CN206992670U - A kind of new DC inserts the locked protection circuit of current limliting - Google Patents
A kind of new DC inserts the locked protection circuit of current limliting Download PDFInfo
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- CN206992670U CN206992670U CN201720464459.6U CN201720464459U CN206992670U CN 206992670 U CN206992670 U CN 206992670U CN 201720464459 U CN201720464459 U CN 201720464459U CN 206992670 U CN206992670 U CN 206992670U
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- resistance
- triode
- current limliting
- unilateral diode
- locked
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Abstract
The utility model discloses a kind of new DC to insert the locked protection circuit of current limliting, DC is connected including battery supply with LED to insert, drive circuit and controlling switch are provided between battery supply and LED connections DC are inserted, drive circuit includes the 7th resistance, 8th resistance and metal-oxide-semiconductor, the locked circuit of current limliting is additionally provided between battery supply and LED connections DC are inserted, the locked circuit of current limliting includes first resistor, second resistance, charging capacitor, first triode, second triode, 3rd resistor, 4th resistance, 5th resistance, 6th resistance, comparator, first unilateral diode, second unilateral diode and the 3rd unilateral diode.Structure setting of the present utility model is reasonable, and it sets the locked circuit of current limiting, when the electric current for flowing through the 6th resistance reaches setting value, solve the technical deficiency that excessive load is easily damaged product, and stability in use is good and strong applicability.
Description
Technical field
The utility model belongs to DC and inserts protection circuit technical field, and a kind of new DC of specific design inserts the locked protection electricity of current limliting
Road.
Background technology
Careless battery-powered products are more and more, in the case of the load that supporting user uses can not determine, excessive load
Product is easily damaged, how to ensure not damage product using any load, is that those skilled in the art of the present technique need to solve
Technical problem.
The content of the invention
The purpose of this utility model is to provide the new DC that a kind of structure setting is reasonable and stability in use is good and inserts current limliting lock
Dead protection circuit.
The technical scheme for realizing the utility model purpose is that a kind of new DC inserts the locked protection circuit of current limliting, including battery electricity
Source connects DC with LED and inserted, and drive circuit and controlling switch, the drive are provided between the battery supply and LED connections DC are inserted
Dynamic circuit includes the 7th resistance, the 8th resistance and metal-oxide-semiconductor, is additionally provided between the battery supply and LED connections DC are inserted
The locked circuit of current limliting, the locked circuit of current limliting include first resistor, second resistance, charging capacitor, the first triode, the two or three
Pole pipe, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, comparator, the first unilateral diode, the second unilateral diode
With the 3rd unilateral diode, the emitter stage of first triode is connected to the connection that LED connections DC inserts positive pole and controlling switch
On point, colelctor electrode be connected to by the 7th resistance on the grid of metal-oxide-semiconductor and the base stage of the first triode by second resistance, fill
It is grounded after electric capacitor seriesing circuit, the first resistor is connected between base stage and the emitter stage of the first triode, and described second
The base stage of triode is connected on the colelctor electrode of the first triode by 3rd resistor, the colelctor electrode of the second triode is connected to
On the tie point of two resistance and charging capacitor and the emitter stage of the second triode passes through the first unilateral diode for being sequentially connected in series,
The negative pole ground connection of 3rd unilateral diode, an input of the comparator after two unilateral diodes and the 3rd unilateral diode
Ground connection, input in the same direction are connected to second by the output end of ground connection and comparator after the 5th resistance and the 6th resistance series circuit
In the base stage of triode, the 4th resistance is connected between the colelctor electrode of the first triode and the input in the same direction of comparator,
8th resistance is connected between the grid of metal-oxide-semiconductor and source electrode and the source electrode of metal-oxide-semiconductor is connected to the 5th resistance and the 6th resistance
Tie point on.
First triode is PNP type triode, and second triode is NPN type triode.
The metal-oxide-semiconductor is N-channel MOS pipe.
