CN103051211A - Power adapter - Google Patents
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- CN103051211A CN103051211A CN2012105647625A CN201210564762A CN103051211A CN 103051211 A CN103051211 A CN 103051211A CN 2012105647625 A CN2012105647625 A CN 2012105647625A CN 201210564762 A CN201210564762 A CN 201210564762A CN 103051211 A CN103051211 A CN 103051211A
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Abstract
The invention discloses a power adapter comprising an alternating current input circuit, an electromagnetic interference filter circuit, a rectifier filter circuit, a pulse width modulation circuit, a transformer, a first rectifier filter circuit and a second rectifier filter circuit; the alternating current input circuit is connected with an external alternating current power supply; the electromagnetic interference filter circuit is connected with an alternating current input circuit; the rectifier filter circuit is connected with the electromagnetic interference filter circuit; the pulse width modulation circuit is connected with the rectifier filter circuit; the transformer is connected with the pulse width modulation circuit; the first rectifier filter circuit is respectively connected with the transformer and a first voltage output end Vout1; the first voltage output end Vout1 is connected with first electric appliance equipment; the second rectifier filter circuit is respectively connected with the transformer and second voltage output end Vout2; and the second voltage output end Vout2 is connected with second electric appliance equipment. According to the power adapter disclosed by the invention, double-circuit voltage independent output can be realized, so that the normal working requirements of two pieces of electric appliance equipment are met, the adapter purchasing cost of a user and the valuable indoor space of a user are saved.
Description
Technical field
The present invention relates to power technique fields, particularly relate to a kind of power supply adaptor.
Background technology
In recent years, along with the day by day raising of people's living standard, the domestic electric appliances such as television set, video camera, camera are more and more universal in people's daily life and life, and various electric equipments have become people's indispensable part of living.
At present, for various electric equipments, usually need to be connected with external power source by power supply adaptor, every electric equipment need to configure respectively a power supply adaptor and carry out externally fed usually.
Therefore, when the user needs to use many electric equipments (such as display) simultaneously, then need the respective numbers adapter that matches, thereby greatly increased user's adapter purchase cost, and too much power line, make troubles not only can for user's routine use electric equipment, but also take the interior space of user's preciousness, the product that seriously reduces the user uses impression.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of power supply adaptor, it can realize that two-way voltage independently exports, can satisfy the normal operation needs of two electric equipments, thereby save user's adapter purchase cost and the interior space of user's preciousness, the product that significantly strengthens the user uses impression, is of great practical significance.
For this reason, the invention provides a kind of power supply adaptor, comprising:
Ac input circuit is connected with external ac power source, receives the alternating voltage of external ac power source output, then exports to electromagnetic interference filter circuit;
Electromagnetic interference filter circuit is connected with ac input circuit, for the alternating voltage filtering electromagnetic interference that ac input circuit is exported, then exports to current rectifying and wave filtering circuit;
Current rectifying and wave filtering circuit is connected with electromagnetic interference filter circuit, is used for the alternating voltage of electromagnetic interference filter circuit output is boosted and rectification, forms direct voltage, then exports to pulse-width modulation circuit after filtering;
Pulse-width modulation circuit is connected with current rectifying and wave filtering circuit, is used for the direct voltage of current rectifying and wave filtering circuit output is carried out pulse width modulation, forms the direct voltage of predeterminated frequency scope, then exports to transformer;
Transformer is connected with pulse-width modulation circuit, is used for the direct voltage of pulse-width modulation circuit output is carried out the step-down processing, then tells two-way voltage and exports to respectively the first current rectifying and wave filtering circuit and the second current rectifying and wave filtering circuit;
The first current rectifying and wave filtering circuit, be connected with transformer, the first voltage output end Vout1 respectively, be used for one road direct voltage of transformer output is carried out rectifying and wave-filtering, then outwards export by the first voltage output end Vout1, described the first voltage output end Vout1 is connected with the first electric equipment;
The second current rectifying and wave filtering circuit, be connected with transformer, second voltage output end vo ut2 respectively, be used for another road direct voltage of transformer output is carried out rectifying and wave-filtering, then outwards export by second voltage output end vo ut2, described second voltage output end vo ut2 is connected with the second electric equipment.
