CN103683264A - Circuit for preventing reverse plug in of direct current power supply and lamp - Google Patents
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Abstract
The invention relates to the field of reverse plug in prevention of power supplies and discloses a circuit for preventing reverse plug in of a direct current power supply and a lamp. The circuit for preventing reverse plug in of the direct current power supply is provided with a relay, a diode, a first switch tube and a second switch tube, when a positive electrode input end of a signal end of the direct current power supply receives a negative voltage signal and a negative electrode input end of the signal end of the direct current power supply receives a positive voltage signal, the diode is cut off, a switch of the relay is turned off to cut off the first switch tube and the second switch tube, so that a first output end and a second output end of the circuit for preventing reverse plug in of the direct current power supply do not have any voltage signal inputted to a load, as a result, the purposes of reverse plug in prevention and protection are fulfilled. The circuit provided by the invention is simple in structure, high in stability and relatively low in power consumption, and the property of the reverse plug in prevention circuit is improved.
Description
Technical field
The present invention relates to power supply reverse connection protection field, relate in particular to a kind of anti-reverse connection circuit of direct current power supply and light fixture.
Background technology
In using the electronic equipment of external power supply, if the power supply of electronic equipment connects instead, can cause the permanent damage of electronic equipment.
Present circuit for preventing reverse connection of power supply adopts diode, utilizes the one-way conduction characteristic of diode to reach the object that prevents reverse power connection damage electronic equipment.But, because the pressure drop of diode is fixed, cause the power of its consumption excessive, produce larger heat, circuit stability can be reduced, increased maintenance cost.
Summary of the invention
The invention provides a kind of anti-reverse connection circuit of direct current power supply and light fixture, solved prior art and by diode, realized circuit for preventing reverse connection of power supply and cause circuitry consumes power excessive, the problem that stability reduces.
The invention provides a kind of anti-reverse connection circuit of direct current power supply, be used for being connected between DC power signal end and a load, so that described load is carried out to anti-reverse protection, described anti-reverse connection circuit of direct current power supply comprises: diode, relay, the first switching tube and second switch pipe, the anode of described diode is connected to the electrode input end of described DC power signal end by the coil of described relay, the negative electrode of described diode is connected to the negative input of described DC power signal end, the first end of the switch of described relay is connected to the negative electrode of described diode, and be connected to the first end of described the first switching tube, the second end of the switch of described relay is connected to the control end of described second switch pipe, the first end of described second switch pipe is connected to the electrode input end of described DC power signal end, and as the first output of described anti-reverse connection circuit of direct current power supply, the control end of described the first switching tube is connected to the second end of described second switch, the second end of described the first switching tube is as the second output of described anti-reverse connection circuit of direct current power supply, first and second output of described anti-reverse connection circuit of direct current power supply is used for connecting described load, when the electrode input end of described DC power signal end receives negative voltage signal, when the negative input of described DC power signal end receives positive voltage signal, described diode cut-off, the switch of described relay disconnects, make described first and second switching tube cut-off, thereby first and second output that makes described anti-reverse connection circuit of direct current power supply does not have voltage signal to export described load to.
Wherein, when the electrode input end of described DC power signal end receives positive voltage signal, when the negative input of described DC power signal end receives negative voltage signal, described diode current flow, the switch of described relay is closed, make described first and second switching tube conducting, thereby make first and second output of described anti-reverse connection circuit of direct current power supply output voltage signal to described load.
Wherein, described anti-reverse connection circuit of direct current power supply also comprises the first resistance, the anode of the described diode electrode input end that coil and described the first resistance by described relay is connected to described d. c. voltage signal end successively.
Wherein, described anti-reverse connection circuit of direct current power supply also comprises the second resistance, and described the second resistance is connected between the control end and first end of described the first switching tube.
Wherein, described anti-reverse connection circuit of direct current power supply also comprises the 3rd and the 4th resistance, the second end of the switch of described relay is connected to the control end of described second switch pipe by described the 3rd resistance, described the 4th resistance is connected between the first end of described second switch pipe and the control end of described second switch pipe.
