CN102761246A - Power supply device and electronic device - Google Patents
Power supply device and electronic device Download PDFInfo
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- CN102761246A CN102761246A CN2011101086881A CN201110108688A CN102761246A CN 102761246 A CN102761246 A CN 102761246A CN 2011101086881 A CN2011101086881 A CN 2011101086881A CN 201110108688 A CN201110108688 A CN 201110108688A CN 102761246 A CN102761246 A CN 102761246A
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Abstract
The invention relates to a power supply device and an electronic device. The power supply device comprises a power supply circuit and a voltage control circuit, wherein the power supply circuit is used for transforming external AC voltage into first DC voltage. The voltage control circuit comprises a first voltage control unit, which is used for providing the first DC voltage for a first load device. The first voltage control unit comprises a switching circuit, a detection circuit and a delay circuit, wherein the switching circuit is arranged between the power supply circuit and the first load device; and the delay circuit is used for controlling the startup of the detection circuit after delaying for a preset period. The detection circuit is used for detecting whether the first lead device is switched in the first voltage control unit after starting up; and when detecting that the first lead device is switched in the first voltage control unit, the detection circuit controls the switching circuit to be closed, so that the first DC voltage output by the power supply circuit powers the first load device through the switch circuit.
Description
Technical field
The present invention relates to a kind of electric supply installation and adopt the electronic installation of this electric supply installation.
Background technology
Along with development of science and technology, each electronic product (like display, DVD, computer hard disc and audio player etc.) little by little obtains increasing application in people's work and life, makes to become an important problem how for each electronic product power supply.
Present electronic product all need dispose an electric supply installation usually, like power supply adaptor, is used for transferring the external communication electricity needs of direct voltage for this electronic product to.Yet; Electric supply installations such as existing power supply adaptor are plugging when being connected with the external communication electrical socket; When the power supply adaptor that has perhaps connected external communication electricity and electronic product plug and are connected; If do not design corresponding buffering or protective circuit, the dangerous phenomenons such as infringement of arcing, load faulty or the electronic component of moment may appear plugging, reduce the reliability and the useful life of this electronic product.
Summary of the invention
The technical problem that has dangerous phenomenon during for the plug of the power supply between solution prior art electric supply installation and the electronic product is necessary to provide a kind of electric supply installation that can improve the dangerous phenomenon when supplying power plug.
Simultaneously, also be necessary to provide a kind of electronic installation that adopts this electric supply installation.
A kind of electric supply installation; It comprises a power circuit and a voltage control circuit; It is one first direct voltage that this power circuit is used for the external communication voltage transitions; This voltage control circuit comprises one first voltage control unit, and this first voltage control unit is used for control this first direct voltage is offered one first load device to supply power to this first load device, and this first voltage control unit comprises a switching circuit, a circuit for detecting and a delay circuit; This switching circuit is used to be arranged between this power circuit and this first load device, and this circuit for detecting of control started after this delay circuit was used to postpone one first scheduled time.This circuit for detecting is used for whether this first load device of detecting inserts this first voltage control unit after startup; When detecting this first load device, this circuit for detecting inserted this first voltage control unit; This this switching circuit of circuit for detecting control is opened, and makes this this first direct voltage of power circuit output supply power to this first load device via this switching circuit; Otherwise this this switching circuit of circuit for detecting control cuts out.
A kind of electronic installation; It comprises an electric supply installation and at least one load device; This electric supply installation comprises a power circuit and a voltage control circuit; It is one first direct voltage that this power circuit is used for the external communication voltage transitions; This voltage control circuit comprises one first voltage control unit, and this first voltage control unit is used for control this first direct voltage is offered this load device to supply power to this load device, and this first voltage control unit comprises a switching circuit, a circuit for detecting and a delay circuit; This switching circuit is used to be arranged between this power circuit and this load device, and this circuit for detecting of control started after this delay circuit was used to postpone one first scheduled time.This circuit for detecting is used for whether this load device of detecting inserts this first voltage control unit after startup; When detecting this load device, this circuit for detecting inserted this first voltage control unit; This this switching circuit of circuit for detecting control is opened, and makes this this first direct voltage of power circuit output supply power to this load device via this switching circuit; Otherwise this this switching circuit of circuit for detecting control cuts out.
Compared with prior art; In electronic installation of the present invention and the electric supply installation thereof; This circuit for detecting detects and just controls this switching circuit unlatching after this load device has inserted; Thereby this first direct voltage is provided to this load device with to this load device power supply, can improves the dangerous phenomenon of not detecting load and directly providing voltage to cause; In addition; This delay circuit delays is just controlled this circuit for detecting and is started after one scheduled time; Make this electric supply installation connect external communication electricity moment can be to this load device power supply; The dangerous phenomenon of avoiding this electric supply installation instantaneous pressure to cause more greatly, therefore, electronic installation of the present invention and electric supply installation reliability thereof are higher.
Description of drawings
Fig. 1 is the circuit block diagram of electronic installation one preferred embodiments of the present invention.
Fig. 2 is the partial circuit block diagram of a kind of embodiment of change of electronic installation shown in Figure 1.
Fig. 3 is the physical circuit sketch map of electronic installation shown in Figure 2.
Fig. 4 is a kind of change embodiment of electronic installation shown in Figure 3.
The main element symbol description
Switching circuit 123,133
Circuit for detecting 125,135
Delay circuit 127,137
Indicating circuit 129,139
The first subelement 121a
The second subelement 121b
First conduction terminal 141,161
Second conduction terminal 143,163
Control end 145,165
The slow electric capacity 159 that starts
The 3rd resistance 171
Current-limiting resistance 181
Light-emitting diode 183
Isolating transformer 185
Following embodiment will combine above-mentioned accompanying drawing to further specify the present invention.
