CN117578887B - Driving power circuit and related device - Google Patents
Driving power circuit and related device Download PDFInfo
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- CN117578887B CN117578887B CN202410058640.1A CN202410058640A CN117578887B CN 117578887 B CN117578887 B CN 117578887B CN 202410058640 A CN202410058640 A CN 202410058640A CN 117578887 B CN117578887 B CN 117578887B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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- Engineering & Computer Science (AREA)
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- Dc-Dc Converters (AREA)
Abstract
The application provides a driving power circuit and a related device, wherein the driving power circuit comprises: the main control unit is used for acquiring voltage demand information, wherein the voltage demand information is used for indicating the load voltage required to be output at the current moment; determining the load voltage required to be output at the current moment according to the voltage demand information; and determining a control signal corresponding to the adjusting unit according to the load voltage; the adjusting unit is connected with the voltage input port and is used for adjusting the first input voltage according to the control signal to obtain a second input voltage; a transformer unit for converting the second input voltage into an output first output voltage; the output processing unit is connected with the load voltage output port and is used for carrying out output processing on the first output voltage to obtain the load voltage.
Description
Technical Field
The application belongs to the technical field of power supplies, and particularly relates to a driving power supply circuit and a related device.
Background
At present, siC MOSFET power devices are widely paid attention to and used because of their excellent switching characteristics and low-loss characteristics, but products on the market at present are different in positive voltage driving due to different processing technologies adopted, and negative voltage can be set to be substantially uniform. Because the input voltage of the existing driving power supply circuit is generally shared by the systems and cannot be adjusted, the turn ratio of the transformer can be adjusted to match, the transformer belongs to a custom device, the design, the test and the later adjustment and control are complex, the cost is high, and the error is easy to occur.
Disclosure of Invention
The application provides a driving power circuit and a related device, which aim to realize flexible and adjustable output voltage and improve the compatibility and reliability of the driving power circuit.
In a first aspect, the present application provides a driving power supply circuit comprising: the device comprises a main control unit, an adjusting unit, a transformer unit and an output processing unit, wherein the adjusting unit is connected with a voltage input port, the transformer unit and the main control unit, the transformer unit is connected with the output processing unit, and the output processing unit is connected with the load voltage output port; the voltage input port is used for accessing a first input voltage, and the load voltage output port is used for connecting a load;
The main control unit is used for acquiring voltage demand information, and the voltage demand information is used for indicating load voltage required to be output at the current moment; determining the load voltage required to be output at the current moment according to the voltage demand information; and determining a control signal corresponding to the adjusting unit according to the load voltage;
The adjusting unit is used for adjusting the first input voltage according to the control signal to obtain a second input voltage;
The transformer unit is used for converting the second input voltage into output first output voltage;
And the output processing unit is used for carrying out output processing on the first output voltage to obtain the load voltage.
In a second aspect, the present application provides a power supply comprising a voltage drive circuit as described in the first aspect.
In a third aspect, the application provides an electronic device comprising a voltage drive circuit as described in the first aspect or a power supply as described in the second aspect.
It can be seen that in the present application, firstly, the main control unit obtains the voltage demand information, where the voltage demand information is used to indicate the load voltage that needs to be output at the current moment; and determining the load voltage required to be output at the current moment according to the voltage demand information; and determining a control signal corresponding to the regulating unit according to the load voltage; then, the first input voltage is regulated by the regulating unit according to the control signal to obtain a second input voltage; then converting the second input voltage into an output first output voltage through a transformer unit; and finally, carrying out output processing on the first output voltage by an output processing unit to obtain the load voltage. Therefore, the output load voltage can be adjusted according to the voltage requirement, the output voltage can be flexibly adjusted, and the compatibility and reliability of the driving power supply circuit are improved.
