CN104052029A - Charger reverse-connection-prevention circuit and electronic device - Google Patents
Charger reverse-connection-prevention circuit and electronic device Download PDFInfo
- Publication number
- CN104052029A CN104052029A CN201310082787.6A CN201310082787A CN104052029A CN 104052029 A CN104052029 A CN 104052029A CN 201310082787 A CN201310082787 A CN 201310082787A CN 104052029 A CN104052029 A CN 104052029A
- Authority
- CN
- China
- Prior art keywords
- resistance
- triode
- circuit
- controllable silicon
- reverse
- 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
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The embodiment of the invention discloses a charger reverse-connection-prevention circuit comprising a triode Q1, a silicon controlled rectifier Q2, a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4. The emitter of the triode Q1 is connected with the anode of a voltage input end and is connected with one end of the third resistor R3. The base electrode of the triode Q1 is respectively connected with the other end of the third resistor R3 and one end of the fourth resistor R4. The collector of the triode Q1 is respectively connected with the one end of the first resistor R1. The embodiment of the invention also discloses an electronic device. By adopting the circuit and the device, the power consumption of the circuit can be effectively reduced.
Description
Technical field
The present invention relates to field of power supplies, relate in particular to a kind of charger reverse-connection preventing circuit and electronic equipment.
Background technology
Reversal connection refers to that power supply adaptor both positive and negative polarity connects anti-situation, the way that generally prevents reversal connection is in circuit, to add diode, utilize diode unilateal conduction characteristic and suppress flowing through of reverse current, but while adopting in this way, on diode, have the loss of pressure drop, this loss meeting increases along with the increase of electric current, in the larger circuit of electric current, likely can cause circuit in under-voltage situation because pressure drop is too large.
In prior art, generally DC power supply input reverse connection prevention protection circuit is to utilize the unilateral conduction of diode to realize anti-reverse protection, and this connection is simple and reliable, but power consumption impact is very large in the situation of the large electric current of input.With input current rated value, reach 2A, choosing rated pipe pressure drop is 0.7V diode, and power consumption at least also will reach 2A * 0.7V=1.4W so, and this reversal connection circuit efficiency is low, and power consumption is large.Can also to input, do rectification with diode bridge in addition, circuit just has correct polarity forever like this.The shortcoming of these schemes is, the pressure drop meeting consumed energy on diode, and when the tube voltage drop that is 2A and the diode chosen at input current rated value is 0.7V, power consumption is 2 * 2A * 0.7V=2.8W, exists equally the excessive problem of power consumption.
Therefore, existing reverse-connection preventing circuit exists that pressure drop is large, loss is large and the inefficient problem of circuit.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of charger reverse-connection preventing circuit and electronic equipment are provided.Can solve reverse-connection preventing circuit in prior art and have that pressure drop is large, loss large and the inefficient problem of circuit.
In order to solve the problems of the technologies described above, the embodiment of the present invention provides a kind of charger reverse-connection preventing circuit, comprising:
Comprise triode Q1, controllable silicon Q2, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and the 4th resistance R 4, wherein,
The emitter of described triode Q1 is connected with the positive pole of voltage input end, and the emitter of this triode Q1 is connected with one end of described the 3rd resistance R 3;
The base stage of described triode Q1 is connected with one end of described the 4th resistance R 4 with the other end of described the 3rd resistance R 3 respectively;
The collector electrode of described triode Q1 is connected with one end of described the first resistance R 1;
The control utmost point of described controllable silicon Q2 is connected with one end of described the second resistance R 2 with the other end of described the first resistance R 1 respectively;
The K utmost point of described controllable silicon Q2 is connected with described second other end of resistance R 2 and the negative pole of voltage input end respectively;
The A utmost point of described controllable silicon Q2 is connected with the earth with the other end of described the 4th resistance R 4 respectively;
The positive pole of voltage output end is connected with the positive pole of voltage input end, the minus earth of described voltage output end.
Wherein, also comprise a light-emitting diode D1, the negative electrode of described light-emitting diode D1 is connected with the emitter of described triode Q1, and the anode of this light-emitting diode D1 is connected with the positive pole of described voltage input end.
Wherein, described controllable silicon Q2 is bidirectional triode thyristor.
Wherein, described triode Q1 is MOS metal oxide semiconductor field effect tube.
Wherein, the resistance of described the first resistance R 1 and the second resistance R 2 equates.
Wherein, described controllable silicon Q2 is with a metal fin, and the gap between this controllable silicon and metal fin is used thermal grease to fill.
Correspondingly, the embodiment of the present invention also provides a kind of electronic equipment, comprises above-mentioned reverse-connection preventing circuit.
Wherein, the components and parts of described reverse-connection preventing circuit are fixed on separately on a wiring board.
Wherein, the surface of the components and parts of described reverse-connection preventing circuit is coated with the anti-paint of one deck three.
Implement the embodiment of the present invention, there is following beneficial effect:
Implement embodiments of the invention; utilize cut-off and the conducting function of triode; make battery Non voltage output when reversal connection of voltage output end; thereby protected the damage of battery; improved the useful life of battery; meanwhile, solved pressure drop and the excessive problem of power consumption that the anti-reverse scheme of existing employing diode power source exists.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the circuit diagram of a kind of charger reverse-connection preventing circuit of the embodiment of the present invention;
Fig. 2 is the assembling schematic diagram of a kind of charger reverse-connection preventing circuit of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Referring to Fig. 1, be the circuit diagram (hereinafter to be referred as reverse-connection preventing circuit) of a kind of charger reverse-connection preventing circuit of the embodiment of the present invention, this reverse-connection preventing circuit comprises:
Triode Q1, controllable silicon Q2, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and the 4th resistance R 4, the annexation of above-mentioned components and parts is: the emitter of triode Q1 is connected with one end of the 3rd resistance R 3 with the positive pole of voltage input end respectively, preferably, triode Q1 is MOS(Metal-Oxide-Semiconductor Field-Effect Transistor, mos field effect transistor, be called for short MOS) pipe, because the conducting internal resistance of metal-oxide-semiconductor is extremely low, loss is minimum, has greatly improved the efficiency of circuit.The base stage of triode Q1 is connected with one end of the 4th resistance R 4 with the other end of the 3rd resistance R 3 respectively, and the collector electrode of triode Q1 is connected with one end of the first resistance R 1; The control utmost point of controllable silicon Q2 is connected with one end of the second resistance R 2 with the other end of the first resistance R 1 respectively, the A utmost point of controllable silicon Q2 is connected with the earth with the other end of the 4th resistance R 4 respectively, the K utmost point of controllable silicon Q2 is connected with second other end of resistance R 2 and the negative pole of voltage input end respectively, the positive pole of voltage output end is connected with the positive pole of voltage input end, and the negative pole of voltage output end is connected with the earth.In embodiments of the present invention, the voltage of voltage input end input is direct voltage, voltage output end is connected with battery, and the direct voltage of voltage input end input arrives these battery two ends by this reverse-connection preventing circuit by voltage-drop loading, causes the damage of battery to prevent the both positive and negative polarity reversal connection of battery.
Further, this reverse-connection preventing circuit also comprises a light-emitting diode D1, and whether the both positive and negative polarity that is used to indicate load connection error, and the negative electrode of this light-emitting diode D1 is connected with the emitter of triode Q1, and its anode is connected with the positive pole of voltage input end.
The operation principle of this reverse-connection preventing circuit is: when the voltage output end of circuit is unloaded, the base biasing resistor of triode Q1 (the 3rd resistance R 3 of the biasing resistor in figure and the 4th resistance R 4) is not because having loop to make triode Q1 for by state, controllable silicon Q2 also controls the utmost point because of it does not have current trigger for cut-off state, the voltage output end of this circuit disconnects and Non voltage output, and light-emitting diode D1 is not luminous.
When battery reversal connection, the emitter reverse biased of triode Q1 makes it for cut-off state, and same controllable silicon is also for cut-off state, and voltage output end is exported Non voltage output, and light-emitting diode D1 is not luminous.
When voltage output end connects when correct, the emitter forward of triode Q1 makes its conducting state, voltage through collector electrode, the first resistance R 1 and the second resistance R 2 of triode Q1 to ground, the dividing potential drop of the first resistance R 1 and the second resistance R 2 makes controlled silicon conducting, preferably, the resistance of the first resistance R 1 and the second resistance R 2 equates.Like this, the negative pole of voltage input end and voltage output end is just communicated with by the A utmost point and the K utmost point of controllable silicon Q2, and voltage is normally exported, and light-emitting diode D1 is luminous simultaneously, thereby realizes anti-reverse function.Wherein, preferred, this controllable silicon Q2 is bidirectional triode thyristor.
Referring to Fig. 2, assembling schematic diagram for a kind of charger reverse-connection preventing circuit of the present invention, Fig. 2 comprises reverse-connection preventing circuit 1 and wiring board 2, independent being fixed on wiring board 2 of components and parts of reverse-connection preventing circuit 1, at the two ends of wiring board 2, draw 4 pins simultaneously, the left side be 2 voltage input pins, the position Voltage-output pin on the right.The controllable silicon Q2 of reverse-connection preventing circuit 1 is with a metal fin; gap between the two is used thermal grease to fill; can effectively the unnecessary dissipation of heat of controllable silicon be gone out like this; prevent components and parts excess Temperature and lost efficacy; improved the reliability of circuit, the components and parts of this reverse-connection preventing circuit show to be coated with the anti-paint of one deck three simultaneously, and protection circuit plate and relevant device thereof are avoided the erosion of environment; thereby improve and extend their useful life, guarantee the safety and reliability using.
Implement embodiments of the invention; utilize cut-off and the conducting function of triode; make battery Non voltage output when reversal connection of voltage output end; thereby protected the damage of battery; improved the useful life of battery; meanwhile, solved pressure drop and the excessive problem of power consumption that the anti-reverse scheme of existing employing diode power source exists.
Above disclosed is only a kind of preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, one of ordinary skill in the art will appreciate that all or part of flow process that realizes above-described embodiment, and the equivalent variations of doing according to the claims in the present invention, still belong to the scope that invention is contained.
Claims (9)
1. a charger reverse-connection preventing circuit, is characterized in that, comprises triode Q1, controllable silicon Q2, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and the 4th resistance R 4, wherein,
The emitter of described triode Q1 is connected with the positive pole of voltage input end, and the emitter of this triode Q1 is connected with one end of described the 3rd resistance R 3;
Described triode Q1 base stage is connected with one end of described the 4th resistance R 4 with the other end of described the 3rd resistance R 3 respectively;
The collector electrode of described triode Q1 is connected with one end of described the first resistance R 1;
The control utmost point of described controllable silicon Q2 is connected with one end of described the second resistance R 2 with the other end of described the first resistance R 1 respectively;
The K utmost point of described controllable silicon Q2 is connected with described second other end of resistance R 2 and the negative pole of voltage input end respectively;
The A utmost point of described controllable silicon Q2 is connected with ground wire with the other end of described the 4th resistance R 4 respectively;
The positive pole of voltage output end is connected with the positive pole of voltage input end, the minus earth of described voltage output end.
2. circuit as claimed in claim 1, is characterized in that, also comprises a light-emitting diode D1, and the negative electrode of described light-emitting diode D1 is connected with the emitter of described triode Q1, and the anode of this light-emitting diode D1 is connected with the positive pole of described voltage input end.
3. circuit as claimed in claim 2, is characterized in that, described controllable silicon Q2 is bidirectional triode thyristor.
4. the circuit as described in claim 1-3 any one, is characterized in that, described triode Q1 is MOS metal oxide semiconductor field effect tube.
5. circuit as claimed in claim 4, is characterized in that, the resistance of described the first resistance R 1 and the second resistance R 2 equates.
6. circuit as claimed in claim 5, is characterized in that, described controllable silicon Q2 is with a metal fin, and the gap between this controllable silicon and metal fin is used thermal grease to fill.
7. an electronic equipment, is characterized in that, comprises the reverse-connection preventing circuit described in claim 1-6 any one.
8. electronic equipment as claimed in claim 7, is characterized in that, the components and parts of described reverse-connection preventing circuit are fixed on separately on a wiring board.
9. electronic equipment as claimed in claim 8, is characterized in that, the surface of the components and parts of described reverse-connection preventing circuit is coated with the anti-paint of one deck three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310082787.6A CN104052029A (en) | 2013-03-15 | 2013-03-15 | Charger reverse-connection-prevention circuit and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310082787.6A CN104052029A (en) | 2013-03-15 | 2013-03-15 | Charger reverse-connection-prevention circuit and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104052029A true CN104052029A (en) | 2014-09-17 |
Family
ID=51504565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310082787.6A Pending CN104052029A (en) | 2013-03-15 | 2013-03-15 | Charger reverse-connection-prevention circuit and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104052029A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6423723A (en) * | 1987-07-18 | 1989-01-26 | Mitsubishi Electric Corp | Erroneous wiring preventer |
| CN201226367Y (en) * | 2008-06-30 | 2009-04-22 | 李荣显 | Apparatus for repairing battery capacity |
| CN201349141Y (en) * | 2009-01-21 | 2009-11-18 | 葛淇聪 | Safe device for output of electric motor car charger |
| CN102185364A (en) * | 2011-05-17 | 2011-09-14 | 李秉哲 | Electric vehicle storage battery charger with multiple protection functions |
| CN202474833U (en) * | 2012-03-26 | 2012-10-03 | 缪仙福 | Output short-circuit protective circuit for battery charger |
-
2013
- 2013-03-15 CN CN201310082787.6A patent/CN104052029A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6423723A (en) * | 1987-07-18 | 1989-01-26 | Mitsubishi Electric Corp | Erroneous wiring preventer |
| CN201226367Y (en) * | 2008-06-30 | 2009-04-22 | 李荣显 | Apparatus for repairing battery capacity |
| CN201349141Y (en) * | 2009-01-21 | 2009-11-18 | 葛淇聪 | Safe device for output of electric motor car charger |
| CN102185364A (en) * | 2011-05-17 | 2011-09-14 | 李秉哲 | Electric vehicle storage battery charger with multiple protection functions |
| CN202474833U (en) * | 2012-03-26 | 2012-10-03 | 缪仙福 | Output short-circuit protective circuit for battery charger |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2836301Y (en) | Reverse connection prevention circuit for power supply | |
| CN202513543U (en) | Overcurrent protection circuit | |
| WO2013107320A1 (en) | Surge protection circuit | |
| CN107528298B (en) | Protection circuit of electronic load and electronic load | |
| CN203180783U (en) | Boosted circuit | |
| US7800249B1 (en) | Power supply system | |
| JP2024041854A (en) | Reverse connection failure preventing circuit | |
| CN205304240U (en) | Control circuit is prevented joining conversely by high -power direct current | |
| CN104052029A (en) | Charger reverse-connection-prevention circuit and electronic device | |
| CN202094845U (en) | Device for managing power supply | |
| CN105578645A (en) | Over-current protection method of LED driving power supply | |
| CN105515357B (en) | A kind of DCDC current-limiting circuits | |
| CN211508615U (en) | Power supply reverse connection prevention protection circuit | |
| CN206060723U (en) | Communicating circuit between AGV circuit boards | |
| CN202977969U (en) | Efficient protection circuit of laser coupling power source | |
| CN204538698U (en) | Cell management system of electric automobile has the protective circuit of reverse power connection function | |
| CN202759272U (en) | Current limiting circuit for anti-explosion battery | |
| CN207743687U (en) | A kind of accessory power supply with defencive function | |
| CN204424869U (en) | A kind of hiccup protections circuit and apply the photovoltaic generating system of this circuit | |
| CN206640342U (en) | A kind of signal control boot-strap circuit of low-power consumption | |
| CN206353708U (en) | A kind of binary channels electric supply installation and electronic equipment | |
| CN115333053B (en) | Auxiliary circuit and electronic equipment | |
| CN216215869U (en) | DC power supply reverse connection protection circuit | |
| CN221202152U (en) | High-voltage high-power direct-current double-circuit reverse connection prevention control circuit | |
| CN103052212A (en) | Over-current protection light emitting diode (LED) lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140917 |