Wherein, described voltage device comprises a primary voltage input and two secondary voltage outputs, described primary voltage input is connected with the voltage output end of pulse-width modulation circuit, and two secondary voltage outputs of described voltage device are connected with the second current rectifying and wave filtering circuit 2 with the first current rectifying and wave filtering circuit respectively.
Wherein, described the first voltage output end Vout1 and second voltage output end vo ut2 difference ground connection.
Wherein, also include:
Main feedback loop, respectively with pulse-width modulation circuit, the first voltage output end Vout1 is connected with second voltage output end vo ut2, be used for detecting in real time the output voltage size of described the first voltage output end Vout1 and second voltage output end vo ut2, when the output voltage of described the first voltage output end Vout1 and/or second voltage output end vo ut2 surpasses the first predeterminated voltage threshold values, send control signal to pulse-width modulation circuit accordingly, adjust the output voltage of pulse-width modulation circuit, realize that corresponding control reduces the output voltage of the first voltage output end Vout1 and/or second voltage output end vo ut2.
Wherein, described main feedback loop comprises: the first integrated circuit die I C1 and the second integrated circuit die I C2, and the stitch 4 of described the first integrated circuit die I C1 is connected with the voltage output end of pulse-width modulation circuit 104 respectively with stitch 3;
The stitch 3 of described the first integrated circuit die I C1 joins by the stitch 3 of a capacitor C 1 and described the second integrated circuit die I C2, stitch 3 ground connection of described the second integrated circuit die I C2;
The stitch 1 of described the first integrated circuit die I C1 is connecting resistance R1 and resistance R 2 respectively, and described resistance R 1 is joined with second voltage output end vo ut2;
The stitch 2 difference connecting resistance R2 of described the first integrated circuit die I C1 and the stitch 2 of the second integrated circuit die I C2 are connected with a capacitor C 2 by a resistance R 3 between the stitch 2 of described the second integrated circuit die I C2 and the stitch 1 successively;
The stitch 1 of described the second integrated circuit die I C2 also is connected with resistance R 6, resistance R 8 and resistance R 9 respectively, described resistance R 6 is joined with second voltage output end vo ut2 by resistance R 5, described resistance R 8 is joined by resistance R 7 and the first voltage output end Vout1, described resistance R 9 ground connection;
Wherein, also include:
The first current foldback circuit is arranged between described the first voltage output end Vout1 and the first current rectifying and wave filtering circuit;
The second current foldback circuit is arranged between described second voltage output end vo ut2 and the second current rectifying and wave filtering circuit;
Comprise respectively at least one over-current protection device in described the first current foldback circuit and the second current foldback circuit.
Wherein, described over-current protection device is fuse.
Wherein, also comprise:
The first control loop is arranged between described the first current foldback circuit and the first voltage output end Vout1, is used for output voltage stabilization with the first voltage output end Vout1 in the second predeterminated voltage threshold values;
The second control loop is arranged between described the second current foldback circuit and the second voltage output end vo ut2, is used for output voltage stabilization with second voltage output end vo ut2 in the second predeterminated voltage threshold values.
Wherein, described the first control loop includes:
The 3rd integrated circuit die I C3 and the 4th integrated circuit die I C4, the stitch 1 of the 3rd integrated circuit die I C3 is the stitch 1 of connecting resistance R10, resistance R 11 and the 4th integrated circuit die I C4 respectively, described resistance R 10 is connected with voltage output end, the first voltage output end Vout1 of the first current foldback circuit respectively, described resistance R 11 is joined with the stitch 3 of described the 3rd integrated circuit die I C3, the stitch 3 of the 4th integrated circuit die I C4 respectively, stitch 3 ground connection of the stitch 3 of described the 3rd integrated circuit die I C3 and the 4th integrated circuit die I C4;
The stitch 2 of described the 3rd integrated circuit die I C3 is the stitch 2 of connecting resistance R13, resistance R 12 and the 4th integrated circuit die I C4 respectively; described resistance R 13 is connected with voltage output end, the first voltage output end Vout1 of the first current foldback circuit respectively, and described resistance R 12 is connected with voltage output end, the first voltage output end Vout1 of the first current foldback circuit respectively.