Drawings
In order to more clearly illustrate the embodiments of the application 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, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a driving power circuit according to an embodiment of the present application;
FIG. 2 is a circuit diagram of a first power supply determination circuit according to an embodiment of the present application;
FIG. 3 is a circuit diagram of a second power supply determination circuit according to an embodiment of the present application;
fig. 4 is a circuit diagram of a third power supply determining circuit according to an embodiment of the present application;
fig. 5 is a circuit diagram of a fourth power supply determining circuit according to an embodiment of the present application;
Fig. 6 is a circuit diagram of a fifth power supply determining circuit according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a power supply according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, system, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The following description will first be made of the relevant terms that the present application relates to.
At present, siC MOSFET power devices are widely paid attention to and used because of their excellent switching characteristics and low-loss characteristics, but products on the market at present are different in positive voltage driving due to different processing technologies adopted, and negative voltage can be set to be substantially uniform. Because the input voltage of the existing driving power supply circuit is generally shared by the systems and cannot be adjusted, the turn ratio of the transformer can be adjusted to match, the transformer belongs to a custom device, the design, the test and the later adjustment and control are complex, the cost is high, and the error is easy to occur.
In order to solve the above problems, an embodiment of the present application provides a driving power supply circuit. The driving power supply circuit can be applied to the scene of enhancing the voltage output compatibility of the driving power supply circuit. The voltage demand information can be obtained by the main control unit and is used for indicating the load voltage required to be output at the current moment; and determining the load voltage required to be output at the current moment according to the voltage demand information; and determining a control signal corresponding to the regulating unit according to the load voltage; then, the first input voltage is regulated by the regulating unit according to the control signal to obtain a second input voltage; then converting the second input voltage into an output first output voltage through a transformer unit; and finally, carrying out output processing on the first output voltage by an output processing unit to obtain the load voltage. Therefore, the output load voltage can be adjusted according to the voltage requirement, the output voltage can be flexibly adjusted, and the compatibility and reliability of the driving power supply circuit are improved. The present solution may be applied to a variety of scenarios, including but not limited to the application scenarios mentioned above.
The specific driving power supply circuit will be described in detail.
Referring to fig. 1, the present application provides a driving power circuit 110, comprising: the main control unit 111, the regulating unit 112, the transformer unit 113 and the output processing unit 114, wherein the regulating unit 112 is connected with the voltage input port Vin, the transformer unit 113 and the main control unit 111, the transformer unit 113 is connected with the output processing unit 114, and the output processing unit 114 is connected with the load voltage output port 140 (the load voltage output port 140 comprises a load voltage normal phase output port v+ and a load voltage reverse phase output port V- > as shown in fig. 1); the voltage input port Vin is used for accessing a first input voltage, and the load voltage output port 140 is used for connecting a load; the main control unit 111 is configured to obtain voltage requirement information, where the voltage requirement information is used to indicate a load voltage that needs to be output at a current moment; determining the load voltage required to be output at the current moment according to the voltage demand information; and determining a corresponding control signal for the regulating unit 112 according to the load voltage; the adjusting unit 112 is configured to adjust the first input voltage according to the control signal to obtain a second input voltage; the transformer unit 113 is configured to convert the second input voltage into an output first output voltage; the output processing unit 114 is configured to perform output processing on the first output voltage to obtain the load voltage.
In a specific implementation, the output voltage (load voltage in this embodiment) and the input voltage are in a linear relationship, and in this embodiment, the input voltage of the transformer is adjusted by adding the adjusting unit 112 under the condition that the transformer is unchanged, so as to further realize the adjustment of the output voltage. Specifically, the main control unit 111 obtains voltage requirement information, where the voltage requirement information may be input by a user, or may be a load end requirement collected by the collection unit; determining a load voltage currently required by a load according to the voltage demand information, then acquiring the number and the state of the switches in the regulating unit 112, and setting a plurality of regulating parameters according to the number of the switches, wherein the regulating parameters are used for indicating the switch states of the switches in the regulating unit 112; and determining fixed parameters of each device in the output processing unit 114, and finally, calculating values of the plurality of adjustment parameters according to the fixed parameters and the inverse of the turns ratio of the transformer; the control signal for switching in the adjusting unit 112 is generated according to the values of the plurality of adjustment parameters, and the adjusting unit 112 adjusts the load voltage of which the switching state has been adjusted to be finally output according to the control signal.
