CN117240087A - Control method, device and system of single-input multi-output direct current-to-direct current circuit - Google Patents
Control method, device and system of single-input multi-output direct current-to-direct current circuit Download PDFInfo
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Abstract
The present application relates to the field of integrated circuits, and in particular, to a method, an apparatus, and a system for controlling a single-input multiple-output dc-dc circuit. The method comprises the following steps: acquiring charging signals of all charging signal output ends; the charging signal is used for representing whether the charging signal output end needs to be charged or not; determining a target phase value; the target phase value is the phase of a preset clock period; when the target phase value is in a first type of charging phase range, charging the single inductor through the driving module; and when the target phase value is in the second type of charging phase range, based on the target phase value and the charging signal, respectively charging each charging signal output end to be charged through the single inductor and the driving module according to a time division multiplexing principle.
Description
Technical Field
The application relates to the technical field of integrated circuits, in particular to a method, a device and a system for controlling single-input multi-output direct current to direct current.
Background
The existing single-input multi-output direct current-to-direct current circuit mainly adopts a multi-inductor design, and each output single is required to be matched with one inductor so as to realize different output voltages of multiple outputs. However, this design uses multiple inductors, especially when the output number is large, the number of inductors is significantly large.
Since the inductor cannot be integrated in the chip, especially the power inductor, only the device of the chip external inductor can be used, and these additional inductor devices can additionally increase the volume of the whole system, so that it cannot be applied to the tiny electronic equipment. Second, the additional inductive devices increase the material cost of the overall system, as the cost of the inductor is generally much higher than the capacitance and resistance. In addition, when the loads of the multiple outputs differ greatly, the low load output will waste most of the load carrying capacity of the inductor it uses. Because the connected inductance of each output needs to meet the maximum load demand, the load carrying capacity cannot be dynamically distributed among the outputs.
Disclosure of Invention
In view of this, the present application provides a method and apparatus for controlling single input multiple output dc to dc, so as to solve the problem that the load capacity is wasted greatly caused by the fact that the number of applied inductors is large and the used inductors cannot dynamically allocate the load capacity.
According to a first aspect of the embodiment of the application, a control method of a single-input multi-output direct current-to-direct current circuit is provided, and the control method is applied to a control module of the single-input multi-output direct current-to-direct current circuit; the single-input multi-output direct current-to-direct current circuit comprises: the device comprises a single inductor, a control module, a driving module and a plurality of charging signal output ends; the control module is connected with the driving module, the single inductor is connected with the driving module, and the plurality of charging signal output ends are respectively connected with the single inductor through the driving module;
the control method of the single-input multi-output direct current-to-direct current circuit comprises the following steps:
acquiring charging signals of all charging signal output ends; the charging signal is used for representing whether the charging signal output end needs to be charged or not;
determining a target phase value; the target phase value is the phase of a preset clock period;
when the target phase value is in a first type of charging phase range, charging the single inductor through the driving module;
when the target phase value is in a second type of charging phase range, based on the target phase value and the charging signal, charging each charging signal output end to be charged through the single inductor and the driving module respectively according to a time division multiplexing principle;
wherein the first type of charging phase range and the second type of charging phase range do not have an intersection.
Further, the second type of charging phase range comprises a plurality of sub-phase ranges, and the sub-phase ranges are in one-to-one correspondence with the charging signal output ends; wherein no intersection exists between any two sets of the plurality of sub-phase ranges; the step of respectively charging the charging signal output ends to be charged through the single inductor and the driving module according to the principle of time division multiplexing comprises the following steps:
determining a sub-phase range including the target phase value as a target sub-phase range;
and the single inductor and the driving module charge the charging signal output end corresponding to the target sub-phase range.
Further, the method further comprises the following steps:
determining the voltage values of different loads output by the charging signal output ends;
and determining the magnitude of the corresponding sub-phase range of each charging signal output terminal based on the magnitude of the voltage value.
Further, the target phase value further includes a third type of charging phase range;
and when the target phase value is in a third type of charging phase range, controlling the residual electric quantity in the single inductor to be returned to the driving module.
Wherein the third type of charging phase range does not intersect the first type of charging phase range; the third type of charging phase range does not intersect the second type of charging phase range.
