CN117220476A - Switching power supply control circuit and power supply control method - Google Patents
Switching power supply control circuit and power supply control method Download PDFInfo
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- CN117220476A CN117220476A CN202311467617.XA CN202311467617A CN117220476A CN 117220476 A CN117220476 A CN 117220476A CN 202311467617 A CN202311467617 A CN 202311467617A CN 117220476 A CN117220476 A CN 117220476A
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Abstract
The invention relates to the field of power supply control of a switching power supply, and discloses a power supply control circuit and a power supply control method of the switching power supply, wherein the circuit comprises a switching power supply main circuit, an output detection circuit, a power supply output control module and a switching power supply circuit; the power supply output control module is respectively connected with the output detection circuit and the switching power supply circuit, and the output end of the switching power supply main circuit is respectively connected with the power supply output control module, the output detection circuit and the switching power supply circuit; the power supply output control module is used for generating a power supply control instruction based on the electric quantity information; the power supply circuit is used for controlling power supply according to the power supply control instruction. The invention improves the power supply precision of the switching power supply.
Description
Technical Field
The invention relates to the field of power supply control of a switching power supply, in particular to a power supply control circuit and a power supply control method of the switching power supply.
Background
The switching power supply is widely applied by virtue of the advantages of high efficiency, high reliability, small volume and the like, and is used more and more frequently in various fields, but the pursuit of the power supply effect of the switching power supply is followed, namely, the power supply of the switching power supply is required to be higher.
The traditional power supply method of the switch power supply is to supply power to electric equipment by selecting a corresponding power supply port, the power supply method of the switch power supply has great defects, the switch power supply has the problem that the actual voltage of the power supply port and the theoretical voltage have errors due to the influence of devices of the switch power supply, namely the power supply method of the switch power supply has errors due to the actual voltage of the power supply port and the theoretical voltage, and therefore the power supply precision of the switch power supply is not high.
Disclosure of Invention
The invention mainly aims to provide a power supply control circuit and a power supply control method of a switching power supply, aiming at the technical problem of how to improve the power supply precision of the switching power supply.
In order to achieve the above object, the present invention provides a switching power supply control circuit, which includes a switching power supply main circuit, an output detection circuit, a power supply output control module, and a switching power supply circuit;
The power supply output control module is respectively connected with the output detection circuit and the switching power supply circuit, and the output end of the switching power supply main circuit is respectively connected with the power supply output control module, the output detection circuit and the switching power supply circuit;
the power supply output control module is used for generating a power supply control instruction based on the electric quantity information; the power supply circuit is used for controlling power supply according to the power supply control instruction.
Optionally, the output end of the switching power supply main circuit comprises a plurality of identical output port units and output interfaces, and the switching power supply main circuit at least comprises an input rectifying and filtering circuit, a power conversion circuit and an output rectifying and filtering circuit, and the input interfaces, the input rectifying and filtering circuit, the power conversion circuit, the output rectifying and filtering circuit, the output port units and the output interfaces are sequentially connected;
the output interface is connected with the output detection circuit and the switching power supply circuit, and each output port unit is connected with the switching power supply circuit.
Optionally, the output port unit includes a first control switch and a second control switch, and an input end of each output port unit is connected with an output end of one voltage stabilizing chip of the output rectifying and filtering circuit;
the power output control module is respectively connected with the control end of the first control switch and the control end of the second control switch, the first end of the first control switch is connected with the input end of the output port unit, the second end of the first control switch is connected with the output interface, the first end of the second control switch is connected with the input end of the output port unit, and the second end of the second control switch is connected with the switching power supply circuit.
Optionally, the switching power supply circuit comprises a plurality of same super-charging capacitor power supply units which are connected in sequence, and the super-charging capacitor power supply unit comprises a super-charging capacitor, a first selection switch and a second selection switch;
the power output control module is respectively connected with the control end of the first selection switch and the control end of the second selection switch, the first input end of the first selection switch is connected with the second end of the second control switch in each output port unit, the second input end of the first selection switch is connected with the system power supply ground, the output end of the first selection switch is connected with the first end of the super charging capacitor, the second end of the super charging capacitor is connected with the power output control module and the input end of the second selection switch, the first output end of the second selection switch is connected with the input end of the next super charging capacitor power supply unit, and the second output end of the second selection switch is connected with the output end of the switching power supply circuit;
The super-charging capacitor power supply unit further comprises a short circuit control switch, the short circuit control switch is connected to two sides of the super-charging capacitor, and a control end of the short circuit control switch is connected with the power output control module.
Optionally, the super-charging capacitor power supply unit further includes a third control switch, a control end of the third control switch is connected with the power output control module, a first end of the third control switch is used as an input end of the super-charging capacitor power supply unit and is connected with a first output end of a second selection switch in the previous super-charging capacitor power supply unit, a second end of the third control switch is connected with an input end of the switching power supply circuit, and a third end of the third control switch is connected with a first end of the super-charging capacitor; when the super-charging capacitor power supply unit is the last super-charging capacitor power supply unit, the first output end of the second selection switch is suspended.