Wherein, described anti-reverse connection circuit of direct current power supply also comprises the 5th resistance, and the first end of described second switch pipe is connected to the electrode input end of described d. c. voltage signal end by described the 5th resistance.
Wherein, described the first switching tube is N channel field-effect pipe, the control end of described the first switching tube, first end and the second end are respectively grid, source electrode and the drain electrode of described field effect transistor, described second switch pipe is positive-negative-positive triode, and the control end of described second switch pipe, first end and the second end are respectively base stage, emitter and the collector electrode of described triode.
Wherein, described anti-reverse connection circuit of direct current power supply also comprises the 3rd switching tube, the 6th resistance and the 7th resistance, the second end of the switch of described relay is connected to the control end of described second switch pipe by described the 3rd switching tube, the the described the 6th and the 7th resistance is connected between the electrode input end of described DC power signal end and the second end of the switch of described relay, node between the described the 6th and the 7th resistance is connected to the control end of described the 3rd switching tube, the first end of described the 3rd switching tube is connected to the second end of the switch of described relay, the second end of described the 3rd switching tube is connected to the control end of described second switch pipe, when the electrode input end of described DC power signal end receives negative voltage signal, when the negative input of described DC power signal end receives positive voltage signal, described diode cut-off, the switch of described relay disconnects, make the described first to the 3rd switching tube cut-off, thereby first and second output that makes described anti-reverse connection circuit of direct current power supply does not have voltage signal to export described load to.
Wherein, described the first switching tube is N channel field-effect pipe, the control end of described the first switching tube, first end and the second end are respectively grid, source electrode and the drain electrode of described field effect transistor, described second switch pipe is positive-negative-positive triode, the control end of described second switch pipe, first end and the second end are respectively base stage, emitter and the collector electrode of described positive-negative-positive triode, described the 3rd switching tube is NPN type triode, and the control end of described the 3rd switching tube, first end and the second end are respectively base stage, emitter and the collector electrode of described NPN type triode.
The present invention also provides a kind of light fixture; comprise DC power signal end, light source load and above-mentioned anti-reverse connection circuit of direct current power supply; described anti-reverse connection circuit of direct current power supply is connected between described DC power signal end and described light source load, so that described light source load is carried out to anti-reverse protection.
In anti-reverse connection circuit of direct current power supply provided by the invention and light fixture, mainly by relay is set, diode, the first switching tube and second switch pipe, make to receive negative voltage signal when the electrode input end of described DC power signal end, when the negative input of described DC power signal end receives positive voltage signal, described diode cut-off, the switch of described relay disconnects, make described first and second switching tube cut-off, thereby first and second output that makes described anti-reverse connection circuit of direct current power supply does not have voltage signal to export described load to, reach anti-reverse object.Circuit structure provided by the invention is simple, and stability is high, and power consumption is less, has improved the performance of reverse-connection preventing circuit.
Accompanying drawing explanation
In order to be illustrated more clearly in the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment 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 a kind of anti-reverse connection circuit of direct current power supply structural representation that the embodiment of the present invention provides;
Fig. 2 is the another kind of anti-reverse connection circuit of direct current power supply structural representation that the embodiment of the present invention provides;
Fig. 3 is a kind of lamp circuit structural representation that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in 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.
The invention provides a kind of anti-reverse connection circuit of direct current power supply and light fixture, for reaching anti-reverse object, circuit structure is simple, and stability is high, and power consumption is less, has improved the performance of reverse-connection preventing circuit.
Below be elaborated respectively.