It can be seen that, in the embodiment, the main control unit 111 obtains the voltage requirement information, where the voltage requirement information is used to indicate the load voltage that needs to be output at the current moment; and determining the load voltage required to be output at the current moment according to the voltage demand information; and determining a corresponding control signal for the regulating unit 112 according to the load voltage; the first input voltage is regulated by the regulating unit 112 according to the control signal to obtain a second input voltage; then converting the second input voltage into an output first output voltage through the transformer unit 113; finally, the output processing unit 114 performs output processing on the first output voltage to obtain the load voltage. In this way, the output load voltage can be adjusted according to the voltage requirement, flexible adjustment of the output voltage is realized, and compatibility and reliability of the driving power supply circuit 110 are improved. In particular, the output processing unit 114 may include one or more output processing subunits.
In a possible embodiment, the regulating unit comprises at least one switching subunit, each switching subunit being turned on and off under the control of the control signal.
In a specific implementation, the adjusting unit may include one or more switch subunits, and as the number of switch subunits increases, the number of load voltages that can be adjusted increases.
Specifically, the technical scheme of the present application is described below by some specific examples.
In one possible embodiment, the switch subunit may be formed by a switch and a diode, the number of the first diodes connected to the primary positive input end of the transformer is adjusted according to the switch state of the switch, and the magnitude of the input voltage is adjusted through the diode, so that the adjustment of the load voltage is realized.
Specifically, the switch subunit includes a first switch and a first diode; the first end of the first switch and the input end of the first diode are both connected with a voltage input port Vin or are both connected with the output end of the last switch subunit; the second end of the first switch and the output end of the first diode are both connected with the primary positive input end of the transformer unit or the input end of the next switch subunit.
Four switch subunits are illustrated as examples. As shown in fig. 2, a switch and a diode form a switch subunit, and when there are a plurality of switch subunits, each subunit is connected in turn, and then the output terminal is connected to the primary side non-inverting input terminal of the transformer unit. I.e. in fig. 2 there are four groups of switching subunits, a second switch K2 and a second diode D2, a third switch K3 and a third diode D3, a fourth switch K4 and a fourth diode D4, and a fifth switch K5 and a fifth diode D5. In this case, the switching states of the second switch K2, the third switch K3, the fourth switch K4, and the fifth switch K5 can be calculated by:
(equation 1)
Wherein v+ is the load voltage to be output currently, vin is the input voltage, a1 is the switch state of the second switch K2, a2 is the switch state of the third switch K3, a3 is the switch state of the fourth switch K4, a4 is the switch state of the fifth switch K5, vd1 is the voltage drop of the second diode D2, vd2 is the voltage drop of the third diode D3, vd3 is the voltage drop of the fourth diode D4, vd4 is the voltage drop of the fifth diode D5, and n is the turns ratio 1 between the primary side and the secondary side of the transformer: the reciprocal of n, vd5, is the voltage drop of the sixth diode D6 in the output processing subunit, and Vz1 is the voltage drop of the first voltage regulator Z1 in the output processing subunit. a1, a2, a3 and a4 have only two values of 0 and 1, 1 represents the state of the switch being off, and 0 represents the state of the switch being on.