Optionally, the switching power supply control circuit further includes a series switch and a parallel selection switch that are disposed at the output interface, a first end of the series switch is connected with the output interface and a first end of the parallel selection switch, a second end of the series switch is connected with an output end of the switching power supply circuit and an external device, a second end of the parallel selection switch is connected with the system power ground, a third end of the parallel selection switch is connected with an input end of the switching power supply circuit, and the power output control module is connected with a control end of the series switch and a control end of the parallel selection switch;
The output detection circuit comprises a first voltage collector and a first current collector, the second end of the series switch is respectively connected with the input end of the first voltage collector and the input end of the first current collector, and the power supply output control module is connected with the output end of the first voltage collector and the output end of the first current collector.
Optionally, the switching power supply circuit further includes a multiple selection switch, a second voltage collector and a second current collector, the input end of the multiple selection switch is connected with the second end of the super charging capacitor in each super charging capacitor power supply unit, the output end of the multiple selection switch is connected with the input end of the second voltage collector and the input end of the second current collector, the power output control module is connected with the output end of the second voltage collector and the output end of the second current collector, and the control end of the multiple selection switch is connected with the power output control module.
Optionally, the power output control module comprises a single chip microcomputer control chip, and the single chip microcomputer control chip is provided with a first control port, a second control port, a third control port, a fourth control port, a first acquisition port, a second acquisition port, an output control port and a short circuit control port;
The first control port is respectively connected with the control end of the first control switch and the control end of the second control switch, the second control port is respectively connected with the control end of the first selection switch and the control end of the second selection switch, the third control port is respectively connected with the control end of the third control switch, the fourth control port is connected with the control end of the alternative selection switch, the first acquisition port is respectively connected with the output end of the first voltage acquisition device and the output end of the first current acquisition device, the second acquisition port is respectively connected with the output end of the second voltage acquisition device and the output end of the second current acquisition device, the short circuit control port is connected with the control end of the short circuit control switch, and the output control port is connected with the control end of the series switch and the control end of the parallel selection switch.
In addition, to achieve the above object, the present invention further provides a power supply control method applied to the switching power supply control circuit, the power supply control method including the steps of:
acquiring electric quantity information acquired by an output detection circuit; wherein the electric quantity information at least comprises voltage information and current information;
And generating a power supply control instruction according to the electric quantity information, and performing power supply control on a switching power supply circuit according to the power supply control instruction.
Optionally, the step of generating a power supply control command according to the power information includes:
acquiring input electric quantity standard information, and detecting whether the electric quantity information is matched with the electric quantity standard information; wherein, the electric quantity standard information at least comprises standard current and standard voltage;
if the electric quantity information is not matched with the electric quantity standard information, determining difference electric quantity information between the electric quantity information and the electric quantity standard information;
acquiring real-time electric quantity information of an acquired switching power supply circuit, and determining a target power supply capacitor based on the difference electric quantity information in the real-time electric quantity information;
determining a power supply type of the target power supply capacitor, and taking a conduction instruction of the target power supply capacitor as a power supply control instruction based on the power supply type;
the step of determining the target power supply capacitance based on the difference power information in the real-time power information comprises the following steps:
determining a difference value in the difference electric quantity information based on the electric quantity precision requirement in the electric quantity standard information, and determining a target power supply capacitor in the real-time electric quantity information based on the difference value; the real-time electric quantity information refers to electric quantity information of each capacitor in the switching power supply circuit, and the target power supply capacitor refers to a combination of capacitors with the electric quantity information capable of compensating the difference value.
The invention provides a switching power supply control circuit, which comprises a switching power supply main circuit, an output detection circuit, a power supply output control module and a switching power supply circuit, wherein the switching power supply main circuit is connected with the output detection circuit; the power supply output control module is respectively connected with the output detection circuit and the switching power supply circuit, and the output end of the switching power supply main circuit is respectively connected with the power supply output control module, the output detection circuit and the switching power supply circuit; the power supply output control module is used for generating a power supply control instruction based on the electric quantity information; the power supply circuit is used for controlling power supply according to the power supply control instruction. The power supply control instruction is generated based on the power information by collecting the power information of the output end of the switching power supply main circuit, and finally the switching power supply main circuit can be subjected to power supply control based on the power supply control instruction. Therefore, the phenomenon that in the prior art, the actual voltage of the power supply port and the theoretical voltage have errors due to the influence of devices of the switch power supply is avoided, and the switch power supply control circuit not only can collect the electric quantity information of the output end of the switch power supply main circuit and monitor the output of the switch power supply control circuit, but also can generate a power supply control instruction to control the power supply of the switch power supply circuit based on the electric quantity information, so that the output accuracy is ensured to improve the power supply precision of the switch power supply.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a switching power supply control circuit according to the present invention;
FIG. 2 is a schematic diagram of the connection of a switching power supply main circuit in the switching power supply control circuit of the present invention;
FIG. 3 is a schematic diagram of a connection of a switching power supply circuit in the switching power supply control circuit according to the present invention;
FIG. 4 is a schematic diagram showing the internal connection of a power output control module in the switching power supply control circuit of the present invention;
fig. 5 is a flowchart of a first embodiment of the power supply control method of the present invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
For clarity and brevity of description of the following embodiments, a brief description of a switching power supply control circuit is first given:
The switching power supply control is widely applied to the industrial field by virtue of the advantages of high efficiency, high reliability, small volume and the like. The actual voltage and the theoretical voltage have errors due to the influences of the voltage division and the current division of the internal devices and the heating of the devices, namely the theoretical output voltage is 5V, the actual output voltage is 4.8V due to the influences of the internal devices, the influence on equipment with low voltage precision requirements is probably avoided, and the influence on equipment with high voltage precision requirements is larger, so that the switching power supply control circuit provided by the application is provided based on the problems to ensure the power supply voltage precision.