According to a second aspect of the embodiment of the present application, there is provided a control device for a single-input multiple-output dc-dc circuit, applied to the single-input multiple-output dc-dc circuit, the single-input multiple-output dc-dc circuit comprising: the device comprises a single inductor, a control device, a driving module and a plurality of charging signal output ends; the control device is connected with the driving module, the single inductor is connected with the driving module, and the plurality of charging signal output ends are respectively connected with the single inductor through the driving module; the control device of the single-input multi-output direct current-to-direct current circuit comprises:
the acquisition module acquires the charging signals of the charging signal output ends; the charging signal is used for representing whether the charging signal output end needs to be charged or not;
the determining module is used for determining a target phase value; the target phase value is the phase of a preset clock period;
the inductance charging module is used for charging the single inductance through the driving module when the target phase value is in a first type of charging phase range;
the output end charging module is used for respectively charging all the charging signal output ends to be charged through the single inductor and the driving module according to a time division multiplexing principle based on the target phase value and the charging signal when the target phase value is in a second type of charging phase range;
wherein the first type of charging phase range and the second type of charging phase range do not have an intersection.
According to a third aspect of an embodiment of the present application, there is provided a control system for a single input multiple output dc-dc circuit, including:
the device comprises a single inductor, a plurality of capacitors, a control module, a driving module and a plurality of charging signal output ends;
the control module is connected with the driving module, the single inductor is connected with the driving module, and the plurality of charging signal output ends are respectively connected with the single inductor through the driving module;
the capacitors are in one-to-one correspondence with the charging signal output ends; one end of each capacitor is grounded, and the other end of each capacitor is connected with the corresponding charging signal output end;
the control module is configured to execute the control method of the single-input multiple-output dc-dc circuit according to any one of the first aspect of the embodiments of the present application.
Further, the method further comprises the following steps:
a reference voltage terminal and a voltage stabilizing module;
the voltage stabilizing module comprises a plurality of voltage stabilizing circuits, and the voltage stabilizing circuits are in one-to-one correspondence with the charging signal output ends;
the voltage stabilizing circuit comprises a voltage dividing resistor and a comparator;
the reference voltage end is connected with the reverse input end of each comparator respectively, and the comparison output end of each comparator is connected with the control module.
The voltage dividing resistor comprises a first resistor and a second resistor;
the first end of the first resistor is connected with the corresponding charging signal output end, the second end of the first resistor is connected with the first end of the second resistor, and the second end of the second resistor is grounded;
the second end of the first resistor is connected with the corresponding homodromous input end of the comparator.
Further, the driving module includes:
the device comprises an inductance switch, a control switch, a plurality of driving switches and a battery;
one end of the battery is grounded, and the other end of the battery is connected with the inductance input end of the single inductor; the battery is used for charging the single inductor;
one end of the driving switch is connected with the inductance output end of the single inductance, the other end of the driving switch is connected with the charging signal output end, and the driving switches are in one-to-one correspondence with the charging signal output ends; each driving switch is respectively connected between the single inductor and the corresponding charging signal output end;
the inductance switch is connected between the battery and the single inductance;
one end of the control switch is grounded, and the other end of the control switch is connected with the inductance input end of the single inductance.
Further, the control module includes a controller and an oscillator.
According to the technical scheme, the target phase value of each charging signal output end corresponding to the charging signal is determined through the obtained charging signal of each charging signal output end, the second type charging phase range in the preset period is corresponding to the target phase value, the first type charging phase range is fixed to the single inductor for charging, the control module controls the driving module to drive the single inductor to obtain corresponding charging according to the first type charging phase range in the preset period, and then each charging signal output end needing to be charged is charged according to the second type charging phase range, so that the control method of the single-inductor single-input multi-output direct current-to-direct current circuit is realized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
FIG. 1 is a flow chart of a method for controlling a single-input multiple-output DC-DC circuit according to an exemplary embodiment;
FIG. 2 is a schematic block diagram of a control device for a single-input multiple-output DC-DC circuit, according to an exemplary embodiment;
fig. 3 is a schematic circuit diagram of a control system for a single-input multiple-output dc-to-dc circuit according to another exemplary embodiment.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
Example 1
Referring to fig. 1, fig. 1 is a flow chart illustrating a control method of a single-input multiple-output dc-dc circuit according to an exemplary embodiment, where the method is applied to a control module of the single-input multiple-output dc-dc circuit; the single-input multi-output direct current-to-direct current circuit comprises: the device comprises a single inductor, a control module, a driving module and a plurality of charging signal output ends; the control module is connected with the driving module, the single inductor is connected with the driving module, and a plurality of charging signal output ends are respectively connected with the single inductor through the driving module;
as shown in fig. 1, the control method of the single-input multiple-output dc-dc circuit includes:
s11, step: acquiring charging signals of all charging signal output ends; the charging signal is used for representing whether the charging signal output end needs to be charged.
Specifically, the application has only one inductor, namely a single inductor, but can correspond to a plurality of charging signal output ends, wherein the charging signal output ends are the places where the output ends of a plurality of output circuits output charging signals, whether the voltage of the charging signal output ends is lower than the preset voltage is judged according to the preset voltage, if the voltage is lower than the preset voltage, the charging signal is output to the control module at the moment, and the control module acquires the charging signal.
S12, step: determining a target phase value; the target phase value is the phase of a preset clock cycle.
Specifically, the preset clock period is determined according to the number of charging signal output ends outputting the charging signal, for example, three charging signal output ends output the charging signal, and four charging phase ranges are preset in the clock, wherein the four phase ranges respectively comprise one phase range for charging the inductor and three charging phase ranges corresponding to three target phase values of the three charging signal output ends.
Therefore, we first determine that the target phase value of each charging signal output corresponds to the charging phase range within the preset clock.
S13, step: when the target phase value is in the first type of charging phase range, the single inductor is charged through the driving module.
The value indicates that the first charging phase range in the preset clock is fixed for charging the inductor, the charging signal output end which needs to be charged only after the inductor is charged, and then the charging signal output end which does not need to be charged is discharged.
S14, step: and when the target phase value is in the second type of charging phase range, based on the target phase value and the charging signal, respectively charging each charging signal output end to be charged through the single inductor and the driving module according to the principle of time division multiplexing.
Wherein there is no intersection of the first type of charging phase range and the second type of charging phase range.
Specifically, the principle of time division multiplexing is to use time as a parameter of signal division transmission, so that each signal must be mutually non-overlapped on a time axis, and different signals are transmitted in different times. The entire transmission time is divided into time intervals, also called time slots, which do not overlap each other. The time division multiplexing technique allocates these time slots to each signal source for use, each time slot being occupied by only one signal. Time multiplexing achieves a circuit to transmit multiple signals by cross-transmitting a portion of each signal in time. Only one signal is present at each brief moment in the circuit.
It can be understood that after the charging signal of each charging signal output end is sent to the control module, charging of all the charging signal output ends can be achieved within a preset clock period. This reduces the ripple of the output voltage of each charging signal output on the one hand and dynamically allocates the charging time of each charging signal output to accommodate different voltage loads on the other hand. That is, the first-type charging phase range and the second-type charging phase range of the preset clock are thought to correspond to the charging time.
In the prior art, when the load difference between the outputs is large, the output with low load will waste most of the load capacity of the inductor used by the output, because the connected inductor of each output needs to meet the maximum load requirement, and the load capacity cannot be dynamically distributed among the outputs.
In order to avoid the defects of the prior art, the application adopts the principle of time-sharing multiplexing, dynamically distributes the single inductor and the charging time of each charging signal output end through the first type charging phase range and the second type charging phase range in the preset clock period, and further realizes the dynamic distribution of the bearing capacity of the single inductor to a plurality of charging signal output ends.
It can be understood that according to the method, the target phase value of each charging signal output end corresponding to the charging signal is determined through the obtained charging signal of each charging signal output end, the second type charging phase range in the preset period is corresponding to the target phase value, the first type charging phase range is fixed to the single inductor for charging, the control module controls the driving module to drive the single inductor according to the first type charging phase range in the preset period to obtain corresponding charging, and then each charging signal output end needing to be charged is charged according to the second type charging phase range, so that the control method of the single-inductor single-input multi-output direct current-to direct current circuit is realized.
In some embodiments, a charging signal of each charging signal output is obtained; the charging signal is used for representing whether the charging signal output end needs to be charged or not; determining a target phase value; the target phase value is the phase of a preset clock period; the phases of the preset clock period comprise a first type charging phase range and a second type charging phase range. The second type of charging phase range comprises a plurality of sub-phase ranges, and the sub-phase ranges are in one-to-one correspondence with the charging signal output ends; wherein no intersection exists between any two sets in the plurality of sub-phase ranges; according to the principle of time-sharing multiplexing, the charging of each charging signal output end to be charged through the single inductor and the driving module respectively comprises the following steps:
a sub-phase range including the target phase value is determined as the target sub-phase range.
And the single inductor and the driving module charge the charging signal output end corresponding to the target sub-phase range.
It can be understood that the sub-phase ranges correspond to the sub-phase ranges of the target phase values of the charging signal output ends to be charged, that is, the sub-phase ranges correspond to the charging signal output ends one by one; wherein there is no intersection between any two sets of the plurality of sub-phase ranges.
Based on the target phase value, determining which charging signal output end corresponds to which target sub-phase range, wherein the value is described that the implementation process of charging is realized based on a single inductor and a driving module in a hardware system according to a time division multiplexing principle, and the specific implementation method is described in the first embodiment and is not repeated here.
In some embodiments, further comprising: determining the voltage values of different loads output by each charging signal output end;
the magnitude of the corresponding sub-phase range of each charging signal output is determined based on the magnitude of the voltage value.
It can be understood that the multiple sub-phase ranges in the preset clock period are set corresponding to the voltage values of the respective charging signal output terminals, the larger the voltage value is, the longer the corresponding charging signal output terminal needs to be charged, the larger the corresponding sub-phase range is, the smaller the voltage value is, the smaller the corresponding charging signal output terminal needs to be charged, the smaller the corresponding sub-phase range is, so that the voltage value is distributed into the phase with the larger sub-phase range, and the voltage value is distributed into the small sub-phase range, thereby dynamically determining the distribution of the corresponding sub-phase range according to the voltage value.
In some embodiments, a charging signal of each charging signal output is obtained; the charging signal is used for representing whether the charging signal output end needs to be charged or not; determining a target phase value; the target phase value is the phase of a preset clock period; the phases of the preset clock period comprise a first type charging phase range, a second type charging phase range and a third type charging phase range. That is, the target phase value of each charging signal output may be located in the first type of charging phase range or the second type of charging phase range, and may also be located in the third type of charging phase range.
The first type of charging phase range is still fixed to the single inductor for charging, the second type of charging phase range still comprises a plurality of sub-phase ranges, the sizes of the sub-phase ranges are determined based on the target phase values of the charging signal output ends, the target phase values of the charging signal output ends are dynamically distributed to the target sub-phase ranges, the charging time of the single inductor and the charging signal output ends is dynamically distributed, and further the dynamic distribution of the bearing capacity of the single inductor to the charging signal output ends is achieved.
Finally, for the third type of charging phase range, that is, a phase added in the preset clock period of the first embodiment, the phase does not act on each charging signal output end, but acts on the single inductor, the phase is used as the last phase in the preset clock period, and after the single inductor is used for outputting and charging each charging signal, if the single inductor has residual energy, the third type of charging phase range acts to transmit the residual energy back to the battery of the driving module, so that output voltage ripple is not increased additionally, and energy waste is not increased.
Wherein the third type of charging phase range does not intersect the first type of charging phase range; there is no intersection of the third type of charging phase range with the second type of charging phase range.
Referring to fig. 2, fig. 2 is a schematic block diagram of a control device for a single-input multiple-output dc-dc circuit, where the control device is applied to the single-input multiple-output dc-dc circuit as shown in fig. 2, and includes:
the acquisition module 1 acquires the charging signals of the charging signal output ends; the charging signal is used for representing whether the charging signal output end needs to be charged or not;
a determining module 2, configured to determine a target phase value; the target phase value is the phase of a preset clock period;
the inductance charging module 3 is used for charging the single inductance through the driving module when the target phase value is in the first type of charging phase range;
the output end charging module 4 is used for respectively charging each charging signal output end to be charged through the single inductor and the driving module according to the principle of time division multiplexing based on the target phase value and the charging signal when the target phase value is in the second type charging phase range;
wherein there is no intersection of the first type of charging phase range and the second type of charging phase range.
Specifically, a control device for a single-input multiple-output dc-dc circuit may refer to a specific implementation manner of a control method for a single-input multiple-output dc-dc circuit in any of the above embodiments, which is not described herein.
It can be understood that according to the method, the target phase value of each charging signal output end corresponding to the charging signal is determined through the obtained charging signal of each charging signal output end, the second type charging phase range in the preset period is corresponding to the target phase value, the first type charging phase range is fixed to the single inductor for charging, the control module controls the driving module to drive the single inductor according to the first type charging phase range in the preset period to obtain corresponding charging, and then each charging signal output end needing to be charged is charged according to the second type charging phase range, so that the control method of the single-inductor single-input multi-output direct current-to direct current circuit is realized.
Example two
Referring to fig. 3, fig. 3 is a schematic circuit diagram of a control system of a single input multiple output dc to dc circuit, as shown in fig. 3, including:
a single inductor L1, a plurality of capacitors, a control module 101, a driving module 102, and a plurality of outputs.
Illustratively, referring to fig. 3, the plurality of capacitors are capacitor C1, capacitor C2, and capacitor C3; the plurality of output terminals are a charging signal output terminal Vout1, a charging signal output terminal Vout2, and a charging signal output terminal Vout3.
The control module 101 is connected with the driving module 102, the single inductor L1 is connected with the driving module 102, and the charging signal output end Vout1, the charging signal output end Vout2 and the charging signal output end Vout3 are respectively connected with the single inductor L1 through the driving module 102;
the capacitor C1, the capacitor C2 and the capacitor C3 are in one-to-one correspondence with the charging signal output end Vout1, the charging signal output end Vout2 and the charging signal output end Vout 3; one end of each capacitor is grounded, and the other end of each capacitor is connected with the corresponding charging signal output end;
the control module 101 is configured to execute the control method of the single-input multiple-output dc-dc circuit in any of the above embodiments of the present application.
In a specific embodiment, the connection circuits of the single inductor L1, the capacitor C2, the capacitor C3, the control module 101, the driving module 102, the charging signal output terminal Vout1, the charging signal output terminal Vout2, and the charging signal output terminal Vout3 realize a topology structure of single input, single inductor, and multiple outputs
The specific implementation method may refer to the specific implementation method of the single-input multi-output dc-dc circuit control method in any embodiment, which is not described herein.
The values illustrate that only the capacitors C1-C3 and the single inductor L1 are located off-chip and other components are on-chip.
Preferably, the driving module includes:
an inductive switch Q1, a control switch Q2, drive switches Q5-Q7 and a battery;
one end of the battery is grounded, and the other end of the battery is connected with the inductance input end of the single inductance L1; the battery is used for charging the single inductor L1;
in a specific application, one end of each driving switch is connected with the inductance output end of the single inductance L1, the other end of each driving switch is connected with the charging signal output end, and the driving switches are in one-to-one correspondence with the charging signal output ends; that is, the charging signal output terminal Vout1 is connected to the driving switch Q5 through the driving switch Q7, the charging signal output terminal Vout2 and the driving switch Q6, and the charging signal output terminal Vout3, respectively.
The inductance switch Q2 is connected between the battery and the single inductance L1;
one end of the control switch Q1 is grounded, and the other end of the control switch Q1 is connected with the inductance input end of the single inductance L1.
It will be appreciated that when the inductive switch Q1 is closed, the battery charges the single inductor L1, i.e. when the predetermined clock period is within the first type of charging phase range in the above embodiment, the inductive switch Q1 is closed, the battery charges the single inductor L1. When the preset clock period is in the second type of charging phase range, charging is performed to the three charging signal output ends of the charging signal output end Vout1, the charging signal output end Vout2 and the charging signal output end Vout 3:
when the charging signal output end Vout1 needs to be charged, the control switch Q2 is closed, the driving switch Q7 is closed, and the single inductor L1 charges the charging signal output end Vout 1;
when the charging signal output end Vout2 needs to be charged, the control switch Q2 is closed, and the driving switch Q6 is closed to charge the charging signal output end Vout2 through the single inductor L1;
when the charging signal output end Vout3 needs to be charged, the control switch Q2 is closed, the driving switch Q5 is closed, and the single inductor L1 charges the charging signal output end Vout 3;
in some embodiments, the drive module 102 further includes closed loop switches Q3 and Q4;
when the preset clock period is in the third type of charging phase range, that is, after the single inductor finishes charging each charging signal output, if the single inductor has residual energy, the control module 101 drives the closing switches Q3 and Q4 and the inductive switch Q1 to be closed, so that the residual energy is transmitted back to the battery of the driving module 102, and thus, output voltage ripple is not increased additionally, and energy waste is not increased.
Preferably, the method further comprises:
a reference voltage terminal 103 and a voltage stabilizing module 104;
the voltage stabilizing module 104 comprises a plurality of voltage stabilizing circuits, and the voltage stabilizing circuits are in one-to-one correspondence with a plurality of charging signal output ends;
the voltage stabilizing circuit comprises a voltage dividing resistor and a comparator; the voltage dividing resistor comprises a first resistor and a second resistor;
the first end of the first resistor is connected with the charging signal output end, the second end of the first resistor is connected with the first end of the second resistor, and the second end of the second resistor is grounded;
an intermediate node is arranged between the second end of the first resistor and the first end of the second resistor, and the intermediate node is connected with the same-direction input end of the comparator.
It should be noted that the reference voltage terminal 103 is connected to an inverting input terminal of the comparator, and a comparison output terminal of the comparator is connected to the control module 101.
Specifically, the reference voltage terminal 103 mainly outputs a required reference voltage to a comparator of the voltage stabilizing circuit, and combines with a voltage dividing resistor and the comparator in the voltage stabilizing module 104 to realize feedback of the charging signal. Because the connection and implementation method of the voltage stabilizing circuit 104 are related art, the description thereof is omitted herein.
Preferably, the control module includes a controller 106 and an oscillator 105.
It should be noted that the frequency of the output of the oscillator 105 is not limited to a fixed frequency.
Specifically, a specific implementation method of a control system for a single-input multiple-output dc-dc circuit may refer to a specific implementation method of a control method for a single-input multiple-output dc-dc circuit in any of the above embodiments, which is not described herein.
It can be understood that according to the method, the target phase value of each charging signal output end corresponding to the charging signal is determined through the obtained charging signal of each charging signal output end, the second type charging phase range in the preset period is corresponding to the target phase value, the first type charging phase range is fixed to the single inductor for charging, the control module controls the driving module to drive the single inductor according to the first type charging phase range in the preset period to obtain corresponding charging, and then each charging signal output end needing to be charged is charged according to the second type charging phase range, so that the control method of the single-inductor single-input multi-output direct current-to direct current circuit is realized.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
It should be noted that in the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present application, unless otherwise indicated, the meaning of "plurality" means at least two.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, result, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, results, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (9)
1. The control method of the single-input multi-output direct current-to-direct current circuit is characterized by being applied to a control module of the single-input multi-output direct current-to-direct current circuit, wherein the single-input multi-output direct current-to-direct current circuit comprises the following components: the device comprises a single inductor, a control module, a driving module and a plurality of charging signal output ends; the control module is connected with the driving module, the single inductor is connected with the driving module, and the plurality of charging signal output ends are respectively connected with the single inductor through the driving module;
the control method of the single-input multi-output direct current-to-direct current circuit comprises the following steps:
acquiring charging signals of all charging signal output ends; the charging signal is used for representing whether the charging signal output end needs to be charged or not;
determining a target phase value, wherein the target phase value is the phase of a preset clock period;
when the target phase value is in a first type of charging phase range, charging the single inductor through the driving module;
when the target phase value is in a second type of charging phase range, based on the target phase value and the charging signal, charging each charging signal output end to be charged through the single inductor and the driving module respectively according to a time division multiplexing principle;
wherein the first type of charging phase range and the second type of charging phase range do not have an intersection.
2. The method of claim 1, wherein the second type of charging phase range includes a plurality of sub-phase ranges, the sub-phase ranges corresponding one-to-one with the charging signal outputs; wherein no intersection exists between any two sets of the plurality of sub-phase ranges; the step of respectively charging the charging signal output ends to be charged through the single inductor and the driving module according to the principle of time division multiplexing comprises the following steps:
determining a sub-phase range including the target phase value as a target sub-phase range;
and the single inductor and the driving module charge the charging signal output end corresponding to the target sub-phase range.
3. The method as recited in claim 2, further comprising:
determining the voltage values of different loads output by the charging signal output ends;
and determining the magnitude of the corresponding sub-phase range of each charging signal output terminal based on the magnitude of the voltage value.
4. The method of claim 1, wherein the target phase value further comprises a third type of charging phase range;
when the target phase value is in a third type of charging phase range, controlling the residual electric quantity in the single inductor to be returned to the driving module;
wherein the third type of charging phase range does not intersect the first type of charging phase range; the third type of charging phase range does not intersect the second type of charging phase range.
5. A control device of a single-input multi-output direct current-to-direct current circuit is applied to the single-input multi-output direct current-to-direct current circuit, and the single-input multi-output direct current-to-direct current circuit comprises: the device comprises a single inductor, a control device, a driving module and a plurality of charging signal output ends; the control device is connected with the driving module, the single inductor is connected with the driving module, and the plurality of charging signal output ends are respectively connected with the single inductor through the driving module;
the control device of the single-input multi-output direct current-to-direct current circuit comprises:
the acquisition module is used for acquiring charging signals of all the charging signal output ends, wherein the charging signals are used for representing whether the charging signal output ends need to be charged or not;
the determining module is used for determining a target phase value, wherein the target phase value is the phase of a preset clock period;
the inductance charging module is used for charging the single inductance through the driving module when the target phase value is in a first type of charging phase range;
the output end charging module is used for respectively charging all the charging signal output ends to be charged through the single inductor and the driving module according to a time division multiplexing principle based on the target phase value and the charging signal when the target phase value is in a second type of charging phase range;
wherein the first type of charging phase range and the second type of charging phase range do not have an intersection.
6. A control system for a single-input multiple-output dc-to-dc circuit, comprising:
the device comprises a single inductor, a plurality of capacitors, a control module, a driving module and a plurality of charging signal output ends;
the control module is connected with the driving module, the single inductor is connected with the driving module, and the plurality of charging signal output ends are respectively connected with the single inductor through the driving module;
the capacitors are in one-to-one correspondence with the charging signal output ends; one end of each capacitor is grounded, and the other end of each capacitor is connected with the corresponding charging signal output end;
the control module is used for executing the control method of the single-input multi-output direct current-to-direct current circuit in any one of claims 1-4.
7. The system of claim 6, further comprising:
a reference voltage terminal and a voltage stabilizing module;
the voltage stabilizing module comprises a plurality of voltage stabilizing circuits, and the voltage stabilizing circuits are in one-to-one correspondence with the charging signal output ends;
the voltage stabilizing circuit comprises a voltage dividing resistor and a comparator;
the reference voltage end is respectively connected with the reverse input end of each comparator, and the comparison output end of each comparator is connected with the control module;
the voltage dividing resistor comprises a first resistor and a second resistor;
the first end of the first resistor is connected with the corresponding charging signal output end, the second end of the first resistor is connected with the first end of the second resistor, and the second end of the second resistor is grounded;
the second end of the first resistor is connected with the corresponding homodromous input end of the comparator.
8. The system of claim 6, wherein the drive module comprises:
the device comprises an inductance switch, a control switch, a plurality of driving switches and a battery;
one end of the battery is grounded, and the other end of the battery is connected with the inductance input end of the single inductor; the battery is used for charging the single inductor;
one end of the driving switch is connected with the inductance output end of the single inductance, the other end of the driving switch is connected with the charging signal output end, and the driving switches are in one-to-one correspondence with the charging signal output ends; each driving switch is respectively connected between the single inductor and the corresponding charging signal output end;
the inductance switch is connected between the battery and the single inductance;
one end of the control switch is grounded, and the other end of the control switch is connected with the inductance input end of the single inductance.
9. The system of claim 6, wherein the control module comprises a controller and an oscillator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311513134.9A CN117240087A (en) | 2023-11-14 | 2023-11-14 | Control method, device and system of single-input multi-output direct current-to-direct current circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311513134.9A CN117240087A (en) | 2023-11-14 | 2023-11-14 | Control method, device and system of single-input multi-output direct current-to-direct current circuit |
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| CN110120744A (en) * | 2018-02-07 | 2019-08-13 | 意法半导体股份有限公司 | Electronic commutator, relevant audio system, integrated circuit and the method for operating electronic commutator |
| EP3627681A1 (en) * | 2018-09-19 | 2020-03-25 | Diehl AKO Stiftung & Co. KG | Single inductor multiple output (simo) switch mode power converter |
| CN111490680A (en) * | 2019-01-29 | 2020-08-04 | 马克西姆综合产品公司 | Continuous conduction mode single-input multi-output device |
| CN113692696A (en) * | 2019-04-15 | 2021-11-23 | 高通股份有限公司 | Single Inductor Multiple Output (SIMO) power converter with cross regulation switch |
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| CN110120744A (en) * | 2018-02-07 | 2019-08-13 | 意法半导体股份有限公司 | Electronic commutator, relevant audio system, integrated circuit and the method for operating electronic commutator |
| EP3627681A1 (en) * | 2018-09-19 | 2020-03-25 | Diehl AKO Stiftung & Co. KG | Single inductor multiple output (simo) switch mode power converter |
| CN111490680A (en) * | 2019-01-29 | 2020-08-04 | 马克西姆综合产品公司 | Continuous conduction mode single-input multi-output device |
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