CN218335404U - Power supply circuit, auxiliary power supply circuit and electronic equipment - Google Patents
Power supply circuit, auxiliary power supply circuit and electronic equipment Download PDFInfo
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Abstract
The application provides a power supply circuit, an auxiliary source circuit and an electronic device. The power supply circuit comprises a starting circuit, a main control circuit and a power supply output circuit; the main control circuit is used for being connected with the first power supply, starting when receiving a power supply electric signal input by the first power supply and outputting a reference electric signal to the starting circuit; the starting circuit comprises an energy storage module, is used for charging the energy storage module by using a reference electric signal when receiving the reference electric signal, and outputs control voltage to the main control circuit according to the energy storage voltage of the energy storage module in the charging process of the energy storage module; the main control circuit is also used for outputting a pulse control signal to the power output circuit when the control voltage is greater than or equal to the preset reference voltage; the power output circuit is used for connecting a second power supply and converting the electric energy of the second power supply into alternating voltage to be output under the action of the pulse control signal. According to the method and the device, the slow start of the power supply circuit can be realized, and the problem of poor starting stability of the power supply circuit is solved.
Description
Technical Field
The application relates to the technical field of power supplies, in particular to a power supply circuit, an auxiliary source circuit and electronic equipment.
Background
In a power supply circuit of an electronic device, an auxiliary source circuit is used for providing voltage required by the work of the power supply circuit at the initial stage of the start of the circuit and stopping power supply after the output of the circuit is stable, a power supply circuit of the auxiliary source circuit is used for providing power supply voltage required by an auxiliary power supply and generating coupling voltage in other connected voltage transformation circuits in a transformer, and then other voltage transformation circuits carry out voltage transformation on the coupling voltage to output target voltage.
SUMMERY OF THE UTILITY MODEL
The main aim at of this application provides a supply circuit, auxiliary power circuit and electronic equipment, aims at realizing the slow start of circuit, avoids the electric current impact that the circuit suddenly starts the production.
In a first aspect, the present application provides a power supply circuit, including a start circuit, a main control circuit, and a power output circuit;
the main control circuit is connected with the first power supply, and is used for starting when receiving a power supply electric signal input by the first power supply and outputting a reference electric signal to the starting circuit;
the starting circuit comprises an energy storage module, is used for charging the energy storage module by using a reference electric signal when receiving the reference electric signal, and outputs control voltage to the main control circuit according to the energy storage voltage of the energy storage module in the charging process of the energy storage module;
the main control circuit is also used for outputting a pulse control signal to the power output circuit when the control voltage is greater than or equal to the preset reference voltage, and the duty ratio of the pulse control signal is in direct proportion to the magnitude of the control voltage;
and the power output circuit is used for connecting a second power supply and converting the electric energy of the second power supply into alternating voltage for output under the action of the pulse control signal.
In one embodiment, the start-up circuit further comprises a current limiting module;
the first end of the energy storage module is connected with the controlled end of the main control circuit, and the second end of the energy storage module is grounded;
the first end of the current limiting module is connected with the reference electrical signal output end of the main control circuit, and the second end of the current limiting module is connected with the first end of the energy storage module;
the current limiting module is used for receiving the reference electric signal, limiting the current of the reference electric signal and charging the energy storage module.
In one embodiment, the start-up circuit further comprises a reverse prevention module; the anti-reverse module is connected between the first end of the energy storage module and the controlled end of the main control circuit; the anti-reverse module is used for preventing the charging current generated by the reference electric signal from flowing backwards to the controlled end of the main control circuit.
In one embodiment, the anti-reverse module comprises a diode, wherein the anode of the diode is connected with the controlled end of the main control circuit, and the cathode of the diode is connected with the first end of the energy storage module.
In one embodiment, the power output circuit comprises an alternating output module and a switching tube module; the first end of the alternating output module is used for being connected with a second power supply, the second end of the alternating output module is connected with the first end of the switch tube module, the second end of the switch tube module is grounded, and the controlled end of the switch tube module is connected with the main control circuit; the switch tube module is used for switching on and switching off under the effect of the pulse control signal, so that the second power supply forms alternating voltage on the alternating output unit and then outputs the alternating voltage, and the voltage magnitude of the alternating voltage is positively correlated with the duty ratio of the pulse control signal.