Embodiment
See also Fig. 1, it is the circuit block diagram of electronic installation one preferred embodiments of the present invention.This electronic installation 10 comprises an electric supply installation 100 and at least one load device 190, and this electric supply installation 100 is used for providing direct voltage to supply load device 190 to use to load device 190.Be to be understood that; This electronic installation 10 can comprise one, two or more load device 190; And this electric supply installation 100 can be to one, two or more load device (as shown in Figure 1 first to the N load device, and wherein N is greater than 2, and is natural number) power supply.Wherein, in execution mode shown in Figure 1, mainly be based on this electronic installation 10 and comprise a plurality of load devices 190 and this electric supply installation 100 the present invention will be described to the situation of a plurality of load devices 190 power supplies.
Particularly, this electric supply installation 100 can be a host computer, a TV, an or power supply unit.These a plurality of load devices 190 can be electronic products such as display, DTV STB, computer hard disc, video player, audio player, audio amplifier.In one embodiment, when this electric supply installation 100 is a host computer, this first to N load device 190 can be respectively display, computer hard disc, audio amplifier etc.Among the another kind of embodiment, when this electric supply installation is a TV, this first to N load device 190 can be respectively video player, DTV STB, audio amplifier etc.
This electric supply installation 100 comprises a power circuit 110 and a voltage control circuit 120.This power circuit 110 is used to receive external communication voltage and exports one first direct voltage.This first direct voltage that this voltage control circuit 120 is used to control with 110 outputs of this power circuit offers this a plurality of load devices 190, and it comprises a plurality of voltage control units 121 (like first, second to the N voltage control unit).Each voltage control unit 121 corresponding load device 190 is used to receive this first direct voltage and control this first direct voltage is offered this load device 190 to supply power to this load device 190.
In this execution mode, this first, second have essentially identical circuit structure and operation principle to N voltage control unit 121, below be that example is introduced mainly with this first voltage control unit 121.Yet, should be appreciated that following description for this first voltage control unit 121 can be applied to this equally second to N voltage control unit 121 and corresponding load device 190 thereof.
This first voltage control unit 121 comprises a switching circuit 123, a circuit for detecting 125 and a delay circuit 127.This switching circuit 123 is connected between this power circuit 110 and this first load device 190.This circuit for detecting 125 of control started after this delay circuit 127 was used to postpone a scheduled time.This circuit for detecting 125 is used for after startup this first load device 190 of detecting and whether inserts this first voltage control unit 121, and controls the unlatching of this switching circuit 123 or close according to the detecting result.When detecting this first load device 190, this circuit for detecting 125 inserted this first voltage control unit 121; This this switching circuit 123 of circuit for detecting 125 controls is opened; Make this first direct voltage of these power circuit 110 outputs be provided to this first load device 190, to supply power to this first load device 190 via this switching circuit 123.Do not insert this first voltage control unit 121 when this circuit for detecting 125 detects this first load device 190, these circuit for detecting 125 these switching circuits 123 of control cut out, and promptly to this first load device 190 this first direct voltage are not provided.
This power circuit 110 comprises that one is used to export first output 111 of this first direct voltage.This first load device 190 comprises that one is used to receive the first input end 191 of this first direct voltage.First output 111 that one end of this switching circuit 123 is electrically connected this power circuit 110 is used to receive this first direct voltage; The other end is electrically connected the first input end 191 of this first load device 190, is used for when opening, providing the first input end 191 of this first direct voltage to this first load device 190.Particularly, when the first input end 191 of this first load device 190 receives this first direct voltage, this first load device 190 can be started working.
This circuit for detecting 125 comprises that one is used to detect the sense terminal 1251 whether this first load device 190 inserts.Particularly; After this circuit for detecting 125 starts; When this sense terminal 1251 is provided a reference potential (like earthing potential 0V), then this circuit for detecting 125 judges that these first load devices 190 have inserted, and then controls this switching circuit 123 and open with to these first load device, 190 power supplies.Unsettled when this sense terminal 1251, then this circuit for detecting 125 judges that this first load device 190 does not insert, and then controls this switching circuit 123 and close, promptly not to these first load device, 190 power supplies.Accordingly; This first load device 190 also comprises an end 193 to be detected; The sense terminal 1251 that this end 193 to be detected is used to connect this circuit for detecting 125 is for these sense terminal 1251 detectings; This end 193 to be detected is provided this reference potential, and particularly, this end 193 to be detected can obtain this reference potential through ground connection.
In one embodiment, this first voltage control unit 121 can also comprise an indicating circuit 129, is used to show whether this switching circuit 123 is opened, and also we can say to be used to show whether this first load device 190 has been loaded this first direct voltage.Preferably; Node between the first input end 191 of these indicating circuit 129 these switching circuits 123 of connection and this first load device 190, and parallelly connected with this first load device 190, thus; When this first load device 190 is loaded this first direct voltage; This indicating circuit 129 also is loaded this first direct voltage, thus this indicating circuit 129 can start working, thereby show that to the user this first load device 190 is loaded the information of this first direct voltage.
For this voltage control circuit 120 generally, this first, second can be defined as one first scheduled time, one second scheduled time respectively to scheduled time of the delay of a plurality of delay circuits 127 of N voltage control unit 121 ... The one N scheduled time.Preferably, this first scheduled time, this second scheduled time ... This N scheduled time has nothing in common with each other.