Refer to Fig. 1, a kind of anti-reverse connection circuit of direct current power supply structural representation that Fig. 1 provides for the embodiment of the present invention.As shown in Figure 1, the anti-reverse connection circuit of direct current power supply that the present embodiment provides, for being connected between DC power signal end and load, so that described load is carried out to anti-reverse protection.Described anti-reverse connection circuit of direct current power supply comprises: relay K, diode D, resistance R 1, switch element 110, resistance R 2 and the first switching tube Z.In the present embodiment, switch element 110 comprises that resistance R 3, resistance R 4, resistance R 5, second switch pipe are as triode Q, and wherein, the type of triode Q is positive-negative-positive triode.And, the type of the first switching tube Z is that N-type metal-oxide-semiconductor is example, the grid of N-type metal-oxide-semiconductor is the control end g of described the first switching tube Z, and the source electrode of N-type metal-oxide-semiconductor is the first end s of described the first switching tube Z, and the drain electrode of N-type metal-oxide-semiconductor is the second end l of described the first switching tube Z.
Wherein, resistance R 1 is connected to one end of the electrode input end L of described DC power signal end and the coil of relay K; The other end of the coil of relay K is connected to the anode of diode D, and the negative electrode of described diode D is connected to the first end of the first end 1 of the switch of described relay K, the negative input N of described DC power signal end and described the first switching tube Z.Resistance R 2 is connected between the collector electrode c of triode Q and the first end s of described the first switching tube Z, and the second end 2 of the switch of relay K is connected to one end of resistance R 3, and the other end of resistance R 3 is connected to the base stage b of triode Q.
Resistance R 4 is connected between the base stage b of triode Q and the emitter e of triode Q, and the first end of resistance R 5 is connected to the electrode input end L of described DC power signal end as the first output OUT1 of described anti-reverse connection circuit of direct current power supply.Between the second end of described resistance R 5 and the emitter e of triode Q, the collector electrode c of triode Q is connected to the control end g of the first switching tube Z.The second end of described the first switching tube Z is as the second output OUT2 of described anti-reverse connection circuit of direct current power supply.When the described DC power signal end of the normal access of DC power supply, the electrode input end that is described DC power signal end receives positive voltage signal, when the negative input of described DC power signal end receives negative voltage signal, diode D forward conduction, the coil of relay K makes the switch of relay K convert connection status to from off-state by electric current, make triode Q in conducting state, the voltage difference between the control end g of the first switching tube Z and the first end s of the first switching tube Z is ordered about the first switching tube Z conducting, between the first output OUT1 of described anti-reverse connection circuit of direct current power supply and the second output OUT2, there is voltage signal output.
When DC power supply oppositely accesses described d. c. voltage signal end, the electrode input end that is described DC power signal end receives negative voltage signal, when the negative input of described DC power signal end receives positive voltage signal, diode D backward stop, the coil no current of relay K passes through, the switch of relay K remains open state, make triode Q in cut-off state, between the control end g of the first switching tube Z and the first end s of the first switching tube Z, no-voltage is poor, cause the first switching tube Z in cut-off state, between the first output OUT1 of described anti-reverse connection circuit of direct current power supply and the second output OUT2, there is no voltage signal output.
In the present embodiment, by relay K is set, diode D, triode Q and the first switching tube Z, when DC power supply is oppositely accessed, diode D backward stop, the coil no current of relay K passes through, the switch of relay K remains open state, causing the base stage b of triode Q and the voltage of emitter e that are connected with the switch of relay K is zero, make triode Q in cut-off state, cause the voltage between the control end g of the first switching tube Z and the first end s of the first switching tube Z to cause the first switching tube Z cut-off, between the first output OUT1 of described anti-reverse connection circuit of direct current power supply and the second output OUT2, there is no voltage signal output, reach the object of anti-reverse protection.The circuit structure that the embodiment of the present invention provides is simple, and stability is high, and power consumption is less, has improved the performance of reverse-connection preventing circuit.
As a kind of optional execution mode, refer to Fig. 2, the another kind of anti-reverse connection circuit of direct current power supply structural representation that Fig. 2 provides for the embodiment of the present invention.As shown in Figure 2, the anti-reverse connection circuit of direct current power supply that the present embodiment provides comprises: relay K, diode D, resistance R 1, resistance R 2, switch element 210, the first switching tube Z, the 3rd switching tube are as triode Q1, resistance R 6 and resistance R 7.In the present embodiment, switch element 210 comprises that resistance R 3, resistance R 4, resistance R 5, second switch light are as triode Q2, and wherein, the type of triode Q1 is NPN type triode, and the type of triode Q2 is positive-negative-positive triode.Take the first switching tube Z type as N-type metal-oxide-semiconductor be example, the grid of N-type metal-oxide-semiconductor is the control end g of described the first switch light Z, the source electrode of N-type metal-oxide-semiconductor is the first end s of described the first switching tube Z, the drain electrode of N-type metal-oxide-semiconductor is the second end l of described the first switching tube Z.
Wherein, resistance R 1 is connected to one end of the electrode input end L of described DC power signal end and the coil of relay K; The other end of the coil of relay K is connected to the anode of diode D, and the negative electrode of described diode D is connected to the first end of the first end 1 of the switch of described relay K, the negative input N of described DC power signal end and described the first switching tube Z.
Resistance R 3 is connected between the collector electrode c of triode Q1 and the base stage b of triode Q2, resistance R 4 is connected between the base stage b of triode Q2 and the emitter e of triode Q2, the first end of resistance R 5 is connected between the electrode input end L of described DC power signal end and the emitter e of triode Q2 as the first output OUT1 of described anti-reverse connection circuit of direct current power supply, and the collector electrode c of triode Q2 is connected to the control end g of the first switching tube Z.
And, resistance R 6 is connected between the electrode input end L of described DC power signal end and the base stage b of triode Q1, resistance R 7 is connected between the base stage b of triode Q1 and the emitter e of triode Q1, and the emitter e of triode Q1 is connected to the second end 2 of the switch of relay K.Be the second end 2 of resistance R 3 switch that is connected to described relay K by triode Q1, wherein, resistance R 6, resistance R 7 are divider resistance.The second end of described the first switching tube Z is as the second output OUT2 of described anti-reverse connection circuit of direct current power supply.
When the described DC power signal end of the normal access of DC power supply, the electrode input end that is described DC power signal end receives positive voltage signal, when the negative input of described DC power signal end receives negative voltage signal, diode D forward conduction, the coil of relay K makes the switch of relay K convert connection status to from off-state by electric current, make triode Q1 and triode Q2 in conducting state, the voltage difference between the control end g of the first switching tube Z and the first end s of the first switching tube Z is ordered about the first switching tube Z conducting, between the first output OUT1 of described anti-reverse connection circuit of direct current power supply and the second output OUT2, there is power supply signal output.
When DC power supply oppositely accesses described d. c. voltage signal end, the electrode input end that is described DC power signal end receives negative voltage signal, when the negative input of described DC power signal end receives positive voltage signal, diode D backward stop, the coil no current of relay K passes through, the switch of relay K remains open state, make triode Q1, triode Q2 is in cut-off state, between the control end g of the first switching tube Z and the first end s of the first switching tube Z, no-voltage is poor, cause the first switching tube Z in cut-off state, between the first output OUT1 of described anti-reverse connection circuit of direct current power supply and the second output OUT2, there is no voltage signal output.
As a kind of optional execution mode, refer to Fig. 3, a kind of lamp circuit structural representation that Fig. 3 provides for the embodiment of the present invention.As shown in Figure 3, the light fixture that the present embodiment provides comprises that DC power signal end, light source load are as bulb Lamp and anti-reverse connection circuit of direct current power supply 30.Described anti-reverse connection circuit of direct current power supply 30 is connected between described DC power signal end and described light source load, so that described light source load is carried out to anti-reverse protection.Described anti-reverse connection circuit of direct current power supply 30 comprises: relay K, diode D, resistance R 1, resistance R 2, switch element 310, the first switching tube Z, the 3rd switch light are as triode Q1, resistance R 6 and resistance R 7.In the present embodiment, switch element 310 comprises that resistance R 3, resistance R 4, resistance R 5, second switch pipe are as triode Q2, and wherein, the type of triode Q1 is NPN type triode, and the type of triode Q2 is positive-negative-positive triode.Take switching tube Z type as N-type metal-oxide-semiconductor be example, the grid of N-type metal-oxide-semiconductor is the control end g of described the first switching tube Z, the source electrode of N-type metal-oxide-semiconductor is the first end s of described the first switching tube Z, the drain electrode of N-type metal-oxide-semiconductor is the second end l of described the first switching tube Z.
Wherein, resistance R 1 is connected to one end of the electrode input end L of described DC power signal end and the coil of relay K; The other end of the coil of relay K is connected to the anode of diode D, and the negative electrode of described diode D is connected to the first end of the first end 1 of the switch of described relay K, the negative input N of described DC power signal end and described the first switching tube Z.
Resistance R 3 is connected between the collector electrode c of triode Q1 and the base stage b of triode Q2, resistance R 4 is connected between the base stage b of triode Q2 and the emitter e of triode Q2, the first end of resistance R 5 is connected between the electrode input end L of described DC power signal end and the emitter e of triode Q2 as the first output OUT1 of described anti-reverse connection circuit of direct current power supply, and the collector electrode c of triode Q2 is connected to the control end g of switching tube Z.The second end of described the first switching tube Z is as the second output OUT2 of described anti-reverse connection circuit of direct current power supply.
And, resistance R 6 is connected between the electrode input end L of described DC power signal end and the base stage b of triode Q1, resistance R 7 is connected between the base stage b of triode Q1 and the emitter e of triode Q1, and the emitter e of triode Q1 is connected to the second end 2 of the switch of relay K.Be the second end 2 of resistance R 3 switch that is connected to described relay K by triode Q1, wherein, resistance R 6, resistance R 7 are divider resistance.
Bulb Lamp is connected between described the first output OUT1 and the second output OUT2.
When the described DC power signal end of the normal access of DC power supply, the electrode input end that is described DC power signal end receives positive voltage signal, when the negative input of described DC power signal end receives negative voltage signal, diode D forward conduction, the coil of relay K makes the switch of relay K convert connection status to from off-state by electric current, make triode Q1 and triode Q2 in conducting state, the voltage difference between the control end g of the first switching tube Z and the first end s of the first switching tube Z is ordered about the first switching tube Z conducting, between described the first output OUT1 and the second output OUT2, there is voltage signal output, bulb Lamp is lit, normal work.
When DC power supply oppositely accesses described d. c. voltage signal end, the electrode input end that is described DC power signal end receives negative voltage signal, when the negative input of described DC power signal end receives positive voltage signal, diode D backward stop, the coil no current of relay K passes through, the switch of relay K remains open state, make triode Q1, triode Q2 is in cut-off state, between the control end g of the first switching tube Z and the first end s of the first switching tube Z, no-voltage is poor, cause the first switching tube Z in cut-off state, between the first output OUT1 and the second output OUT2, there is no voltage signal output, bulb Lamp is in and extinguishes state, non-normal working.
In above-described embodiment, by relay K is set, diode D, triode Q and the first switching tube Z, when DC power supply is oppositely accessed, diode D backward stop, the coil no current of relay K passes through, the switch of relay K remains open state, causing the base stage b of triode Q1 and the voltage of emitter e that are connected with the switch of relay K is zero, make triode Q1 in cut-off state, and then cause triode Q2 also in cut-off state, cause the voltage between the control end g of the first switching tube Z and the first end s of the first switching tube Z to cause the first switching tube Z cut-off, between the first output OUT1 and the second output OUT2, there is no voltage signal output, reach anti-reverse protection object.The circuit structure that the embodiment of the present invention provides is simple, and stability is high, and power consumption is less, has improved the performance of reverse-connection preventing circuit.
Above anti-reverse connection circuit of direct current power supply provided by the present invention and light fixture are described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, to sum up, this description should not be construed as limitation of the present invention meanwhile.