In one embodiment, the alternating output module comprises a voltage stabilizing unit, a filtering unit, an alternating output unit and a bleeding unit;
the first end of the alternating output unit is connected with the voltage stabilizing unit, and the second end of the alternating output unit is connected with the switching tube module;
the voltage stabilizing unit is used for being connected with a second power supply and conducting when the voltage input by the second power supply is greater than a preset voltage threshold;
the alternating output unit is used for converting the electric energy output by the voltage stabilizing unit into alternating voltage and outputting the alternating voltage;
the filtering unit is connected with the voltage stabilizing unit and is used for filtering the electric energy input by the second power supply;
the discharge unit is connected between the first end and the second end of the alternating output unit and used for absorbing discharge energy of the alternating output unit when the switching tube module is turned off.
In one embodiment, the power supply circuit further comprises a voltage divider circuit; the first end of the voltage division circuit is used for connecting a third power supply, the second end of the voltage division circuit is grounded, and the voltage division end of the voltage division circuit is connected with the main control circuit;
the voltage division circuit is used for receiving the electric energy of the third power supply, converting the electric energy received by the third power supply into feedback voltage and outputting the feedback voltage to the main control circuit;
the main control circuit is also used for outputting a pulse control signal to the power output circuit according to the control voltage and the feedback voltage when the control voltage is greater than or equal to the preset reference voltage.
In one embodiment, the voltage divider circuit comprises a first resistor and a second resistor, one end of the first resistor is used for connecting a third power supply, and the other end of the first resistor is connected with the second resistor in series and grounded; the voltage division end is positioned between the first resistor and the second resistor.
In an embodiment, the power supply circuit further includes a filter circuit, a first end of the filter circuit is connected to the controlled end of the main control circuit, and a second end of the filter circuit is grounded.
In a second aspect, the present application provides an auxiliary source circuit, including the power supply circuit provided in the above embodiment and at least one voltage conversion circuit, where the power supply circuit is electrically connected to the at least one voltage conversion circuit, and the at least one voltage conversion circuit is configured to convert an alternating voltage output by the power supply circuit and output the converted alternating voltage.
In a third aspect, the present application provides an electronic device including the auxiliary power supply circuit provided in the above embodiment.
The application provides a power supply circuit, which comprises a starting circuit, a main control circuit and a power supply output circuit; the main control circuit is connected with the first power supply, and is used for starting when receiving a power supply electric signal input by the first power supply and outputting a reference electric signal to the starting circuit; the starting circuit comprises an energy storage module, is used for charging the energy storage module by using a reference electric signal when receiving the reference electric signal, and outputs control voltage to the main control circuit according to the energy storage voltage of the energy storage module in the charging process of the energy storage module; the main control circuit is also used for outputting a pulse control signal to the power output circuit when the control voltage is greater than or equal to the preset reference voltage, and the duty ratio of the pulse control signal is in direct proportion to the magnitude of the control voltage; the power supply output circuit is used for connecting a second power supply and converting the electric energy of the second power supply into alternating voltage for output under the action of the pulse control signal; the method comprises the steps that a reference electric signal is used for charging an energy storage module, a control voltage is output to a main control circuit according to the energy storage voltage of the energy storage module, and when the control voltage is larger than or equal to a preset reference voltage, the main control circuit outputs a pulse control signal to a power output circuit, so that the power output circuit converts the electric energy of a second power supply into alternating voltage to be output; because the duty ratio of the pulse control signal is in direct proportion to the magnitude of the control voltage, the slow start of the power supply circuit can be realized, so that the large current impact generated by the circuit start is avoided, the start stability of the power supply circuit is improved, the auxiliary source circuit is prevented from being damaged, and the purpose of protecting the power supply circuit is achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic block diagram of a structure of a power supply circuit according to an embodiment of the present application;
fig. 2 is a schematic block diagram of a structure of a power supply circuit according to an embodiment of the present application;
FIG. 3 is a schematic block diagram of a power supply circuit according to another embodiment of the present application;
fig. 4 is a schematic block diagram of a structure of a power supply circuit according to another embodiment of the present application;
fig. 5 is a schematic block diagram of a power supply circuit according to another embodiment of the present application;
fig. 6 is a schematic block diagram of a power supply circuit according to another embodiment of the present application;
fig. 7 is a schematic block diagram of a power supply circuit according to yet another embodiment of the present application;
fig. 8 is a schematic structural diagram of a power supply circuit according to an embodiment of the present application;
fig. 9 is a schematic block diagram of a circuit in an auxiliary power supply circuit according to an embodiment of the present application.