See also Fig. 2; It is a kind of change embodiment of electronic installation 10 shown in Figure 1, wherein, need to prove; Be simplicity of illustration and convenient explanation; This electronic installation shown in Figure 2 is with respect to electronic installation shown in Figure 1, and only correspondence illustrates that power circuit 110, first voltage control unit 121 and first load device 190, the second to the N voltage control unit 121 and second are to not signal in the lump of N load device 190.It will be appreciated, of course, that if electronic installation 10 shown in Figure 2 only relates to one first load device 190, voltage control circuit 120 can only comprise first voltage control unit 121 that is used for to 190 power supplies of this first load device.
Particularly, electronic installation shown in Figure 2 10 mainly is with the difference of electronic installation shown in Figure 1: this power circuit 110 can further include one second output 113, is used to export one second direct voltage; This first load device 190 may further include one second input 195 accordingly and is used to receive this second direct voltage; Accordingly, this first voltage control unit 121 further comprises a switching circuit 133, a circuit for detecting 135 and a delay circuit 137.Be convenient explanation; Switching circuit 123, circuit for detecting 125, delay circuit 127 can be defined as the first subelement 121a of this first voltage control unit 121, and this switching circuit 133, circuit for detecting 135 and delay circuit 137 can be defined as the second subelement 121b.Thus; This first subelement 121a can comprise indicating circuit 129; And this first subelement 121a is with the circuit structure and the operation principle of first voltage control unit 121 shown in Figure 1 of introduction can be identical before; Its first direct voltage that is used to control with first output, 111 outputs of this power circuit 110 is provided to the first input end 191 of this first load device 190, so circuit structure and the operation principle of this first subelement 121a that locates just to repeat no more.
Correspondingly, this second subelement 121b is used to control second input 195 that first direct voltage that second output 113 of this power circuit 110 is exported is provided to this first load device 190.Particularly; Circuit structure and the operation principle of this second subelement 121b and this first subelement 121a are basic identical; Wherein second output 113 of this power circuit 110 of an end of this switching circuit 133 electrical connection is used to receive this second direct voltage, and second input 195 of this first load device 190 of other end electrical connection is used for when opening, providing second input 195 of this second direct voltage to this first load device 190.This circuit for detecting 135 of control started after this delay circuit 137 was used to postpone a scheduled time.This circuit for detecting 135 is used for after startup this first load device 190 of detecting and whether inserts this first voltage control unit 121, and controls the unlatching of this switching circuit 133 or close according to the detecting result.When detecting this first load device 190, this circuit for detecting 135 inserted this first voltage control unit 121; This this switching circuit 133 of circuit for detecting 135 controls is opened, and makes these power circuit 110 these second direct voltages of output supply power to this first load device 190 via this switching circuit 133.Do not insert this first voltage control unit 121 when this circuit for detecting 135 detects this first load device 190, these circuit for detecting 135 these switching circuits 133 of control cut out, and promptly to this first load device 190 this second direct voltage are not provided.Particularly, when second input 195 of this first load device 190 receives this second direct voltage, this first load device 190 also can be started working.
This circuit for detecting 135 comprises that one is used to detect the sense terminal 1351 whether this first load device 190 inserts.Particularly; After this circuit for detecting 135 starts; When this sense terminal 1351 is provided a reference potential (like earthing potential 0V); Then this circuit for detecting 135 judges that this first load device 190 has inserted, and then controls this switching circuit 133 and open to this first load device 190 this second direct voltage to be provided.Unsettled when this sense terminal 1351, then this circuit for detecting 135 judges that this first load device 190 does not insert, and then controls this switching circuit 133 and close, and promptly to this first load device 190 this second direct voltage is not provided.Preferably, this sense terminal 1351 also connects the end to be detected 193 of this first load device 190, and promptly this sense terminal 1351 and sense terminal 1251 all are connected to the sense terminal 193 of first load device 190.
This second subelement 121b can also comprise an indicating circuit 139, is used to show whether this switching circuit 133 is opened, and also we can say to be used to show whether this first load device 190 has been loaded this second direct voltage.Preferably; Node between second input 195 of these indicating circuit 139 these switching circuits 133 of connection and this first load device 190, and parallelly connected with this first load device 190, thus; When this first load device 190 is loaded this second direct voltage; This indicating circuit 139 also is loaded this second direct voltage, thus this indicating circuit 139 can start working, thereby show that to the user this first load device 190 is loaded the information of this second direct voltage.
Preferably, in this first voltage control unit 121, the scheduled time that the delay circuit 137 of the delay circuit 127 of this first subelement 121a and this second subelement 121b postpones is identical.
Be appreciated that; In one embodiment; Except that this first voltage control unit 121; Be used for to second to second during to the N voltage control unit of other load devices power supplies such as N load device when this first voltage control circuit 120 also comprises, according to the needs of these other load devices, this second can have above-mentioned these first voltage control unit, 121 essentially identical circuit structure and operation principles to the N voltage control unit equally; Promptly; Each voltage control unit comprises two sub-cells, and this two sub-cells control is provided to the corresponding load device respectively with first direct voltage, this second direct voltage of this power circuit output, and this second circuit structure and operation principle to the N voltage control unit also repeat no more here.Certainly; Further; In a kind of change embodiment of this embodiment, this power circuit can further be exported one the 3rd direct voltage, and each voltage control unit also can further one the 3rd subelement; The 3rd subelement can have and essentially identical circuit structure of first or second subelement and operation principle, is used for control the 3rd direct voltage is provided to the corresponding load device.
