CN108695838A - A kind of power supply or signal transmission plug-in unit - Google Patents

A kind of power supply or signal transmission plug-in unit Download PDF

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Publication number
CN108695838A
CN108695838A CN201810478134.2A CN201810478134A CN108695838A CN 108695838 A CN108695838 A CN 108695838A CN 201810478134 A CN201810478134 A CN 201810478134A CN 108695838 A CN108695838 A CN 108695838A
Authority
CN
China
Prior art keywords
triode
power supply
signal transmission
ground
trombone slide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810478134.2A
Other languages
Chinese (zh)
Inventor
向玲丽
张波
袁涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201810478134.2A priority Critical patent/CN108695838A/en
Publication of CN108695838A publication Critical patent/CN108695838A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/002Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02Details
    • H02H3/04Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/042Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned combined with means for locating the fault
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • H02H3/202Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • H02H3/22Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage of short duration, e.g. lightning
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/005Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions

Abstract

A kind of power supply or signal transmission plug-in unit, connection include the triode of connection between the first end and a second end between the first end and a second end, and the collector of the triode connects first end, and emitter connects second end;It is connected with current-limiting resistance between base stage and collector, capacitance is connected between the base stage and ground of the triode;Lower trombone slide is connected between the transistor base and ground, the control terminal of the lower trombone slide is connect with control circuit;The control circuit includes the divider resistance string being connected between second end and ground, and the intermediate node connection drop-down pipe control terminal of the divider resistance string, the control circuit further includes concatenated zener diode and light emitting diode.Using power supply of the present invention or signal transmission plug-in unit, discrete device is used to design completely, it is of low cost, it is simple in structure;It can realize Anti-surging, antistatic, anti-reverse and both-end over-voltage protecting function, the internal circuit connected to port and port realizes effective protection.