The scheme provides a switching power supply control circuit which comprises a switching power supply main circuit, an output detection circuit, a power supply output control module and a switching power supply circuit; the power supply output control module is respectively connected with the output detection circuit and the switching power supply circuit, and the output end of the switching power supply main circuit is respectively connected with the power supply output control module, the output detection circuit and the switching power supply circuit; the power supply output control module is used for generating a power supply control instruction based on the electric quantity information; the power supply circuit is used for controlling power supply according to the power supply control instruction. The power supply control instruction is generated based on the power information by collecting the power information of the output end of the switching power supply main circuit, and finally the switching power supply main circuit can be subjected to power supply control based on the power supply control instruction. Therefore, the phenomenon that in the prior art, the actual voltage of the power supply port and the theoretical voltage have errors due to the influence of devices of the switch power supply is avoided, and the switch power supply control circuit not only can collect the electric quantity information of the output end of the switch power supply main circuit and monitor the output of the switch power supply control circuit, but also can generate a power supply control instruction to control the power supply of the switch power supply circuit based on the electric quantity information, so that the output accuracy is ensured to improve the power supply precision of the switch power supply.
The invention provides a switching power supply control circuit.
In an embodiment of the present invention, as shown in fig. 1, fig. 1 is a schematic structural diagram of a switching power supply control circuit, where the switching power supply control circuit includes a switching power supply main circuit 10, an output detection circuit 20, a power supply output control module 30 and a switching power supply circuit 40;
the power output control module 30 is respectively connected with the output detection circuit 20 and the switch power supply circuit 40, and the output end of the switch power supply main circuit 10 is respectively connected with the power output control module 30, the output detection circuit 20 and the switch power supply circuit 40;
the output detection circuit 20 is configured to collect power information of an output end of the switching power supply main circuit 10, and the power output control module 30 is configured to generate a power supply control instruction based on the power information; the power information at least includes voltage information and current information, and the switching power supply circuit 40 is configured to perform power supply control according to the power supply control command.
In this embodiment, by adding the output detection circuit 20, the power output control module 30 and the switching power supply circuit 40 to a normal switching power supply circuit, the output current or voltage (power information) of the switching power supply main circuit 10 can be detected by the output detection circuit 20, the detection result is further transmitted back to the power output control module 30, and finally, the detection result is judged by the power output control module 30, so that a power supply control instruction is generated, and finally, the switching power supply circuit 40 is subjected to power supply control based on the power supply control instruction. The power supply control command is a command for controlling the switching power supply circuit 40 to supply power, and mainly refers to a command for turning on an internal control switch to supply power to the capacitor access circuit.
For example, if the voltage required by the user is 5V and the voltage collected by the actual output detection circuit 20 is 4.8V, a voltage of 0.2V is selected for connection to the switching power supply circuit 40; if the voltage required by the user is 5V, and the voltage collected by the actual output detection circuit 20 is 5.8V, a smaller voltage output (e.g. 3V voltage output) is selected, and the switching power supply circuit 40 is controlled to compensate the voltage and output the voltage. And further, the output accuracy can be ensured to improve the power supply accuracy of the switching power supply.
Further, in still another embodiment of the switching power supply control circuit of the present application, referring to fig. 2, fig. 2 is a schematic connection diagram of a switching power supply main circuit in the switching power supply control circuit of the present application, an output end of the switching power supply main circuit 10 includes a plurality of identical output port units 15 (not shown in the drawing) and an output interface 16, the switching power supply main circuit 10 includes at least an input rectifying and filtering circuit 12, a power conversion circuit 13 and an output rectifying and filtering circuit 14, and the input interface 11, the input rectifying and filtering circuit 12, the power conversion circuit 13, the output rectifying and filtering circuit 14, each of the output port units 15 and the output interface 16 are sequentially connected;
The output interface 16 is connected to the output detection circuit 20 and the switching power supply circuit 40, and each of the output port units 15 is connected to the switching power supply circuit 40.
Specifically, the output port unit 15 (including the output port unit 1151-the output port unit N15N) includes a first control switch 15A-15M and a second control switch 15B-15N, and an input end of each of the output port units 15 is connected to an output end of one of the voltage stabilizing chips 141-14N of the output rectifying and filtering circuit 14;
the power output control module 30 is connected to the control end Ac-Mc of the first control switch and the control end Bc-Nc of the second control switch, the first end Aa-Ma of the first control switch is connected to the input end of the output port unit 15, the second end Ab-Mb of the first control switch is connected to the output interface 16, the first end Ba-Na of the second control switch is connected to the input end of the output port unit 15, and the second end Bb-Nb of the second control switch is connected to the switching power supply circuit 40.