In specific implementation, as shown in formula 1, after knowing the load voltage v+ from the voltage demand information, the input voltage Vin, the voltage drops Vd1 to Vd4 of the second diode D2 to the fifth diode D5, the reciprocal n of the turns ratio, the voltage drop Vd6 of the sixth diode, and the voltage Vz1 of the first voltage regulator are obtained. The values of a1, a2, a3 and a4 that establish the equations can be deduced. A control signal for each switch is generated from the resulting values. For example, let vd1=vd2=vd3=vd4=1, vd5=0.3v, vz1=3.2v, n=2, vin=12v; if the load voltage v+=20.5v to be output, a1, a2, a3 and a4 are all closed to makeTherefore, the values of a1, a2, a3 and a4 are determined to be 0, and corresponding control signals are generated to control the second switch K2, the third switch K3, the fourth switch K4 and the fifth switch K5 to be closed. Similarly, when K2, K3 and K4 are all closed and K5 is open, thenTherefore, the values of a1, a2 and a3 are determined to be 0, a4 is determined to be 1, corresponding control signals are generated to control the second switch K2, the third switch K3 and the fourth switch K4 to be closed, and the fifth switch K5 is controlled to be closed (namely, only the fifth switch K5 is connected); in addition, reasoning is performed in the same manner, and the second switch, the third switch or the fourth switch can be turned off, and the other three switches are turned on. Similarly, the switch combination of the present embodiment can also output load voltages of 16.5V, 14.5V, 12.5V, etc., and is determined according to the number of diodes connected.
I.e. the regulation of the voltage at the input of the transformer is flexibly regulated by series connection of a diode and a corresponding bypass device on the original input voltage Vin, where the bypass device may be a 0 ohm resistor, a dial switch, a jumper cap, an active switching device (triode, MOS tube) etc.
In one possible embodiment, as shown in fig. 3, the switch subunit may be composed of a plurality of switches and a plurality of diodes, and in particular, the switch subunit includes a second switch K2, a third switch K3, a fourth switch K4, a second diode D2, a third diode D3, a fourth diode D4, and a fifth diode D5; the input end of the second diode D2 is respectively connected with one end of the second switch K2, one end of the third switch K3 and the voltage input port Vin, the output end of the second diode D2 is respectively connected with the other end of the second switch K2 and the input end of the third diode D3, the output end of the third diode D3 is connected with one end of the fourth switch K4 and the input end of the fourth diode D4, the output end of the fourth diode D4 is connected with the input end of the fifth diode D5, and the output end of the fifth diode D5 is connected with the other end of the third switch K3, the other end of the fourth switch K4 and the primary side normal phase input end of the transformer unit.
In a specific implementation, the embodiment includes three switches and four diodes, and is connected in the above manner, when the states of the three switches are controlled, different numbers of diodes can be connected to the primary positive input end of the transformer unit, so as to change the magnitude of the input voltage. Specifically, the switching states of the second switch K2, the third switch K3, and the fourth switch K4 may be calculated by:
(equation 2)
Wherein v+ is the load voltage to be output currently, vin is the input voltage, a1 is the switch state of the second switch K2, a2 is the switch state of the third switch K3, a3 is the switch state of the fourth switch K4, vd1 is the voltage drop of the second diode D2, vd2 is the voltage drop of the third diode D3, vd3 is the voltage drop of the fourth diode D4, vd4 is the voltage drop of the fifth diode D5, and n is the turn ratio 1 of the primary side to the secondary side of the transformer: the inverse of n, vd5 is the voltage drop of the sixth diode D6 in the output processing subunit, and Vz1 is the first voltage regulator Z1 in the output processing subunit. a1, a2 and a3 have only two values of 0 and 1,1 represents the state of the switch being off, and 0 represents the state of the switch being on. As shown in equation 2, when the required load voltage v+=20.5v is set, known data is substituted into the above table to be availableFurther, it is possible to derive that a1=0 or 1, a2=0, a3=0 or 1, and then generate a control signal to control the second switch K2, the third switch K3, and the fourth switch K4 to be all closed, or to control only the third switch K3 to be closed, and the second switch K2 and the fourth switch K4 to be turned off. Similarly, a1, a2 and a3 under other load voltages can be calculated, so that control of corresponding switches is realized to control the driving power supply circuit to output corresponding load voltages.
It can be seen that in this embodiment, the output load voltage can be adjusted according to the voltage requirement, so that the output voltage can be flexibly adjusted, and the compatibility and reliability of the driving power supply circuit are improved. And compared with the scheme that one switch corresponds to one diode, the number of the used switches is smaller, and the cost is reduced.
In one possible embodiment, as shown in fig. 4, the device further comprises a starting unit, wherein the starting unit comprises a starting switch Q1; the switch subunit comprises a second switch K2, a third switch K3, a fourth switch K4, a second diode D2, a third diode D3, a fourth diode D4 and a fifth diode D5; the transformer unit comprises a plurality of transformers, and the output processing unit comprises a plurality of output processing subunits; the input end of the second diode D2 is respectively connected with one end of the second switch K2, one end of the third switch K3 and the voltage input port Vin, the output end of the second diode D2 is respectively connected with the other end of the second switch K2 and the input end of the third diode D3, the output end of the third diode D3 is connected with one end of the fourth switch K4 and the input end of the fourth diode D4, the output end of the fourth diode D4 is connected with the input end of the fifth diode D5, the output end of the fifth diode D5 is connected with the other end of the third switch K3, the other end of the fourth switch K4 and the primary positive input ends of a plurality of transformers, the primary inverting input end of each transformer is connected with the drain electrode of the starting switch Q1, the source electrode of the starting switch Q1 is grounded, the controlled end of the starting switch Q1 is connected with the main control unit, and the secondary output ends of the plurality of transformers are connected with the plurality of output processing subunits in a one-to-one correspondence.
In a specific implementation, the present embodiment includes a plurality of transformers (such as T1, T2, T3 in fig. 4, etc.) and a plurality of output processing subunits (such as the first output processing subunit 114-1, the second output processing subunit 114-2, the third output processing subunit 114-3, etc. in fig. 4), so as to output a plurality of load voltages (such as v+ and V-, v2+ and V2-, v3+ and V3-, etc. in fig. 4), and one adjusting unit is used to perform voltage adjustment, so as to output a plurality of identical load voltages, thereby realizing a plurality of power supply outputs. Furthermore, a control switch may be added for each transformer to control the number of load voltages to be output.
It can be seen that in this embodiment, a plurality of power supply outputs are realized, and the power supply capability of the power supply is improved.
In one possible embodiment, the switching subunit may also be formed by a switching tube, for example, a MOS tube, and the magnitude of the input voltage is adjusted by the switching state of the switching tube, so as to realize adjustment of the load voltage. Specifically, the switch subunit includes a first switch tube; the control end of the first switching tube is connected with the main control unit, the source electrode of the first switching tube is connected with the primary side reverse phase input end of the transformer unit or the input end of the last switching subunit, and the drain electrode of the first switching tube is connected with the next switching subunit or grounded.
Four switch subunits are illustrated as examples. As shown in fig. 5, when there are a plurality of switching sub-units, each sub-unit is connected in turn, and then the input terminal of the first switching tube is connected to the primary inverting input terminal of the transformer unit. The active device enhanced NMOS tube is matched with control software to realize the function of automatic voltage regulation, and NMOS is connected in series with the negative end of the input for the purpose of driving effectiveness and convenience, so that the reference ground of a driving signal can be the reference ground with GND1, and the technical conception of the application is consistent with that of the previous application. The benefits of using NMOS in addition are two: firstly, the parasitic diode of NMOS can be utilized to act as the diodes D2-D5 as shown in FIG. 2, and no additional diode is needed; and secondly, the NMOS is a controllable device, and the corresponding NMOS can be automatically driven through software configuration, so that the on-line automatic regulation of the output voltage is realized without manually regulating a hardware circuit.
In this case, the switching states of the second switching tube M2, the third switching tube M3, the fourth switching tube M4, and the fifth switching tube M5 can be calculated by:
(equation 3)
Wherein v+ is the load voltage to be output currently, vin is the input voltage, a1 is the switching state of the second switching tube M2, a2 is the switching state of the third switching tube M3, a3 is the switching state of the fourth switching tube M4, a4 is the switching state of the fifth switching tube M5, vd1 is the voltage drop of the second switching tube M2, vd2 is the voltage drop of the third switching tube M3, vd3 is the voltage drop of the fourth switching tube M4, vd4 is the voltage drop of the fifth switching tube M5, and n is the primary side and secondary side turns ratio 1 of the transformer: the inverse of n, vd5 is the voltage drop of the sixth diode D6 in the output processing subunit, and Vz1 is the first voltage regulator Z1 in the output processing subunit. a1, a2, a3 and a4 have only two values of 0 and 1, 1 represents the state of the switch being off, and 0 represents the state of the switch being on.
The basic principle is that when the corresponding driving signal (such as Drv 1) is set to 1, the corresponding NMOS is conducted, and the communication is conducted by a conducting wire, so that the parasitic diode in the NMOS is short-circuited, and the voltage drop is basically 0; when the drive is set to 0, the corresponding NMOS is turned off, and the parasitic diode in the NMOS is naturally turned on, so that the voltage drop is Vd. The switching state of each switching tube is calculated in the same way, and the control signal of each switching tube is regenerated, so that the four switching tubes are controlled.
It can be seen that, in this embodiment, compared with the schemes of the switch and the diode, the switching loss of the switching tube is improved, and the overall loss is reduced without switching loss.
In one possible embodiment, as shown in fig. 6, the device further comprises a starting unit, wherein the starting unit comprises a starting switch Q1; the main control unit comprises a controller, the switch subunit comprises a second switch tube M2, a third switch tube M3, a fourth switch tube M4 and a fifth switch tube M5, the transformer unit comprises a plurality of transformers (such as T1, T2 and T3 in fig. 6), and the output processing unit comprises a plurality of output processing subunits (such as a first output processing subunit 114-1, a second output processing subunit 114-2 and a third output processing subunit 114-3 in fig. 6); the pulse control end PWM of the controller is connected with the controlled ends of the starting switches Q1, the drain electrodes of the starting switches Q1 are respectively connected with the primary side reverse phase input ends of the transformers, the source electrode of the starting switch Q1 is connected with the source electrode of the second switching tube M2, the controlled end of the second switching tube M2 is connected with the first control end Drv1 of the controller, the drain electrode of the second switching tube M2 is connected with the source electrode of the third switching tube M3, the controlled end of the third switching tube M3 is connected with the second control end Drv2 of the controller, the drain electrode of the third switching tube M3 is connected with the source electrode of the fourth switching tube M4, the controlled end of the fourth switching tube M4 is connected with the source electrode of the fifth switching tube M5, the controlled end of the fifth switching tube M5 is connected with the fourth control end Drv4 of the controller, the controlled end of the fifth switching tube M5 is connected with the drain electrode of the fifth switching tube M5, and the output ends of the plurality of the transformers are connected with the output units in a one-to-one mode.
In a specific implementation, the embodiment includes a plurality of transformers and a plurality of output processing subunits, so as to output a plurality of load voltages (such as v+ and V-, v2+ and V2-, v3+ and V3-in fig. 4), and a regulating unit is used for regulating the voltages, outputting a plurality of identical load voltages, so as to realize a plurality of power supply outputs. Furthermore, a control switch may be added for each transformer to control the number of load voltages to be output.
It can be seen that in this embodiment, a plurality of power supply outputs are realized, and the power supply capability of the power supply is improved.
In one possible embodiment, referring to fig. 2 to 6, the load voltage output port 140 includes a load voltage normal phase output port v+ and a load voltage reverse phase output port V-; in different schemes, the output processing units may include only one (e.g., the first output processing subunit 114-1 in fig. 2,3, and 5), or may include multiple (e.g., the first output processing subunit 114-1, the second output processing subunit 114-2, and the third output processing subunit 114-3 in fig. 4 and 6). It will be appreciated that the structure of each output processing subunit is identical, and the structure of the output processing subunit will be described below by taking the first output processing subunit as an example. The first output processing subunit comprises a sixth diode D6, a first resistor R1, a first voltage stabilizing tube Z1, a first capacitor C1 and a second capacitor C2; the input end of the sixth diode D6 is connected with the corresponding secondary positive output end of the transformer, and the output end of the sixth diode D6 is connected with one end of the first resistor R1, one end of the first capacitor C1 and the load voltage positive output port; the input end of the first voltage stabilizing tube Z1 is connected with the secondary side inverting output end of the corresponding transformer, one end of the second capacitor C2 and the load voltage inverting output port; the other end of the first resistor, the other end of the first capacitor C1, the other end of the second capacitor C2 and the output end of the first voltage stabilizing tube Z1 are all grounded.
