CN207603205U - A kind of overvoltage, current foldback circuit - Google Patents
A kind of overvoltage, current foldback circuit Download PDFInfo
- Publication number
- CN207603205U CN207603205U CN201721804442.7U CN201721804442U CN207603205U CN 207603205 U CN207603205 U CN 207603205U CN 201721804442 U CN201721804442 U CN 201721804442U CN 207603205 U CN207603205 U CN 207603205U
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- integrated circuit
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Abstract
The utility model is related to a kind of overvoltage, current foldback circuits; including resistance R1; resistance R2; resistance R3; resistance R4; resistance R5, resistance R6, integrated circuit modules U1; field-effect tube Q1; zener diode D1, the overvoltage, current foldback circuit, certainly product input voltage is excessively high and the excessive automatic protection functions technical problem of load current; voltage, the electric current of load input can be automatically adjusted; it avoids because voltage, electric current do not meet the power reguirements of load, and load is caused to damage, have the advantages that circuit is simple and reliable, cost-effective.
Description
Technical field
The utility model electronic circuit technology field, and in particular to a kind of overvoltage, current foldback circuit.
Background technology
At present, with the rapid development of semiconductor technology, the use of integrated circuit has spread all over every field, particularly with
Circuit controls the switching circuit of class（Such as：DC-DC circuit minimizes switching circuit circuit）, be widely used in power electronics,
Military project, scientific research, industrial control equipment, communication apparatus, instrument and meter, switching equipment, access device, mobile communication, router communication, work
The fields such as industry control, automotive electronics, aerospace.Due to using switching circuit set up circuit system have the design cycle it is short, can
By the features such as property is high, system upgrade is easy, the application of switching circuit is more and more extensive.With semiconductor technology, encapsulation technology and
A large amount of uses of high-frequency soft switch, the power density of switching circuit is increasing, and transfer efficiency is higher and higher, using also increasingly
Simply, it is currently a popular to complete overvoltage detection and over-current detection using semiconductor circuit, input electricity with semiconductor electronic switch cutoff
Road achievees the purpose that protect late-class circuit.
Large-scale industrial production management needs corresponding industrial automation equipment to perform, the contactors such as switching circuit
Circuit is also widely used in industrial automation equipment.But it is applied in industrial automation equipment in severe industrial environment
In the case of, voltage on circuit cable, which usually exists, to rise sharply or the phenomenon that rapid drawdown, and what is thereby resulted in over-pressed and under-voltage all may
Switching circuit is damaged.Wherein, circuit cable during wiring may mistake access high pressure or due to heavy load
It is switched in or out causing generating high surge voltage on circuit-line, excessive pressure damages is caused to circuit.On especially into
Row wrong line can damage the device of whole circuit, cause certain economic loss.
In the prior art, semiconductor circuit is easily damaged in the case where there is surge voltage, and component usage quantity is more,
Complicated, this reduces the efficiency of circuit, and invalid power consumption increases the burden of chip cooling, influences circuit
Stability, simultaneously as component usage quantity is more in circuit, the probability of failure is higher, reduces circuit entirety
Reliability.
Therefore, how to solve the problems, such as the over-voltage over-current protection for switching circuit circuit, become as skill urgently to be resolved hurrily
Art problem.
At present, general consumer electronics product easily generates moment overvoltage or load in circuit start or operation
Excessive electric current can be generated under short circuit or overload situations, so as to be damaged to electron product circuit, it is therefore necessary in circuit
It is middle to increase a kind of over-voltage over-current protection circuit to increase the safety of circuit.