Wherein, described the second control loop includes: the 5th integrated circuit die I C5 and the 6th integrated circuit die I C6, the stitch 1 of the 5th integrated circuit die I C5 is connecting resistance R100 respectively, the stitch 1 of resistance R 110 and the 6th integrated circuit die I C6, described resistance R 100 respectively with the voltage output end of the second current foldback circuit, second voltage output end vo ut2 is connected, described resistance R 110 respectively with the stitch 3 of described the 5th integrated circuit die I C5, the stitch 3 of the 6th integrated circuit die I C6 joins, stitch 3 ground connection of the stitch 3 of described the 5th integrated circuit die I C5 and the 6th integrated circuit die I C6;
The stitch 2 of described the 5th integrated circuit die I C5 is the stitch 2 of connecting resistance R130, resistance R 120 and the 6th integrated circuit die I C6 respectively; described resistance R 130 is connected with voltage output end, the second voltage output end vo ut2 of the second current foldback circuit respectively, and described resistance R 120 is connected with voltage output end, the second voltage output end vo ut2 of the second current foldback circuit respectively.
By above technical scheme provided by the invention as seen, compared with prior art, the invention provides a kind of power supply adaptor, it can realize that two-way voltage independently exports, can satisfy the normal operation needs of two electric equipments, thereby save user's adapter purchase cost and the interior space of user's preciousness, the product that significantly strengthens the user uses impression, is of great practical significance.
Description of drawings
Fig. 1 is the block diagram of a kind of power supply adaptor provided by the invention;
Fig. 2 is the block diagram of a kind of power supply adaptor embodiment one provided by the invention;
Fig. 3 is the physical circuit figure of primary feedback loop circuit among a kind of power supply adaptor embodiment one provided by the invention;
The block diagram of Fig. 4 a kind of power supply adaptor embodiment two provided by the invention;
The block diagram of Fig. 5 a kind of power supply adaptor embodiment three provided by the invention;
The physical circuit figure of the first control loop among Fig. 6 a kind of power supply adaptor embodiment three provided by the invention;
The physical circuit figure of the second control loop among Fig. 7 a kind of power supply adaptor embodiment three provided by the invention.
Embodiment
In order to make those skilled in the art person understand better the present invention program, the present invention is described in further detail below in conjunction with drawings and embodiments.
Referring to Fig. 1, the invention provides a kind of power supply adaptor, comprising:
Electromagnetic interference filter circuit 102, be connected with ac input circuit 101, for the alternating voltage filtering electromagnetic interference that ac input circuit 101 is exported, be specially conducted interference and the radiated interference of filtering electromagnetic interference, then export to current rectifying and wave filtering circuit 103;
Current rectifying and wave filtering circuit 103 is connected with electromagnetic interference filter circuit 102, is used for the alternating voltage of electromagnetic interference filter circuit 102 outputs is boosted and rectification, forms direct voltage, then exports to pulse-width modulation circuit 104 after filtering;
Pulse-width modulation circuit 104 is connected with current rectifying and wave filtering circuit 103, is used for the direct voltage of current rectifying and wave filtering circuit 103 outputs is carried out pulse width modulation, forms the direct voltage of predeterminated frequency scope, then exports to transformer 105;
The first current rectifying and wave filtering circuit 1061, be connected with transformer 105, the first voltage output end Vout1 respectively, be used for one road direct voltage of transformer 105 outputs is carried out rectifying and wave-filtering, then outwards export by the first voltage output end Vout1, described the first voltage output end Vout1 is connected with the first electric equipment;
The second current rectifying and wave filtering circuit 1062, be connected with transformer 105, second voltage output end vo ut2 respectively, be used for another road direct voltage of transformer 105 outputs is carried out rectifying and wave-filtering, then outwards export by second voltage output end vo ut2, described second voltage output end vo ut2 is connected with the second electric equipment.
For the present invention, on the specific implementation, described voltage device 105 comprises a primary voltage input and two secondary voltage outputs, described primary voltage input is connected with the voltage output end of pulse-width modulation circuit 104, and two secondary voltage outputs of described voltage device are connected with the second current rectifying and wave filtering circuit 1062 with the first current rectifying and wave filtering circuit 1061 respectively.