In the present embodiment, the switching power supply main circuit 10 includes at least the input rectifying and filtering circuit 12, the power conversion circuit 13, and the output rectifying and filtering circuit 14, and may include other main circuits, which are not limited herein. Two input rectifying and filtering circuits 12, power conversion circuits 13 and output rectifying and filtering circuits 14 may be connected through two alternative selectors, for example, two input rectifying and filtering circuits 12 are connected with two input ends of a first alternative selector, an output end of the first alternative selector is connected with an input end of a second alternative selector, two output ends of the second alternative selector are connected with input ends of two power conversion circuits 13, an output end of the two power conversion circuits 13 is connected with an input end of a third alternative selector, an output end of the third alternative selector is connected with two output rectifying and filtering circuits 14, and a control end of the third alternative selector is connected with a power output control module 30, so that after a problem of which part is detected, the corresponding part can be replaced by directly controlling the alternative selector through the power output control module 30, and the work can be continuously realized. For example, when the alternating current is input, the input rectifying and filtering circuit 12 is a double pi type filtering circuit formed by three capacitors and one inductance coil, and when the direct current is input, the input rectifying and filtering circuit 12 is formed by a double pi type filtering circuit formed by two capacitors and one inductance coil, and a subsequent anti-surge circuit. The input rectifying and filtering circuit 12 for the ac input and the dc input is not limited to this. The power conversion circuit 13 is a power conversion circuit in a power supply control of a common switching power supply, and the output rectifying and filtering circuit 14 can be a forward type, a flyback type or a synchronous rectifying circuit. The above is a possibility of various circuits in the switching power supply main circuit 10.
The output end of the switching power supply main circuit 10 includes a plurality of identical output port units 15 (not shown) and output interfaces 16, that is, each output port of the switching power supply main circuit 10 is used as an output port unit 15, so that different output voltages can be controlled and selected, and the output port unit 15 is connected with the output interfaces 16, so that only the accuracy required by a user needs to be input, and the current or the voltage with the corresponding accuracy can be output at the output interfaces 16. Because the output port unit 15 (including the output port unit 1151-output port unit N15N) includes the first control switches 15A-15M and the second control switches 15B-15N, taking an output port of 5V and 3V as an example, when 5V voltage is needed, the first control switches 15A-15M are directly connected to the output interface 16 to output 5V voltage, and when 5V voltage is used, the 5V voltage can be connected to the capacitor in the switching power supply circuit 40 through the second control switches 15B-15N, so that the idle voltage output port can supply power to the capacitor in the switching power supply circuit 40, and further, a basis can be provided for supplying power to the capacitor in the subsequent switching power supply circuit 40, and because only a single voltage stabilizing chip (the voltage stabilizing chip is used for outputting power sources with different voltage values, such as N voltage stabilizing chips outputting N voltages) is needed to supply power, at this time, other non-working voltages can be randomly selected to supply power to the capacitor in the switching power supply circuit 40, and further, the normal working and the following functions of the whole switching power supply can be ensured.
Further, in still another embodiment of the switching power supply control circuit of the present application, referring to fig. 3, fig. 3 is a schematic diagram showing connection of a switching power supply circuit in the switching power supply control circuit of the present application, the switching power supply circuit 40 includes a plurality of same super-charging capacitor power supply units 41-4N connected in sequence, and the super-charging capacitor power supply units 41-4N include super-charging capacitors C1-Cn, first selection switches 4A-4M and second selection switches 4B-4N;
the power output control module 30 is respectively connected with the control end of the first selection switch 4A-4M and the control end of the second selection switch 4B-4N, the first input end of the first selection switch 4A-4M is connected with the second end Bb-Nb of the second control switch in each output port unit 15, the second input end of the first selection switch 4A-4M is connected with the system power ground, the output end of the first selection switch 4A-4M is connected with the first end of the super-charging capacitor C1-Cn, the second end of the super-charging capacitor C1-Cn is connected with the power output control module 30 and the input end of the second selection switch 4B-4N, the first output end of the second selection switch 4B-4N is connected with the input end of the next super-charging capacitor power supply unit, and the second output end of the second selection switch 4B-4N is connected with the output end 402 of the switch power supply circuit;
The super-charging capacitor power supply unit 41-4n further comprises a short-circuit control switch D1-Dn, the short-circuit control switch D1-Dn is connected to two sides of the super-charging capacitor C1-Cn, and a control end of the short-circuit control switch D1-Dn is connected with the power output control module 30.
Specifically, the super-charging capacitor power supply unit 41-4N further includes a third control switch K1-Kn, a control end of the third control switch K1-Kn is connected to the power output control module 30, a first end of the third control switch K1-Kn is used as an input end of the super-charging capacitor power supply unit and is connected to a first output end of a second selection switch 4B-4N in a previous super-charging capacitor power supply unit, a second end of the third control switch K1-Kn is connected to an input end 401 of the switching power supply circuit, and a third end of the third control switch K1-Kn is connected to a first end of the super-charging capacitor C1-Cn; when the super-charging capacitor power supply unit 41-4N is the first super-charging capacitor power supply unit 41, the first end of the third control switch K1-Kn is suspended, and when the super-charging capacitor power supply unit 41-4N is the last super-charging capacitor power supply unit 4N, the first output end of the second selection switch 4B-4N is suspended.