Invention content
The purpose of this utility model is to provide a kind of overvoltage, current foldback circuit, including resistance R1, resistance R2, resistance R3,
Resistance R4, resistance R5, resistance R6, integrated circuit modules U1, field-effect tube Q1, zener diode D1, one end of the resistance R1
It is electrically connected with the pin 6 of integrated circuit modules U1, the other end of resistance R1 is electrically connected with circuit input anode；Zener diode D1
Cathode be electrically connected with the pin 6 of integrated circuit modules U1, the anode of zener diode D1 is electrically connected with ground terminal；The resistance
One end of R2 is electrically connected with the pin 1 of integrated circuit modules U1, and the other end of resistance R2 is electrically connected with circuit output anode；It is described
One end of resistance R3 is electrically connected with the pin 1 of integrated circuit modules U1, the other end and the integrated circuit modules U1 of the resistance R3
Pin 2 be electrically connected, meanwhile, the pin 2 of integrated circuit modules U1 is electrically connected with ground terminal, the pin 2 of integrated circuit modules U1
Source electrode also with field-effect tube Q1 is electrically connected；The drain electrode of field-effect tube Q1 is electrically connected with circuit output volume ground terminal, field-effect tube
The grid of Q1 is electrically connected with the pin 3 of integrated circuit modules U1；One end of resistance R4 is electrically connected with the pin 2 into circuit module U1
Connect, the other end of resistance R4 is electrically connected with the ground terminal of circuit output, resistance R5 be serially connected with the pin 5 of integrated circuit modules U1 with
Between ground terminal, resistance R6 is serially connected between the pin 4 of integrated circuit modules U1 and ground terminal；The circuit input anode and electricity
Road output cathode electrical connection.
The model XZ4313B of the integrated circuit modules U1.
The field-effect tube Q1 be positive-negative-positive field-effect tube, model XZ2106.
The beneficial effects of the utility model：This over-pressed, current foldback circuit provided by the utility model, certainly product input
Overtension and the excessive automatic protection functions technical problem of load current can automatically adjust voltage, the electric current of load input,
It avoids because voltage, electric current do not meet the power reguirements of load, and load is caused to damage, have that circuit is simple and reliable, cost performance
The advantages of high.
The utility model is described in further details below with reference to attached drawing.
Description of the drawings
Fig. 1 is overvoltage, current foldback circuit schematic diagram.
Specific embodiment
The technological means and effect reached predetermined purpose for the utility model is expanded on further and taken, below in conjunction with attached drawing
And embodiment, to specific embodiment of the present utility model, structure feature and its effect, detailed description are as follows.
Embodiment 1
The utility model provides a kind of overvoltage as shown in Figure 1, current foldback circuit, including resistance R1, resistance R2, electricity
Hinder R3, resistance R4, resistance R5, resistance R6, integrated circuit modules U1, field-effect tube Q1, zener diode D1, the resistance R1's
One end is electrically connected with the pin 6 of integrated circuit modules U1, and the other end of resistance R1 is electrically connected with circuit input anode；Two pole of voltage stabilizing
The cathode of pipe D1 is electrically connected with the pin 6 of integrated circuit modules U1, and the anode of zener diode D1 is electrically connected with ground terminal；It is described
One end of resistance R2 is electrically connected with the pin 1 of integrated circuit modules U1, and the other end of resistance R2 is electrically connected with circuit output anode；
One end of the resistance R3 is electrically connected with the pin 1 of integrated circuit modules U1, the other end and integrated circuit die of the resistance R3
The pin 2 of block U1 is electrically connected, meanwhile, the pin 2 of integrated circuit modules U1 is electrically connected with ground terminal, the pipe of integrated circuit modules U1
Source electrode of the foot 2 also with field-effect tube Q1 is electrically connected；The drain electrode of field-effect tube Q1 is electrically connected with circuit output volume ground terminal, field-effect
The grid of pipe Q1 is electrically connected with the pin 3 of integrated circuit modules U1；One end of resistance R4 is electrically connected with the pin 2 into circuit module U1
Connect, the other end of resistance R4 is electrically connected with the ground terminal of circuit output, resistance R5 be serially connected with the pin 5 of integrated circuit modules U1 with
Between ground terminal, resistance R6 is serially connected between the pin 4 of integrated circuit modules U1 and ground terminal；The circuit input anode and electricity
Road output cathode electrical connection.
The model XZ4313B of the integrated circuit modules U1 has the characteristics that reliable and stable, cost-effective.
The field-effect tube Q1 is positive-negative-positive field-effect tube, and model XZ2106 has reliable and stable, cost-effective spy
Point.
In conclusion the overvoltage, current foldback circuit, certainly product input voltage is excessively high and the excessive automatic guarantor of load current
Protective function technical problem can automatically adjust voltage, the electric current of load input, avoid because voltage, electric current do not meet load
Power reguirements, and load is caused to damage, have the advantages that circuit is simple and reliable, cost-effective.
The above content is combine specific preferred embodiment further detailed description of the utility model, it is impossible to
Assert that the specific implementation of the utility model is confined to these explanations.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, several simple deduction or replace can also be made, should all be regarded
To belong to the scope of protection of the utility model.
Claims (3)
1. a kind of overvoltage, current foldback circuit, it is characterised in that：Including resistance R1, resistance R2, resistance R3, resistance R4, resistance
R5, resistance R6, integrated circuit modules U1, field-effect tube Q1, zener diode D1, one end of the resistance R1 and integrated circuit die
The pin 6 of block U1 is electrically connected, and the other end of resistance R1 is electrically connected with circuit input anode；The cathode of zener diode D1 is with integrating
The pin 6 of circuit module U1 is electrically connected, and the anode of zener diode D1 is electrically connected with ground terminal；One end of the resistance R2 and collection
Pin 1 into circuit module U1 is electrically connected, and the other end of resistance R2 is electrically connected with circuit output anode；One end of the resistance R3
It is electrically connected with the pin 1 of integrated circuit modules U1, the other end of the resistance R3 is electrically connected with the pin 2 of integrated circuit modules U1
It connects, meanwhile, the pin 2 of integrated circuit modules U1 is electrically connected with ground terminal, and the pin 2 of integrated circuit modules U1 is gone back and field-effect tube
The source electrode electrical connection of Q1；The drain electrode of field-effect tube Q1 is electrically connected with circuit output volume ground terminal, the grid and collection of field-effect tube Q1
Pin 3 into circuit module U1 is electrically connected；One end of resistance R4 is electrically connected with the pin 2 into circuit module U1, and resistance R4's is another
One end is electrically connected with the ground terminal of circuit output, and resistance R5 is serially connected between the pin 5 of integrated circuit modules U1 and ground terminal, electricity
Resistance R6 is serially connected between the pin 4 of integrated circuit modules U1 and ground terminal；The circuit input anode and circuit output anode electricity
Connection.
2. a kind of overvoltage as described in claim 1, current foldback circuit, it is characterised in that：The integrated circuit modules U1's
Model XZ4313B.
3. a kind of overvoltage as described in claim 1, current foldback circuit, it is characterised in that：The field-effect tube Q1 is positive-negative-positive
Field-effect tube, model XZ2106.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721804442.7U CN207603205U (en) | 2017-12-21 | 2017-12-21 | A kind of overvoltage, current foldback circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721804442.7U CN207603205U (en) | 2017-12-21 | 2017-12-21 | A kind of overvoltage, current foldback circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207603205U true CN207603205U (en) | 2018-07-10 |
Family
ID=62767642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721804442.7U Expired - Fee Related CN207603205U (en) | 2017-12-21 | 2017-12-21 | A kind of overvoltage, current foldback circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207603205U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115308A (en) * | 2018-09-26 | 2019-01-01 | 惠州华阳通用电子有限公司 | A kind of vehicle fuel quantity detection device and method |
-
2017
- 2017-12-21 CN CN201721804442.7U patent/CN207603205U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115308A (en) * | 2018-09-26 | 2019-01-01 | 惠州华阳通用电子有限公司 | A kind of vehicle fuel quantity detection device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180710 Termination date: 20181221 |