Therefore, technical scheme based on the invention described above, the doubleway output winding construction that power supply adaptor of the present invention can have by transformer, can the doubleway output direct voltage, and by described the first current rectifying and wave filtering circuit 1061 and the second current rectifying and wave filtering circuit 1062, guarantee the stable output of two-way direct voltage, can be stably provide the work electricity consumption for the first electric equipment and the second electric equipment.
In the present invention, described the first voltage output end Vout1 and second voltage output end vo ut2 be ground connection respectively, their ground wire is independently to separate, thereby can avoid the interference of ground wire noise between the first electric equipment and the second electric equipment, avoid the interference interference of display display frame (for example to) to electric device working state.
In the present invention, described the first electric equipment and the second electric equipment can be any electric equipments such as mobile phone, panel computer, display.In the present invention, described the first electric equipment and the second electric equipment are preferably display.
Participate in Fig. 2, in order further to stablize the output voltage of described the first voltage output end Vout1 and second voltage output end vo ut2, damage the first electric equipment and the second electric equipment when preventing voltage generation acute variation, power supply adaptor provided by the invention also includes:
On the specific implementation, referring to Fig. 3, described main feedback loop 108 comprises: the first integrated circuit die I C1 and the second integrated circuit die I C2, and the stitch 4 of described the first integrated circuit die I C1 is connected with the voltage output end of pulse-width modulation circuit 104 respectively with stitch 3;
The stitch 3 of described the first integrated circuit die I C1 joins by the stitch 3 of a capacitor C 1 and described the second integrated circuit die I C2, stitch 3 ground connection of described the second integrated circuit die I C2;
The stitch 1 of described the first integrated circuit die I C1 is connecting resistance R1 and resistance R 2 respectively, and described resistance R 1 is joined with second voltage output end vo ut2;
The stitch 2 difference connecting resistance R2 of described the first integrated circuit die I C1 and the stitch 2 of the second integrated circuit die I C2 are connected with a capacitor C 2 by a resistance R 3 between the stitch 2 of described the second integrated circuit die I C2 and the stitch 1 successively;
The stitch 1 of described the second integrated circuit die I C2 also is connected with resistance R 6, resistance R 8 and resistance R 9 respectively, described resistance R 6 is joined with second voltage output end vo ut2 by resistance R 5, described resistance R 8 is joined by resistance R 7 and the first voltage output end Vout1, described resistance R 9 ground connection.
Need to prove, for the first integrated circuit die I C1, on the specific implementation, it can be optical coupler, the light-emitting diode that is used for by wherein is converted to light signal to the signal of telecommunication of input, then passes to photosensitively to be converted to signal of telecommunication output, because not directly electrical connection, this both coupled transfer signal, the effect that has again isolation to disturb.In described the first integrated circuit die I C1, described stitch 1 is that light-emitting diode is anodal, and described stitch 2 is the light-emitting diode negative pole, and described stitch 3 is photosensitive semiconductor pipe emitter, and described stitch 4 is the photosensitive semiconductor pipe collector.
Also need to prove, for the second integrated circuit die I C2, on the specific implementation, it can be error amplifier, is used for the precision of relatively controlling Voltage-output by sampled voltage, and stitch 1 wherein is reference edge, and stitch 2 is negative electrode, and stitch 3 is anode.
Need to prove, for described main feedback loop 108, in order to guarantee the output voltage stabilization of the first voltage output end Vout1 and/or second voltage output end vo ut2, when the output voltage of described the first voltage output end Vout1 is positioned at normally (not surpassing the first predeterminated voltage threshold values), and second voltage output end vo ut2 is when too high (surpassing the first predeterminated voltage threshold values), by the divider resistance R5 among Fig. 3, the voltage signal of R6 and R9 feedback, control pulse-width modulation circuit 104 and adjust output voltage, reduce the output voltage of pulse-width modulation circuit 104, thereby realize reducing the output voltage of the first voltage output end Vout1 and second voltage output end vo ut2, so that they are no more than the first predeterminated voltage threshold values, be stabilized within the voltage deviation scope of a permission.