Claims (10)
1. an anti-reverse connection circuit of direct current power supply, be used for being connected between DC power signal end and a load, so that described load is carried out to anti-reverse protection, described anti-reverse connection circuit of direct current power supply comprises: diode, relay, the first switching tube and second switch pipe, the anode of described diode is connected to the electrode input end of described DC power signal end by the coil of described relay, the negative electrode of described diode is connected to the negative input of described DC power signal end, the first end of the switch of described relay is connected to the negative electrode of described diode, and be connected to the first end of described the first switching tube, the second end of the switch of described relay is connected to the control end of described second switch pipe, the first end of described second switch pipe is connected to the electrode input end of described DC power signal end, and as the first output of described anti-reverse connection circuit of direct current power supply, the control end of described the first switching tube is connected to the second end of described second switch, the second end of described the first switching tube is as the second output of described anti-reverse connection circuit of direct current power supply, first and second output of described anti-reverse connection circuit of direct current power supply is used for connecting described load, when the electrode input end of described DC power signal end receives negative voltage signal, when the negative input of described DC power signal end receives positive voltage signal, described diode cut-off, the switch of described relay disconnects, make described first and second switching tube cut-off, thereby first and second output that makes described anti-reverse connection circuit of direct current power supply does not have voltage signal to export described load to.
2. anti-reverse connection circuit of direct current power supply as claimed in claim 1, it is characterized in that, when the electrode input end of described DC power signal end receives positive voltage signal, when the negative input of described DC power signal end receives negative voltage signal, described diode current flow, the switch of described relay is closed, makes described first and second switching tube conducting, thereby makes first and second output of described anti-reverse connection circuit of direct current power supply output voltage signal to described load.
3. anti-reverse connection circuit of direct current power supply as claimed in claim 1, it is characterized in that, described anti-reverse connection circuit of direct current power supply also comprises the first resistance, the anode of the described diode electrode input end that coil and described the first resistance by described relay is connected to described d. c. voltage signal end successively.
4. anti-reverse connection circuit of direct current power supply as claimed in claim 1, is characterized in that, described anti-reverse connection circuit of direct current power supply also comprises the second resistance, and described the second resistance is connected between the control end and first end of described the first switching tube.
5. anti-reverse connection circuit of direct current power supply as claimed in claim 1, it is characterized in that, described anti-reverse connection circuit of direct current power supply also comprises the 3rd and the 4th resistance, the second end of the switch of described relay is connected to the control end of described second switch pipe by described the 3rd resistance, described the 4th resistance is connected between the first end of described second switch pipe and the control end of described second switch pipe.
6. anti-reverse connection circuit of direct current power supply as claimed in claim 5, it is characterized in that, described anti-reverse connection circuit of direct current power supply also comprises the 5th resistance, and the first end of described second switch pipe is connected to the electrode input end of described d. c. voltage signal end by described the 5th resistance.
7. anti-reverse connection circuit of direct current power supply as claimed in claim 1, it is characterized in that, described the first switching tube is N channel field-effect pipe, the control end of described the first switching tube, first end and the second end are respectively grid, source electrode and the drain electrode of described field effect transistor, described second switch pipe is positive-negative-positive triode, and the control end of described second switch pipe, first end and the second end are respectively base stage, emitter and the collector electrode of described triode.
8. anti-reverse connection circuit of direct current power supply as claimed in claim 1, it is characterized in that, described anti-reverse connection circuit of direct current power supply also comprises the 3rd switching tube, the 6th resistance and the 7th resistance, the second end of the switch of described relay is connected to the control end of described second switch pipe by described the 3rd switching tube, the the described the 6th and the 7th resistance is connected between the electrode input end of described DC power signal end and the second end of the switch of described relay, node between the described the 6th and the 7th resistance is connected to the control end of described the 3rd switching tube, the first end of described the 3rd switching tube is connected to the second end of the switch of described relay, the second end of described the 3rd switching tube is connected to the control end of described second switch pipe, when the electrode input end of described DC power signal end receives negative voltage signal, when the negative input of described DC power signal end receives positive voltage signal, described diode cut-off, the switch of described relay disconnects, make the described first to the 3rd switching tube cut-off, thereby first and second output that makes described anti-reverse connection circuit of direct current power supply does not have voltage signal to export described load to.
