CN205509491U - DC power supply prevents reverse -connection protective circuit - Google Patents
DC power supply prevents reverse -connection protective circuit Download PDFInfo
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- CN205509491U CN205509491U CN201620145070.0U CN201620145070U CN205509491U CN 205509491 U CN205509491 U CN 205509491U CN 201620145070 U CN201620145070 U CN 201620145070U CN 205509491 U CN205509491 U CN 205509491U
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Abstract
The utility model provides a DC power supply prevents reverse -connection protective circuit, does it include terminal I (VIN+), II (VIN of terminal ), III (VOUT+) of terminal, IV (VOUT of terminal ), resistance (R1), electric capacity (C1), diode (D1), stabilivolt (VZ1) and NMOS pipe (Q10), I (VIN+) of terminal connects DC power supply's output positive terminal, II (VIN of terminal )Connect DC power supply's output negative pole and hold, terminal III (VOUT+) connected load's positive input terminal, IV (VOUT of terminal ) connected load's negative pole input. The utility model discloses played between DC power supply and load and prevented joining conversely the guard action, NMOS pipe pressure drop and consumption when switching on is minimum, has solved the DC power supply prevents reverse -connection protective circuit among the prior art and has had the defect that the consumption is big.
Description
Technical field
This utility model is related to protection of circuit, particularly relates to a kind of preventing reverse connection for DC power source protection circuit.
Background technology
It is known that, DC source is the power supply of polarized, power supply one end that it is exported is positive pole, the other end is negative pole, using the power input of the load of DC source corresponding therewith to connect, instead cannot normally work if connect, light then circuit can not form loop, heavy then power supply and load equipment are caused damage, even burn, so must correctly access when accessing DC source.In order to prevent misconnection, people have employed reverse connection prevention protection circuit.Under normal circumstances, do DC supply input reverse connection prevention protection circuit be the unilateal conduction characteristic utilizing diode to realize anti-reverse protection, although but this method shortcoming with low cost is also apparent from, it is simply that power consumption is the biggest.Such as, if input current rated value reaches 2A, and the pressure drop of diode is 0.7V, then power consumption the most also has 1.4W, and such caloric value is too big, and efficiency is the lowest.Also have a kind of diode bridge be also often be used to do anti-reverse, but the power consumption of this protection circuit power consumption in the case of selecting diode of the same race goes up a kind of twice especially.
In sum, preventing reverse connection for DC power source protection circuit of the prior art also exists the defect that power consumption is big.
Utility model content
Problem to be solved in the utility model is to overcome the deficiencies in the prior art, it is provided that the preventing reverse connection for DC power source protection circuit that a kind of power consumption is little.
nullThe technical solution of the utility model is: this utility model it include terminal I、Terminal II、Terminal III、Terminal IV、Resistance、Electric capacity、Diode、Stabilivolt and NMOS tube，Described terminal I is connected with described terminal III and is connected the positive pole of described diode，The negative pole of described diode connects one end of described resistance，The other end of described resistance connects grid and the negative pole of described stabilivolt of described NMOS tube，The positive pole of described stabilivolt connects the drain electrode of described NMOS tube、One end of described electric capacity and described terminal IV，The source electrode of described NMOS tube connects the other end and the described terminal III of described electric capacity，Described terminal I connects the output cathode end of DC source，Described terminal II connects the output negative pole end of DC source，Described terminal III connects the electrode input end of load，Described terminal IV connects the negative input of load.
nullThe beneficial effects of the utility model are: due to this utility model, it includes terminal I、Terminal II、Terminal III、Terminal IV、Resistance、Electric capacity、Diode、Stabilivolt and NMOS tube，Described terminal I is connected with described terminal III and is connected the positive pole of described diode，The negative pole of described diode connects one end of described resistance，The other end of described resistance connects grid and the negative pole of described stabilivolt of described NMOS tube，The positive pole of described stabilivolt connects the drain electrode of described NMOS tube、One end of described electric capacity and described terminal IV，The source electrode of described NMOS tube connects the other end and the described terminal III of described electric capacity，Described terminal I connects the output cathode end of DC source，Described terminal II connects the output negative pole end of DC source，Described terminal III connects the electrode input end of load，Described terminal IV connects the negative input of load.So this utility model serves anti-reverse protective effect between DC source and load, described NMOS is pressure drop and micro power consumption when conducting, solves preventing reverse connection for DC power source protection circuit of the prior art and there is the defect that power consumption is big.
Accompanying drawing explanation
Fig. 1 is circuit theory schematic diagram of the present utility model.
