characterized in that the output filter circuit includes the 11st electricity
Resistance, twelfth resistor and the second capacitor；First end and the power supply after the eleventh resistor is in parallel with the twelfth resistor
Protection circuit and the bleeder circuit are separately connected, second end and institute after the eleventh resistor is in parallel with the twelfth resistor
Load connection is stated, third end is through second capacity earth after the eleventh resistor is in parallel with the twelfth resistor.
10. a kind of electronic equipment, which is characterized in that including short-circuit protection electricity as claim in any one of claims 1 to 9
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920918896.XU CN209730792U (en) | 2019-06-17 | 2019-06-17 | Short-circuit protection circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920918896.XU CN209730792U (en) | 2019-06-17 | 2019-06-17 | Short-circuit protection circuit and electronic equipment |
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| CN209730792U true CN209730792U (en) | 2019-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112165067A (en) * | 2020-09-03 | 2021-01-01 | 四川遂宁市利普芯微电子有限公司 | Overcurrent protection circuit |
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2019
- 2019-06-17 CN CN201920918896.XU patent/CN209730792U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112165067A (en) * | 2020-09-03 | 2021-01-01 | 四川遂宁市利普芯微电子有限公司 | Overcurrent protection circuit |
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