CN219535894U - Multi-output switching power supply and power supply system - Google Patents
Multi-output switching power supply and power supply system Download PDFInfo
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- CN219535894U CN219535894U CN202223358848.0U CN202223358848U CN219535894U CN 219535894 U CN219535894 U CN 219535894U CN 202223358848 U CN202223358848 U CN 202223358848U CN 219535894 U CN219535894 U CN 219535894U
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- 238000004146 energy storage Methods 0.000 claims description 45
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model provides a multi-output switching power supply and a power supply system, comprising: the input circuit and the output circuit comprise secondary windings of transformers and a plurality of voltage regulating output circuits, wherein each voltage regulating output circuit comprises a first output end and a second output end, the second output end of each voltage regulating output circuit is respectively connected with the second end of the secondary winding to serve as output ground voltage, the first output end of each voltage regulating output circuit is respectively connected with the first end of the secondary winding, and based on the output ground voltage, each voltage regulating output circuit respectively outputs voltages with different sizes and/or polarities at the first output end. According to the scheme, the output of the secondary winding of the transformer is regulated to be voltage output with different sizes and/or different polar types through the voltage regulating output circuit, and multiple paths of voltages can be output by only using one switching power supply, so that the effects of reducing the volume and the cost when a plurality of groups of power supply voltage systems adopt the switching power supplies for power supply are achieved.
Description
Technical Field
The disclosed embodiments of the present utility model relate to the field of power supply technology, and more particularly, to a multi-output switching power supply and a power supply system.
Background
The switching power supply has high conversion efficiency, and a system requiring multiple groups of power supply voltages at present usually adopts multiple switching power supplies for power supply.
However, when a plurality of switching power supplies are used for supplying power to a system requiring a plurality of groups of power supply voltages, the system has the problems of large volume and high cost.
Therefore, how to solve the problems of large volume and high cost caused by the adoption of a switching power supply for a plurality of groups of power supply voltage systems is a current urgent problem to be solved.
Disclosure of Invention
According to the embodiment of the utility model, the utility model provides a multi-output switching power supply and a power supply system, so that the effects of reducing the volume and the cost when a plurality of groups of power supply voltage systems are powered by the switching power supply are achieved.
According to a first aspect of the present utility model, a multi-output switching power supply is provided, comprising an input circuit, including a power supply, a primary winding of a transformer, and a switching circuit, wherein a first end of the primary winding is connected to a negative electrode of the power supply through the switching circuit, and a second end of the primary winding is connected to a positive electrode of the power supply; the output circuit comprises a secondary winding of the transformer and a plurality of voltage regulating output circuits, wherein each voltage regulating output circuit comprises a first output end and a second output end, the second output end of each voltage regulating output circuit is respectively connected with the second end of the secondary winding to serve as output ground voltage, the first output end of each voltage regulating output circuit is respectively connected with the first end of the secondary winding, and based on the output ground voltage, each voltage regulating output circuit is respectively used for outputting voltages with different magnitudes and/or polarities at the first output ends.
According to the scheme, the output of the secondary winding of the transformer is regulated to be voltage output with different sizes and/or different polar types through the voltage regulating output circuit, and multiple paths of voltages can be output by only using one switching power supply, so that the effects of reducing the volume and the cost when a plurality of groups of power supply voltage systems adopt the switching power supplies for power supply are achieved.
Wherein the output circuit includes: the first voltage regulating output circuit outputs a first output voltage at the first output end; the second voltage regulating output circuit outputs a second output voltage at the first output end of the second voltage regulating output circuit, wherein the second output voltage is different from the first output voltage; and the third voltage regulating output circuit outputs a third output voltage at the first output end of the third voltage regulating output circuit, wherein the polarity of the third output voltage is different from the polarities of the first output voltage and the second output voltage.
According to the scheme, the output of the secondary winding of the transformer is regulated to be different in size and/or different in polar type through the three voltage regulating output circuits, and multiple paths of voltages can be output by only using one switching power supply, so that the effects of reducing the volume and the cost when a plurality of groups of power supply voltage systems adopt the switching power supplies for power supply are achieved.
