CN201904618U

CN201904618U - Circuit structure capable of connecting polarities of input power positively and reversely

Info

Publication number: CN201904618U
Application number: CN2010205952408U
Authority: CN
Inventors: 贾祥友
Original assignee: Asia Vital Components Co Ltd
Current assignee: Asia Vital Components Co Ltd
Priority date: 2010-10-18
Filing date: 2010-10-18
Publication date: 2011-07-20
Anticipated expiration: 2020-10-18
Also published as: DE202010016430U1; TWM399535U

Abstract

The utility model relates to a circuit structure capable of connecting the polarities of an input power positively and reversely, which comprises a load, an input power part, a protection unit, a first switch unit and a second switch unit; the protection unit is respectively coupled with the first electrode end and the second electrode end of the input power part and one end of the load; the first switch unit is respectively coupled with the first and the second electrode ends and the protection unit; the conduction or non-conduction of the first switch unit is chosen according to the polarities of the first and the second electrode ends; the second switch unit is respectively coupled with the first and the second electrode ends, the first switch unit and the protection unit; the conduction or non-conduction of the second switch unit is chosen according to the polarities of the first and the second electrode ends; the other end of the load is respectively coupled with the first switch unit and the second switch unit; therefore, by the circuit structure design of the utility model, the effect of efficiently driving the load to work when the input power is positively or reversely connected is achieved.

Description

The input electric power polarity is the circuit structure of reversal connection just

Technical field

The utility model is the circuit structure of importing electric power polarity can positive reversal connection about a kind of, relates in particular to a kind ofly with saving time and easy-to-use, and then can effectively reach the circuit structure that the input electric power polarity of the effect that positive reversal connection all can work can positive reversal connection.

Background technology

The electric mode of advancing of general DC power supply is that the positive and negative end of input power supply is according to its pre-determined route and advance, when if the positive and negative polarity of described input power supply is misplaced unintentionally or because of carelessness, can cause the internal circuit of load to damage, burn as electronic building brick, so in order to solve the above problems, present most of circuit structure for fear of the positive and negative polarity wrong of input power supply, then is provided with one or several diodes and prevents in practical application between the internal circuit of positive and negative end and load.

So when the positive and negative polarity of importing power supply is correct, making the electric current of the input power supply diode of flowing through is forward bias voltage drop and conducting, then allow the internal circuit of the described load of described current direction, to order about described loaded work piece, when being misplaced as if the positive and negative polarity of importing power supply this moment, making the electric current of the input power supply diode of flowing through is reverse biased and not conducting, then do not allow the internal circuit of described current direction to load, this moment open circuit, so load can't be worked, make to reach the purpose that the internal circuit of avoiding load is damaged.

Yet; on the circuit structure positive-negative polarity wrong that described diode prevents to import power supply is set at present; and then protection load internal circuit; but extend another problem; promptly when just importing power supply; when negative polarity is misplaced; because of the pass of open circuit is; make not conducting of load and can't work; just establishing the input power supply so must connect again; after negative polarity is correct; could allow the load conducting and start working, therefore, making needs plug repeatedly to confirm whether polarity is correct when establishing the input power supply connecing; bring in the use outside the suitable inconvenience causing, and expend time in again.

The above, have following shortcoming in the existing technologies:

1. when the positive and negative polarity reversal connection of input power supply, load can't work on;

2. convenience is not good;

3. expend time in.

Therefore, how to solve the problem and the disappearance of above-mentioned existence, be inventor of the present utility model and be engaged in the relevant manufacturer of the industry and do one's utmost to study the direction place of improvement.

The utility model content

For effectively addressing the above problem, main purpose of the present utility model is to provide a kind of circuit structure that has the input electric power polarity that reaches the effect that the positive reversal connection of input power supply all can work can positive reversal connection.

Main purpose of the present utility model is to provide a kind of just circuit structure of reversal connection of easy-to-use and time saving input electric power polarity that has.

For achieving the above object, the utility model provides a kind of just circuit structure of reversal connection of electric power polarity of importing, and comprises a load; An input power supply unit has one first electrode tip and one second electrode tip; A protected location is an end that couples described first and second electrode tip and described load respectively; One first switch element is to couple described first and second electrode tip and protected location respectively, and selects conducting or not conducting according to the polarity of described first and second electrode tip; And a second switch unit then couples described first and second electrode tip, first switch element and protected location respectively, and select conducting or not conducting according to the polarity of described first and second electrode tip, and the other end of described load then couples with described first switch element and second switch unit respectively mutually; So see through the design that the structure of first and second switch element of the present utility model and protected location combines; make not only have save time, the effect of easy-to-use and polarity protection, and then can effectively reach the effect that the positive reversal connection of input power supply all can be ordered about loaded work piece again.

Description of drawings

Fig. 1 is the block schematic diagram of the preferable enforcement of the utility model;

Fig. 2 is a circuit diagram of the utility model preferred embodiment;

Fig. 3 is another circuit diagram of the utility model preferred embodiment.

[primary clustering symbol description]

Load ... 1 second end ... R1b

Led module ... 10 second resistance ... R2

Front end ... 10a the 3rd end ... R2a

Rear end ... 10b the 4th end ... R2b

Input power supply unit ... 2 the first transistors ... Q1

First electrode tip ... 2a first utmost point ... Q1a

Second electrode tip ... 2b second utmost point ... Q1b

Protected location ... 3 the 3rd utmost points ... Q1c

First switch element ... 4 the 3rd resistance ... R3

Second switch unit ... 5 five terminals ... R3a

Light-emitting diode ... LED the 6th end ... R3b

First diode ... D1 the 4th resistance ... R4

First anode end ... D1a the 7th end ... R4a

First cathode terminal ... D1b the 8th end ... R4b

Second diode ... D2 transistor seconds ... Q2

Second plate end ... D2a the 4th utmost point ... Q2a

Second cathode terminal ... D2b the 5th utmost point ... Q2b

First resistance ... R1 sextupole ... Q2c

First end ... R1a earth terminal ... GND

Embodiment

Characteristic on above-mentioned purpose of the present utility model and structure thereof and the function will be according to institute's accompanying drawing examples of implementation with explanation.

As shown in Figure 1; the utility model is a kind of just circuit structure of reversal connection of electric power polarity of importing; comprise a load 1; an input power supply unit 2; a protected location 3; one first switch element 4 and a second switch unit 5; wherein said input power supply unit 2 is in order to provide the input power supply to the circuit structure that connects; and input power supply unit 2 has one first electrode tip 2a and one second electrode tip 2b; the described first electrode tip 2a is the described second electrode tip 2b of coupling; when also even the first electrode tip 2a is anodal; then the second electrode tip 2b is a negative pole; when if the first electrode tip 2a is negative pole, then the second electrode tip 2b is anodal.

Described protected location 3 is to couple first and second electrode tip 2a, the 2b of described input power supply unit 2 and an end of load 1 respectively, and in order to prevent to import first and second electrode tip 2a, the 2b error-polarity connection of power supply unit 2, effectively to avoid load 1 to be damaged, in brief, that is protected location 3 have the function of polarity protection; The other end of described load 1 couples mutually with described first switch element 4 and second switch unit 5 respectively.

Described first switch element 4 couples described first and

second electrode tip

2a, 2b and protected location 3 respectively, and select conducting or not conducting according to the polarity of the first electrode tip 2a and the second electrode tip 2b, the first electrode tip 2a that also even described first switch element 4 couples respectively is a negative pole for anodal and the second electrode tip 2b, then described first switch element 4 can't be triggered and be not on-state, makes input power supply unit 2 can't constitute the loop with load 1; If being negative pole and the described second electrode tip 2b, the first electrode tip 2a that described first switch element 4 couples respectively is positive pole, then described first switch element 4 is triggered and is conducting state, make described input power supply unit 2 and load 1 constitute the loop, and then order about load 1 work.

Described second switch unit 5 is to couple described first and

second electrode tip

2a, 2b, first switch element 4 and protected location 3 respectively, and select conducting or not conducting according to the polarity of the described first electrode tip 2a and the second electrode tip 2b, also even the first electrode tip 2a that couples respectively of second switch unit 5 is a negative pole for anodal and the second electrode tip 2b, then described second switch unit 5 is triggered and is conducting state, make described input power supply unit 2 and load 1 constitute the loop, and then order about load 1 work; Be positive pole if the first electrode tip 2a that second switch unit 5 couples respectively is the negative pole and the second electrode tip 2b, then described second switch unit 5 can't be triggered and be not on-state, makes input power supply unit 2 can't constitute the loop with load 1.

So see through described

first switch element

4 and 5 conductings in turn of second switch unit, make no matter the first electrode tip 2a and the second electrode tip 2b of described input power supply unit 2 are negative or positive electrode, all can order about described load 1 work, therefore, the design of the utility model circuit structure, make effectively to reach easy-to-use and save time, and then effectively realize the effect that the positive reversal connection of input power supply all can be ordered about load 1 work again.

Shown in Fig. 2,3, put up with each structure and describe in detail:

Described protected location 3 comprises one first diode D1 and one second diode D2; the described first diode D1 has a first anode end D1a and one first cathode terminal D1b; described first anode end D1a is the first electrode tip 2a that selects to couple described input power supply unit 2; the described second diode D2 has a second plate end D2a and one second cathode terminal D2b; described second plate end D2a then selects to couple the described second electrode tip 2b, and the described second cathode terminal D2b is an end that couples described first cathode terminal D1b and load 1 respectively.

Described load 1 is as LED (Light Emitting Diode, LED) module, electronic product, carry electronic installation ... etc., described enforcement is done explanation with led module 10, described led module 10 has the plural LED that is in series, and having a front end 10a is to be coupled to an earth terminal GND (other end that is load 1 is coupled to earth terminal GND), and Shu rear end 10b couples (end that is load 1 couples described first and second cathode terminal D1b, D2b) mutually with described first and second cathode terminal D1b, D2b.

Described first switch element 4 comprises one first resistance R 1, second resistance R 2 and one first crystal, and described first resistance R 1 has one first end R1a and one second end R1b, and the described first end R1a is coupled to the second electrode tip 2b of input power supply unit 2; Described second resistance R 2 has one the 3rd end R2a and couples the described second end R1b, reach one the 4th end R2b and couple described earth terminal GND, that is first resistance R 1 is in series with second resistance R 2.

Described the first transistor Q1 is a two-carrier transistor (BJT) or a field-effect transistor (FET-MOSFET, JFET), and have one first utmost point Q1a and one second utmost point Q1b and one the 3rd utmost point Q1c, described first utmost point Q1a couples described first electrode tip 2a and described first anode end D1a respectively, described second utmost point Q1b couples described the 4th end R2b and earth terminal GND respectively, described the 3rd utmost point Q1c couples described second end R1b and described the 3rd end R2a joint, so coupling the described first electrode tip 2a as first utmost point Q1a is negative pole, when the described first end R1a couples the described second electrode tip 2b for positive pole, make described the first transistor Q1 triggering and conducting, then make input power supply unit 2 and load 1 constitute the loop, just order about load 1 work then.

Concrete enforcement, the user can be in advance according to the demand of integrated circuit structure to switch control, select to design described the first transistor Q1 and be two-carrier transistor (BJT) or field-effect transistor (FET-MOSFET, JFET); That is, show that as Fig. 2 the first transistor Q1 is chosen as two-carrier transistor (BJT), described first utmost point Q1a is the collection utmost point, and second utmost point Q1b is an emitter-base bandgap grading, the 3rd utmost point Q1c is a base stage, or, as Fig. 3 show the first transistor Q1 be chosen as field-effect transistor (FET-MOSFET, JFET), described first utmost point Q1a is a drain, second utmost point Q1b is a source electrode, and the 3rd utmost point Q1c is a gate, and wherein above-mentioned field-effect transistor is to do explanation with n type MOS (metal-oxide-semiconductor) transistor (NMOSFET).