Description of reference numerals:
10. a master control circuit; 20. a start-up circuit; 30. a power supply output circuit;
21. an energy storage module; 22. a current limiting module; 23. an anti-reversion module;
31. a switching tube module; 32. an alternating output module; 321. an alternating output unit;
322. a voltage stabilization unit; 323. a filtering unit; 324. a bleeding unit;
40. a voltage dividing circuit; 50. a filter circuit; 100. a power supply circuit.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments and features of the embodiments described below can be combined with each other without conflict.
In the auxiliary power circuit, a power supply circuit can be arranged, and the power supply circuit is used for providing voltage required by circuit operation at the initial stage of circuit starting and stopping power supply after circuit output is stable.
Referring to fig. 1, fig. 1 is a schematic block diagram illustrating a structure of a power supply circuit 100 according to an embodiment of the present disclosure. As shown in fig. 1, the power supply circuit 100 includes a start circuit 20, a main control circuit 10, and a power output circuit 30. The main control circuit 10 is configured to be connected to a first power supply VCC1, and start when receiving a power supply electrical signal input by the first power supply VCC1, and output a reference electrical signal to the start circuit 20. In a specific implementation, the main control circuit 10 may output a reference electrical signal to the start-up circuit 20 through the reference electrical signal output terminal VREF. The starting circuit 20 includes an energy storage module 21, and the starting circuit 20 is configured to charge the energy storage module 21 by using the reference electrical signal when receiving the reference electrical signal, and output a control voltage to the main control circuit 10 according to the energy storage voltage of the energy storage module 21 in the charging process of the energy storage module 21. The main control circuit 10 is further configured to output a pulse control signal to the power output circuit 30 when the control voltage is greater than or equal to the preset reference voltage, wherein a duty ratio of the pulse control signal is proportional to a magnitude of the control voltage. The power output circuit 30 is used for connecting the second power source and converting the electric energy of the second power source into alternating voltage to be output under the action of the pulse control signal.
Exemplarily, the main control circuit 10 is connected to the first power VCC1 through a power source terminal VCC, the first power VCC1 is configured to supply power to the main control circuit 10, and when receiving a power supply electrical signal input by the first power VCC1, the main control circuit 10 can output a reference electrical signal to the start circuit 20, specifically, the main control circuit 10 outputs the reference electrical signal to the energy storage module 21 in the start circuit 20 to charge the energy storage module 21, and in a charging process of the energy storage module 21, the energy storage module 21 can output a control voltage to the main control circuit 10, thereby controlling the main control circuit 10 to output a pulse control signal. In a specific implementation process, the energy storage module 21 outputs a control voltage to the controlled terminal COMPN of the main control circuit 10, so that the main control circuit 10 outputs a corresponding pulse control signal at the output terminal OUT according to the control voltage.
It should be noted that the starting circuit 20 is configured to charge the energy storage module 21 with the reference electrical signal when receiving the reference electrical signal, and the control voltage is increased along with the increase of the energy storage voltage in the process of charging the energy storage module 21 with the reference electrical signal. When the control voltage is greater than or equal to the preset reference voltage, the main control circuit 10 outputs a corresponding pulse control signal to the power output circuit 30, and the duty ratio of the pulse control signal is proportional to the magnitude of the control voltage, so that the duty ratio of the pulse control signal is also increased along with the increase of the control voltage.
For example, the energy storage module 21 may include a capacitor, and the second power source may be an ac power source, such as a generator power source or a commercial power source, or a dc power source, such as a battery power source or a solar power source.
Illustratively, the magnitude of the control voltage received by the main control circuit 10 is directly proportional to the duty ratio of the output pulse control signal, and it can be understood that, in the charging process of the energy storage module 21, the duty ratio of the pulse control signal output by the main control circuit 10 increases along with the increase of the control voltage, so that the alternating voltage output by the power output circuit 30 increases along with the duty ratio of the pulse control signal, thereby realizing the slow start of the circuit, avoiding the switch tube in the power supply circuit 100 from being started at the maximum duty ratio when the power supply circuit 100 is started, avoiding the impact of the large current generated by the power supply circuit 100 on the circuit, improving the stability of the circuit, and avoiding damaging the power supply circuit, thereby achieving the purpose of protecting the power supply circuit.
Referring to fig. 2, fig. 2 is a schematic block diagram illustrating a structure of a power supply circuit 100 according to an embodiment of the present disclosure.
In some embodiments, the startup circuit 20 further includes a current limiting module 22; the first end of the energy storage module 21 is connected with the controlled end of the main control circuit 10, and the second end of the energy storage module 21 is grounded; a first end of the current limiting module 22 is connected to the reference electrical signal output end of the main control circuit 10, and a second end of the current limiting module 22 is connected to a first end of the energy storage module 21; the current limiting module 22 is configured to receive the reference electrical signal, limit a current of the reference electrical signal, and charge the energy storage module 21.
For example, current limiting module 22 may include a current limiting resistor. The stability of the power supply circuit 100 may be improved by limiting the reference electrical signal through the current limiting resistor.
Referring to fig. 3, fig. 3 is a schematic block diagram of a power supply circuit 100 according to another embodiment of the present disclosure.
In some embodiments, the start-up circuit 20 further comprises a kickback prevention module 23; the anti-reverse module 23 is connected between the first end of the energy storage module 21 and the controlled end COMPN of the main control circuit 10.
For example, an anti-reverse module 23 may be disposed between the first end of the energy storage module 21 and the controlled terminal COMPN of the main control circuit 10 to prevent the charging current generated by the reference electrical signal from flowing into the controlled terminal COMPN of the main control circuit 10, so as to prevent the main control circuit 10 from being directly controlled by the reference electrical signal, which may result in that the slow start cannot be achieved.
In some embodiments, the anti-reflection module 23 includes a diode; the anode of the diode is connected to the controlled terminal comp of the main control circuit 10, and the cathode of the diode is connected to the first end of the energy storage module 21.
For example, a diode with a unidirectional conduction function may be used as the anti-reverse module 23, so as to prevent the charging current generated by the reference electrical signal from flowing backward to the controlled terminal of the main control circuit 10.
In a specific implementation process, after the main control circuit 10 receives the electric energy input by the first power source VCC1, a reference electrical signal is output at the reference electrical signal output terminal VREF. After the current of the reference electrical signal is limited by the current limiting module 22, the reference electrical signal is input to the energy storage module 21, at this time, since there is no energy stored in the energy storage module 21, which is equivalent to a conduction state, the voltage of the cathode of the diode is 0V, and the control voltage of the controlled terminal COMPN of the main control circuit 10 is 0.7V of the voltage drop on the diode, the main control circuit 10 determines that the control voltage is smaller than the preset reference voltage, so that the pulse control signal is not output.
As the energy storage module 21 is charged, the voltage of the cathode of the diode increases with the increase of the charging time, and meanwhile, the control voltage of the controlled terminal comp of the main control circuit 10 increases with the increase of the voltage of the cathode of the diode; in a specific implementation process, the control voltage of the controlled terminal COMPN of the main control circuit 10 starts to increase from 0.7V, and when the control voltage of the controlled terminal COMPN of the main control circuit 10 increases to be greater than or equal to a preset reference voltage, the main control circuit 10 outputs a pulse control signal according to the control voltage, and a duty ratio of the pulse control signal also increases along with the increase of the control voltage, so that the slow start of the power supply circuit 100 is realized.
For example, the preset reference voltage may be set according to a specific application, and the application is not limited thereto. In one embodiment, the preset reference voltage may be set to 1V.
Referring to fig. 4, fig. 4 is a schematic block diagram of a power supply circuit 100 according to another embodiment of the present disclosure.
In some embodiments, the power output circuit 30 includes an alternating output module 32 and a switching tube module 31; the first end of the alternating output module 32 is used for connecting a second power supply, the second end of the alternating output module 32 is connected with the first end of the switch tube module 31, the second end of the switch tube module 31 is grounded, and the controlled end of the switch tube module 31 is connected with the main control circuit 10.
It can be understood that the switching tube module 31 can be turned on and off under the action of the pulse control signal, and in the specific implementation process, the main control circuit 10 controls the switching tube module 31 to be turned on at the duty ratio of the pulse control signal through the pulse control signal, so as to control the voltage of the alternating voltage formed on the alternating output module 32. That is, when the duty ratio of the pulse control signal is small, the alternating voltage formed on the alternating output module 32 is also small, and along with the charging of the energy storage module 21, the control voltage received by the main control circuit 10 gradually increases along with the energy storage voltage of the energy storage module 21, so that the duty ratio of the pulse control signal output by the main control circuit 10 gradually increases along with the control voltage, the switching tube module 31 is turned on under the action of the pulse control signal, so that the alternating voltage formed by the second power supply on the alternating output module 32 also increases along with the increase of the duty ratio of the pulse control signal, and the slow start of the power supply circuit 100 is realized.
It should be noted that, after the energy storage module 21 is charged for a certain time, it reaches a full power state, at this time, the control voltage output by the energy storage module 21 to the main control circuit 10 is a constant value, and the duty ratio of the pulse control signal output by the main control circuit 10 is constant, so that the alternating voltage formed by the second power supply on the alternating output module 32 is a certain value, so as to achieve the purpose that the power supply circuit 100 outputs a stable alternating voltage.
For example, when receiving the control voltage corresponding to the above constant value, the main control circuit 10 outputs a pulse control signal with a maximum duty ratio, so that the power supply circuit 100 stably outputs the alternating voltage.
Illustratively, the switching tube module 31 may include a field effect transistor to control the voltage magnitude of the alternating voltage formed on the alternating output module 32 by the second power source through the pulse control signal.
Referring to fig. 5, fig. 5 is a schematic block diagram of a power supply circuit 100 according to another embodiment of the present disclosure.
In some embodiments, the alternating output module 32 includes a voltage stabilization unit 322, a filtering unit 323, an alternating output unit 321, and a bleeding unit 324. Wherein, the first end of the alternating output unit 321 is connected to the voltage stabilizing unit 322, and the second end of the alternating output unit 321 is connected to the switching tube module 31; the voltage stabilizing unit 322 is configured to connect to the second power source VCC2, and is turned on when a voltage input by the second power source VCC2 is greater than a preset voltage threshold; the alternating output unit 321 is configured to convert the electric energy output by the voltage stabilizing unit 322 into an alternating voltage and output the alternating voltage; the filtering unit 323 is further connected to the voltage stabilizing unit 322, and is configured to filter the electric energy input by the second power source VCC 2; the bleeding unit 324 is connected between the first end and the second end of the alternating output unit 321, and is used for absorbing the bleeding energy of the alternating output unit 321 when the switch tube module 31 is turned off.
Illustratively, the second power source VCC2 inputs power to the voltage stabilizing unit 322 in the alternating current output module 32, and when the input power needs to be greater than the preset voltage threshold, the input power can be input to the alternating current output unit 321 through the voltage stabilizing unit 322 to ensure that the second power source VCC2 is not over-discharged.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a power supply circuit 100 according to an embodiment of the present disclosure.
In a specific implementation, the voltage stabilizing unit 322 includes a first diode D1 and a second diode D2, and the first diode D1 is connected in series with the second diode D2 and is connected between the alternating output unit 321 and the second power source VCC 2. The anode of the first diode D1 is used for connecting the second power source VCC2, the cathode of the first diode D1 is used for connecting the anode of the second diode, and the cathode of the second diode D2 is connected to the alternating output unit 321, so that when the voltage input by the second power source VCC2 is greater than the preset voltage threshold, the first diode D1 and the second diode D2 are turned on, and the second power source VCC2 is prevented from being over-discharged.
Illustratively, the voltage stabilizing unit 322 is further connected to the filtering unit 323, wherein the filtering unit 323 may filter the power input by the second power source VCC2 to ensure stability of the input power.
In a specific implementation, with reference to fig. 6, the filter unit 323 includes a first capacitor C1 and a second capacitor C2 connected in parallel, and one end of the filter unit 323 is connected between the first diode D1 and the second diode D2, and the other end is grounded.
Illustratively, the alternating output unit 321 is configured to convert the electric energy output by the voltage stabilizing unit 322 into an alternating voltage and output the alternating voltage, and it can be understood that the alternating output unit 321 is further controlled by the conduction state of the switching tube module 31, so that the voltage of the alternating voltage converted by the alternating output unit 321 can be adjusted by the duty ratio of the pulse control signal output by the main control circuit 10, and the adjusted alternating voltage is output by the alternating output unit 321.
In a specific implementation, with continued reference to fig. 6, the switching transistor module 31 includes a MOS transistor Q1. The grid electrode of the MOS tube Q1 is connected with the main control unit 10 through a first resistor R1, the source electrode of the MOS tube Q1 is grounded through a second resistor R2, the drain electrode of the MOS tube Q1 is connected with the alternating output unit 321, and the MOS tube Q1 is used for controlling signal conduction or disconnection according to the pulse received by the grid electrode, so that the voltage of the alternating voltage converted on the alternating output unit 321 is adjusted. The conduction duty ratio of the MOS tube Q1 is the same as the duty ratio of the pulse control signal.
Illustratively, the alternating output module 32 further includes a bleeding unit 324, and the bleeding unit 324 may absorb bleeding energy of the alternating output unit 321 when the switching tube module 31 is turned off, and in particular, when the switching tube module 31 is turned off, since energy which cannot be discharged, such as current, may also exist in the switching tube module 31 and the alternating output unit 321, energy may be bled through the bleeding unit 324.
In a specific implementation, with continued reference to fig. 6, the bleeding unit 324 includes a diode D3, a capacitor C3, and a third resistor R3. The anode of the diode is connected with the drain electrode of the triode, and the cathode of the diode is connected with the first end of the capacitor; the second end of the capacitor is connected to the input end of the alternating output unit 321, and the resistor is connected in parallel with the capacitor. In some embodiments, the bleeding unit 324 may include a plurality of resistors connected in series with each other and in parallel with the capacitor C3.
Referring to fig. 7, fig. 7 is a schematic block diagram illustrating a structure of a power supply circuit 100 according to another embodiment of the present disclosure.
In some embodiments, power supply circuit 100 further includes a voltage divider circuit 40; the first end of the voltage dividing circuit 40 is used for connecting the third power supply VCC3, the second end of the voltage dividing circuit 40 is grounded, and the voltage dividing end of the voltage dividing circuit 40 is connected to the main control circuit 10.
For example, the voltage dividing circuit 40 may be configured to receive the power of the third power source VCC3, and convert the power received from the third power source VCC3 into a feedback voltage and output the feedback voltage to the main control circuit 10; the main control circuit 10 is further configured to output a pulse control signal to the power output circuit 30 according to the control voltage and the feedback voltage when the control voltage is greater than or equal to the preset reference voltage.
For example, another voltage conversion circuit coupled to the same transformer as the power supply circuit 100 may be used as the third power supply VCC3, that is, a voltage output terminal of the voltage conversion circuit is connected to the first terminal of the voltage divider circuit 40, so that the main control circuit 10 can output a pulse control signal to the power output circuit 30 according to the feedback voltage and the control voltage, thereby ensuring that the voltage output by the power output circuit 30 is the target voltage.
In a specific implementation process, the third power VCC3 may also be used as the first power VCC1 to supply power to the main control circuit 10, and similarly, the first power VCC1 may also be a voltage output by another voltage conversion circuit or a start circuit; the second power source VCC2 mentioned above may then comprise a battery power source or a solar power source.
In some embodiments, with continued reference to fig. 6, the voltage divider circuit 40 includes a fourth resistor R4 and a fifth resistor R5, a first end of the fourth resistor R4 is used for connecting the third power source VCC3, and a second end of the fourth resistor R4 is connected to the fifth resistor; the voltage dividing end of the voltage dividing circuit 40 is connected between the fourth resistor R4 and the fifth resistor R5, the first end of the fifth resistor R5 is connected to the second end of the fourth resistor R4, and the second end of the fifth resistor R5 is grounded.
It is understood that the electric energy of the third power source VCC3 may be converted into a feedback voltage by the fourth resistor R4 and the fifth resistor R5, and the feedback voltage is outputted to be transmitted to the main control circuit 10.
In a specific implementation process, the voltage dividing circuit 40 outputs the feedback voltage to the feedback terminal FB and the controlled terminal COMPN of the main control circuit 10 through the voltage dividing terminal, so that the main control circuit can further adjust the duty ratio of the pulse control signal according to the feedback voltage.
Referring to fig. 8, fig. 8 is a schematic block diagram illustrating a structure of a power supply circuit 100 according to still another embodiment of the present disclosure.
In some embodiments, the power supply circuit 100 further includes a filter circuit 50, a first terminal of the filter circuit 50 is connected to the controlled terminal of the main control circuit 10, and a second terminal of the filter circuit 50 is grounded.
For example, the filtering circuit 50 may filter the control voltage output by the energy storage module 21 to avoid interference so as to ensure stability of the control voltage.
In a specific implementation, with continued reference to fig. 8, the filter circuit 50 may be composed of a sixth resistor R6 and a capacitor C4 connected in parallel.
It should be noted that the power supply circuit 100 in each of the above embodiments can be implemented in the manner shown in fig. 6, but the implementation of fig. 6 does not limit the power supply circuit 100 in each of the above embodiments.
For example, the power supply circuit 100 may be a power supply circuit 100 on a secondary side, and the power supply circuit 100 may also be connected to a power supply circuit on a primary side, where the primary side may be used to indicate a high voltage side and the secondary side is used to indicate a low voltage side; or the primary side is used for indicating the low-voltage side, and the secondary side is used for indicating the low-voltage side, so that the input and the output of the voltage in the power supply circuit are realized.
Illustratively, the power supply circuit 100 may be used as an AC power supply circuit, or may also be used as a DC power supply circuit 100.
The power supply circuit 100 provided above charges the energy storage module 21 by using the reference electrical signal, outputs a control voltage to the main control circuit 10 according to the energy storage voltage of the energy storage module 21, and when the control voltage is greater than or equal to a preset reference voltage, the main control circuit 10 outputs a pulse control signal to the power output circuit 30, so that the power output circuit 30 converts the electrical energy of the second power source VCC2 into an alternating voltage for output; because the duty ratio of the pulse control signal is in direct proportion to the control voltage, the slow start of the power supply circuit 100 can be realized, so that the large current impact generated by the circuit start is avoided, the start stability of the power supply circuit 100 is improved, the power supply circuit is prevented from being damaged, and the purpose of protecting the power supply circuit is achieved.
Referring to fig. 9, fig. 9 is a schematic block diagram of a circuit in an auxiliary power circuit according to an embodiment of the present disclosure.
As shown in fig. 9, the auxiliary source circuit includes a power supply circuit 100 and at least one voltage conversion circuit, where the power supply circuit 100 is electrically connected to the at least one voltage conversion circuit, and the at least one voltage conversion circuit is configured to convert an alternating voltage output by the power supply circuit 100 and output the converted alternating voltage.
For example, fig. 9 shows that the power supply circuit 100 and the first voltage conversion circuit and the second voltage conversion circuit are electrically connected through a transformer, and it can be understood that, under the understanding of those skilled in the art, other ways of electrically connecting the power supply circuit 100 and the voltage conversion circuit may also exist, and the present application is not limited thereto.
It should be noted that the power supply circuit 100 may be connected with different second power sources to serve as different power supply circuits, specifically, the second power source VCC2 connected to the power supply circuit 100 is a direct current power source, for example, in the case of a battery power source, the power supply circuit 100 may serve as a direct current power supply circuit (DC power supply circuit). In the case where the second power supply VCC2 connected to the power supply circuit 100 is an alternating current power supply, such as commercial power, the power supply circuit 100 may function as an alternating current power supply circuit (AC power supply circuit). To meet different use requirements.
For example, the specific arrangement manner of the power supply circuit 100 in the auxiliary source circuit may refer to the corresponding embodiment described in the present specification, and this embodiment is not described herein again.
The auxiliary source circuit of this application passes through supply circuit and realizes slowly starting, can avoid circuit supply circuit to start the initial stage, and too big voltage causes great current rush to auxiliary source circuit, protects auxiliary source circuit.
Another embodiment of the present application provides an electronic device including the auxiliary source circuit provided in the above embodiment.
In another embodiment, the electronic device may be a power storage device, a removable power source, or the like.
The electronic equipment provided by the application can realize the purposes of avoiding damaging the power circuit in the electronic equipment and protecting the power circuit through the slow start of the power supply circuit 100 in the auxiliary power circuit.
In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. They may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
The above disclosure provides many different embodiments or examples for implementing different structures of the application. The components and arrangements of specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present application. Further, the present application may repeat reference numerals and/or reference letters in the various examples for simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or arrangements discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above embodiments are only preferred embodiments of the present application, and the scope of the present application is not limited thereto, and any insubstantial changes and substitutions made by those skilled in the art based on the present application are intended to be covered by the present application.
Claims (10)
1. A power supply circuit is characterized by comprising a starting circuit, a main control circuit and a power supply output circuit;
the main control circuit is connected with a first power supply, and is used for starting when receiving a power supply electric signal input by the first power supply and outputting a reference electric signal to the starting circuit;
the starting circuit comprises an energy storage module, and is used for charging the energy storage module by using the reference electrical signal when receiving the reference electrical signal, and outputting a control voltage to the main control circuit according to the energy storage voltage of the energy storage module in the charging process of the energy storage module;
the main control circuit is further configured to output a pulse control signal to the power output circuit when the control voltage is greater than or equal to a preset reference voltage, wherein a duty ratio of the pulse control signal is proportional to a magnitude of the control voltage;
the power output circuit is used for connecting a second power supply and converting the electric energy of the second power supply into alternating voltage to be output under the action of the pulse control signal.
2. The power supply circuit of claim 1 wherein said startup circuit further comprises a current limiting module;
the first end of the energy storage module is connected with the controlled end of the main control circuit, and the second end of the energy storage module is grounded;
the first end of the current limiting module is connected with the reference electrical signal output end of the main control circuit, and the second end of the current limiting module is connected with the first end of the energy storage module;
the current limiting module is used for receiving the reference electric signal, limiting the current of the reference electric signal and charging the energy storage module.
3. The power supply circuit of claim 2 wherein the start-up circuit further comprises a kickback prevention module;
the anti-reverse module is connected between the first end of the energy storage module and the controlled end of the main control circuit; the anti-reverse module is used for preventing the charging current generated by the reference electric signal from flowing backwards to the controlled end of the main control circuit.
4. The power supply circuit of claim 3 wherein the anti-reverse module comprises a diode, an anode of the diode is connected to the controlled terminal of the master circuit, and a cathode of the diode is connected to the first terminal of the energy storage module.
5. The power supply circuit of any one of claims 1-4 wherein the power output circuit comprises an alternating output module and a switch tube module; the first end of the alternating output module is used for being connected with a second power supply, the second end of the alternating output module is connected with the first end of the switch tube module, the second end of the switch tube module is grounded, and the controlled end of the switch tube module is connected with the main control circuit;
the switching tube module is used for being switched on and switched off under the action of the pulse control signal, so that the second power supply forms alternating voltage on the alternating output module and then outputs the alternating voltage, and the voltage of the alternating voltage is positively correlated with the duty ratio of the pulse control signal.
6. The power supply circuit of claim 5, wherein the alternating output module comprises a voltage stabilization unit, a filtering unit, an alternating output unit, and a bleeding unit;
the first end of the alternating output unit is connected with the voltage stabilizing unit, and the second end of the alternating output unit is connected with the switching tube module;
the voltage stabilizing unit is used for being connected with the second power supply and conducting when the voltage input by the second power supply is greater than a preset voltage threshold;
the alternating output unit is used for converting the electric energy output by the voltage stabilizing unit into alternating voltage and outputting the alternating voltage;
the filtering unit is connected with the voltage stabilizing unit and is used for filtering the electric energy input by the second power supply;
the discharge unit is connected between the first end and the second end of the alternating output unit and used for absorbing discharge energy of the alternating output unit when the switch tube module is turned off.
7. The power supply circuit according to any one of claims 1 to 4, wherein the power supply circuit further comprises a voltage dividing circuit; the first end of the voltage division circuit is used for connecting a third power supply, the second end of the voltage division circuit is grounded, and the voltage division end of the voltage division circuit is connected with the main control circuit;
the voltage division circuit is used for receiving the electric energy of the third power supply, converting the electric energy of the third power supply into feedback voltage and outputting the feedback voltage to the main control circuit;
the main control circuit is further used for outputting a pulse control signal to the power output circuit according to the control voltage and the feedback voltage when the control voltage is greater than or equal to a preset reference voltage.
8. The power supply circuit according to claim 7, wherein the voltage divider circuit comprises a first resistor and a second resistor, one end of the first resistor is used for connecting the third power supply, and the other end of the first resistor is connected in series with the second resistor and grounded; the voltage division end is located between the first resistor and the second resistor.
9. An auxiliary power supply circuit, comprising the power supply circuit as claimed in claim 1 and at least one voltage conversion circuit, wherein the power supply circuit is electrically connected to the at least one voltage conversion circuit, and the at least one voltage conversion circuit is configured to convert and output an alternating voltage output by the power supply circuit.
10. An electronic device characterized by comprising the auxiliary source circuit as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221916845.1U CN218335404U (en) | 2022-07-20 | 2022-07-20 | Power supply circuit, auxiliary power supply circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221916845.1U CN218335404U (en) | 2022-07-20 | 2022-07-20 | Power supply circuit, auxiliary power supply circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218335404U true CN218335404U (en) | 2023-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221916845.1U Active CN218335404U (en) | 2022-07-20 | 2022-07-20 | Power supply circuit, auxiliary power supply circuit and electronic equipment |
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| Country | Link |
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| CN (1) | CN218335404U (en) |
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2022
- 2022-07-20 CN CN202221916845.1U patent/CN218335404U/en active Active
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Address after: 518000 Factory Building 401, Runheng Industrial Plant 1, Fuyuan Road, Zhancheng Community, Fuhai Street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Zhenghao Innovation Technology Co.,Ltd. Country or region after: China Address before: 518000, 1st Floor, Building E, Jiehe Industrial City, Shuitian Community, Shiyan Street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Zhenghao Innovation Technology Co.,Ltd. Country or region before: China |