In the specific implementation, the output processing subunit processes the output voltage of the secondary side of the transformer to obtain the corresponding load voltage.
The present application also provides a power supply 120, as shown in fig. 7, including the driving power supply circuit 110, where the driving power supply circuit 110 is configured with a voltage input port Vin and a load voltage output port, and the input voltage is accessed through the voltage input port Vin, and the regulated load voltage is output through the load voltage output port.
The application also provides an electronic device 150, as shown in fig. 8, which comprises the power supply 120, and the power supply 120 supplies power to the internal components of the electronic device 150, so as to provide power support for realizing the normal functions of the electronic device 150.
The integrated units implemented in the form of software functional units described above may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: u disk, removable hard disk, magnetic disk, optical disk, volatile memory or nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an erasable programmable ROM (erasable PROM), an electrically erasable programmable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as external cache memory. By way of example, and not limitation, many forms of random access memory (random access memory, RAM) are available, such as static random access memory (STATIC RAM, SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (double DATA RATE SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCHLINK DRAM, SLDRAM), and direct memory bus random access memory (direct rambus RAM, DR RAM). Etc. various media in which program code may be stored.
Although the present invention is disclosed above, the present invention is not limited thereto. Variations and modifications, including combinations of the different functions and implementation steps, as well as embodiments of the software and hardware, may be readily apparent to those skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. A driving power supply circuit, characterized by comprising: the device comprises a main control unit, an adjusting unit, a transformer unit and an output processing unit, wherein the adjusting unit is connected with a voltage input port, the transformer unit and the main control unit, the transformer unit is connected with the output processing unit, and the output processing unit is connected with a load voltage output port; the voltage input port is used for accessing a first input voltage, and the load voltage output port is used for connecting a load;
the main control unit is used for acquiring voltage demand information, and the voltage demand information is used for indicating load voltage required to be output at the current moment; determining the load voltage required to be output at the current moment according to the voltage demand information;
And determining a control signal corresponding to the adjusting unit according to the load voltage, comprising: calculating a value of at least one adjustment parameter according to the load voltage, a fixed parameter and the inverse of the turns ratio of the transformer, the value of the at least one adjustment parameter being used to indicate the switching state of at least one switch in the regulating unit; and generating at least one of said control signals in dependence on the value of said at least one adjustment parameter;
The adjusting unit is used for controlling the switching state of the at least one switch according to the at least one control signal so as to adjust the first input voltage to obtain a second input voltage;
The transformer unit is used for converting the second input voltage into output first output voltage;
And the output processing unit is used for carrying out output processing on the first output voltage to obtain the load voltage.
2. The drive power supply circuit according to claim 1, wherein the regulating unit comprises at least one switching subunit, each switching subunit being turned on and off under the control of the control signal.
3. The drive power supply circuit according to claim 2, wherein the switching sub-unit includes a first switch and a first diode;
the first end of the first switch and the input end of the first diode are both connected with a voltage input port or are both connected with the output end of the last switch subunit; the second end of the first switch and the output end of the first diode are both connected with the primary positive input end of the transformer unit or the input end of the next switch subunit.
4. The drive power supply circuit according to claim 2, wherein the switching sub-unit includes a first switching tube; the control end of the first switching tube is connected with the main control unit, the source electrode of the first switching tube is connected with the primary side reverse phase input end of the transformer unit or the input end of the last switching subunit, and the drain electrode of the first switching tube is connected with the next switching subunit or grounded.