The utility model has positive effect：Structure setting of the present utility model is reasonable, and it sets the locked electricity of current limiting
Road, when the electric current for flowing through the 6th resistance reaches setting value, comparator work, make the first triode, the second triode and metal-oxide-semiconductor
It is turned off, so that load cisco unity malfunction, while charging capacitor charges, so that the first triode can not be opened, reaches
The purpose of locked circuit, disconnection controlling switch is needed just to restart when needing to reuse, so as to solve excessive load appearance
The technical deficiency of fragile product, stability in use is good and strong applicability.
Brief description of the drawings
In order that content of the present utility model is more likely to be clearly understood, below according to specific embodiment and combine attached
Figure, is described in further detail to the utility model, wherein：
Fig. 1 is electrical block diagram of the present utility model.
Embodiment
(embodiment 1)
Fig. 1 shows a kind of embodiment of the present utility model, and wherein Fig. 1 is that circuit structure of the present utility model shows
It is intended to.
See that Fig. 1, a kind of new DC insert the locked protection circuit of current limliting, including battery supply 1 connects DC with LED and inserts 2, described
Battery supply 1 and LED connections DC are provided with drive circuit 3 and controlling switch 4 between inserting 2, and the drive circuit 4 includes the 7th resistance
R7, the 8th resistance R8 and metal-oxide-semiconductor Q3, the locked electricity of current limliting is additionally provided between the battery supply 1 and LED connections DC insert 2
Road 5, the locked circuit 5 of current limliting include first resistor R1, second resistance R2, charging capacitor C1, the first triode Q1, the two or three
Pole pipe Q2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, comparator U1, the first unilateral diode D1,
Second unilateral diode D2 and the 3rd unilateral diode D3, the first triode Q1 emitter stage are connected to LED connections DC and insert 2
On the tie point of positive pole and controlling switch 4, colelctor electrode is connected on metal-oxide-semiconductor Q3 grid and the one or three by the 7th resistance R7
For pole pipe Q1 base stage by being grounded after second resistance R2, charging capacitor C1 series circuits, the first resistor R1 is connected to first
Between triode Q1 base stage and emitter stage, the base stage of the second triode Q2 is connected to the one or three pole by 3rd resistor R3
On pipe Q1 colelctor electrode, the second triode Q2 colelctor electrode is connected on second resistance R2 and charging capacitor C1 tie point and the
Two triode Q2 emitter stage passes through the first unilateral diode D1, the second unilateral diode D2 and the 3rd unidirectional two that are sequentially connected in series
3rd unilateral diode D3 negative pole ground connection after pole pipe D3, an input end grounding, the input in the same direction of the comparator U1 lead to
Ground connection and comparator U1 output end are connected to the second triode Q2's after crossing the 5th resistance R5 and the 6th resistance R6 series circuits
In base stage, the 4th resistance R4 is connected between the first triode Q1 colelctor electrode and comparator U1 input in the same direction, institute
State that the 8th resistance R8 is connected between metal-oxide-semiconductor Q3 grid and source electrode and metal-oxide-semiconductor Q3 source electrode is connected to the 5th resistance R5 and
On six resistance R6 tie point.
First triode is PNP type triode, and second triode is NPN type triode.
The metal-oxide-semiconductor is N-channel MOS pipe.
Its operation principle is summarized as follows：After load closure switch are connected, charged by resistance R1, R2 to electric capacity C1, three
Pole pipe Q1 is turned on, and provide base current by resistance R3 turns on to triode Q2, maintains triode Q1 conductings always；
Driving voltage is provided by resistance R7 to turn on to metal-oxide-semiconductor Q3, loads normal work
When flowing through resistance R6 electric current and being not up to setting value, comparator U1 is not turned on, and triode Q2 maintains to turn on always, and three
Pole pipe Q1, metal-oxide-semiconductor Q3 also maintain conducting always, load normal work；
When the electric current for flowing through resistance R6 reaches setting value, comparator U1 conductings, triode Q2 cut-offs, triode Q1 is simultaneously
It is also switched off, metal-oxide-semiconductor Q3 is also switched off without driving voltage hungry enough, loads cisco unity malfunction,
Driving current can not be provided because electric capacity C1 is fully charged, after cut-off gives triode Q1, triode Q1 not to open, electricity
Road is locked；
Reopening circuit and need to disconnecting controlling switch can just restart.