Wherein, first voltage regulation output circuit includes: the first unidirectional conducting element is connected between the first end of the secondary winding and the first output end of the first voltage regulating output circuit; the first energy storage element is connected between the second end of the secondary winding and the first output end of the first voltage regulating output circuit; wherein, in response to the output current of the first end of the secondary winding, the first unidirectional conduction element is conducted, the first output end of the first voltage regulating output circuit outputs the first output voltage, and the first energy storage element stores energy; the first unidirectional conducting element is turned off in response to the second end of the secondary winding outputting current, and the first energy storage element discharges stored energy.
According to the scheme, the first voltage regulating circuit can continuously output the first output voltage at the first output end of the first voltage regulating circuit through the first unidirectional conducting element and the first energy storage element.
Wherein, the second voltage regulation output circuit includes: the isolation element is connected between the first output end of the first voltage regulating output circuit and the first output end of the second voltage regulating output circuit; the boost circuit is connected between the first output end of the second voltage regulating output circuit and the secondary winding, supplies energy to the first output end of the second voltage regulating output circuit and charges the isolation element.
According to the scheme, the second voltage regulating output circuit can uninterruptedly output the second output voltage which is larger than the first output voltage at the first output end of the second voltage regulating output circuit through the isolation element and the booster circuit.
Wherein the booster circuit includes: the second unidirectional conduction element is connected between the second output end of the second voltage regulating output circuit and the first output end of the second voltage regulating output circuit; the second energy storage element is connected between the first output end of the second voltage regulating output circuit and the first end of the secondary winding; the second unidirectional conduction element is cut off when the first end of the secondary winding outputs current, and the second energy storage element outputs the second output voltage from the first output end of the second voltage regulating output circuit and charges the isolation element; the second unidirectional conduction element is conducted when the second end of the secondary winding outputs current, the secondary winding charges the second energy storage element, and the isolation element outputs the second output voltage from the first output end of the second voltage regulating output circuit.
According to the scheme, the second output voltage which is larger than the first output voltage is output at the first output end of the second voltage regulating output circuit through the voltage boosting circuit.
Wherein, the third voltage regulation output circuit includes: the third unidirectional conducting element is connected between the first output end of the third voltage regulating output circuit and the first end of the secondary winding; the third energy storage element is connected between the second end of the secondary winding and the first output end of the third voltage regulating output circuit; wherein, in response to the second end output current of the secondary winding, the third unidirectional conduction element is conducted, the first output end of the third voltage regulating output circuit outputs the third output voltage, and the third energy storage element stores energy; the third unidirectional conducting element is turned off in response to the output current at the first end of the secondary winding, and the third energy storage element releases stored energy.
In the above-described aspect, the third conducting element and the third energy storage element are used, and the third output voltage different from the first output voltage and the second output voltage in polarity type is output at the first output terminal of the third voltage regulating output circuit.
The switching circuit comprises a controllable switching tube and a control circuit, and the control circuit controls the on-off of the controllable switching tube.
According to the scheme, the output voltage of the voltage regulating output circuit can be regulated through the controllable switch tube and the control circuit, and the effect of controllable output is achieved.
Wherein, controllable switching tube includes: one of MOS tube, triode and IGBT.
By the aid of the scheme, the response speed of output adjustment can be improved.
The control circuit comprises a power supply circuit and a control chip, wherein the power supply circuit comprises an auxiliary winding, a fourth unidirectional conduction element and a fourth energy storage element, and the auxiliary winding is magnetically coupled with at least part of the primary winding; the first end of the auxiliary winding is connected to the power input end of the control chip through a fourth unidirectional conducting element, and the second end of the auxiliary winding is grounded; one end of the fourth energy storage element is grounded, and the other end of the fourth energy storage element is connected to the power input end of the control chip.
According to the scheme, the auxiliary winding and the transformer are coupled to supply power for the control chip, so that the energy of the power supply can be fully utilized, the size is further reduced, and the cost is reduced.
According to a second aspect of the present utility model, a multi-output power supply system is presented, comprising at least one multi-output switching power supply as described above.
By adopting the scheme, the effect of reducing the volume and the cost of the multi-group power supply voltage system when the switch power supply is adopted for supplying power is achieved.
Drawings
The utility model will be further described with reference to the accompanying drawings and embodiments, in which:
FIG. 1 is a schematic circuit diagram of a multi-output switching power supply and power supply system according to an embodiment of the present utility model;
fig. 2 is a schematic circuit diagram of a multi-output switching power supply and a power supply system according to another embodiment of the present utility model.
Detailed Description
In order to make the technical scheme of the present utility model better understood by those skilled in the art, the technical scheme of the present utility model will be further described in detail with reference to the accompanying drawings and the detailed description.
The utility model can be applied to occasions needing to use the multi-output power supply to provide multi-output power supply for different loads.
Referring to fig. 1, fig. 1 is a schematic circuit diagram of an embodiment of a multi-output switching power supply and a power supply system according to the present utility model; specifically, the multi-output switching power supply comprises an input circuit and an output circuit.
The input circuit comprises a power supply Vin, a primary winding Pa of a transformer T1 and a switch circuit. Specifically, a first end of the primary winding Pa is connected to a negative electrode of the power supply Vin through a switching circuit, and a second end of the primary winding Pa is connected to a positive electrode of the power supply Vin.
The output circuit comprises a secondary winding Pb of the transformer T1 and a plurality of voltage regulating output circuits. Each voltage regulating output circuit comprises a first output end O1 and a second output end O2, the second output end O2 of each voltage regulating output circuit is respectively connected with the second end of the secondary winding Pb to serve as output ground voltage, the first output end O1 of each voltage regulating output circuit is respectively connected with the first end of the secondary winding Pb, and based on the output ground voltage, each voltage regulating output circuit respectively outputs voltages with different sizes and/or different polarities at the first output end O1.
According to the scheme, the voltage regulation output circuit is used for regulating the output of the secondary winding Pb of the transformer T1 into voltage outputs with different sizes and/or different polar types, and only one switching power supply is used for outputting multiple paths of voltages, so that the effects of reducing the volume and the cost when a plurality of groups of power supply voltage systems adopt the switching power supplies for power supply are achieved.
The principle of the above scheme is briefly described below in connection with the circuit shown in fig. 1: the power supply Vin in the input circuit supplies power to the primary winding Pa of the transformer T1. The switching circuit can control a loop between the primary winding Pa of the transformer T1 and the power supply Vin to be turned on or off, so that the secondary winding Pb of the transformer T1 is controlled to be switched between a state of storing energy and a state of releasing energy; the first output end O1 of the voltage regulating output circuits is connected with the first end of the secondary winding Pb of the transformer T1, the second output end O2 is connected with the second end of the secondary winding Pb of the transformer T1 to serve as output ground voltage, and voltages with different magnitudes and/or polarities are output through the voltage regulating output circuits.
It should be noted that, in the embodiment of the present utility model, referring to fig. 2, the first end of the transformer T1 winding may be the same-name end (i.e. the end with the ". X" symbol on the transformer winding in fig. 2), and the second end may be the different-name end (i.e. the end without the ". X" symbol on the transformer winding in fig. 2); that is, the first output terminal of each voltage regulating output circuit is connected to the same-name terminal of the secondary winding Pb of the transformer T1, and the different-name terminal of the secondary winding Pb of the transformer is connected to the output ground voltage GND. The different name end of the primary winding Pa of the transformer is connected to a power supply, and the same name end is connected to a switching tube Q1.
In other possible embodiments, the first terminal of the transformer T1 may be a synonym terminal, and the second terminal may be a synonym terminal, that is, the first output terminal O1 of each voltage regulating output circuit is connected to the synonym terminal of the secondary winding of the transformer, and the synonym terminal of the secondary winding of the transformer is connected to the output ground voltage. The same-name end of the primary winding of the transformer is connected to a power supply, and the different-name end of the primary winding of the transformer is connected to a switching tube Q1.
Referring to fig. 2, fig. 2 is a schematic circuit diagram of a multi-output switching power supply and a power supply system according to another embodiment of the present utility model; in this embodiment, the circuit topology of the multi-output switching power supply is a flyback switching power supply structure; in other possible embodiments, the circuit topology of the multi-output switching power supply may be a forward power supply structure, a half-bridge switching power supply, a full-bridge switching power supply, an LLC switching power supply, a three-level topology, etc., and when the above circuit topology is adopted, a plurality of voltage-regulating output circuits may be used to realize that multiple different voltages are output at the output ends of the circuit topology, so when the above circuit topology is adopted to realize that multiple different voltages are output, it is within the scope of the disclosure of the present utility model, and any changes that do not need any creative labor by those skilled in the art when using the above different circuit topologies should also be considered as not exceeding the scope of the disclosure of the present utility model.
With continued reference to fig. 2, in some possible embodiments, the output circuit includes: a first voltage-regulating output circuit 10 outputting a first output voltage at a first output terminal V02 thereof; a second voltage-regulating output circuit 20 outputting a second output voltage at a first output terminal V01 thereof, wherein the second output voltage has a magnitude different from that of the first output voltage; the third voltage-regulating output circuit 30 outputs a third output voltage at its first output terminal V03, wherein the polarity of the third output voltage is different from the polarities of the first output voltage and the second output voltage.
In some possible embodiments, the first voltage regulating output circuit 10 includes a first unidirectional conducting element 11 and a first energy storage element 12. The first unidirectional conducting element 11 is connected between the first end of the secondary winding Pb and the first output end V02 of the first voltage regulating output circuit 10, and the first energy storage element 12 is connected between the second end of the secondary winding Pb and the first output end V02 of the first voltage regulating output circuit 10. Specifically, in response to the first end output current of the secondary winding Pb, the first unidirectional conductive element 11 is conductive, the first output terminal V02 of the first voltage regulating output circuit 10 outputs a first output voltage, and the first energy storage element 12 stores energy; in response to the second end output current of the secondary winding Pb, the first unidirectional conducting element 11 turns off, and the first energy storage element 12 releases the stored energy.
With continued reference to fig. 2, in one implementation scenario, the first unidirectional conducting element 11 may be a diode D3, and the first energy storage element 12 may be a capacitor C4. The positive electrode of the diode D3 is connected with the first end of the secondary winding Pb of the transformer T1, the negative electrode of the diode D3 is connected to the first output end V02 of the first voltage regulating output circuit 10 so as to be conducted when the first end of the secondary winding Pb of the transformer T1 outputs current, and the current output by the first end of the secondary winding Pb of the transformer T1 is output to a load from the first output end V02 of the first voltage regulating output circuit 10 and charges the capacitor C4; when the second terminal of the secondary winding Pb of the transformer T1 outputs a current, the diode D3 is turned off, and the capacitor C4 starts to output a voltage to the load via the first output terminal V02 of the first voltage regulating output circuit 10. In other implementations, the first unidirectional conducting element 11 may also be a controllable switching device, such as a triode, a field effect transistor, etc., which is turned on based on the output current of the first terminal of the secondary winding Pb of the transformer T1 and turned off based on the output current of the second terminal of the secondary winding Pb of the transformer T1. Therefore, when the first unidirectional conducting element 11 is a controllable switching device, any changes made by those skilled in the art according to the well-known switching principles of the controllable switching device without any inventive work on the circuit shown in fig. 2 should be considered as not exceeding the scope of the disclosure of the present utility model.
In some possible embodiments, the second voltage regulating output circuit 20 includes an isolation element 22 and a boost circuit 21. The isolation element 22 is connected between the first output terminal V02 of the first voltage regulating output circuit 10 and the first output terminal V01 of the second voltage regulating output circuit 20; the booster circuit 21 is connected between the first output terminal V01 of the second voltage regulating output circuit 20 and the secondary winding Pb, and supplies power to the first output terminal V01 of the second voltage regulating output circuit 20 and charges the isolation element 22.
With continued reference to fig. 2, in one implementation scenario, the isolation element 22 may be a capacitor C3; when the first end of the secondary winding Pb of the transformer T1 outputs current, the booster circuit 21 outputs current outwards, supplies power to the first output end V01 of the second voltage regulating output circuit 20 and charges the capacitor C3; when the second end of the secondary winding Pb of the transformer T1 outputs current, the boost circuit 21 stops outputting current outwards, the capacitor C3 releases the energy stored previously, and the voltage is output to the load through the first output end V01 of the second voltage regulating output circuit 20; in addition, due to the bootstrap effect of the capacitor C3, the second output voltage outputted at the first output terminal V01 of the second voltage regulating output circuit 20 is always higher than the first output voltage.
In one implementation scenario, the boost circuit 21 includes a second unidirectional conducting element 211 and a second energy storage element 212. The second unidirectional conducting element 211 is connected between the second output end of the second voltage regulating output circuit 20 and the first output end V01 of the second voltage regulating output circuit 20; the second energy storage element 212 is connected between the first output terminal V01 of the second voltage regulating output circuit 20 and the first terminal of the secondary winding Pb. Wherein the second unidirectional conducting element 211 is turned off when the first end of the secondary winding Pb outputs current, and the second energy storage element 212 outputs a second output voltage from the first output end V01 of the second voltage regulating output circuit 20 and charges the isolation element 22; the second unidirectional conduction element 211 is turned on when the second end of the secondary winding Pb outputs a current, the secondary winding Pb charges the second energy storage element 212, and the isolation element 22 outputs a second output voltage from the first output end V01 of the second voltage regulating output circuit 20.
Referring to fig. 2, in an implementation scenario, the second unidirectional conducting element 211 may be a diode D2, and the second energy storage element 212 may be a capacitor C2; one end of the capacitor C2 is connected to the first end of the secondary winding Pb of the transformer T1, the other end of the capacitor C2 is connected to the negative electrode of the diode D2, the positive electrode of the diode D2 is connected to the second end of the secondary winding Pb of the transformer T1, and the series point of the capacitor C2 and the diode D2 is connected to the first output end V01 of the second voltage regulating output circuit 20; when the second end of the secondary winding Pb of the transformer T1 outputs current, the diode D2 is conducted, and the capacitor C2 is charged; when the first end of the secondary winding Pb outputs current, the diode turns off and the capacitor C2 releases energy. In other implementations, the second unidirectional conductive element 211 may also be a controllable switching device, such as a triode, a field effect transistor, etc., which is turned off based on the output current of the first terminal of the secondary winding Pb of the transformer T1 and turned on based on the output current of the second terminal of the secondary winding Pb of the transformer T1. Therefore, when the second unidirectional conductive element 211 is a controllable switching device, any changes made by those skilled in the art according to the well-known switching principles of the controllable switching device without any inventive work on the circuit shown in fig. 2 should be considered as not exceeding the scope of the disclosure of the present utility model.
In other implementation scenarios, the boost circuit 21 may further include a power source and a controllable switching device, where the controllable switching device may be connected in series with the power source, and the controllable switching device is turned on based on the output current of the first end of the secondary winding Pb of the transformer T1, so that the power source outputs energy outwards to power the first output terminal V01 of the second voltage regulation output circuit 20 and to charge the isolation element 22; the controllable switching device is turned off based on the second end output current of the secondary winding Pb of the transformer T1, and the power supply stops outputting energy to the outside.
In some possible embodiments, the third voltage regulation output circuit 30 includes: a third unidirectional conductive element 31 connected between the first output terminal V03 of the third voltage regulating output circuit 30 and the first terminal of the secondary winding Pb; a third energy storage element 32 connected between the second end of the secondary winding Pb and the first output end V03 of the third voltage regulating output circuit 30; wherein, in response to the second end output current of the secondary winding Pb, the third unidirectional conductive element 31 is conductive, the first output end V03 of the third voltage regulating output circuit 30 outputs a third output voltage, and the third energy storage element 32 stores energy; in response to the output current at the first end of the secondary winding Pb, the third unidirectional conducting element 31 turns off and the third energy storage element 32 releases the stored energy.
Referring to fig. 2, in an implementation scenario, the third unidirectional conducting element 31 may be a diode D4, and the third energy storage element 32 may be a capacitor C5; the negative electrode of the diode D4 is connected to the first end of the secondary winding Pb, and the positive electrode of the diode D4 is connected to the first output end V03 of the third voltage regulating output circuit 30; one end of the capacitor C5 is connected to the first output end V03 of the third voltage regulating output circuit 30, and the other end of the capacitor C is connected to the second end of the secondary winding Pb of the transformer T1; when the second end of the secondary winding Pb of the transformer T1 outputs voltage, the diode D4 is conducted, and the capacitor C5 is charged; when the first terminal of the secondary winding Pb of the transformer T1 outputs a current, the diode D4 is turned off, the capacitor C5 starts to discharge energy, and since one terminal of the capacitor C5 is connected to the output ground voltage GND, the voltage of the other terminal thereof is limited to be lower than the output ground voltage, that is, the output voltage is lower than the ground voltage at the first output terminal V03 of the third voltage regulating output circuit 30, so that the third voltage regulating output circuit 30 outputs a third output voltage having a polarity opposite to that of the first output voltage.
In other embodiments, the third unidirectional conducting element 31 may also be a controllable switching device, such as a triode, a field effect transistor, etc., which is turned off based on the output current of the first terminal of the secondary winding Pb of the transformer T1 and turned on based on the output current of the second terminal of the secondary winding Pb of the transformer T1. Therefore, when the third unidirectional conducting element 31 is a controllable switching device, any changes made by those skilled in the art to the circuit shown in fig. 2 according to the well-known switching principle of the controllable switching device without any inventive work should be considered as not exceeding the scope of the disclosure of the present utility model.
In some possible embodiments, the switching circuit includes a controllable switching tube 40 and a control circuit 50, the control circuit 50 controls on/off of the controllable switching tube 40, and the output voltage of the voltage regulating output circuit can be regulated through the controllable switching tube 40 and the control circuit 50, so as to achieve the effect of controllable output.
In some possible embodiments, the controllable switch tube 40 includes one of a MOS tube, a triode, and an IGBT, in this embodiment, the controllable switch tube 40 is a MOS tube Q1, a control end of which is connected to the signal output end Vo of the control chip U1, and a control end of which is connected to the first end of the primary winding Pa of the transformer T1 and the ground end gnd of the control chip U1, respectively; in other embodiments, other controllable switching devices are also possible, which are capable of controlling the conduction between their controlled terminals based on the signal at their control terminals.
The control circuit 50 comprises a power supply circuit and a control chip U1, wherein the power supply circuit comprises an auxiliary winding Pc, a fourth unidirectional conduction element 51 and a fourth energy storage element 52, and the auxiliary winding Pc is magnetically coupled with at least part of the primary winding Pa; the first end of the auxiliary winding Pc is connected to the power input end of the control chip U1 through the fourth unidirectional conducting element 51, and the second end of the auxiliary winding Pc is grounded; one end of the fourth energy storage element 52 is grounded, and the other end is connected to the power input end of the control chip U1.
Referring to fig. 2, in one implementation scenario, the fourth unidirectional conducting element 51 and the fourth energy storage element 52 may be a diode D1 and a capacitor C1, respectively, wherein the anode of the diode D1 is connected to the first end of the auxiliary winding Pc, and the cathode of the diode D1 is connected to the power input end Vcc of the control chip U1; one end of the capacitor C1 is grounded, and the other end of the capacitor C1 is connected to the power input end Vcc of the control chip U1; when the first end of the auxiliary winding Pc outputs current, the diode D1 is conducted, and the auxiliary winding directly supplies power to the control chip U1 and charges the capacitor C1; when the second end of the auxiliary winding Pc outputs current, the diode D1 is turned off, and the capacitor C1 supplies power to the control chip U1. When the capacitor C1 supplies power, the control chip U1 controls the controllable switch tube 40 to be conducted, so that the first end of the primary winding Pa is conducted with the negative electrode of the power supply Vin.
In other implementation scenarios, the fourth unidirectional conducting element 51 may also be a controllable switching device, such as a triode, a field effect transistor, etc., which is turned on based on the first terminal output current of the auxiliary winding Pc of the transformer T1 and turned off based on the second terminal output current of the auxiliary winding Pc of the transformer T1. Therefore, when the fourth unidirectional conducting element 51 is a controllable switching device, any changes made by those skilled in the art to the circuit shown in fig. 2 according to the well-known switching principle of the controllable switching device without any inventive work should be considered as not exceeding the scope of the disclosure of the present utility model.
In other embodiments, each of the first voltage regulating output circuit 10, the second voltage regulating output circuit 20, and the third voltage regulating output circuit 30 may include a plurality of output paths, for example, in one implementation scenario, the first voltage regulating output circuit 10 may include a first output terminal, a second output terminal, and a third output terminal, the second output terminal is connected to the output ground voltage GND, and the first output terminal and the third output terminal are connected in parallel for supplying the load with the output voltage; in other implementation scenarios, the first voltage regulating output circuit 10 may further include a plurality of first unidirectional conductive elements, a plurality of first energy storage elements, and a plurality of first output ends, where the plurality of first unidirectional conductive elements are respectively connected between the first end of the secondary winding Pb and one first output end of the first voltage regulating output circuit 10, and the plurality of first energy storage elements are respectively connected between one first output end of the first voltage regulating output circuit and the second end of the secondary winding, so as to be capable of providing a plurality of first output voltages to the load; similarly, the second voltage regulating output circuit 20 and the third voltage regulating output circuit 30 may also be based on the design concept described above to provide a plurality of second output voltages and third output voltages, respectively, to the load.
According to a second aspect of the present utility model, a multiple output power supply system is disclosed, comprising at least one of any of the multiple output switching power supplies described above. Thus, in some disclosed embodiments, the multiple output power supply system may include one multiple output switching power supply as described above, or multiple output switching power supplies may be provided simultaneously to accommodate the need for more loads, which is not limited herein.
Those skilled in the art will readily appreciate that many modifications and variations are possible in the device and method while maintaining the teachings of the utility model. Accordingly, the above disclosure should be viewed as limited only by the scope of the appended claims.
Claims (10)
1. A multiple output switching power supply comprising:
the input circuit comprises a power supply, a primary winding of a transformer and a switch circuit, wherein a first end of the primary winding is connected to a negative electrode of the power supply through the switch circuit, and a second end of the primary winding is connected to a positive electrode of the power supply;
the output circuit comprises a secondary winding of the transformer and a plurality of voltage regulating output circuits, wherein each voltage regulating output circuit comprises a first output end and a second output end, the second output end of each voltage regulating output circuit is respectively connected with the second end of the secondary winding to serve as output ground voltage, the first output end of each voltage regulating output circuit is respectively connected with the first end of the secondary winding, and based on the output ground voltage, each voltage regulating output circuit is respectively used for outputting voltages with different magnitudes and/or polarities at the first output ends.
2. The multiple output switching power supply of claim 1 wherein said output circuit comprises:
the first voltage regulating output circuit outputs a first output voltage at the first output end;
the second voltage regulating output circuit outputs a second output voltage at the first output end of the second voltage regulating output circuit, wherein the second output voltage is different from the first output voltage;
and the third voltage regulating output circuit outputs a third output voltage at the first output end of the third voltage regulating output circuit, wherein the polarity of the third output voltage is different from the polarities of the first output voltage and the second output voltage.
3. The multiple output switching power supply of claim 2 wherein said first voltage regulating output circuit comprises:
the first unidirectional conducting element is connected between the first end of the secondary winding and the first output end of the first voltage regulating output circuit;
the first energy storage element is connected between the second end of the secondary winding and the first output end of the first voltage regulating output circuit;
wherein, in response to the output current of the first end of the secondary winding, the first unidirectional conduction element is conducted, the first output end of the first voltage regulating output circuit outputs the first output voltage, and the first energy storage element stores energy; the first unidirectional conducting element is turned off and the first energy storage element releases stored energy in response to the second end of the secondary winding outputting current.
4. A multiple output switching power supply as claimed in claim 3 wherein said second voltage regulating output circuit comprises:
the isolation element is connected between the first output end of the first voltage regulating output circuit and the first output end of the second voltage regulating output circuit;
the boost circuit is connected between the first output end of the second voltage regulating output circuit and the secondary winding, supplies energy to the first output end of the second voltage regulating output circuit and charges the isolation element.
5. The multiple output switching power supply of claim 4 wherein said boost circuit comprises:
the second unidirectional conduction element is connected between the second output end of the second voltage regulating output circuit and the first output end of the second voltage regulating output circuit;
the second energy storage element is connected between the first output end of the second voltage regulating output circuit and the first end of the secondary winding; the second unidirectional conduction element is cut off when the first end of the secondary winding outputs current, and the second energy storage element outputs the second output voltage from the first output end of the second voltage regulating output circuit and charges the isolation element; the second unidirectional conduction element is conducted when the second end of the secondary winding outputs current, the secondary winding charges the second energy storage element, and the isolation element outputs the second output voltage from the first output end of the second voltage regulating output circuit.
6. The multiple output switching power supply of claim 2 wherein said third voltage regulating output circuit comprises:
the third unidirectional conducting element is connected between the first output end of the third voltage regulating output circuit and the first end of the secondary winding;
the third energy storage element is connected between the second end of the secondary winding and the first output end of the third voltage regulating output circuit;
wherein, in response to the second end output current of the secondary winding, the third unidirectional conduction element is conducted, the first output end of the third voltage regulating output circuit outputs the third output voltage, and the third energy storage element stores energy; the third unidirectional conducting element is turned off in response to the output current at the first end of the secondary winding, and the third energy storage element releases stored energy.
7. The multi-output switching power supply of claim 1, wherein the switching circuit comprises a controllable switching tube and a control circuit, the control circuit controlling the on-off of the controllable switching tube.
8. The multiple output switching power supply of claim 7 wherein the controllable switching tube comprises: one of MOS tube, triode and IGBT.
9. The multiple-output switching power supply of claim 7 wherein the control circuit comprises a power supply circuit and a control chip, the power supply circuit comprising an auxiliary winding, a fourth unidirectional conducting element, and a fourth energy storage element, the auxiliary winding being magnetically coupled to at least a portion of the primary winding; the first end of the auxiliary winding is connected to the power input end of the control chip through a fourth unidirectional conducting element, and the second end of the auxiliary winding is grounded; one end of the fourth energy storage element is grounded, and the other end of the fourth energy storage element is connected to the power input end of the control chip.
10. A multiple output power supply system comprising at least one multiple output switching power supply as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223358848.0U CN219535894U (en) | 2022-12-13 | 2022-12-13 | Multi-output switching power supply and power supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223358848.0U CN219535894U (en) | 2022-12-13 | 2022-12-13 | Multi-output switching power supply and power supply system |
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| CN219535894U true CN219535894U (en) | 2023-08-15 |
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| CN202223358848.0U Active CN219535894U (en) | 2022-12-13 | 2022-12-13 | Multi-output switching power supply and power supply system |
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Effective date of registration: 20240102 Address after: Building 5, No. 50 North Guandu Road, Yuexi Street, Wuzhong District, Suzhou City, Jiangsu Province, 215100 (Building 9 of Science and Technology Industrial Park), East A Zone, 4th Floor Patentee after: SUZHOU ANCHI CONTROL SYSTEM Co.,Ltd. Address before: Room 401, building 5, No. 50, beiguandu Road, Yuexi street, Wuzhong District, Suzhou, Jiangsu 215000 Patentee before: Suzhou Shidai Xin'an Energy Technology Co.,Ltd. |
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