Described second switch unit 5 comprises one the 3rd resistance R 3, one four resistance R 4 and a transistor seconds Q2, described the 3rd resistance R 3 has the five terminal R3a and one the 6th end R3b that couple the described first electrode tip 2a, the 4th resistance R 4 has one the 7th end R4a and couples described the 6th end R3b, reach one the 8th end R4b and couple described earth terminal GND, that is the 3rd resistance R 3 is in series with the 4th resistance R 4.

Described transistor seconds Q2 has one the 4th utmost point Q2a, one the 5th utmost point Q2b and a sextupole Q2c, described the 4th utmost point Q2a couples described second electrode tip 2b and second plate end D2a respectively, described the 5th utmost point Q2b couples described the 8th end R4b and second utmost point Q1b and earth terminal GND respectively, described sextupole Q2c couples described the 6th end R3b and the 7th end R4a joint, so when described five terminal R3a couples the described first electrode tip 2a for anodal, described the 4th utmost point Q2a couples the described second electrode tip 2b when being negative pole, make described transistor seconds Q2 triggering and conducting, make input power supply unit 2 and load 1 constitute the loop then, just order about load 1 work at last.

Concrete enforcement, described transistor seconds Q2 is roughly identical with the first transistor Q1, all can select designing institute to state transistor seconds Q2 is two-carrier transistor (BJT) or field-effect transistor (FET-MOSFET, JFET), described transistor seconds Q2 is coupling the first transistor Q1, that is show first as Fig. 2, two-transistor Q1, Q2 is chosen as two-carrier transistor (BJT), described first, four utmost point Q1a, Q2a is the collection utmost point, second, five utmost point Q1b, Q2b is an emitter-base bandgap grading, the 3rd, sextupole Q1c, Q2c is a base stage, or, show first as Fig. 3, two-transistor Q1, Q2 be chosen as field-effect transistor (FET-MOSFET, JFET), described first, four utmost point Q1a, Q2a is a drain, second, five utmost point Q1b, Q2b is a source electrode, the 3rd, sextupole Q1c, Q2c is a gate, and wherein above-mentioned field-effect transistor is to do explanation with n type MOS (metal-oxide-semiconductor) transistor (NMOSFET).

As shown in Figure 2, below will be for embodiment explanation, in this embodiment first and second transistor Q1, Q2 do explanation with two-carrier transistor (BJT):

So if described circuit structure couples the first electrode tip 2a of input power supply unit 2 when being negative pole for anodal and the second electrode tip 2b, make electric current by the first electrode tip 2a, the first diode D1 that flows through, the described LED that waits, and the 3rd resistance R 3 of flowing through simultaneously and the 4th resistance R 4, then the 3rd resistance R 3 and the 4th resistance R 4 are divided the sextupole Q2c that is depressed into described transistor seconds Q2, after making transistor seconds Q2 triggering and conducting, the electric current transistor seconds Q2 that continues to flow through then, earth terminal GND to the second electrode tip 2b and constitute described loop, the last described LED that waits sends light source;

If described circuit structure couples the first electrode tip 2a of input power supply unit 2 is negative pole and the second electrode tip 2b when anodal, make electric current by the second electrode tip 2b, the second diode D2 that flows through, the described LED that waits, and first resistance R 1 of flowing through simultaneously and second resistance R 2, then first resistance R 1 and second resistance R were depressed into the 3rd utmost point Q1c of described the first transistor Q1 in 2 minutes, after making the first transistor Q1 triggering and conducting, the electric current the first transistor Q1 that continues to flow through then, earth terminal GND to the first electrode tip 2a and constitute described loop, the last described LED that waits sends light source, therefore, see through this and create the design of this circuit structure, can effectively realize importing the positive reversal connection of power supply and all can order about the effect of load 1 work, and then effectively reach easy-to-use again and save time.

The above, the utility model compared with prior art has following advantage:

1. have and reach the effect that the positive reversal connection of input power supply all can be ordered about loaded work piece;

2. convenience is good;

3. save time.

The above is the preferable feasible embodiment of the utility model, and the variation that utilizes the above-mentioned method of the utility model, shape, structure, device to do such as all should be contained in the interest field of utility model.

Claims

1. import the just circuit structure of reversal connection of electric power polarity for one kind, it is characterized in that, comprising:

A load;

An input power supply unit has one first electrode tip and one second electrode tip;

A protected location couples an end of described first and second electrode tip and described load respectively;

One first switch element is to couple described first and second electrode tip and protected location respectively, and selects conducting or not conducting according to the polarity of described first and second electrode tip; And second switch unit; be to couple described first and second electrode tip, first switch element and protected location respectively; and select conducting or not conducting according to the polarity of described first and second electrode tip, and the other end of described load then couples with described first switch element and second switch unit respectively mutually.

2. input electric power polarity as claimed in claim 1 is the circuit structure of reversal connection just; it is characterized in that; comprise: described protected location comprises one first diode and one second diode; described first diode has a first anode end and one first cathode terminal; described first anode end is to select to couple described first electrode tip; described second diode has a second plate end; reach the end that one second cathode terminal couples described first cathode terminal and load respectively, described second plate end is to select to couple described second electrode tip.

3. input electric power polarity as claimed in claim 2 is the circuit structure of reversal connection just, it is characterized in that comprise: described first switch element comprises:

One first resistance has one first end and one second end, and described first end is coupled to second electrode tip of described input power supply unit;

One second resistance, having one the 3rd end is to couple described second end, and one the 4th end couples an earth terminal;

A first transistor, have one first utmost point and one second utmost point and one the 3rd utmost point, described first utmost point couples described first electrode tip and described first anode end respectively, described second utmost point couples described the 4th end and earth terminal respectively, and described the 3rd utmost point couples described second end and described the 3rd end joint;

It is negative pole that wherein said first utmost point couples described first electrode tip, when described first end couples described second electrode tip for positive pole, makes described the first transistor triggering and conducting.

4. input electric power polarity as claimed in claim 3 is the circuit structure of reversal connection just, it is characterized in that comprise: described second switch unit comprises:

One the 3rd resistance has a five terminal and one the 6th end that couples described first electrode tip;

One the 4th resistance has one the 7th end and couples described the 6th end, and one the 8th end couples described earth terminal;

A transistor seconds, have one the 4th utmost point, the 5th utmost point and a sextupole, described the 4th utmost point couples described second electrode tip and second plate end respectively, and described the 5th utmost point couples described the 8th end and second utmost point respectively, and described sextupole couples described the 6th end and the 7th end joint;

Wherein said five terminal couples described first electrode tip for anodal, and described the 4th utmost point couples described second electrode tip when being negative pole, makes described transistor seconds triggering and conducting.

5. input electric power polarity as claimed in claim 2 is the circuit structure of reversal connection just, it is characterized in that, comprise: described load is to be a led module, described led module has the plural light-emitting diode that is in series, and have a front end and be coupled to an earth terminal, and a rear end couples mutually with described first and second cathode terminal.

6. input electric power polarity as claimed in claim 3 can positive reversal connection circuit structure, it is characterized in that comprise: described the first transistor is to be a two-carrier transistor, and described first very collects the utmost point, described second emitter-base bandgap grading very, the described the 3rd base stage very.

7. input electric power polarity as claimed in claim 4 can positive reversal connection circuit structure, it is characterized in that comprise: described transistor seconds is to be a two-carrier transistor, and the described the 4th very collects the utmost point, the described the 5th emitter-base bandgap grading very, described sextupole is a base stage.

8. input electric power polarity as claimed in claim 3 can positive reversal connection circuit structure, it is characterized in that comprise: described the first transistor is to be a field-effect transistor, described first drain very, described second source electrode very, the described the 3rd gate very.

9. input electric power polarity as claimed in claim 4 can positive reversal connection circuit structure, it is characterized in that comprise: described transistor seconds is to be a field-effect transistor, the described the 4th drain very, the described the 5th source electrode very, described sextupole is a gate.