Further, see also Fig. 3, present embodiment also proposes a kind of first subelement 121a of this first voltage control unit 121 and the particular circuit configurations of the second subelement 121b.Among this first subelement 121a, this switching circuit 123 comprises one first switching transistor 140.This first switching transistor 140 comprises one first conduction terminal 141, one second conduction terminal 143 and a control end 145; This first conduction terminal 141 connects first output 111 of this power circuit 110; This second conduction terminal 143 connects the first input end 191 of this first load device 190, and this control end 145 connects this circuit for detecting 125.Preferentially, this first switching transistor 140 is the P-channel field-effect transistor (PEFT) transistor, and thus, this first conduction terminal 141, this second conduction terminal 143 and this control end 145 are respectively the transistorized source electrode of this P-channel field-effect transistor (PEFT), drain and gate.
This circuit for detecting 125 comprises a series connection branch road 150.One end of this series arm 150 connects first conduction terminal 141 of this first switching transistor 140, is used to receive this first direct voltage; The other end of this series arm 150 connects the sense terminal 1251 of this circuit for detecting 125, is used to connect the end to be detected 193 of this first load device 190.After this circuit for detecting 125 starts, if this sense terminal 1251 is connected reference potential (like earthing potential), make this first direct voltage connect this reference potential via this series arm 150, and then these series arm 150 conductings.When these series arm 150 conductings, then this circuit for detecting 125 judges that this first load device 190 has inserted.This series arm 150 comprises one first resistance 151 connected in series, one second resistance 153 and one first diode 155.Wherein the main effect of this first diode 155 is that unidirectional conducting avoids this reference voltage oppositely to pour into, yet in a kind of change embodiment, this series arm 150 also can not comprise this first diode 155.This first resistance 151 is connected between first conduction terminal 141 and control end 145 of first switching transistor 140, and this second resistance 153 and this first diode 155 are series between the sense terminal 1251 of control end 145 and this circuit for detecting 125 of this first switching transistor 140.This circuit for detecting 125 can also comprise a slow startup electric capacity 159 parallelly connected with this first resistance, is used for the detecting function of this circuit for detecting 125 is necessarily postponed, and reaches the effect of the whole electric supply installation of protection.If do not say the concrete structure of series arm 150, can't see the annexation between the series arm 150 and first switching transistor 140.
This delay circuit 127 comprises a second switch transistor 160 and a control branch road 170.This second switch transistor 160 comprises one first conduction terminal 161, one second conduction terminal 163 and a control end 165; This first conduction terminal 161 connects first output 111 of this power circuit 110; This second conduction terminal 163 connects the control end 145 of this first switching transistor 140, and this control end 165 connects should control branch road 170.Preferentially, this second switch transistor 160 is the P-channel field-effect transistor (PEFT) transistor, and thus, this first conduction terminal 161, this second conduction terminal 163 and this control end 165 are respectively the transistorized source electrode of this P-channel field-effect transistor (PEFT), drain and gate.
This control branch road 170 is used to accomplish the delay of this scheduled time, and the conducting of controlling this second switch transistor 160 with end.Particularly; When this control branch road 170 is not accomplished the delay of this scheduled time (when carrying out the delay of this scheduled time in other words); When these control branch road 170 these second switch transistor 160 conductings of control; Make first resistance 151 of this series arm 150 by short circuit, thereby the series arm 150 of this circuit for detecting 125 is locked, and can't start detecting.After this control branch road 170 is accomplished the delay of this scheduled time, to control these second switch transistors 160 when this control branch road 170 and end, first resistance 151 of this series arm 150 is no longer by short circuit, and this circuit for detecting 125 starts detecting.
This control branch road 170 comprises that a RC delayed branch and supplies second diode 175 of this RC delayed branch discharge.This RC delayed branch comprises one the 3rd resistance 171 and an electric capacity 173 of series connection.The 3rd resistance 171 is connected between first conduction terminal 161 and control end 165 of this second switch transistor 160, and this electric capacity 173 is connected between the control end 165 and ground of this second switch transistor 160.This second diode 175 is parallelly connected with the 3rd resistance 171.Particularly, the negative electrode of this second diode 175 connects first conduction terminal 161 of this second switch transistor 160, and anode connects the control end 165 of this second switch transistor 160.
This indicating circuit 129 is connected between second conduction terminal 143 and ground of this first switching transistor 140, and it comprises the light-emitting diode 183 that a current-limiting resistance 181 and is connected with this current-limiting resistance 181.
This second subelement 121b has the essentially identical circuit structure with this first subelement 121a, more than the description of the particular circuit configurations of this first subelement 121a is equally applicable to this second subelement 121b, promptly repeat no more here.
Below in conjunction with this particular circuit configurations how two sub-cells 121a of this first voltage control unit 121 and 121b being controlled this first direct voltage introduces with the principle that this second direct voltage is provided to this first load device 190.
Need to prove that this electric supply installation 100 is two independently electronic devices with this first load device 190 usually, the electrical connection between the two normally needs the user to pass through cable to peg graft and realize, such as, host computer and display.Particularly, this cable can be one, two or many, and when the grafting of accomplishing this cable, this first voltage control unit 121 has connected first input end 191, second input 193 and the end to be detected 195 of this first load device 190.Based on more than; When the operation of this first voltage control unit 121 can be according to 100 starts of this electric supply installation (perhaps before the start), the different situations whether this first load device has connected this first voltage control unit 121 through cable are divided into two parts.
At first, first is if before this electric supply installation 100 was perhaps started shooting when starting shooting, this first load device 190 was connected to this first voltage control unit 121 through cable.After these electric supply installation 100 starts; This power circuit 110 starts; With the external communication voltage transitions is one first direct voltage and one second direct voltage, and this first direct voltage and one second direct voltage are provided to this first subelement 121a and the second subelement 121b respectively.Wherein, this first direct voltage and one second direct voltage can be respectively 12V and 5V.
This first subelement 121a receives the moment of this first direct voltage; First conduction terminal 141 of this first switching transistor 140 receives this first direct voltage and has high potential; First conduction terminal 161 of this second switch transistor 160 receives this first direct voltage and also has high potential; Because the control end 165 of this second switch transistor 160 is electric capacity 173 ground connection through this control branch road 170; Because of being recharged, this electric capacity 173 do not make the control end 165 of this second switch transistor 160 this moment have electronegative potential, and then these second switch transistor 160 conductings.When these second switch transistor 160 conductings; Make first resistance 151 of this series arm 150 by short circuit; This series arm 150 can't conducting make this circuit for detecting 125 to start, and further, this first direct voltage is provided to the control end 145 of this first switching transistor 140 via two conduction terminal 161 and 163 of this second switch transistor 160; Make the control end 145 of this first switching transistor 140 also have and its first conduction terminal 141 essentially identical high potentials; So this first switching transistor 140 ends, at this moment, though this first load device 190 has inserted this electric supply installation 100; But this switching circuit 123 is not opened, so this first direct voltage is not provided to this first load device 190.
Then; A period of time after this first subelement 121a receives this first direct voltage; This first direct voltage is via 173 chargings of 171 pairs of these electric capacity of the 3rd resistance; When this electric capacity 173 is recharged and after having this first direct voltage, the control end 165 of this second switch transistor 160 has and its first conduction terminal 161 essentially identical high potentials, make this second switch transistor 160 by (promptly this delay circuit 127 is accomplished the delay of these scheduled times).Further; Because this second switch transistor 160 ends; The short circuit of this first resistance 151 is disengaged; And then the series arm 150 of this circuit for detecting 125 starts; This first direct voltage is via this series arm 150, this sense terminal 1251, these end 193 ground connection to be detected, and promptly this series arm 150 forms paths (i.e. this circuit for detecting 125 detect this first load device 190 inserted), because of the dividing potential drop of this first resistance 151 and second resistance 153 makes the control end 145 of this first switching transistor 140 have the current potential that is lower than its first conduction terminal 141; And then these first switching transistor, 140 conductings, the first input end 191 of this first load device 190 receives first direct voltage that second conduction terminal 143 of this first switching transistor 140 provides.
In like manner; This second subelement 121b is in the moment that receives this second direct voltage; Because this delay circuit 137 is not accomplished the delay of this scheduled time; The series arm 150 of this circuit for detecting 135 is locked, and this second direct voltage is not provided to second input 195 of this first load device 190.
Then; A period of time after this second subelement 121b receives this second direct voltage; This delay circuit 137 is accomplished the delay of this scheduled time; The series arm of this circuit for detecting 135 starts and forms path, thereby controls this second switch transistor 160 conductings, and second input 195 of this first load device 190 receives second direct voltage that second conduction terminal 195 of this second switch transistor 160 provides.
Secondly; Second portion; This first load device 190 is to have started shooting a period of time at this electric supply installation 100; Just be connected to this first voltage control unit 121 through cable, in other words, this first load device 190 just is connected to this first voltage control unit 121 through cable when these electric supply installation 100 work.Do not insert first voltage control unit 121 of this electric supply installation 100 when this first load device 190; After these electric supply installation 100 starts; This power circuit 110 starts; With the external communication voltage transitions is this first direct voltage and this second direct voltage, and this first direct voltage and one second direct voltage are provided to this first subelement 121a and the second subelement 121b respectively.
This first subelement 121a receives the moment of this first direct voltage; First conduction terminal 141 of this first switching transistor 140 receives this first direct voltage and has high potential; First conduction terminal 161 of this second switch transistor 160 receives this first direct voltage and also has high potential; Because the control end 165 of this second switch transistor 160 is electric capacity 173 ground connection through this control branch road 170; Because of being recharged, this electric capacity 173 do not make the control end 165 of this second switch transistor 160 this moment have electronegative potential, and then these second switch transistor 160 conductings.When these second switch transistor 160 conductings; Make first resistance 151 of this series arm 150 by short circuit; This series arm 150 can't conducting make this circuit for detecting 125 to start; Further; This first direct voltage is provided to the control end 145 of this first switching transistor 140 via two conduction terminal 161 and 163 of this second switch transistor 160, makes the control end 145 of this first switching transistor 140 also have and its first conduction terminal 141 essentially identical high potentials, so this first switching transistor 140 ends.
Then; A period of time after this first subelement 121a receives this first direct voltage; This first direct voltage is via 173 chargings of 171 pairs of these electric capacity of the 3rd resistance; When this electric capacity 173 is recharged and after having this first direct voltage, the control end 165 of this second switch transistor 160 has and its first conduction terminal 161 essentially identical high potentials, make this second switch transistor 160 by (promptly this delay circuit 127 is accomplished the delay of these scheduled times).Further, because this second switch transistor 160 ends, the short circuit of this first resistance 151 is disengaged, and then series arm 150 startups of this circuit for detecting 125, can detect this first load device 190.Yet this moment; This first load device 190 does not connect this first voltage control unit 121 (promptly this first load device 190 is not inserted this first voltage control unit 121) through cable; This series arm 150 can't form path (promptly the series arm 150 of this circuit for detecting 125 does not detect this first load device 190); The control end 145 of this first switching transistor 140 is equivalent to unsettled and has and its first conduction terminal 141 essentially identical high potentials, so this first switching transistor 140 ends.
In like manner, this second subelement 121b is in the moment that receives this second direct voltage, because this delay circuit 137 is not accomplished the delay of this scheduled time, the series arm 150 of this circuit for detecting 135 is locked, and this first switching transistor 140 ends.Then, a period of time after this second subelement 121b receives this second direct voltage, this delay circuit 137 is accomplished the delay of this scheduled time, and the series arm of this circuit for detecting 135 starts, and can detect this first load device 190.Yet this moment; This first load device 190 does not connect this first voltage control unit 121 through cable; This series arm 150 can't form path; The control end 145 of this first switching transistor 140 is equivalent to unsettled and has and its first conduction terminal 141 essentially identical high potentials, so this first switching transistor 140 still ends.