Description

A kind of power supply or signal transmission plug-in unit
Technical field
The invention belongs to electronic technology field, it is related to a kind of power supply or signal transmission plug-in unit.
Background technology
The physical port of communication and electronic equipment is the channel that data are transmitted exchange or power input output, is electronics Equipment or chip circuit and the extraneous channel for carrying out signal and power supply and exchanging, to prevent port from being destroyed in use, Various protection circuits are generally all connected at port;In the prior art, protecting circuit designed has a single function, using operation The expensive chip controls cost such as amplifier, ADC even microcontroller is higher, and circuit design is also more complex.
Invention content
To overcome defect of the existing technology, the invention discloses a kind of power supply or signal transmission plug-in units.
Power supply of the present invention or signal transmission plug-in unit, connection between the first end and a second end, including are connected to first The collector of triode between end and second end, the triode connects first end, and emitter connects second end;Base stage sum aggregate It is connected with current-limiting resistance between electrode, capacitance is connected between the base stage and ground of the triode;
Lower trombone slide is connected between the transistor base and ground, the control terminal of the lower trombone slide is connect with control circuit;It is described Control circuit includes the divider resistance string being connected between second end and ground, the intermediate node connection drop-down of the divider resistance string Pipe control terminal, the control circuit further include concatenated zener diode and light emitting diode, the zener diode it is positive and negative Pole is separately connected first end and light emitting diode anode, and light emitting diode cathode connects the control terminal of the lower trombone slide, under described Trombone slide is NPN pipes or NMOS tube.
Preferably, the capacitance is also parallel with reset resistor.
Preferably, the triode is managed for NPN.
Using power supply of the present invention or signal transmission plug-in unit, discrete device is used to design completely, of low cost, structure letter It is single;It can realize Anti-surging, antistatic, anti-reverse and both-end over-voltage protecting function, the internal circuit connected to port and port Realize effective protection.
Description of the drawings
Fig. 1 is a kind of electrical block diagram of specific implementation mode of the present invention.
Reference numeral is entitled in figure:P1- first ends, P2- second ends, R1- current-limiting resistances, the first divider resistances of R2-, The second divider resistances of R3-, R4- reset resistors, T- triodes, trombone slide under N-, D1- zener diodes, D2- light emitting diodes, C- Capacitance.
Specific implementation mode
The specific implementation mode of the present invention is described in further detail below.
As shown in Figure 1, power supply of the present invention or signal transmission plug-in unit, connect between the first end and a second end, including The collector of the triode of connection between the first end and a second end, the triode connects first end, emitter connection second End;It is connected with current-limiting resistance between base stage and collector, capacitance is connected between the base stage and ground of the triode;
Lower trombone slide is connected between the transistor base and ground, the control terminal of the lower trombone slide is connect with control circuit;It is described Control circuit includes the divider resistance string being connected between second end and ground, the intermediate node connection drop-down of the divider resistance string Pipe control terminal, the control circuit further include concatenated zener diode and light emitting diode, the zener diode it is positive and negative Pole is separately connected first end and light emitting diode anode, and light emitting diode cathode connects the control terminal of the lower trombone slide, under described Trombone slide is NPN pipes or NMOS tube.
The present invention is input to applied to external signal at signal or power interface in internal electronic equipment, and first end is usual For external signal input terminals or external power input, second end is usually signal receiving end or power end, connects internal circuit Signal end is powered for internal circuit.
Have counnter attack connection function when plug-in unit of the present invention is as power interface, by taking specific implementation mode shown in Fig. 1 as an example, First end P1 connections positive input under normal circumstances, the NPN pipe forward conductions of diode connection;When first end P1 misconnections When cathode, second end is generally zero potential, and transistor base voltage is less than emitter voltage at this time, and triode is not turned on, to Reversal connection is avoided to connect internal circuit.
The plug-in unit is also equipped with Surge suppression function, and transistor base connect second by the positive PN junction between collector P2 is held, and second end P2 is zero by pull down resistor string current potential normal condition, transistor base maintains low level, as first end P1 When connection anode, it is necessary first to charge to capacitance C, charging current is limited by current-limiting resistance R1, and capacitance voltage slowly rises, just Stage beginning transistor base voltage is less than turn-on threshold voltage, and triode is not turned on, with the rising of capacitance voltage, triode by It is progressive enter amplification region and conducting state.Capacitance can a reset resistor in parallel, which can accelerate base stage electricity when power-off Pressure zero, and divided with current-limiting resistance to adjust base voltage dc point.
It is also equipped with over-voltage suppression function in second end, may be surge voltage in the overpressure situation of second end, it is also possible to Input voltage is excessively high to be caused, and the second terminal voltage is divided and controlled by the resistance string that the first divider resistance and the second divider resistance form The lower trombone slide of system adjusts the pressure point of crossing of the ratio control second end of two divider resistances, such as it is 1 that lower trombone slide, which opens saturation voltage, Volt, the first divider resistance and the second partial pressure resistance ratio 9:1, then when the second terminal voltage is higher than 10V, lower trombone slide is opened, NPN pipes Base voltage is pulled low, and NPN pipes are closed, and to close surge voltage source and input voltage to the channel of output voltage, are reached The rapid purpose for dragging down the second terminal voltage.Two divider resistance resistance values are answered larger, are reduced the power consumption on partial pressure branch road, can be seen Go out, which also has surge voltage further preventive effect.In the present invention, pull down resistor string be also equipped with for First end over-voltage protecting function provides the function of diode drop-down ground connection;In addition pull down resistor series winding be connected on second end and ground wire it Between, elimination effect is also functioned to for the electrostatic of second end, second end can not possibly accumulate electrostatic, electrostatic damage will not occur.Drop-down The faster NPN pipes of opening speed preferably may be used in pipe.
The present invention also has overvoltage protection and warning function in first end, due to first end opposite second end more often in contact with Forward voltage, misconnection high pressure probability higher;When first end misconnection high pressure, zener diode is breakdown, and light emitting diode forward direction is logical Cross the second divider resistance earth-continuity, luminous alarm while LEDs ON.
Light emitting diode is connected between drop-down pipe control terminal and zener diode anode, has also been isolated from pull down resistor string To the forward conduction channel between zener diode, the second terminal voltage is avoided to have an impact first end.In addition zener diode, Light emitting diode and the second divider resistance are connected between first end and ground wire, and also functioning to elimination for the electrostatic of first end makees With first end can not possibly accumulate electrostatic, and electrostatic damage will not occur.
Using power supply of the present invention or signal transmission plug-in unit, discrete device is used to design completely, of low cost, structure letter It is single;It can realize Anti-surging, antistatic, anti-reverse and both-end over-voltage protecting function, the internal circuit connected to port and port Realize effective protection.
Previously described each preferred embodiment for the present invention, if the preferred embodiment in each preferred embodiment It is not apparent contradictory or premised on a certain preferred embodiment, each preferred embodiment can arbitrary stack combinations Use, the design parameter in the embodiment and embodiment merely to clearly state the invention verification process of inventor, and It is non-to limit the scope of patent protection of the present invention, scope of patent protection of the invention is still subject to its claims, all It is equivalent structure variation made by the description with the present invention, similarly should be included within the scope of the present invention.

Claims (3)

1. a kind of power supply or signal transmission plug-in unit, connection is between the first end and a second end, it is characterised in that:Including being connected to The collector of triode between one end and second end, the triode connects first end, and emitter connects second end;Base stage and It is connected with current-limiting resistance between collector, capacitance is connected between the base stage and ground of the triode;
Lower trombone slide is connected between the transistor base and ground, the control terminal of the lower trombone slide is connect with control circuit;It is described Control circuit includes the divider resistance string being connected between second end and ground, the intermediate node connection drop-down of the divider resistance string Pipe control terminal, the control circuit further include concatenated zener diode and light emitting diode, the zener diode it is positive and negative Pole is separately connected first end and light emitting diode anode, and light emitting diode cathode connects the control terminal of the lower trombone slide, under described Trombone slide is NPN pipes or NMOS tube.
2. power supply as described in claim 1 or signal transmission plug-in unit, which is characterized in that the capacitance is also parallel with reset electricity Resistance.
3. power supply as described in claim 1 or signal transmission plug-in unit, which is characterized in that the triode is managed for NPN.
CN201810478134.2A 2018-05-18 2018-05-18 A kind of power supply or signal transmission plug-in unit Pending CN108695838A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810478134.2A CN108695838A (en) 2018-05-18 2018-05-18 A kind of power supply or signal transmission plug-in unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810478134.2A CN108695838A (en) 2018-05-18 2018-05-18 A kind of power supply or signal transmission plug-in unit

Publications (1)

Publication Number Publication Date
CN108695838A true CN108695838A (en) 2018-10-23

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ID=63847697

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810478134.2A Pending CN108695838A (en) 2018-05-18 2018-05-18 A kind of power supply or signal transmission plug-in unit

Country Status (1)

Country Link
CN (1) CN108695838A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112510993A (en) * 2019-09-16 2021-03-16 奇源科技有限公司 High voltage stabilizer

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202167843U (en) * 2011-06-21 2012-03-14 威海东兴电子有限公司 Power supply output overvoltage protective circuit used for LED liquid crystal display television
JP2013121203A (en) * 2011-12-06 2013-06-17 Nippon Antenna Co Ltd Surge voltage protection circuit
CN203193495U (en) * 2013-03-05 2013-09-11 杨远敏 Double-end protection type voltage stabilization power source
CN103904619A (en) * 2012-12-27 2014-07-02 北京谊安医疗系统股份有限公司 Switch DC-DC power output overvoltage protection circuit
CN204205549U (en) * 2014-09-02 2015-03-11 上海斐讯数据通信技术有限公司 Overvoltage protection
CN205046975U (en) * 2015-09-21 2016-02-24 重庆宁来科贸有限公司 Alarm of taking self -checking that can automatic plastic
WO2016060541A1 (en) * 2014-10-15 2016-04-21 O.Y.L. Technology Sdn Bhd Overvoltage protection
CN206321697U (en) * 2016-11-30 2017-07-11 广州视源电子科技股份有限公司 A kind of over-voltage detection circuit and switching power circuit

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202167843U (en) * 2011-06-21 2012-03-14 威海东兴电子有限公司 Power supply output overvoltage protective circuit used for LED liquid crystal display television
JP2013121203A (en) * 2011-12-06 2013-06-17 Nippon Antenna Co Ltd Surge voltage protection circuit
CN103904619A (en) * 2012-12-27 2014-07-02 北京谊安医疗系统股份有限公司 Switch DC-DC power output overvoltage protection circuit
CN203193495U (en) * 2013-03-05 2013-09-11 杨远敏 Double-end protection type voltage stabilization power source
CN204205549U (en) * 2014-09-02 2015-03-11 上海斐讯数据通信技术有限公司 Overvoltage protection
WO2016060541A1 (en) * 2014-10-15 2016-04-21 O.Y.L. Technology Sdn Bhd Overvoltage protection
CN205046975U (en) * 2015-09-21 2016-02-24 重庆宁来科贸有限公司 Alarm of taking self -checking that can automatic plastic
CN206321697U (en) * 2016-11-30 2017-07-11 广州视源电子科技股份有限公司 A kind of over-voltage detection circuit and switching power circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112510993A (en) * 2019-09-16 2021-03-16 奇源科技有限公司 High voltage stabilizer

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Application publication date: 20181023