9. anti-reverse connection circuit of direct current power supply as claimed in claim 8, it is characterized in that, described the first switching tube is N channel field-effect pipe, the control end of described the first switching tube, first end and the second end are respectively the grid of described field effect transistor, source electrode and drain electrode, described second switch pipe is positive-negative-positive triode, the control end of described second switch pipe, first end and the second end are respectively the base stage of described positive-negative-positive triode, emitter and collector electrode, described the 3rd switching tube is NPN type triode, the control end of described the 3rd switching tube, first end and the second end are respectively the base stage of described NPN type triode, emitter and collector electrode.
10. a light fixture; comprise DC power signal end, light source load and the anti-reverse connection circuit of direct current power supply as described in claim 1-9 item any one; described anti-reverse connection circuit of direct current power supply is connected between described DC power signal end and described light source load, so that described light source load is carried out to anti-reverse protection.
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| CN201210314202.4A CN103683264B (en) | 2012-08-30 | 2012-08-30 | A kind of anti-reverse connection circuit of direct current power supply and light fixture |
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| CN201210314202.4A CN103683264B (en) | 2012-08-30 | 2012-08-30 | A kind of anti-reverse connection circuit of direct current power supply and light fixture |
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| 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 |
| WO2018076294A1 (en) * | 2016-10-28 | 2018-05-03 | 海能达通信股份有限公司 | Reverse connection and current backflow prevention circuit |
| CN110509772A (en) * | 2018-05-22 | 2019-11-29 | 联合汽车电子有限公司 | Accessory power supply |
| CN112881937A (en) * | 2021-01-27 | 2021-06-01 | 阳光电源股份有限公司 | Safety detection device and method for direct-current power supply system |
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| CN101860999A (en) * | 2010-03-31 | 2010-10-13 | 海洋王照明科技股份有限公司 | Circuit for preventing reverse connection of power supply, LED lamp circuit and LED lamp |
| CN202050235U (en) * | 2011-04-27 | 2011-11-23 | 海洋王照明科技股份有限公司 | Battery reverse-connection protection circuit and lamp |
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| US20080191556A1 (en) * | 2005-07-28 | 2008-08-14 | Eppscore Co., Ltd. | Uninterruptible Power Supply for the Back up of Dc Power Source |
| CN101826724A (en) * | 2010-03-09 | 2010-09-08 | 海洋王照明科技股份有限公司 | Anti-reverse connection circuit of direct current power supply |
| CN101860999A (en) * | 2010-03-31 | 2010-10-13 | 海洋王照明科技股份有限公司 | Circuit for preventing reverse connection of power supply, LED lamp circuit and LED lamp |
| CN101860021A (en) * | 2010-04-09 | 2010-10-13 | 海洋王照明科技股份有限公司 | Circuit for preventing reverse connection of power supply and lamp |
| CN202050235U (en) * | 2011-04-27 | 2011-11-23 | 海洋王照明科技股份有限公司 | Battery reverse-connection protection circuit and lamp |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018076294A1 (en) * | 2016-10-28 | 2018-05-03 | 海能达通信股份有限公司 | Reverse connection and current backflow prevention circuit |
| 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 |
| CN110509772A (en) * | 2018-05-22 | 2019-11-29 | 联合汽车电子有限公司 | Accessory power supply |
| CN112881937A (en) * | 2021-01-27 | 2021-06-01 | 阳光电源股份有限公司 | Safety detection device and method for direct-current power supply system |
| CN112881937B (en) * | 2021-01-27 | 2022-07-12 | 阳光电源股份有限公司 | Safety detection device and method for direct-current power supply system |
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| CN103683264B (en) | 2017-10-13 |
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