Further; Among this first subelement 121a; When this delay circuit 127 has been accomplished the delay of this scheduled time; After the series arm 150 of this circuit for detecting 125 had started, the user was connected to this first voltage control unit 121 through cable with this first load device 190, and this first direct voltage is via this series arm 150, this sense terminal 1251, these end 193 ground connection to be detected; Promptly this series arm 150 forms path; Because of the dividing potential drop of this first resistance 151 and second resistance 153 makes the control end 145 of this first switching transistor 140 have the current potential that is lower than its first conduction terminal 141, and then these first switching transistor, 140 conductings, the first input end 191 of this first load device 190 receives first direct voltage that second conduction terminal 143 of this first switching transistor 140 provides.
In like manner; Among this second subelement 121b; Accomplished the delay of this scheduled time at this delay circuit 137; After the series arm 150 of this circuit for detecting 135 had started, this first load device 190 was connected to this first voltage control unit 121 through cable, and this first direct voltage is via this series arm 150, this sense terminal 1251, these end 195 ground connection to be detected; Promptly this series arm 150 forms path; Because of the dividing potential drop of this first resistance 151 and second resistance 153 makes the control end 145 of this first switching transistor 140 have the current potential that is lower than its first conduction terminal 141, and then these first switching transistor, 140 conductings, second input 195 of this first load device 190 receives second direct voltage that second conduction terminal 143 of this first switching transistor 140 provides.
Compared with prior art; In electronic installation 10 and the electric supply installation 100 thereof; This circuit for detecting 125 detects and just controls this switching circuit 123 unlatchings after this first load device 190 has inserted; Thereby this first direct voltage is provided to this first load device 190 with to these first load device, 190 power supplies, can improves the dangerous phenomenon of not detecting load and directly providing voltage to cause.
In addition; Principle introduction according to above-mentioned first; Before when these electric supply installation 100 starts, perhaps starting shooting, this first load device 190 is connected to this first voltage control unit 121 through cable, starts because this delay circuit is just controlled this circuit for detecting 125 after 127 one scheduled times of delay; Make that this electric supply installation 100 can be to these first load device, 190 power supplies in the moment of starting shooting, the dangerous phenomenon of avoiding these electric supply installation 100 start instantaneous pressures to cause more greatly.
In addition, for this electric supply installation 100, it can comprise that a plurality of voltage control units 121 provide direct voltage to these a plurality of load devices 190, and then these a plurality of load devices 190 need not the power supply adaptor that each self-configuring exchanges changes direct current.Therefore, for these a plurality of load devices 190, its safe in utilization being guaranteed not only, its manufacturing cost also can be reduced largely.
Further; When this electric supply installation 100 comprises a plurality of voltage control units 121; And when these electric supply installation 100 starts or before the start; When these a plurality of load devices 190 have been connected respectively to this a plurality of voltage control unit 121 through cable; Setting the scheduled time that a plurality of delay circuits 127 of these a plurality of voltage control units 121 postpone has nothing in common with each other, and can avoid the dangerous phenomenon that 100 moments of this electric supply installation provide voltage to cause to a plurality of load devices 190 so that this a plurality of voltage control units 121 are supplied power to a plurality of load devices 190 according to the scheduled time separately in order.
Further, this first voltage control unit 121 can also comprise that two sub-cells are to provide a plurality of direct voltages to same load device.
Further; In this first voltage control unit 121; The scheduled time that two delay circuits 127 of this first subelement 121a and the second subelement 121b and 137 postpone is when basic identical; Can guarantee that this first direct voltage and second direct voltage are provided for this first load device 190 basically simultaneously, the interference of avoiding two direct voltage sequential differences to cause.
See also Fig. 4, it is a kind of change embodiment of electronic installation shown in Figure 3.The main difference of this electronic installation and electronic installation shown in Figure 3 is: among the first subelement 121a; One isolating transformer 185 and a filter capacitor 187 are set between the first input end 191 of the switching circuit 123 and first load device 190; Be used to filter clutter to stablize the output of this switching circuit 123, make the first input end 191 of this first load device 190 receive the first more stable direct voltage.Further; Among the second subelement 121b; One isolating transformer 185 and a filter capacitor 187 also can be set between second input 195 of switching circuit 133 and this first load device 190; Be used to stablize the output of this switching circuit 133, make second input 195 of this first load device 190 receive the second more stable direct voltage.
Claims (26)
1. electric supply installation; It is characterized in that: this electric supply installation comprises a power circuit and a voltage control circuit; It is one first direct voltage that this power circuit is used for the external communication voltage transitions; This voltage control circuit comprises one first voltage control unit; This first voltage control unit is used for control this first direct voltage is offered one first load device to supply power to this first load device; This first voltage control unit comprises a switching circuit, a circuit for detecting and a delay circuit, and this switching circuit is used to be arranged between this power circuit and this first load device, and this circuit for detecting of control started after this delay circuit was used to postpone a scheduled time; This circuit for detecting is used for whether this first load device of detecting inserts this first voltage control unit after startup; Inserted this first voltage control unit when this circuit for detecting detects this first load device, this this switching circuit of circuit for detecting control is opened, and makes this this first direct voltage of power circuit output supply power to this first load device via this switching circuit; Otherwise this this switching circuit of circuit for detecting control cuts out.