In like manner, if the output voltage of described second voltage output end vo ut2 is positioned at normally (not surpassing the first predeterminated voltage threshold values), and the first voltage output end Vout1 is when too high (surpassing the first predeterminated voltage threshold values), by the divider resistance R7 among Fig. 3, the voltage signal of R8 and R9 feedback, control pulse-width modulation circuit 104 and adjust output voltage, reduce the output voltage of pulse-width modulation circuit 104, thereby realize reducing the output voltage of the first voltage output end Vout1 and second voltage output end vo ut2, so that they are no more than the first predeterminated voltage threshold values, be stabilized within the voltage deviation scope of a permission.
Referring to Fig. 4, for the present invention, in order to realize that power supply adaptor provided by the invention also includes to the overcurrent protection of the first electric equipment and the second electric equipment:
The first overcurrent protection (OCP) circuit 1081 is arranged between described the first voltage output end Vout1 and the first current rectifying and wave filtering circuit 1061;
The second current foldback circuit 1082 is arranged between described second voltage output end vo ut2 and the second current rectifying and wave filtering circuit 1062.
In the present invention; on the specific implementation; can comprise respectively at least one fuse in described the first current foldback circuit 1081 and the second current foldback circuit 1082, the overcurrent protection effect that act as that described fuse plays in circuit can also be other over-current protection device certainly.
In addition, referring to Fig. 5, in order further to guarantee the precision of the output voltage of the first voltage output end Vout1 and second voltage output end vo ut2, power supply adaptor provided by the invention also includes:
The first control loop 1091 is arranged between described the first overcurrent protection (OCP) circuit 1081 and the first voltage output end Vout1, is used for output voltage stabilization with the first voltage output end Vout1 in the second predeterminated voltage threshold values;
The second control loop 1092 is arranged between described the second current foldback circuit 1082 and the second voltage output end vo ut2, is used for output voltage stabilization with second voltage output end vo ut2 in the second predeterminated voltage threshold values.
Referring to Fig. 6, on the specific implementation, described the first control loop 1091 includes:
The 3rd integrated circuit die I C3 and the 4th integrated circuit die I C4, the stitch 1 of the 3rd integrated circuit die I C3 is the stitch 1 of connecting resistance R10, resistance R 11 and the 4th integrated circuit die I C4 respectively, described resistance R 10 is connected with voltage output end, the first voltage output end Vout1 of the first overcurrent protection (OCP) circuit 1081 respectively, described resistance R 11 is joined with the stitch 3 of described the 3rd integrated circuit die I C3, the stitch 3 of the 4th integrated circuit die I C4 respectively, stitch 3 ground connection of the stitch 3 of described the 3rd integrated circuit die I C3 and the 4th integrated circuit die I C4;
The stitch 2 of described the 3rd integrated circuit die I C3 is the stitch 2 of connecting resistance R13, resistance R 12 and the 4th integrated circuit die I C4 respectively; described resistance R 13 is connected with voltage output end, the first voltage output end Vout1 of the first overcurrent protection (OCP) circuit 1081 respectively, and described resistance R 12 is connected with voltage output end, the first voltage output end Vout1 of the first overcurrent protection (OCP) circuit 1081 respectively.
Referring to Fig. 7, on the specific implementation, described the second control loop 1092 includes: the 5th integrated circuit die I C5 and the 6th integrated circuit die I C6, the stitch 1 of the 5th integrated circuit die I C5 is connecting resistance R100 respectively, the stitch 1 of resistance R 110 and the 6th integrated circuit die I C6, described resistance R 100 respectively with the voltage output end of the second overcurrent protection (OCP) circuit 1082, second voltage output end vo ut2 is connected, described resistance R 110 respectively with the stitch 3 of described the 5th integrated circuit die I C5, the stitch 3 of the 6th integrated circuit die I C6 joins, stitch 3 ground connection of the stitch 3 of described the 5th integrated circuit die I C5 and the 6th integrated circuit die I C6;
The stitch 2 of described the 5th integrated circuit die I C5 is the stitch 2 of connecting resistance R130, resistance R 120 and the 6th integrated circuit die I C6 respectively; described resistance R 130 is connected with voltage output end, the second voltage output end vo ut2 of the second overcurrent protection (OCP) circuit 1082 respectively, and described resistance R 120 is connected with voltage output end, the second voltage output end vo ut2 of the second overcurrent protection (OCP) circuit 1082 respectively.