5. The drive power supply circuit according to claim 2, wherein the switching sub-unit includes a second switch, a third switch, a fourth switch, a second diode, a third diode, a fourth diode, and a fifth diode;
The input end of the second diode is respectively connected with one end of the second switch, one end of the third switch and a voltage input port, the output end of the second diode is respectively connected with the other end of the second switch and the input end of the third diode, the output end of the third diode is connected with one end of the fourth switch and the input end of the fourth diode, the output end of the fourth diode is connected with the input end of the fifth diode, and the output end of the fifth diode is connected with the other end of the third switch, the other end of the fourth switch and the primary side normal phase input end of the transformer unit.
6. The drive power supply circuit according to claim 2, further comprising a start-up unit including a start-up switch; the switch subunit comprises a second switch, a third switch, a fourth switch, a second diode, a third diode, a fourth diode and a fifth diode; the transformer unit comprises a plurality of transformers, and the output processing unit comprises a plurality of output processing subunits;
the input end of the second diode is respectively connected with one end of the second switch, one end of the third switch and a voltage input port, the output end of the second diode is respectively connected with the other end of the second switch and the input end of the third diode, the output end of the third diode is connected with one end of the fourth switch and the input end of the fourth diode, the output end of the fourth diode is connected with the input end of the fifth diode, the output end of the fifth diode is connected with the other end of the third switch, the other end of the fourth switch and primary positive input ends of a plurality of transformers, the primary negative input end of each transformer is connected with the drain electrode of a starting switch, the source electrode of the starting switch is grounded, the controlled end of the starting switch is connected with a main control unit, and the secondary output ends of the plurality of transformers are connected with the plurality of output processing subunits in a one-to-one correspondence.
7. The drive power supply circuit according to claim 2, further comprising a start-up unit including a start-up switch; the main control unit comprises a controller, the switch subunit comprises a second switch tube, a third switch tube, a fourth switch tube and a fifth switch tube, the transformer unit comprises a plurality of transformers, and the output processing unit comprises a plurality of output processing subunits;
The pulse control end of the controller is connected with the controlled ends of the starting switches, the drain electrodes of the starting switches are respectively connected with the primary side reverse phase input ends of the transformers, the source electrode of the starting switch is connected with the source electrode of the second switching tube, the controlled ends of the second switching tube are connected with the first control end of the controller, the drain electrode of the second switching tube is connected with the source electrode of the third switching tube, the controlled end of the third switching tube is connected with the second control end of the controller, the drain electrode of the third switching tube is connected with the source electrode of the fourth switching tube, the controlled end of the fourth switching tube is connected with the third control end of the controller, the drain electrode of the fourth switching tube is connected with the source electrode of the fifth switching tube, the controlled end of the fifth switching tube is connected with the fourth control end of the controller, the drain electrode of the fifth switching tube is grounded, and the secondary side output ends of the transformers are correspondingly connected with the output processing subunits one by one.
8. The drive power supply circuit according to any one of claims 1 to 7, wherein the load voltage output port includes a load voltage non-inverting output port and a load voltage inverting output port; the output processing unit comprises at least one output processing subunit, and each output processing subunit comprises a sixth diode, a first resistor, a first voltage stabilizing tube, a first capacitor and a second capacitor;
The input end of the sixth diode is connected with the corresponding secondary positive output end of the transformer, and the output end of the sixth diode is connected with one end of the first resistor, one end of the first capacitor and the load voltage positive output port; the input end of the first voltage stabilizing tube is connected with the secondary side inverting output end of the corresponding transformer, one end of the second capacitor and the load voltage inverting output port; the other end of the first resistor, the other end of the first capacitor, the other end of the second capacitor and the output end of the first voltage stabilizing tube are grounded.
9. A power supply comprising a drive power supply circuit as claimed in any one of claims 1 to 8.
10. An electronic device comprising the drive power supply circuit according to any one of claims 1-8 or the power supply according to claim 9.
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