2. electric supply installation according to claim 1; It is characterized in that: this circuit for detecting comprises that one is used to detect the sense terminal whether this first load device inserts; When this sense terminal is provided a reference potential; Then this circuit for detecting judges that this first load device inserts, and unsettled when this sense terminal, then this circuit for detecting judges that this first load device does not insert.
3. like the said electric supply installation of claim 2, it is characterized in that: this reference potential is an earthing potential.
4. like the said electric supply installation of claim 2, it is characterized in that: this first load device comprises an end to be detected, and the sense terminal that this end to be detected is used to connect this circuit for detecting is for this sense terminal detecting, and this end to be detected is provided this reference potential.
5. like the said electric supply installation of claim 4, it is characterized in that: this end to be detected obtains this reference potential through ground connection.
6. like the said electric supply installation of claim 2; It is characterized in that: this switching circuit comprises one first switching transistor; This first switching transistor comprises one first conduction terminal, one second conduction terminal and a control end; This first conduction terminal connects this power circuit to receive this first direct voltage, and this second conduction terminal connects this first load device so that this first direct voltage is offered this first load device, and this control end connects this circuit for detecting.
7. like the said electric supply installation of claim 6, it is characterized in that: this first switching transistor is the P-channel field-effect transistor (PEFT) transistor, and this first conduction terminal, this second conduction terminal and this control end are respectively the transistorized source electrode of this P-channel field-effect transistor (PEFT), drain and gate.
8. like the said electric supply installation of claim 6, it is characterized in that: this circuit for detecting comprises a series connection branch road, and first conduction terminal that an end of this series arm connects this first switching transistor is used to receive this first direct voltage; The other end of this series arm connects the sense terminal of this circuit for detecting, and when this series arm formation path, this circuit for detecting judges that this first load device inserts.
9. like the said electric supply installation of claim 8; It is characterized in that: this series arm comprises one first resistance connected in series and one second resistance; This first resistance is connected between first conduction terminal and control end of first switching transistor, and this second resistance and this first diode are series between the sense terminal of control end and this circuit for detecting of this first switching transistor.
10. like the said electric supply installation of claim 9, it is characterized in that: this series arm comprises that also one is connected in first diode between this second resistance and this sense terminal, and the anode of this first diode connects this second resistance, and negative electrode connects this sense terminal.
11. like the said electric supply installation of claim 9, it is characterized in that: this series arm also comprises a slow startup electric capacity parallelly connected with this first resistance.
12. like the said electric supply installation of claim 9; It is characterized in that: this delay circuit comprises a second switch transistor and a control branch road; This second switch transistor comprises one first conduction terminal, one second conduction terminal and a control end; This first conduction terminal connects first output of this power circuit; This second conduction terminal connects the node between this first resistance and second resistance, and this control end connects should control branch road, and this control branch road is used to accomplish the delay of this scheduled time and controls the transistorized conducting of this second switch and end.
13. like the said electric supply installation of claim 12, it is characterized in that: this second switch transistor is the P-channel field-effect transistor (PEFT) transistor, and this first conduction terminal, this second conduction terminal and this control end are respectively the transistorized source electrode of this P-channel field-effect transistor (PEFT), drain and gate.
14. like the said electric supply installation of claim 12; It is characterized in that: when this control branch road is not accomplished the delay of this scheduled time; When this this second switch transistor turns of control branch road control; Make first resistance of this series arm by short circuit, thereby the series arm of this circuit for detecting is locked, and can't start detecting; After this control branch road is accomplished the delay of this scheduled time, to control this second switch transistor when this control branch road and end, first resistance of this series arm is no longer by short circuit, and this circuit for detecting starts detecting.
15. like the said electric supply installation of claim 14; It is characterized in that: this control branch road comprises a RC delayed branch; This RC delayed branch comprises one the 3rd resistance and an electric capacity of series connection; The 3rd resistance is connected between transistorized first conduction terminal of this second switch and the control end, and this electric capacity is connected between transistorized control end of this second switch and the ground.
16. like the said electric supply installation of claim 15; It is characterized in that: this control branch road also comprises second diode parallelly connected with the 3rd resistance with; The negative electrode of this second diode connects transistorized first conduction terminal of this second switch, and anode connects the transistorized control end of this second switch.
17. electric supply installation according to claim 1, it is characterized in that: this first voltage control unit can also comprise an indicating circuit, is used to show whether this switching circuit is opened.
18., it is characterized in that like the said electric supply installation of claim 17: the node between this indicating circuit this switching circuit of connection and this first load device, parallelly connected with this first load device.
19. like the said electric supply installation of claim 18, it is characterized in that: this indicating circuit comprises the series arm that is made up of a current-limiting resistance and a light-emitting diode, and this series arm is connected between this switching circuit and the ground.
20. electric supply installation according to claim 1; It is characterized in that: this voltage control circuit comprises that also one is used for second voltage control unit to the power supply of one second load device; This second voltage control unit; Be used for control this first direct voltage is offered this second load device to supply power to this second load device; This second voltage control unit comprises a switching circuit, a circuit for detecting and a delay circuit; The switching circuit of this second voltage control unit is used to be arranged between this power circuit and this second load device; The circuit for detecting of this second voltage control unit of control started after the delay circuit of this second voltage control unit was used to postpone a scheduled time; The circuit for detecting of this second voltage control unit is used for whether this second load device of detecting inserts this second voltage control unit after startup; Inserted this second voltage control unit when the circuit for detecting of this second voltage control unit detects this second load device, the switching circuit of this second voltage control unit of circuit for detecting control of this second voltage control unit is opened, make this this first direct voltage of power circuit output via the switching circuit of this second voltage control unit to this second load device power supply; Otherwise the switching circuit of this second voltage control unit of circuit for detecting control of this second voltage control unit cuts out.
21. like the said electric supply installation of claim 20, it is characterized in that: the delay circuit of this first voltage control unit is different with the scheduled time of the delay circuit delays of this second voltage control unit.
22. like the said electric supply installation of claim 4; It is characterized in that: this power circuit is also exported one second direct voltage; This first voltage control unit also comprises another switching circuit, another circuit for detecting and another delay circuit; This switching circuit, this circuit for detecting and this delay circuit define one first subelement; This another switching circuit, another circuit for detecting and another delay circuit define one second subelement; This second subelement is used for control this second direct voltage is provided to this first load device, and this another switching circuit is used to be arranged between this power circuit and this first load device, and this another circuit for detecting of control started after this another delay circuit was used to postpone a scheduled time; This another circuit for detecting is used for whether this first load device of detecting inserts this first voltage control unit after startup; Inserted this first voltage control unit when this another circuit for detecting detects this first load device, this another this another switching circuit of circuit for detecting control is opened, and makes this this second direct voltage of power circuit output be provided to this first load device via this another switching circuit; Otherwise this another this another switching circuit of circuit for detecting control cuts out.
23. like the said electric supply installation of claim 22, it is characterized in that: the scheduled time of the delay circuit delays of this first subelement is identical with the scheduled time of the delay circuit delays of this second subelement.
24. like the said electric supply installation of claim 22; It is characterized in that: this another circuit for detecting comprises that one is used to detect the sense terminal whether this first load device inserts; When this sense terminal is provided a reference potential, then this another circuit for detecting judges that this first load device inserts, when this sense terminal unsettled; Then this another circuit for detecting judges that this first load device does not insert, and the sense terminal of this another circuit for detecting and the sense terminal of this circuit for detecting all are connected the end to be detected of this first load device.
25. electric supply installation is characterized in that: an isolating transformer and a filter capacitor are set between this switching circuit and first load device, are used to stablize this first direct voltage according to claim 1.
26. electronic installation; It comprises an electric supply installation and at least one load device; This electric supply installation comprises a power circuit and a voltage control circuit; It is one first direct voltage that this power circuit is used for the external communication voltage transitions; This voltage control circuit comprises one first voltage control unit, and this first voltage control unit is used for control this first direct voltage is offered this load device to supply power to this load device, and this first voltage control unit comprises a switching circuit, a circuit for detecting and a delay circuit; This switching circuit is used to be arranged between this power circuit and this load device; This circuit for detecting of control started after this delay circuit was used to postpone one first scheduled time, and this circuit for detecting is used for whether this load device of detecting inserts this first voltage control unit after startup, has inserted this first voltage control unit when this circuit for detecting detects this load device; This this switching circuit of circuit for detecting control is opened, and makes this this first direct voltage of power circuit output supply power to this load device via this switching circuit; Otherwise this this switching circuit of circuit for detecting control cuts out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110108688.1A CN102761246B (en) | 2011-04-28 | 2011-04-28 | Power supply device and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110108688.1A CN102761246B (en) | 2011-04-28 | 2011-04-28 | Power supply device and electronic device |
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| CN102761246A true CN102761246A (en) | 2012-10-31 |
| CN102761246B CN102761246B (en) | 2014-11-05 |
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| CN201110108688.1A Active CN102761246B (en) | 2011-04-28 | 2011-04-28 | Power supply device and electronic device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944367A (en) * | 2013-01-22 | 2014-07-23 | 控制技术有限公司 | Desaturation detection circuit, circuit including the same and method for operating the same |
| CN106773997A (en) * | 2017-01-10 | 2017-05-31 | 曾令豪 | A kind of auto powering on/off apparatus, method and insert row |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003299355A (en) * | 2002-04-03 | 2003-10-17 | Seiko Epson Corp | Ac adaptor and charger |
| CN101064481A (en) * | 2006-04-29 | 2007-10-31 | 英业达股份有限公司 | Power supply control system |
| CN101916977A (en) * | 2010-07-30 | 2010-12-15 | 纽福克斯光电科技（上海）有限公司 | Power socket protection circuit |
-
2011
- 2011-04-28 CN CN201110108688.1A patent/CN102761246B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003299355A (en) * | 2002-04-03 | 2003-10-17 | Seiko Epson Corp | Ac adaptor and charger |
| CN101064481A (en) * | 2006-04-29 | 2007-10-31 | 英业达股份有限公司 | Power supply control system |
| CN101916977A (en) * | 2010-07-30 | 2010-12-15 | 纽福克斯光电科技（上海）有限公司 | Power socket protection circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944367A (en) * | 2013-01-22 | 2014-07-23 | 控制技术有限公司 | Desaturation detection circuit, circuit including the same and method for operating the same |
| CN103944367B (en) * | 2013-01-22 | 2017-09-19 | 尼得科控制技术有限公司 | It is a kind of to move back saturation detection circuit, the circuit comprising it and its operating method |
| CN106773997A (en) * | 2017-01-10 | 2017-05-31 | 曾令豪 | A kind of auto powering on/off apparatus, method and insert row |
| CN106773997B (en) * | 2017-01-10 | 2019-11-08 | 曾令豪 | A kind of auto powering on/off apparatus, method and insert row |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102761246B (en) | 2014-11-05 |
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Address after: 518109 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 1, floor 4, Applicant after: Qunkang Technology (Shenzhen) Co., Ltd. Applicant after: Innolux Display Group Address before: 518109 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 1, floor 4, Applicant before: Qunkang Technology (Shenzhen) Co., Ltd. Applicant before: Chimei Optoelectronics Co., Ltd. |
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