In the present invention, when the first electric equipment uses, and the second electric equipment is not when using, because the variation of load, in order accurately to control the output voltage of second voltage output end vo ut2, the scope that allows it fluctuate up and down is no more than 5%, by the second control loop, stablize the output voltage of second voltage output end vo ut2, make it to be stabilized in the critical field;
And the first electric equipment does not use, and the second electric equipment is when using, because the variation of load, in order accurately to control the output voltage of the first voltage output end Vout1, the scope that allows it fluctuate up and down is no more than 5%, by the first control loop, stablize the output voltage of the first voltage output end Vout1, make it to be stabilized in the critical field.
Need to prove, output accuracy in order to ensure the output voltage of the first voltage output end Vout1, for described the first control loop, if the output voltage of Vout1 is higher, so by divider resistance R10 and R11 sampling, so that the comparator conducting among the 3rd integrated circuit die I C3, then can be by setting the size of resistance R 13 and R12, the output voltage stabilization of Vout1 in the scope of setting.
In like manner, output accuracy in order to ensure the output voltage of second voltage output end vo ut2, for described the second control loop, if the output voltage of Vout2 is higher, so by divider resistance R100 and R110 sampling, so that the comparator conducting among the 5th integrated circuit die I C5, then can be by setting the size of resistance R 130 and R120, the output voltage stabilization of Vout2 in the scope of setting.
Need to prove, for the 3rd integrated circuit die I C3, the 4th integrated circuit die I C4, the 5th integrated circuit die I C5 and the 6th integrated circuit die I C6, on the specific implementation, they can be error amplifier, be used for the precision of relatively controlling Voltage-output by sampled voltage, stitch 1 wherein is reference edge, and stitch 2 is negative electrode, and stitch 3 is anode.
In sum, compared with prior art, a kind of power supply adaptor provided by the invention, it can realize that two-way voltage independently exports, can satisfy the normal operation needs of two electric equipments, thereby save user's adapter purchase cost and the interior space of user's preciousness, the product that significantly strengthens the user uses impression, is of great practical significance.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a power supply adaptor is characterized in that, comprising:
Ac input circuit is connected with external ac power source, receives the alternating voltage of external ac power source output, then exports to electromagnetic interference filter circuit;
Electromagnetic interference filter circuit is connected with ac input circuit, for the alternating voltage filtering electromagnetic interference that ac input circuit is exported, then exports to current rectifying and wave filtering circuit;
Current rectifying and wave filtering circuit is connected with electromagnetic interference filter circuit, is used for the alternating voltage of electromagnetic interference filter circuit output is boosted and rectification, forms direct voltage, then exports to pulse-width modulation circuit after filtering;
Pulse-width modulation circuit is connected with current rectifying and wave filtering circuit, is used for the direct voltage of current rectifying and wave filtering circuit output is carried out pulse width modulation, forms the direct voltage of predeterminated frequency scope, then exports to transformer;
Transformer is connected with pulse-width modulation circuit, is used for the direct voltage of pulse-width modulation circuit output is carried out the step-down processing, then tells two-way voltage and exports to respectively the first current rectifying and wave filtering circuit and the second current rectifying and wave filtering circuit;
The first current rectifying and wave filtering circuit, be connected with transformer, the first voltage output end Vout1 respectively, be used for one road direct voltage of transformer output is carried out rectifying and wave-filtering, then outwards export by the first voltage output end Vout1, described the first voltage output end Vout1 is connected with the first electric equipment;
The second current rectifying and wave filtering circuit, be connected with transformer, second voltage output end vo ut2 respectively, be used for another road direct voltage of transformer output is carried out rectifying and wave-filtering, then outwards export by second voltage output end vo ut2, described second voltage output end vo ut2 is connected with the second electric equipment.
2. power supply adaptor as claimed in claim 1, it is characterized in that, described voltage device comprises a primary voltage input and two secondary voltage outputs, described primary voltage input is connected with the voltage output end of pulse-width modulation circuit, and two secondary voltage outputs of described voltage device are connected with the second current rectifying and wave filtering circuit 2 with the first current rectifying and wave filtering circuit respectively.