Detailed description of the invention
nullAs shown in Figure 1，This utility model it include terminal I VIN+、Terminal II VIN-、Terminal III VOUT+、Terminal IV VOUT-、Resistance R1、Electric capacity C1、Diode D1、Stabilivolt VZ1 and NMOS tube Q10，Described terminal I VIN+ is connected with described terminal III VOUT+ and is connected the positive pole of described diode D1，The negative pole of described diode D1 connects one end of described resistance R1，The other end of described resistance R1 connects grid and the negative pole of described stabilivolt VZ1 of described NMOS tube Q10，The positive pole of described stabilivolt VZ1 connects the drain electrode of described NMOS tube Q10、One end of described electric capacity C1 and described terminal IV VOUT-，The source electrode of described NMOS tube Q10 connects the other end and described terminal III VOUT+ of described electric capacity C1，Described terminal I VIN+ connects the output cathode end of DC source，Described terminal II VIN-connects the output negative pole end of DC source，Described terminal III VOUT+ connects the electrode input end of load，Described terminal IV VOUT-connects the negative input of load.
Designed by the present embodiment is a kind of NMOS tube anti-reverse protection electricity, and its principle: when NMOS tube just connects, the anti-reverse diode current flow of D1, circuit provides Vgs voltage, NMOS tube saturation conduction；During NMOS tube reversal connection, NMOS tube can not turn on, so playing anti-reverse effect.
The present embodiment technical essential: NMOS tube is connected on the negative pole of power supply, grid high level turns on；The effect of VZ1 Zener diode is that gate source voltage is too high punctures NMOS tube in order to prevent；The effect of C1 electric capacity is the spike in order to produce when eliminating conducting；The effect of D1 diode is the Rds(ON in order to prevent secondary damage (can not connect) IRF3205) only 8m Ω, under 2A electric current, power consumption only has 0.032W.So this utility model serves anti-reverse protective effect between DC source and load, described NMOS tube is pressure drop and micro power consumption when conducting, solves preventing reverse connection for DC power source protection circuit of the prior art and there is the defect that power consumption is big.This utility model can be widely applied in preventing reverse connection for DC power source protection field.
Claims (1)
- null1. a preventing reverse connection for DC power source protection circuit，It is characterized in that: it includes terminal I (VIN+)、Terminal II (VIN-)、Terminal III (VOUT+)、Terminal IV (VOUT-)、Resistance (R1)、Electric capacity (C1)、Diode (D1)、Stabilivolt (VZ1) and NMOS tube (Q10)，Described terminal I (VIN+) is connected with described terminal III (VOUT+) and is connected the positive pole of described diode (D1)，The negative pole of described diode (D1) connects one end of described resistance (R1)，The other end of described resistance (R1) connects grid and the negative pole of described stabilivolt (VZ1) of described NMOS tube (Q10)，The positive pole of described stabilivolt (VZ1) connects the drain electrode of described NMOS tube (Q10)、One end of described electric capacity (C1) and described terminal IV (VOUT-)，The source electrode of described NMOS tube (Q10) connects the other end and the described terminal III (VOUT+) of described electric capacity (C1)，Described terminal I (VIN+) connects the output cathode end of DC source，Described terminal II (VIN-) connects the output negative pole end of DC source，Described terminal III (VOUT+) connects the electrode input end of load，Described terminal IV (VOUT-) connects the negative input of load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620145070.0U CN205509491U (en) | 2016-02-26 | 2016-02-26 | DC power supply prevents reverse -connection protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620145070.0U CN205509491U (en) | 2016-02-26 | 2016-02-26 | DC power supply prevents reverse -connection protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205509491U true CN205509491U (en) | 2016-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620145070.0U Expired - Fee Related CN205509491U (en) | 2016-02-26 | 2016-02-26 | DC power supply prevents reverse -connection protective circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN205509491U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992501A (en) * | 2017-04-19 | 2017-07-28 | 赛尔富电子有限公司 | The dc source and its LED lamp and control system of a kind of anti-output false power supply |
| CN107017613A (en) * | 2017-06-07 | 2017-08-04 | 上海乐野网络科技有限公司 | It is a kind of to prevent the circuit of reverse power connection |
| CN109176523A (en) * | 2018-09-29 | 2019-01-11 | 苏州博众机器人有限公司 | A kind of control circuit, circuit board and robot |
| CN111106824A (en) * | 2019-12-17 | 2020-05-05 | 精进电动科技股份有限公司 | Anti-reverse circuit of bridge driving circuit |
-
2016
- 2016-02-26 CN CN201620145070.0U patent/CN205509491U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992501A (en) * | 2017-04-19 | 2017-07-28 | 赛尔富电子有限公司 | The dc source and its LED lamp and control system of a kind of anti-output false power supply |
| CN107017613A (en) * | 2017-06-07 | 2017-08-04 | 上海乐野网络科技有限公司 | It is a kind of to prevent the circuit of reverse power connection |
| CN109176523A (en) * | 2018-09-29 | 2019-01-11 | 苏州博众机器人有限公司 | A kind of control circuit, circuit board and robot |
| CN109176523B (en) * | 2018-09-29 | 2021-05-18 | 苏州博众机器人有限公司 | Control circuit, circuit board and robot |
| CN111106824A (en) * | 2019-12-17 | 2020-05-05 | 精进电动科技股份有限公司 | Anti-reverse circuit of bridge driving circuit |
| CN111106824B (en) * | 2019-12-17 | 2023-11-03 | 精进电动科技股份有限公司 | Anti-reverse circuit of bridge driving circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |