CN205791515U - Novel DC inserts reverse-connection preventing circuit - Google Patents
Novel DC inserts reverse-connection preventing circuit Download PDFInfo
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- CN205791515U CN205791515U CN201620612243.5U CN201620612243U CN205791515U CN 205791515 U CN205791515 U CN 205791515U CN 201620612243 U CN201620612243 U CN 201620612243U CN 205791515 U CN205791515 U CN 205791515U
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Abstract
The utility model discloses a kind of novel DC and insert reverse-connection preventing circuit, insert including DC, the positive wire that is connected of positive pole pin that institute DC inserts and the cathode conductor that the negative pin inserted with DC is connected, it is additionally provided with reverse-connection preventing circuit, described reverse-connection preventing circuit includes the first resistance, the second resistance and metal-oxide-semiconductor, the positive pole pin that the drain electrode of described metal-oxide-semiconductor is inserted with DC is connected, the source electrode of described metal-oxide-semiconductor is connected with positive wire, the grid of described metal-oxide-semiconductor is connected on the negative pin that DC inserts by the second resistance, and described first resistance is connected between the drain electrode of metal-oxide-semiconductor and grid.Simple in construction of the present utility model, uses metal-oxide-semiconductor to substituted for traditional unilateral diode, solves the technical deficiency easily generating heat and causing certain power consumption during conventional art DC inserts because using unilateral diode, and stability in use is good and the suitability is strong.
Description
Technical field
This utility model relates to DC plug-in road technique field, inserts reverse-connection preventing circuit particularly to a kind of novel DC.
Background technology
There is many products on the market and outside DC input can be provided, be inserted as interiors of products by DC and power, though outside having much
Put Switching Power Supply or the both positive and negative polarity connection that DC inserts fixed by external transformator, but also by there is the company that DC plug forms with chuck line
Wiring, is product powered operation for external cell, therefore exists and both positive and negative polarity is connect anti-probability, and that this connects that anti-DC inserts is positive and negative
Pole may burn out interiors of products circuit, therefore can there is certain hidden danger.
It is that the positive pole inserted at DC inputs or increases a diode in negative pole input that conventional DC inserts reverse-connection preventing circuit, when
Outside DC inserts both positive and negative polarity and connects inverse time, due to the one direction conduction of diode, thus without to interiors of products line powering, as attached
Shown in Fig. 1 and lower Fig. 2.
Inserting anti-reverse method for above 2 kinds of DC, the DC of product to be considered inserts maximum supply current and selects diode D1
Specification, simultaneously because diode D1 is connected in work branch, there is certain pressure drop in diode D1, and the direct body of this pressure drop
Now in the power supply of product, say, that the voltage difference between VCC and GND is unable to reach DC and inserts the voltage of outside input.
Simultaneously because diode D1 by supply current and to there is certain voltage poor, therefore diode D1 is by certain for generation
Caloric value, causes certain power consumption to product.And along with required electric current is the biggest, the requirement to diode D1 is the highest.
Utility model content
In order to solve above-mentioned technical problem, main purpose of the present utility model is to provide a kind of simple in construction, uses and stablize
Property good novel DC insert reverse-connection preventing circuit, it is intended to solve easily generate heat because using unilateral diode and make during conventional art DC inserts
Become the technical deficiency of certain power consumption.
The utility model proposes a kind of novel DC and insert reverse-connection preventing circuit, the positive pole pin that, institute DC slotting including DC inserts is connected
Positive wire and the cathode conductor that is connected of negative pin inserted with DC, be additionally provided with reverse-connection preventing circuit, described reverse-connection preventing circuit
Including the first resistance, the second resistance and metal-oxide-semiconductor, the positive pole pin that the drain electrode of described metal-oxide-semiconductor is inserted with DC is connected, described metal-oxide-semiconductor
Source electrode be connected with positive wire, the grid of described metal-oxide-semiconductor by the second resistance be connected to DC insert negative pin on, described
First resistance is connected between the drain electrode of metal-oxide-semiconductor and grid.
Described metal-oxide-semiconductor is p-type metal-oxide-semiconductor.
Simple in construction of the present utility model, uses metal-oxide-semiconductor to substituted for traditional unilateral diode, solves conventional art DC
Easily generating heat because using unilateral diode in Chaing and cause the technical deficiency of certain power consumption, stability in use is good and the suitability
By force.
Accompanying drawing explanation
Fig. 1 is the first slotting for DC circuit diagram of prior art；
Fig. 2 is the second circuit diagram slotting for DC of prior art；
Fig. 3 is embodiment schematic diagram of the present utility model.
The realization of this utility model purpose, functional characteristics and advantage will in conjunction with the embodiments, are described further referring to the drawings.
Detailed description of the invention
Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this
Utility model.
With reference to Fig. 3, an embodiment of the present utility model is proposed,
A kind of novel DC inserts reverse-connection preventing circuit, inserts 1 including DC, institute DC inserts the positive wire VCC that the positive pole pin of 1 is connected
And the cathode conductor GND that the negative pin of 1 is connected is inserted with DC, and it being additionally provided with reverse-connection preventing circuit 2, described reverse-connection preventing circuit 2 includes
First resistance R1, the second resistance R2 and metal-oxide-semiconductor Q1, the drain electrode of described metal-oxide-semiconductor Q1 is inserted the positive pole pin of 1 and is connected with DC, described
The source electrode of metal-oxide-semiconductor Q1 is connected with positive wire VCC, and the grid of described metal-oxide-semiconductor Q1 is connected to DC by the second resistance R2 and inserts 1
On negative pin, described first resistance R1 is connected between drain electrode and the grid of metal-oxide-semiconductor Q1.
Described metal-oxide-semiconductor is p-type metal-oxide-semiconductor.
Specific works principle is: when outside DC patch is correct, the dividing potential drop branch road of resistance R1 and resistance R2 makes p-type
The voltage of the grid G ultimate ratio source electrode D pole of metal-oxide-semiconductor is low, i.e. VGD is negative, turns on, due to resistance R1 between drain D pole and source S pole
Configuring with R2 dividing potential drop, make VSG voltage relatively big, therefore VSD voltage difference is the least, and between VCC and GND, voltage difference is close to outside input
Voltage.
When outside DC patch mistake, i.e. DC grafting inverse time, owing to the dividing potential drop branch road of resistance R1 Yu resistance R2 makes p-type
The voltage of the grid G ultimate ratio source electrode D pole of metal-oxide-semiconductor is high, i.e. VGD is just, ends between drain D pole and source S pole.
In this circuit, after turning on due to p-type metal-oxide-semiconductor, VSD voltage difference is the least, and therefore between VCC and GND, voltage difference is close
External input voltage.
In this circuit, after turning on due to p-type metal-oxide-semiconductor, VSD voltage difference is the least, and the power consumption that therefore this circuit is consumed is very
Low.
In this circuit, heat produced by p-type metal-oxide-semiconductor can relatively conventional circuit relatively low.
In this circuit, along with required electric current is the highest, less demanding to integrated circuit, and shared by cost-saved and circuit
Area.
Simple in construction of the present utility model, uses metal-oxide-semiconductor to substituted for traditional unilateral diode, solves conventional art DC
Easily generating heat because using unilateral diode in Chaing and cause the technical deficiency of certain power consumption, stability in use is good and the suitability
By force.
The foregoing is only preferred embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model,
Every equivalent structure transformation utilizing this utility model description and accompanying drawing content to be made, or directly or indirectly it is used in other phases
The technical field closed, is the most in like manner included in scope of patent protection of the present utility model.
Claims (2)
1. novel DC inserts a reverse-connection preventing circuit, inserts including DC, the positive wire that is connected of positive pole pin that institute DC inserts and and DC
The cathode conductor that is connected of negative pin inserted, it is characterised in that: being additionally provided with reverse-connection preventing circuit, described reverse-connection preventing circuit includes the
One resistance, the second resistance and metal-oxide-semiconductor, the positive pole pin that the drain electrode of described metal-oxide-semiconductor is inserted with DC is connected, the source electrode of described metal-oxide-semiconductor
Being connected with positive wire, the grid of described metal-oxide-semiconductor is connected on the negative pin that DC inserts by the second resistance, described first electricity
Resistance is connected between the drain electrode of metal-oxide-semiconductor and grid.
Novel DC the most according to claim 1 inserts reverse-connection preventing circuit, it is characterised in that: described metal-oxide-semiconductor is p-type metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620612243.5U CN205791515U (en) | 2016-06-21 | 2016-06-21 | Novel DC inserts reverse-connection preventing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620612243.5U CN205791515U (en) | 2016-06-21 | 2016-06-21 | Novel DC inserts reverse-connection preventing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205791515U true CN205791515U (en) | 2016-12-07 |
Family
ID=58132427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620612243.5U Active CN205791515U (en) | 2016-06-21 | 2016-06-21 | Novel DC inserts reverse-connection preventing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205791515U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169663A (en) * | 2017-12-28 | 2018-06-15 | 湖南国科微电子股份有限公司 | A kind of pcb board with fool proof debugging interface |
| CN108879648A (en) * | 2017-05-15 | 2018-11-23 | 华为技术有限公司 | A kind of power protecting circuit |
-
2016
- 2016-06-21 CN CN201620612243.5U patent/CN205791515U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879648A (en) * | 2017-05-15 | 2018-11-23 | 华为技术有限公司 | A kind of power protecting circuit |
| CN108169663A (en) * | 2017-12-28 | 2018-06-15 | 湖南国科微电子股份有限公司 | A kind of pcb board with fool proof debugging interface |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |