CN219304707U - Output regulating circuit - Google Patents
Output regulating circuit Download PDFInfo
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- CN219304707U CN219304707U CN202223216988.4U CN202223216988U CN219304707U CN 219304707 U CN219304707 U CN 219304707U CN 202223216988 U CN202223216988 U CN 202223216988U CN 219304707 U CN219304707 U CN 219304707U
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Abstract
The application discloses output regulating circuit is applied to electronic circuit technical field, includes: the winding module comprises a primary coil, a first secondary coil and at least one second secondary coil, wherein the first secondary coil and the second secondary coil are connected in series, and electromagnetic coupling exists between the primary coil and the first secondary coil and between the primary coil and the second secondary coil; the switch module is at least provided with one, and the switch module is arranged corresponding to the second secondary coil and is connected in series with the corresponding second secondary coil. According to the control circuit, the quantity of the second secondary coils connected with the first secondary coils in series is adjusted through the connection and disconnection of the control switch module, the turn ratio between the primary coils and the secondary coils is adjusted, the output voltage value of the output adjusting circuit is adjusted, the requirements of different electronic devices and electronic devices with variable voltage requirements can be met, the output adjusting efficiency is improved, and the use requirements of users are further met.
Description
Technical Field
The utility model relates to the technical field of electronic circuits, in particular to an output regulating circuit.
Background
In daily life, the power supply voltage is not matched with the voltage, power and the like of electronic equipment, and an output regulating circuit is required to realize voltage conversion, so that multiple functions such as impedance matching, power synthesis and the like are realized. In the prior art, the output regulating circuit generally uses the coil winding to realize voltage conversion, however, the coil turns ratio of the coil winding is fixedly arranged, for example, the coil turns ratio of the traditional power topology and the transformer circuit is a fixed value, and the output regulating circuit can only be suitable for voltage conversion between the same type of electronic equipment and has lower efficiency.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the embodiment of the application provides an output adjusting circuit which can realize the output of various voltage values, improve the efficiency and meet the requirements of related electronic equipment.
The application provides an output regulating circuit, comprising:
the winding module comprises a primary coil, a first secondary coil and at least one second secondary coil, wherein the first secondary coil and the second secondary coil are connected in series, and electromagnetic coupling exists between the primary coil and the first secondary coil and between the primary coil and the second secondary coil;
the switch module is at least provided with one, the switch module is correspondingly arranged with the second secondary coil, the switch module is connected with the corresponding second secondary coil in series, and the switch module is used for adjusting the number of the second secondary coils connected with the first secondary coil in series.
According to the output regulating circuit provided by the application, the output regulating circuit has at least the following beneficial effects: in the working process of the output regulating circuit, when the switch module is turned on, the number of second secondary coils connected in series with the first secondary coil is increased, the number of turns of the corresponding secondary coils is increased, so that the turn ratio of the primary coils to the secondary coils is reduced, the voltage of the secondary coils is increased, the voltage output by the output regulating circuit is increased, when the switch module is turned off, the number of turns of the corresponding secondary coils is reduced, the turn ratio of the primary coils to the secondary coils is increased, the voltage of the secondary coils is reduced, the voltage output by the output regulating circuit is reduced, and the turn ratio between the primary coils and the secondary coils is regulated by controlling the turn ratio between the turn-on and turn-off of the switch module, so that the regulation of the output voltage value of the output regulating circuit is realized, the output of various voltage values is realized, the requirements of different electronic equipment and electronic equipment with power transformation voltage requirements are met, the output regulating efficiency is improved, and the use requirements of users are further met.
According to some embodiments of the present application, the output adjusting circuit is provided with a voltage input interface and a voltage output interface, the positive pole of the voltage input interface is connected with the input end of the primary coil, the negative pole of the voltage input interface is connected with the output end of the primary coil, the positive pole of the voltage output interface is connected with the output end of the first secondary coil and the output end of the second secondary coil respectively, the negative pole of the voltage output interface is connected with the input end of the first secondary coil or the input end of the second secondary coil, the switch module is arranged between the output end of the corresponding second secondary coil and the positive pole of the voltage output interface, the voltage output interface is used for being connected with an external power supply module, and the voltage output interface is used for being connected with an external output module.
According to some embodiments of the present application, the switching module includes a first transistor and a turn ratio control unit, a collector of the first transistor is connected to an output end of the corresponding second secondary winding, an emitter of the first transistor is connected to a positive electrode of the voltage output interface, and a base of the first transistor is connected to the turn ratio control unit.
According to some embodiments of the present application, the turn-on ratio control unit includes a second transistor, a third transistor, a conductive power supply, and a control voltage source, a collector of the second transistor is connected to a base of the first transistor, an emitter of the second transistor is connected to an output of the conductive power supply, an input of the conductive power supply is connected to an emitter of the first transistor, a base of the second transistor is connected to a collector of the third transistor, an emitter of the third transistor is grounded, and a base of the third transistor is connected to the control voltage source.
According to some embodiments of the application, the on-power supply is arranged as an auxiliary coil, between which there is an electromagnetic coupling with the primary coil.
According to some embodiments of the present application, the loop ratio control unit further includes a first resistor, a second resistor, and a third resistor, the first resistor is disposed between the output terminal of the on power supply and the emitter of the second transistor, the second resistor is disposed between the emitter and the base of the second transistor, and the third resistor is disposed between the base of the second transistor and the collector of the third transistor.
According to some embodiments of the present application, the turn ratio control unit further includes a first capacitor and a second capacitor, the first capacitor is disposed between the output terminal and the input terminal of the on power supply, and the second capacitor is disposed between the emitter of the first transistor and the collector of the second transistor.
According to some embodiments of the present application, the second secondary coil is set to one, the input end of the first secondary coil is connected with the negative electrode of the voltage output interface, the output end of the first secondary coil is connected with the input end of the second secondary coil, and the output end of the first secondary coil is connected with the positive electrode of the voltage output interface, the output end of the second secondary coil is connected with one end of the switch module, and the other end of the switch module is connected with the positive electrode of the voltage output interface.
According to some embodiments of the present application, the second secondary coil is set to one, an input end of the second secondary coil is connected with a negative electrode of the voltage output interface, an output end of the second secondary coil is connected with an input end of the first secondary coil, an output end of the second secondary coil is connected with one end of the switch module, the other end of the switch module is connected with a positive electrode of the voltage output interface, and an output end of the first secondary coil is connected with a positive electrode of the voltage output interface.
According to some embodiments of the present application, the winding module further includes a plurality of diodes, an input end of the diode is connected with the output end of the first secondary coil or the corresponding second secondary coil, an output end of the diode is connected with the positive electrode of the voltage output interface, and the switch module is disposed between the corresponding diode and the positive electrode of the voltage output interface.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the related art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person having ordinary skill in the art.
FIG. 1 is a schematic diagram of a prior art asymmetric half-bridge flyback power converter according to an embodiment of the present application;
FIG. 2 is a schematic circuit diagram of an output regulator circuit provided in an embodiment of the present application;
fig. 3 is another circuit schematic of the output adjusting circuit according to the embodiment of the present application.
Reference numerals:
a winding module 100; a switch module 200; a power module 300; and an output module 400.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to one skilled in the art that the embodiments of the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the embodiments of the present application with unnecessary detail.
It should be noted that although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different from that in the flowchart. 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 similar elements and not necessarily for describing a particular sequential or chronological order.
It should also be appreciated that references to "one embodiment" or "some embodiments" or the like described in the specification of embodiments of the present application mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
In the description of the embodiments of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly, and those skilled in the art may reasonably determine the specific meaning of the terms in the embodiments of the present application in combination with the specific contents of the technical solutions.
In daily life, the power supply voltage is not matched with the voltage, power and the like of electronic equipment, and an output regulating circuit is required to realize voltage conversion, so that multiple functions such as impedance matching, power synthesis and the like are realized. In the prior art, the output regulating circuit generally uses the coil winding to realize voltage conversion, however, the coil turns ratio of the coil winding is fixedly arranged, for example, the coil turns ratio of the traditional power topology and the transformer circuit is a fixed value, and the output regulating circuit can only be suitable for voltage conversion between the same type of electronic equipment and has lower efficiency. In addition, the existing output adjusting circuit cannot be applied to the electronic equipment with variable voltage requirements. For example, USB (Universal Serial Bus ) is provided with the PD3.1 fast charge standard, which specifications require an output voltage of 5 to 48 volts, however, the conventional power supply topology and the coil turns ratio of the transformer lines are fixed and cannot achieve the wide output voltage range required in PD 3.1.
Referring to fig. 1, fig. 1 is a schematic circuit diagram of an existing asymmetric half-bridge flyback power converter according to an embodiment of the present application. As can be seen from fig. 1, the asymmetric half-bridge flyback power converter has a fixed number of turns of the primary coil and the secondary coil, and thus has a fixed coil turns ratio, and thus is suitable for voltage conversion between the same type of electronic devices.
Based on this, the embodiment of the application provides an output adjusting circuit. The output regulating circuit provided by the embodiment of the application can regulate the turn ratio of the coil through controlling the on-off of the switch module, and further control the magnitude of the output voltage.
Embodiments of the present application are further described below with reference to the accompanying drawings.
Referring to fig. 2 and 3, an output adjusting circuit provided in an embodiment of the present application includes a winding module 100 and a switching module 200.
The winding module 100 includes a primary coil a, a first secondary coil B1, and at least one second secondary coil B2, the first secondary coil B1 and the second secondary coil B2 being connected in series, and electromagnetic coupling exists between the primary coil a and the first secondary coil B1, the second secondary coil B2.
At least one switch module 200 is disposed, the switch module 200 is disposed corresponding to the second secondary coil B2, and the switch module 200 is connected in series with the corresponding second secondary coil B2, and the switch module 200 is used for adjusting the number of the second secondary coils B2 connected in series with the first secondary coil B1.
It should be noted that, in the working process of the output adjusting circuit provided in this embodiment of the present application, when the switch module 200 is turned on, the number of the second secondary coils B2 connected in series with the first secondary coil B1 increases, the number of turns of the corresponding secondary coil increases, so that the turn ratio between the primary coil a and the secondary coil decreases, the voltage of the secondary coil increases, the voltage output by the output adjusting circuit increases, when the switch module 200 is turned off, the number of the second secondary coils B2 connected in series with the first secondary coil decreases, the number of turns of the corresponding secondary coils decreases, so that the turn ratio between the primary coil a and the secondary coil increases, the voltage of the secondary coil decreases, the voltage output by the output adjusting circuit decreases.
The coil turns ratio of the secondary coil is the sum of the coil turns ratio of the first secondary coil B1 and the second secondary coil B2 connected in series with the first secondary coil B1.
It should be noted that the output adjusting circuit provided in the embodiments of the present application may be applied to various circuits, such as Flyback converter (flyback converter), AHB Flyback converter (Asymmetrical half-bridge flyback converter, asymmetric half-bridge flyback power converter), and the like.
It should be noted that the switch module 200 in the embodiment of the present application may use different components to implement the functions thereof, for example, a simple switch, a transistor, and the like.
The number of the coil turns ratio values that the output adjustment circuit can adjust is larger, that is, the voltage value output by the output adjustment circuit is larger, when the number of the second secondary coils B2 connected in series with the first secondary coil B1 is larger. In addition, the switch module 200 is disposed corresponding to the second secondary winding B2, and the number of the second secondary windings B2 and the switch module 200 may be set according to practical applications, which is not limited in the present application.
It will be appreciated that referring to fig. 2, the output adjusting circuit is provided with a voltage input interface and a voltage output interface, wherein the positive electrode of the voltage input interface is connected with the input end of the primary coil a, the negative electrode of the voltage input interface is connected with the output end of the primary coil a, the positive electrode of the voltage output interface is respectively connected with the output ends of the first secondary coil B1 and the second secondary coil B2, the negative electrode of the voltage output interface is connected with the input end of the first secondary coil B1 or the input end of the second secondary coil B2, the switch module 200 is arranged between the output end of the corresponding second secondary coil B2 and the positive electrode of the voltage output interface, the voltage output interface is used for being connected with the external power supply module 300, and the voltage output interface is used for being connected with the external output module 400.
It should be noted that, the power module 300 may be set as required, and generally, the output capacitor Cout is used as the output module 400, which is equivalent to connecting the output capacitor Cout in parallel with the secondary winding, and the voltage value on the output capacitor Cout is the output voltage value of the output conversion circuit.
It should be noted that, the negative electrode of the voltage output interface may be grounded, so as to facilitate connection of the output adjusting circuit and connection with the output module 400.
As will be appreciated, referring to fig. 2, the switching module 200 includes a first transistor Q1 and a turn ratio control unit, the collector of the first transistor Q1 is connected to the output terminal of the corresponding second secondary winding B2, the emitter of the first transistor Q1 is connected to the positive electrode of the voltage output interface, and the base of the first transistor Q1 is connected to the turn ratio control unit.
The turn ratio control unit is used for controlling the turn-on of the first transistor Q1, the base electrode of the first transistor Q1 is connected with the turn ratio control unit, when the voltage provided by the turn ratio control unit to the first transistor Q1 is larger than the turn-on voltage of the first transistor Q1, the first secondary winding B1 is connected with the corresponding second secondary winding B2 in series, the number of turns of the corresponding secondary winding is increased, the turn ratio of the primary winding a to the secondary winding is reduced, the voltage of the secondary winding is increased, the voltage output by the output regulating circuit is increased, when the voltage provided by the turn ratio control unit to the first transistor Q1 is insufficient, the first transistor Q1 is turned off, the connection between the first secondary winding B1 and the corresponding second secondary winding B2 is disconnected, the number of turns of the corresponding secondary winding is reduced, the turn ratio of the primary winding a to the secondary winding is increased, the voltage of the secondary winding is reduced, and the voltage output by the output regulating circuit is reduced.
The first transistor Q1 is a field effect transistor, which is a voltage control element. The fourth resistor R4 is disposed between the emitter and the base of the first transistor Q1, and the resistance between the emitter and the base of the field effect transistor is very large, so that only a small amount of static electricity can generate very high voltages at two ends of the equivalent capacitance between the emitter and the base, if the small amount of static electricity is not discharged in time, the high voltages at two ends can possibly cause malfunction of the field effect transistor, even breakdown of the emitter and the base of the field effect transistor, and the fourth resistor R4 can discharge the static electricity, thereby playing a role of protecting the field effect transistor.
It will be appreciated that referring to fig. 2, the turn ratio control unit includes a second transistor Q2, a third transistor Q3, a conductive power supply and a control voltage source GPIO, a collector of the second transistor Q2 is connected to a base of the first transistor Q1, an emitter of the second transistor Q2 is connected to an output terminal of the conductive power supply, an input terminal of the conductive power supply is connected to an emitter of the first transistor Q1, a base of the second transistor Q2 is connected to a collector of the third transistor Q3, an emitter of the third transistor Q3 is grounded, and a base of the third transistor Q3 is connected to the control voltage source GPIO.
It should be noted that the control voltage source GPIO is used to control the conduction of the third transistor Q3, and further control the conduction of the second transistor Q2, and the conduction power source is used to provide the conduction voltage for the first transistor Q1.
When the control voltage is set to be high, the third transistor Q3 is turned on, so that the second transistor Q2 is turned on, the power supply is turned on between the first transistor Q1 and the first transistor Q1, the power supply provides the first transistor Q1 with the power supply, the first transistor Q1 is turned on, the second secondary winding B2 is communicated with the output module 400, electromagnetic coupling exists between the primary winding a and the first secondary winding B1, and between the primary winding a and the corresponding second secondary winding B2, the turn ratio of the turns of the primary winding a and the sum of the turns of the first secondary winding B1 and the second secondary winding B2 is the ratio of the turns of the primary winding a and the turns of the first secondary winding B1 and the second secondary winding B2, and the voltage at the secondary winding can be obtained through the voltage value generated by the power supply module 300, and the voltage output interface is further obtained through the voltage output interface. When the control voltage is set to be low, the second transistor Q2 and the third transistor Q3 are turned off, the on power supply stops supplying power to the first transistor Q1, the first transistor Q1 is turned off, the connection between the second secondary winding B2 corresponding to the switch module 200 and the output module 400 is disconnected, the number of turns of the corresponding secondary winding is reduced, so that the turn ratio of the primary winding a to the secondary winding is increased, the voltage of the secondary winding is reduced, the voltage value input by the power module 300 and the turn ratio of the coil can be obtained, the voltage output by the output regulating circuit can be obtained, the voltage value output by the output regulating circuit can be obtained, the turn ratio of the coil is increased, and the voltage value output by the output regulating circuit is reduced compared with the case when the first transistor Q1 is turned on.
When the control voltage is set to be a high voltage, that is, the first transistor Q1 is turned on, a current generated by the on power supply flows through the collector of the second transistor Q2, the emitter of the second transistor Q2, the base of the first transistor Q1, and the emitter of the first transistor Q1, and finally flows into the on power supply to form a closed loop.
The third transistor Q3 is configured as a field effect transistor.
It will be appreciated that referring to fig. 2, the on-power supply is provided as an auxiliary coil P, with electromagnetic coupling between the auxiliary coil P and the primary coil a.
It should be noted that, the on-state power supply is the auxiliary coil P, and the number of turns of the auxiliary coil P is fixed, and there is electromagnetic coupling between the auxiliary coil P and the primary coil a, so the voltage value at the auxiliary coil P is fixed, and a stable on-state voltage can be provided for the first transistor Q1, and the number of turns of the auxiliary coil P can be set according to the on-state voltage of the first transistor Q1, the number of turns of the primary coil a, and the output voltage of the voltage module.
It is understood that referring to fig. 2, the circle ratio control unit further includes a first resistor R1, a second resistor R2, and a third resistor R3, where the first resistor R1 is disposed between the output terminal of the on power supply and the emitter of the second transistor Q2, the second resistor R2 is disposed between the emitter and the base of the second transistor Q2, and the third resistor R3 is disposed between the base of the second transistor Q2 and the collector of the third transistor Q3.
It should be noted that, the setting of the first resistor R1 is convenient for controlling the voltage at the base of the first transistor Q1, the setting of the second resistor R2 protects the second transistor Q2, and the setting of the third resistor R3 is convenient for controlling the voltage at the base of the second transistor Q2.
It will be appreciated that referring to fig. 2, the circle ratio control unit further includes a first capacitor C1 and a second capacitor C2, the first capacitor C1 is disposed between the output terminal and the input terminal of the on power supply, and the second capacitor C2 is disposed between the emitter of the first transistor Q1 and the collector of the second transistor Q2.
The first capacitor C1 and the second capacitor C2 can be further configured to control the direction in which the on power current flows.
When the control voltage is set to be high, the first transistor Q1, the second transistor Q2, and the third transistor Q3 are turned on, and the current of the turned-on power supply flows to the base of the first transistor Q1 through the first resistor R1 and the second transistor Q2, and a part of the current flows into the turned-on power supply through the first capacitor C1, then flows out from the emitter of the first transistor Q1, and finally flows into the turned-on power supply.
When the control voltage is set to be low, the first transistor Q1, the second transistor Q2, and the third transistor Q3 are turned off, and the current flowing from the output terminal of the on power supply flows into the input terminal of the on power supply through the first capacitor C1.
It will be appreciated that referring to fig. 2, the second secondary winding B2 is provided as one, the input end of the first secondary winding B1 is connected to the negative electrode of the voltage output interface, the output end of the first secondary winding B1 is connected to the input end of the second secondary winding B2, the output end of the first secondary winding B1 is connected to the positive electrode of the voltage output interface, the output end of the second secondary winding B2 is connected to one end of the switch module 200, and the other end of the switch module 200 is connected to the positive electrode of the voltage output interface.
It should be noted that, the winding module 100 in the output adjusting circuit provided in the embodiment of the present application is provided with a second secondary winding B2, and the first secondary winding B1 and the second secondary winding B2 are connected in series.
When the switch module 200 is turned on, there is electromagnetic coupling between the primary coil a and the first secondary coil B1 and the second secondary coil B2, the turns ratio of the primary coil a is the ratio of the turns of the primary coil a to the sum of the turns of the first secondary coil B1 and the second secondary coil B2, and the voltage value at the first secondary coil B1 and the second secondary coil B2 can be obtained through the voltage value and the turns ratio generated by the power module 300, so as to obtain the voltage value output by the output regulating circuit. When the switch module 200 is turned off, the connection between the second secondary coil B2 and the output module 400 is disconnected, electromagnetic coupling exists between the primary coil a and the first secondary coil B1, the turns ratio of the primary coil a is the ratio of the turns of the primary coil a to the turns of the first secondary coil B1, the voltage at the first secondary coil B1 can be obtained through the voltage value and the turns ratio generated by the power module 300, and the voltage value output by the regulating circuit is further obtained.
It will be appreciated that referring to fig. 3, the second secondary winding B2 is provided as one, the input end of the second secondary winding B2 is connected to the negative electrode of the voltage output interface, the output end of the second secondary winding B2 is connected to the input end of the first secondary winding B1, the output end of the second secondary winding B2 is connected to one end of the switch module 200, the other end of the switch module 200 is connected to the positive electrode of the voltage output interface, and the output end of the first secondary winding B1 is connected to the positive electrode of the voltage output interface.
When the switch module 200 is turned on, electromagnetic coupling exists between the primary coil a and the first and second secondary coils B1 and B2, the turns ratio of the primary coil a is the ratio of the turns of the primary coil a to the sum of the turns of the first and second secondary coils B1 and B2, the voltage value and the turns ratio of the coil generated by the power module 300 can obtain the voltage at the secondary coil, and the output module 400 is connected in parallel with the first secondary coil B1 and the second secondary coil B2, so that the voltage value output by the output regulating circuit is obtained. When the switch module 200 is turned off, the connection between the second secondary winding B2 and the output module 400 is disconnected, electromagnetic coupling exists between the primary winding a and the second secondary winding B2, the turns ratio of the primary winding a is the ratio of the turns of the primary winding a to the turns of the second secondary winding B2, the voltage at the second secondary winding B2 can be obtained through the voltage value and the turns ratio generated by the power module 300, and then the voltage value output by the regulating circuit is obtained.
It should be noted that, the switch module 200 may be connected in series with any one of the second secondary coils B2, and for a coil conversion circuit including two secondary coils, the switch module 200 may be connected in series with one of the second secondary coils B2, or two switch modules 200 may be provided, and the two switch modules 200 are respectively connected with different second secondary coils B2.
As can be appreciated, referring to fig. 2 and 3, the winding module 100 further includes a plurality of diodes, an input end of each diode is connected to the output end of the first secondary winding B1 or the corresponding second secondary winding B2, an output end of each diode is connected to the positive electrode of the voltage output interface, and the switch module 200 is disposed between the corresponding diode and the positive electrode of the voltage output interface.
It should be noted that, the first diode D1 is disposed between the output end of the first secondary winding B1 and the positive electrode of the voltage output interface, the second diode D2 is disposed between the output end of the second secondary winding B2 and the first transistor Q1, and the third diode D3 is disposed between the auxiliary winding P and the first resistor R1.
It should be noted that the embodiment of the present application may be modified based on the existing asymmetric half-bridge anti-relaxation type power converter, fig. 2 and 3 are respectively asymmetric half-bridge anti-relaxation type power converters applying two different output adjusting circuits, the asymmetric half-bridge anti-relaxation type power converter is mainly embodied in a power module 300 portion, the power module 300 includes a power supply Cin, a fourth transistor Q4, a fifth transistor Q5, a third capacitor C3 and an inductor L, an anode of the power supply Cin is connected with a collector of the fourth transistor Q4, an emitter of the fourth transistor Q4 is connected with a collector of the fifth transistor Q5, an emitter of the fifth transistor Q5 is connected with a cathode of the power supply Cin, a base of the fourth transistor Q4 is connected with a high level signal, a base of the fifth transistor Q5 is connected with a low level signal, and the inductor L, the primary coil a, the third capacitor C3 are connected in series, the inductor L, the primary coil a, the third capacitor and the fifth transistor Q5 are connected in parallel.
The components of the power module 300 and the output module 400 may be replaced as needed for different circuits.
It should be noted that, referring to fig. 2 and fig. 3, in the operation process of the output adjusting circuit provided in the embodiment of the present application, the control switch module 200 is turned on, so that the number of second secondary coils connected in parallel with the output module 400 increases, the turns ratio of the primary coil a to the secondary coil decreases, the voltage of the secondary coil increases, the voltage output by the voltage output interface increases, when the output voltage needs to be reduced, the control switch module 200 is turned off, the number of second secondary coils connected in parallel with the output module 400 decreases, the turns ratio of the primary coil a to the secondary coil decreases, the voltage of the secondary coil decreases, and the voltage of the voltage output interface decreases. The switch module 200 includes a first transistor Q1 and a loop ratio control unit, where the loop ratio control unit includes a plurality of transistors, and controls the conduction of the first transistor Q1 by controlling the conduction of the transistors in the loop ratio control unit, so as to control the number of secondary windings connected in parallel with the output module 400, thereby achieving the purpose of controlling the output voltage. According to the embodiment of the application, the turn ratio of the coil is adjusted by controlling the on/off of the switch module 200, so that the output voltage is controlled, the output of various voltage values is realized, the requirements of different electronic devices and electronic devices with variable voltage requirements can be met, the output adjustment efficiency is improved, and the use requirement of a user is further met.
The embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application. Furthermore, embodiments of the present application and features of the embodiments may be combined with each other without conflict.
Claims (10)
1. An output conditioning circuit, comprising:
the winding module comprises a primary coil, a first secondary coil and at least one second secondary coil, wherein the first secondary coil and the second secondary coil are connected in series, and electromagnetic coupling exists between the primary coil and the first secondary coil and between the primary coil and the second secondary coil;
the switch module is at least provided with one, the switch module is correspondingly arranged with the second secondary coil, the switch module is connected with the corresponding second secondary coil in series, and the switch module is used for adjusting the number of the second secondary coils connected with the first secondary coil in series.
2. The output regulating circuit according to claim 1, wherein the output regulating circuit is provided with a voltage input interface and a voltage output interface, a positive electrode of the voltage input interface is connected with an input end of the primary coil, a negative electrode of the voltage input interface is connected with an output end of the primary coil, a positive electrode of the voltage output interface is respectively connected with output ends of the first secondary coil and the second secondary coil, a negative electrode of the voltage output interface is connected with an input end of the first secondary coil or an input end of the second secondary coil, the switch module is arranged between an output end of the corresponding second secondary coil and the positive electrode of the voltage output interface, the voltage output interface is used for being connected with an external power supply module, and the voltage output interface is used for being connected with an external output module.
3. The output regulation circuit of claim 2 wherein the switching module comprises a first transistor and a turn ratio control unit, a collector of the first transistor being connected to the output of the corresponding second secondary winding, an emitter of the first transistor being connected to the positive pole of the voltage output interface, and a base of the first transistor being connected to the turn ratio control unit.
4. The output adjusting circuit according to claim 3, wherein the turn ratio control unit includes a second transistor, a third transistor, a turn-on power supply, and a control voltage source, a collector of the second transistor is connected to a base of the first transistor, an emitter of the second transistor is connected to an output of the turn-on power supply, an input of the turn-on power supply is connected to an emitter of the first transistor, a base of the second transistor is connected to a collector of the third transistor, an emitter of the second transistor is grounded, and a base of the third transistor is connected to the control voltage source.
5. The output conditioning circuit of claim 4, wherein the on-power supply is provided as an auxiliary coil, there being electromagnetic coupling between the auxiliary coil and the primary coil.
6. The output adjusting circuit as recited in claim 4, wherein the turn ratio control unit further comprises a first resistor, a second resistor, and a third resistor, the first resistor being disposed between the output of the on power supply and the emitter of the second transistor, the second resistor being disposed between the emitter and the base of the second transistor, the third resistor being disposed between the base of the second transistor and the collector of the third transistor.
7. The output conditioning circuit of claim 4, wherein the turn ratio control unit further comprises a first capacitor disposed between the output and input of the on power supply and a second capacitor disposed between the emitter of the first transistor and the collector of the second transistor.
8. The output adjusting circuit according to claim 2, wherein the second secondary coil is provided as one, an input end of the first secondary coil is connected to a negative electrode of the voltage output interface, an output end of the first secondary coil is connected to an input end of the second secondary coil, an output end of the first secondary coil is connected to a positive electrode of the voltage output interface, an output end of the second secondary coil is connected to one end of the switching module, and the other end of the switching module is connected to a positive electrode of the voltage output interface.
9. The output adjusting circuit according to claim 2, wherein the second secondary coil is provided as one, an input end of the second secondary coil is connected to a negative electrode of the voltage output interface, an output end of the second secondary coil is connected to an input end of the first secondary coil, an output end of the second secondary coil is connected to one end of the switching module, the other end of the switching module is connected to a positive electrode of the voltage output interface, and an output end of the first secondary coil is connected to a positive electrode of the voltage output interface.
10. The output conditioning circuit of claim 2, wherein the winding module further comprises a plurality of diodes, an input of the diodes being connected to an output of the first secondary coil or the corresponding second secondary coil, an output of the diodes being connected to an anode of the voltage output interface, the switching module being disposed between the corresponding diodes and the anode of the voltage output interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223216988.4U CN219304707U (en) | 2022-11-30 | 2022-11-30 | Output regulating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223216988.4U CN219304707U (en) | 2022-11-30 | 2022-11-30 | Output regulating circuit |
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| Publication Number | Publication Date |
|---|---|
| CN219304707U true CN219304707U (en) | 2023-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223216988.4U Active CN219304707U (en) | 2022-11-30 | 2022-11-30 | Output regulating circuit |
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| Country | Link |
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| CN (1) | CN219304707U (en) |
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