In this embodiment, the switching power supply circuit 40 includes a plurality of same super-charging capacitor power supply units 41-4N that are sequentially connected, and each super-charging capacitor power supply unit 41-4N includes a super-charging capacitor C1-Cn, a first selection switch 4A-4M, and a second selection switch 4B-4N, where, taking two super-charging capacitor power supply units as an example, the first selection switch 4A-4M refers to a first selection switch in the first super-charging capacitor power supply unit and a first selection switch in the second super-charging capacitor power supply unit. The first selector switch 4A-4M is used to select whether charging is needed, and the first selector switch 4A-4M is grounded, and the second selector switch 4B-4N is used to detect whether the super-capacitor is charged. The second selector switches 4B-4N and the third control switches K1-Kn may constitute a connection means for connecting the super-charging capacitor. Because the second end of the third control switches K1-Kn is connected with the input end 401 of the switching power supply circuit, the input end 401 of the whole switching power supply circuit in any super-charging capacitor can be selected, and then the second selection switches 4B-4N are sequentially connected with the subsequent super-charging capacitors to realize power supply of the super-charging capacitors. The second output end of the second selection switch 4B-4N and the output end 402 of the switch power supply circuit can select the input end 401 of the whole switch power supply circuit in any super-charging capacitor, so as to form the whole switch power supply circuit, and meanwhile, the short-circuit control switch D1-Dn can selectively skip the unnecessary super-charging capacitor, so that the required super-charging capacitor can be accurately selected for power supply, and the power supply precision can be ensured.
Further, in still another embodiment of the switching power supply control circuit of the present application, referring to fig. 4, fig. 4 is a schematic diagram illustrating internal connection of a power output control module in the switching power supply control circuit of the present application, the switching power supply control circuit further includes a series switch 50 and a parallel selection switch 60 disposed at the output interface 16, a first end of the series switch 50 is connected to the output interface 16 and a first end of the parallel selection switch 60, a second end of the series switch 50 is connected to an output end 402 of the switching power supply circuit and an external device 100, a second end of the parallel selection switch 60 is connected to the system power supply, a third end of the parallel selection switch 60 is connected to an input end 401 of the switching power supply circuit, and the power output control module 30 is connected to a control end of the series switch 50 and a control end of the parallel selection switch 60, respectively;
the output detection circuit 20 includes a first voltage collector 21 and a first current collector 22, a second end of the series switch 50 is connected to an input end of the first voltage collector 21 and an input end of the first current collector 22, and the power output control module 30 is connected to an output end of the first voltage collector 21 and an output end of the first current collector 22.
Specifically, the switching power supply circuit further includes a multiple-selection switch 70, a second voltage collector 71, and a second current collector 72, where an input end of the multiple-selection switch 70 is connected to a second end of the super-charging capacitor C1-Cn in each super-charging capacitor power supply unit 41-4n, an output end of the multiple-selection switch 70 is connected to an input end of the second voltage collector 71 and an input end of the second current collector 72, the power output control module 30 is connected to an output end of the second voltage collector 71 and an output end of the second current collector 72, and a control end of the multiple-selection switch 70 is connected to the power output control module 30.
Specifically, the power output control module 30 includes a single-chip microcomputer control chip, where a first control port 31, a second control port 32, a third control port 33, a fourth control port 34, a first acquisition port 35, a second acquisition port 36, an output control port 37 and a short-circuit control port 38 are provided on the single-chip microcomputer control chip;
the first control port 31 is connected to the control ends Ac-Mc and Bc-Nc of the first and second control switches, the second control port 32 is connected to the control ends of the first and second selection switches 4A-4M and 4B-4N, respectively, the third control port 33 is connected to the control ends of the third control switches K1-Kn, respectively, the fourth control port 34 is connected to the control end of the one-of-multiple selection switch 70, the first collection port 35 is connected to the output end of the first voltage collector 21 and the output end of the first current collector 22, respectively, the second collection port 36 is connected to the output end of the second voltage collector 71 and the output end of the second current collector 72, respectively, the short-circuit control port 38 is connected to the control ends of the short-circuit control switches D1-Dn, respectively, and the output control port 37 is connected to the control ends of the series switch 50 and the control end of the selection switch 60.
In this embodiment, the switching power supply control circuit further includes a series switch 50 and a parallel selection switch 60 disposed at the output interface 16, so that the entire switching power supply circuit can be connected in parallel to the circuit or connected in series to the circuit, thereby meeting the requirement of voltage precision or current precision. The output detection circuit 20 detects the voltage and the current output by the output interface 16 through the first voltage collector 21 and the first current collector 22, so as to realize power supply control, and the first voltage collector 21 may be connected in parallel between the output interface 16 and the ground. Meanwhile, the switching power supply circuit further comprises a multiple-choice selection switch 70, a second voltage collector 71 and a second current collector 72, so that each super-charging capacitor C1-Cn can be sequentially subjected to electric pinch polling, and the corresponding super-charging capacitor C1-Cn can be selected to supply power based on polling results and precision requirements, so that control over power supply precision can be realized.