Structure setting of the present utility model is reasonable, and it sets the locked circuit of current limiting, when the electric current for flowing through the 6th resistance reaches
During to setting value, comparator work, it is turned off the first triode, the second triode and metal-oxide-semiconductor, so that load can not be normal
Work, at the same charging capacitor charge so that the first triode can not be opened, reach the purpose of locked circuit, when need again
Need disconnection controlling switch just to restart during use, so as to solve the technical deficiency that excessive load is easily damaged product, use
Stability is good and strong applicability.
Obviously, above-described embodiment of the present utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, in described above
On the basis of can also make other changes in different forms.There is no need and unable to give all embodiments
It is exhaustive.And these belong to the obvious changes or variations that connotation of the present utility model is extended out and still fall within this practicality
New protection domain.
Claims (3)
1. a kind of new DC inserts current limliting locked protection circuit, including battery supply connect DC with LED and inserted, in the battery supply and
LED connections DC is provided with drive circuit and controlling switch between inserting, and the drive circuit includes the 7th resistance, the 8th resistance and MOS
Pipe, it is characterised in that：The locked circuit of current limliting, the current limliting are additionally provided between the battery supply and LED connections DC are inserted
Locked circuit includes first resistor, second resistance, charging capacitor, the first triode, the second triode, 3rd resistor, the 4th electricity
Resistance, the 5th resistance, the 6th resistance, comparator, the first unilateral diode, the second unilateral diode and the 3rd unilateral diode, institute
The emitter stage for stating the first triode is connected to that LED connections DC is inserted on the tie point of positive pole and controlling switch, colelctor electrode is by the 7th
Resistance is connected on the grid of metal-oxide-semiconductor and the base stage of the first triode is followed by by second resistance, charging capacitor series circuit
Ground, the first resistor are connected between base stage and the emitter stage of the first triode, and the base stage of second triode passes through
Three resistance are connected on the colelctor electrode of the first triode, the colelctor electrode of the second triode is connected to second resistance and charging capacitor
On tie point and the emitter stage of the second triode passes through the first unilateral diode, the second unilateral diode and the 3rd that are sequentially connected in series
The negative pole ground connection of 3rd unilateral diode after unilateral diode, an input end grounding, the input in the same direction of the comparator lead to
The output end of ground connection and comparator is connected in the base stage of the second triode after crossing the 5th resistance and the 6th resistance series circuit, institute
State the 4th resistance to be connected between the colelctor electrode of the first triode and the input in the same direction of comparator, the 8th resistance is connected to
Between the grid and source electrode of metal-oxide-semiconductor and the source electrode of metal-oxide-semiconductor is connected on the tie point of the 5th resistance and the 6th resistance.
2. new DC according to claim 1 inserts the locked protection circuit of current limliting, it is characterised in that：First triode is
PNP type triode, second triode are NPN type triode.
3. new DC according to claim 2 inserts the locked protection circuit of current limliting, it is characterised in that：The metal-oxide-semiconductor is N-channel
Metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720464459.6U CN206992670U (en) | 2017-04-28 | 2017-04-28 | A kind of new DC inserts the locked protection circuit of current limliting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720464459.6U CN206992670U (en) | 2017-04-28 | 2017-04-28 | A kind of new DC inserts the locked protection circuit of current limliting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206992670U true CN206992670U (en) | 2018-02-09 |
Family
ID=61393196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720464459.6U Active CN206992670U (en) | 2017-04-28 | 2017-04-28 | A kind of new DC inserts the locked protection circuit of current limliting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206992670U (en) |
-
2017
- 2017-04-28 CN CN201720464459.6U patent/CN206992670U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230104 Address after: 529000 Room 203, Floor 2, Building 1, No. 21, Jintong Road, Tangxia Town, Pengjiang District, Jiangmen City, Guangdong Province Patentee after: Jiangmen Xiaosong Intelligent Technology Co.,Ltd. Address before: 529000 301, Floor 3, Building 2, No. 21, Jintong Road, Tangxia Town, Pengjiang District, Jiangmen City, Guangdong Province Patentee before: JIANGMEN PENGJIANG DISTRICT JINYING TECHNOLOGY Co.,Ltd. |