3. power supply adaptor as claimed in claim 1 is characterized in that, described the first voltage output end Vout1 and second voltage output end vo ut2 be ground connection respectively.
4. power supply adaptor as claimed in claim 1 is characterized in that, also includes:
Main feedback loop, respectively with pulse-width modulation circuit, the first voltage output end Vout1 is connected with second voltage output end vo ut2, be used for detecting in real time the output voltage size of described the first voltage output end Vout1 and second voltage output end vo ut2, when the output voltage of described the first voltage output end Vout1 and/or second voltage output end vo ut2 surpasses the first predeterminated voltage threshold values, send control signal to pulse-width modulation circuit accordingly, adjust the output voltage of pulse-width modulation circuit, realize that corresponding control reduces the output voltage of the first voltage output end Vout1 and/or second voltage output end vo ut2.
5. power supply adaptor as claimed in claim 4, it is characterized in that, described main feedback loop comprises: the first integrated circuit die I C1 and the second integrated circuit die I C2, and the stitch 4 of described the first integrated circuit die I C1 is connected with the voltage output end of pulse-width modulation circuit 104 respectively with stitch 3;
The stitch 3 of described the first integrated circuit die I C1 joins by the stitch 3 of a capacitor C 1 and described the second integrated circuit die I C2, stitch 3 ground connection of described the second integrated circuit die I C2;
The stitch 1 of described the first integrated circuit die I C1 is connecting resistance R1 and resistance R 2 respectively, and described resistance R 1 is joined with second voltage output end vo ut2;
The stitch 2 difference connecting resistance R2 of described the first integrated circuit die I C1 and the stitch 2 of the second integrated circuit die I C2 are connected with a capacitor C 2 by a resistance R 3 between the stitch 2 of described the second integrated circuit die I C2 and the stitch 1 successively;
The stitch 1 of described the second integrated circuit die I C2 also is connected with resistance R 6, resistance R 8 and resistance R 9 respectively, described resistance R 6 is joined with second voltage output end vo ut2 by resistance R 5, described resistance R 8 is joined by resistance R 7 and the first voltage output end Vout1, described resistance R 9 ground connection.
6. such as each described power supply adaptor in the claim 1 to 5, it is characterized in that, also include:
The first current foldback circuit is arranged between described the first voltage output end Vout1 and the first current rectifying and wave filtering circuit;
The second current foldback circuit is arranged between described second voltage output end vo ut2 and the second current rectifying and wave filtering circuit;
Comprise respectively at least one over-current protection device in described the first current foldback circuit and the second current foldback circuit.
7. power supply adaptor as claimed in claim 6 is characterized in that, described over-current protection device is fuse.
8. power supply adaptor as claimed in claim 6 is characterized in that, also comprises:
The first control loop is arranged between described the first current foldback circuit and the first voltage output end Vout1, is used for output voltage stabilization with the first voltage output end Vout1 in the second predeterminated voltage threshold values;
The second control loop is arranged between described the second current foldback circuit and the second voltage output end vo ut2, is used for output voltage stabilization with second voltage output end vo ut2 in the second predeterminated voltage threshold values.
9. power supply adaptor as claimed in claim 8 is characterized in that, described the first control loop includes:
The 3rd integrated circuit die I C3 and the 4th integrated circuit die I C4, the stitch 1 of the 3rd integrated circuit die I C3 is the stitch 1 of connecting resistance R10, resistance R 11 and the 4th integrated circuit die I C4 respectively, described resistance R 10 is connected with voltage output end, the first voltage output end Vout1 of the first current foldback circuit respectively, described resistance R 11 is joined with the stitch 3 of described the 3rd integrated circuit die I C3, the stitch 3 of the 4th integrated circuit die I C4 respectively, stitch 3 ground connection of the stitch 3 of described the 3rd integrated circuit die I C3 and the 4th integrated circuit die I C4;
The stitch 2 of described the 3rd integrated circuit die I C3 is the stitch 2 of connecting resistance R13, resistance R 12 and the 4th integrated circuit die I C4 respectively; described resistance R 13 is connected with voltage output end, the first voltage output end Vout1 of the first current foldback circuit respectively, and described resistance R 12 is connected with voltage output end, the first voltage output end Vout1 of the first current foldback circuit respectively.