The power output control module 30 includes a single chip microcomputer control chip, so that the whole period is quite short, and the operations of polling, detection, control and the like can be completed within 1 second. The first control port 31 is respectively connected with the control end Ac-Mc of the first control switch and the control end Bc-Nc of the second control switch, so that the first control switch and the second control switch can be controlled to be turned off, and a plurality of second control switches can be controlled simultaneously, if 6 control switches exist, the first control port 31 outputs 111110 (high is on and low is off), and only the 6 th second control switch is turned off, so that the second control switch realizes capacitor charging, and the first control switch realizes external charging; the second control port 32 is connected to the control terminals of the first selector switches 4A-4M and the control terminals of the second selector switches 4B-4N, respectively, as in the control logic above. Meanwhile, one port of the whole single chip microcomputer control chip is connected with the external input device, so that a voltage or current value is input into the external input device, power supply control is performed according to preset precision (for example, the precision is as low as 0.1V), the precision of power supply control can be further ensured, and meanwhile, the functionality of the switching power supply is improved.
Further, referring to fig. 5, a schematic flow chart of a first embodiment of the power supply control method of the present invention is provided based on an embodiment of the power supply control circuit of the switching power supply, where the power supply control method includes the steps of:
step S10, acquiring electric quantity information acquired by an output detection circuit; wherein the electric quantity information at least comprises voltage information and current information;
in this embodiment, the power supply control may be performed based on the power information by acquiring the power information acquired by the output detection circuit, where the power information includes at least voltage information and current information. Meanwhile, the working state at the moment can be obtained, and then when the switching power supply is powered on but not working, the voltage value of each capacitor in the switching power supply circuit 40 is collected, and then the capacitor with insufficient low voltage is charged. It should be noted that, at least, there are a plurality of capacitors with different voltage values in the super-charging capacitors C1-Cn, so that various required voltages can be matched.
And step S20, generating a power supply control instruction according to the electric quantity information, and performing power supply control on a switching power supply circuit according to the power supply control instruction.
In this embodiment, after obtaining the electric quantity information, a power supply control instruction is generated based on the electric quantity information, and finally the power supply control instruction can be used for controlling the power supply circuit of the switching power supply based on the power supply control instruction, where the power supply control instruction is an instruction for controlling the power supply circuit of the switching power supply to supply power, and is mainly an instruction for turning on an internal control switch to supply power to the capacitor access circuit, and taking a current precision requirement as an example, the power supply control instruction is generated through the electric quantity information and the current precision requirement, and then the electric quantity information detected by executing the power supply control instruction meets the current precision requirement. The detection precision is qualified, then the external equipment is accessed, and the detection is continuously carried out after the external equipment is accessed, and the detection can be controlled by a switch of the external equipment. The step of generating a power supply control instruction according to the electric quantity information comprises the following steps:
Step C21, acquiring input electric quantity standard information, and detecting whether the electric quantity information is matched with the electric quantity standard information or not; wherein, the electric quantity standard information at least comprises standard current and standard voltage;
step C22, if the electric quantity information is not matched with the electric quantity standard information, determining difference electric quantity information between the electric quantity information and the electric quantity standard information;
in this embodiment, by acquiring input electric quantity standard information and detecting whether the electric quantity information is matched with the electric quantity standard information; the electric quantity standard information at least comprises standard current and standard voltage, and when the electric quantity information is matched with the electric quantity standard information, the electric quantity standard information is directly output. When the electric quantity information is not matched with the electric quantity standard information, difference electric quantity information between the electric quantity information and the electric quantity standard information is determined, the difference electric quantity information is the numerical difference between the numerical value of the electric quantity information and the numerical value of the electric quantity standard information, the numerical value of the electric quantity standard information is 5V, the numerical value of the electric quantity information is 4.8V, the difference electric quantity information is 0.2V, and then power supply control can be performed based on the difference electric quantity information, so that the accuracy of power supply is guaranteed.
Step C23, acquiring real-time electric quantity information of an acquired switching power supply circuit, and determining a target power supply capacitor in the real-time electric quantity information based on the difference electric quantity information;
And step C24, determining the power supply type of the target power supply capacitor, and taking a conduction instruction of the target power supply capacitor as a power supply control instruction based on the power supply type.
In this embodiment, by acquiring the real-time power information of the collected switching power supply circuit, the target power supply capacitor may be determined according to the real-time power information based on the difference power information, and finally the power supply type of the target power supply capacitor may be determined, and the on command of the target power supply capacitor may be used as the power supply control command based on the power supply type. The real-time electric quantity information is the voltage information of each super power supply capacitor, and the output current can be determined due to the known capacitance value of the capacitor, and the whole switching power supply circuit can be connected into the voltage stabilizing circuit for voltage stabilization and then output, such as a BOOST voltage stabilizing circuit. The power supply type refers to current precision requirements or voltage precision requirements, and further power is supplied based on connecting a required target power supply capacitor in series or in parallel to an output interface. It should be noted that, when the differential power information is negative, the combination of the smaller power supply voltage (the smaller output voltage of the voltage stabilizing chip) and the power supply circuit of the switching power supply is reselected to supply power. The on instruction is an instruction for controlling the connection of the target power supply capacitor, so that power can be supplied based on the target power supply capacitor, the power supply accuracy of the switching power supply is guaranteed, and meanwhile, the power supply accuracy is guaranteed.
In yet another embodiment, the step of determining the target supply capacitance at the real-time power information based on the differential power information includes:
step C231, determining a difference value in the difference electric quantity information based on the electric quantity precision requirement in the electric quantity standard information, and determining a target power supply capacitor in the real-time electric quantity information based on the difference value; the real-time electric quantity information refers to electric quantity information of each capacitor in the switching power supply circuit, and the target power supply capacitor refers to a combination of capacitors with the electric quantity information capable of compensating the difference value.
In this embodiment, when determining the target power supply capacitance, determining a difference value in the difference power information according to a power accuracy requirement in the power standard information, and finally determining the target power supply capacitance based on the difference value in the real-time power information; the real-time electric quantity information refers to electric quantity information of each capacitor in the switch power supply circuit, the target power supply capacitor refers to a combination of capacitors, the electric quantity information can compensate the difference value, namely, the difference value is determined for selecting a random capacitor in the whole process, if the electric quantity precision requirement in the electric quantity standard information is voltage precision, then, whether one capacitor can be combined with other capacitors to achieve voltage required to be additionally provided is randomly selected, and at the moment, the other capacitors can be charged. It should be noted that, the difference value refers to a difference value between a capacitance electric quantity and difference electric quantity information, so as to determine whether an electric quantity value added with the capacitance electric quantity is found as the electric quantity value of the difference electric quantity information, and if the electric quantity value does not exist, the next capacitance electric quantity is judged. Because the capacitor is charged in the judging process, the difference electric quantity information can be ensured to be met. And further, the power supply accuracy of the switching power supply is ensured, and meanwhile, the power supply accuracy is ensured.
The invention also provides a switching power supply control device.
The device of the invention comprises: the power supply control device comprises a memory, a processor, a switching power supply control circuit in the power supply control method and a power supply control program which is stored in the memory and can run on the processor, wherein the power supply control program realizes the steps of the power supply control method when being executed by the processor.
The invention also provides a storage medium.
The storage medium of the present invention has stored thereon a power supply control program which, when executed by a processor, implements the steps of the power supply control method as described above.
The method implemented when the power supply control program running on the processor is executed may refer to various embodiments of the power supply control method of the present invention, which are not described herein again.
The invention also provides a power supply control device.
The power supply control device is used for loading a switching power supply control circuit, the switching power supply control at least comprises a circuit board mounting assembly and a switching power supply control shell, the circuit board of the switching power supply control circuit is fixedly arranged on the circuit board mounting assembly, and the circuit board mounting assembly is packaged in the switching power supply control shell.
In an embodiment of the present invention, the switch power supply control housing is configured to encapsulate the circuit board and the circuit, and the circuit board mounting assembly is a device for fixing the circuit board, and the input interface and the output interface of the circuit board are connected with the outside through the interface on the switch power supply control housing to realize the switch power supply control function.
In an embodiment of the present invention, all or part of the switching power supply control circuit is disposed on the switching power supply control housing and/or the circuit board, and the switching power supply control housing and/or the circuit board has the following embodiments:
in a first embodiment, all or part of the switching power supply control circuit is disposed on the circuit board. The circuit board is provided with a switching power supply main circuit, an output detection circuit, a power supply output control module and a switching power supply circuit in the switching power supply control circuit, the switching power supply control shell is provided with an input interface and an output interface in the switching power supply control circuit, and the circuit board is packaged in the switching power supply control shell;
in a second embodiment, a main circuit of a switching power supply in the switching power supply control circuit is arranged on the circuit board, an output detection circuit, a power output control module, a switching power supply circuit, an input interface and an output interface in the switching power supply control circuit are arranged on the switching power supply control housing, and the circuit board is packaged in the switching power supply control housing.
The circuit board may be packaged transversely with the switch power supply control housing, or may be packaged longitudinally, which is not limited herein. The above arrangement manner of the power supply control of the switching power supply may be set according to actual situations, or more or fewer devices may be used to encapsulate the power supply control circuit of the switching power supply in the power supply control housing of the switching power supply or other devices, which is not limited herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. The switching power supply control circuit is characterized by comprising a switching power supply main circuit, an output detection circuit, a power supply output control module and a switching power supply circuit;
the power supply output control module is respectively connected with the output detection circuit and the switching power supply circuit, and the output end of the switching power supply main circuit is respectively connected with the power supply output control module, the output detection circuit and the switching power supply circuit;
the power supply output control module is used for generating a power supply control instruction based on the electric quantity information; the power supply circuit is used for controlling power supply according to the power supply control instruction.
2. The switching power supply control circuit according to claim 1, wherein the output terminal of the switching power supply main circuit includes a plurality of identical output port units and output interfaces, and the switching power supply main circuit includes at least an input rectifying and filtering circuit, a power conversion circuit, and an output rectifying and filtering circuit;
The input interface, the input rectifying and filtering circuit, the power conversion circuit, the output rectifying and filtering circuit, the output port units and the output interface are sequentially connected;
the output interface is connected with the output detection circuit and the switching power supply circuit, and each output port unit is connected with the switching power supply circuit.
3. The switching power supply control circuit according to claim 2, wherein the output port unit includes a first control switch and a second control switch, and an input terminal of each of the output port units is connected to an output terminal of one of the voltage stabilizing chips of the output rectifying and filtering circuit;
the power output control module is respectively connected with the control end of the first control switch and the control end of the second control switch, the first end of the first control switch is connected with the input end of the output port unit, the second end of the first control switch is connected with the output interface, the first end of the second control switch is connected with the input end of the output port unit, and the second end of the second control switch is connected with the switching power supply circuit.