10. power supply adaptor as claimed in claim 8, it is characterized in that, described the second control loop includes: the 5th integrated circuit die I C5 and the 6th integrated circuit die I C6, the stitch 1 of the 5th integrated circuit die I C5 is connecting resistance R100 respectively, the stitch 1 of resistance R 110 and the 6th integrated circuit die I C6, described resistance R 100 respectively with the voltage output end of the second current foldback circuit, second voltage output end vo ut2 is connected, described resistance R 110 respectively with the stitch 3 of described the 5th integrated circuit die I C5, the stitch 3 of the 6th integrated circuit die I C6 joins, stitch 3 ground connection of the stitch 3 of described the 5th integrated circuit die I C5 and the 6th integrated circuit die I C6;
The stitch 2 of described the 5th integrated circuit die I C5 is the stitch 2 of connecting resistance R130, resistance R 120 and the 6th integrated circuit die I C6 respectively; described resistance R 130 is connected with voltage output end, the second voltage output end vo ut2 of the second current foldback circuit respectively, and described resistance R 120 is connected with voltage output end, the second voltage output end vo ut2 of the second current foldback circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105647625A CN103051211A (en) | 2012-12-24 | 2012-12-24 | Power adapter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105647625A CN103051211A (en) | 2012-12-24 | 2012-12-24 | Power adapter |
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| CN103051211A true CN103051211A (en) | 2013-04-17 |
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| CN2012105647625A Pending CN103051211A (en) | 2012-12-24 | 2012-12-24 | Power adapter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9641113B2 (en) | 2014-02-28 | 2017-05-02 | General Electric Company | System and method for controlling a power generation system based on PLL errors |
| CN109256967A (en) * | 2018-10-26 | 2019-01-22 | 佛山市华全电气照明有限公司 | The constant voltage power supply circuit that power stability exports when a kind of starting |
| CN113497564A (en) * | 2020-04-03 | 2021-10-12 | 台达电子企业管理（上海）有限公司 | Power adapter and control method thereof |
| WO2022007617A1 (en) * | 2020-07-10 | 2022-01-13 | Oppo广东移动通信有限公司 | Power adapter |
| US11616449B2 (en) | 2020-04-03 | 2023-03-28 | Delta Electronics (Shanghai) Co., Ltd | Power adapter |
| US11737219B2 (en) | 2020-04-03 | 2023-08-22 | Delta Electronics (Shanghai) Co., Ltd | Power adapter |
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| CN201306191Y (en) * | 2008-01-03 | 2009-09-09 | 中国矿业大学 | Mine audible-visual annunciator |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9641113B2 (en) | 2014-02-28 | 2017-05-02 | General Electric Company | System and method for controlling a power generation system based on PLL errors |
| CN109256967A (en) * | 2018-10-26 | 2019-01-22 | 佛山市华全电气照明有限公司 | The constant voltage power supply circuit that power stability exports when a kind of starting |
| CN109256967B (en) * | 2018-10-26 | 2024-03-19 | 佛山市华全电气照明有限公司 | Constant voltage power supply circuit for stable power output during starting |
| CN113497564A (en) * | 2020-04-03 | 2021-10-12 | 台达电子企业管理（上海）有限公司 | Power adapter and control method thereof |
| US11616449B2 (en) | 2020-04-03 | 2023-03-28 | Delta Electronics (Shanghai) Co., Ltd | Power adapter |
| US11711017B2 (en) | 2020-04-03 | 2023-07-25 | Delta Electronics (Shanghai) Co., Ltd | Adapter and control method thereof |
| CN113497564B (en) * | 2020-04-03 | 2023-08-18 | 台达电子企业管理（上海）有限公司 | Power adapter and control method thereof |
| US11737219B2 (en) | 2020-04-03 | 2023-08-22 | Delta Electronics (Shanghai) Co., Ltd | Power adapter |
| WO2022007617A1 (en) * | 2020-07-10 | 2022-01-13 | Oppo广东移动通信有限公司 | Power adapter |
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Application publication date: 20130417 |