4. The switching power supply control circuit according to claim 3, wherein the switching power supply circuit comprises a plurality of same super-charging capacitor power supply units which are sequentially connected, and the super-charging capacitor power supply unit comprises a super-charging capacitor, a first selection switch and a second selection switch;
the power output control module is respectively connected with the control end of the first selection switch and the control end of the second selection switch, the first input end of the first selection switch is connected with the second end of the second control switch in each output port unit, the second input end of the first selection switch is connected with the system power supply ground, the output end of the first selection switch is connected with the first end of the super charging capacitor, the second end of the super charging capacitor is connected with the power output control module and the input end of the second selection switch, the first output end of the second selection switch is connected with the input end of the next super charging capacitor power supply unit, and the second output end of the second selection switch is connected with the output end of the switching power supply circuit;
the super-charging capacitor power supply unit further comprises a short circuit control switch, the short circuit control switch is connected to two sides of the super-charging capacitor, and a control end of the short circuit control switch is connected with the power output control module.
5. The switching power supply control circuit according to claim 4, wherein the super-charging capacitor power supply unit further comprises a third control switch, a control end of the third control switch is connected with the power supply output control module, a first end of the third control switch is used as an input end of the super-charging capacitor power supply unit and is connected with a first output end of a second selection switch in a previous super-charging capacitor power supply unit, a second end of the third control switch is connected with an input end of the switching power supply circuit, and a third end of the third control switch is connected with a first end of the super-charging capacitor; when the super-charging capacitor power supply unit is the last super-charging capacitor power supply unit, the first output end of the second selection switch is suspended.
6. The switching power supply control circuit according to claim 5, further comprising a series switch and a parallel selection switch disposed at the output interface, wherein a first end of the series switch is connected to the output interface and a first end of the parallel selection switch, a second end of the series switch is connected to an output end of the switching power supply circuit and an external device, a second end of the parallel selection switch is connected to the system power supply, a third end of the parallel selection switch is connected to an input end of the switching power supply circuit, and the power output control module is connected to a control end of the series switch and a control end of the parallel selection switch, respectively;
The output detection circuit comprises a first voltage collector and a first current collector, the second end of the series switch is respectively connected with the input end of the first voltage collector and the input end of the first current collector, and the power supply output control module is connected with the output end of the first voltage collector and the output end of the first current collector.
7. The switching power supply control circuit according to claim 6, further comprising a plurality of one-to-one selection switches, a second voltage collector and a second current collector, wherein the input ends of the plurality of one-to-one selection switches are respectively connected with the second ends of the super-charging capacitors in the super-charging capacitor power supply units, the output ends of the plurality of one-to-one selection switches are respectively connected with the input ends of the second voltage collector and the input ends of the second current collector, the power supply output control module is connected with the output ends of the second voltage collector and the output ends of the second current collector, and the control end of the plurality of one-to-one selection switches is connected with the power supply output control module.
8. The switching power supply control circuit according to claim 7, wherein the power supply output control module comprises a single-chip microcomputer control chip, and a first control port, a second control port, a third control port, a fourth control port, a first acquisition port, a second acquisition port, an output control port and a short-circuit control port are arranged on the single-chip microcomputer control chip;
The first control port is respectively connected with the control end of the first control switch and the control end of the second control switch, the second control port is respectively connected with the control end of the first selection switch and the control end of the second selection switch, the third control port is respectively connected with the control end of the third control switch, the fourth control port is connected with the control end of the alternative selection switch, the first acquisition port is respectively connected with the output end of the first voltage acquisition device and the output end of the first current acquisition device, the second acquisition port is respectively connected with the output end of the second voltage acquisition device and the output end of the second current acquisition device, the short circuit control port is connected with the control end of the short circuit control switch, and the output control port is connected with the control end of the series switch and the control end of the parallel selection switch.
9. A power supply control method, characterized in that the power supply control method is applied to the switching power supply control circuit of any one of claims 1 to 8, the power supply control method comprising the steps of:
acquiring electric quantity information acquired by an output detection circuit; wherein the electric quantity information at least comprises voltage information and current information;
And generating a power supply control instruction according to the electric quantity information, and performing power supply control on a switching power supply circuit according to the power supply control instruction.
10. The power supply control method according to claim 9, wherein the step of generating a power supply control instruction from the power amount information includes:
acquiring input electric quantity standard information, and detecting whether the electric quantity information is matched with the electric quantity standard information; wherein, the electric quantity standard information at least comprises standard current and standard voltage;
if the electric quantity information is not matched with the electric quantity standard information, determining difference electric quantity information between the electric quantity information and the electric quantity standard information;
acquiring real-time electric quantity information of an acquired switching power supply circuit, and determining a target power supply capacitor based on the difference electric quantity information in the real-time electric quantity information;
determining a power supply type of the target power supply capacitor, and taking a conduction instruction of the target power supply capacitor as a power supply control instruction based on the power supply type;
the step of determining the target power supply capacitance based on the difference power information in the real-time power information comprises the following steps:
determining a difference value in the difference electric quantity information based on the electric quantity precision requirement in the electric quantity standard information, and determining a target power supply capacitor in the real-time electric quantity information based on the difference value; the real-time electric quantity information refers to electric quantity information of each capacitor in the switching power supply circuit, and the target power supply capacitor refers to a combination of capacitors with the electric quantity information capable of compensating the difference value.
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