CN218514137U - Auxiliary source circuit and electronic equipment - Google Patents

Abstract

The application provides an auxiliary source circuit, including a DC power supply circuit, an AC power supply circuit, a voltage feedback circuit, and a switch switching circuit; the DC power supply circuit is used to supply power to the target circuit according to the DC source; the AC power supply circuit is used to supply power to the target circuit according to the AC source Power supply; the voltage feedback circuit is used to output the first stop signal when the input voltage of the DC power supply circuit is greater than the preset voltage, so that the AC power supply circuit stops working; when the input voltage is lower than the preset voltage, output the enabling signal to make the AC power supply The circuit starts to work when there is an AC source input; when the switch switching circuit is in the first state, the control voltage feedback circuit converts the first stop signal into an enable signal output; in the second state, the control voltage feedback circuit maintains the first stop signal Or enable signal output. The application can start the AC power supply circuit when the DC power supply circuit is closed, so that the electronic equipment can be charged by the AC source when connected to the AC source.

Description

Auxiliary source circuit and electronic equipment

technical field

The present application relates to the field of power supply technology, and in particular to an auxiliary source circuit and electronic equipment.

Background technique

In the power supply circuit of electronic equipment, the auxiliary source circuit is used to provide the voltage required for the main circuit of the equipment to work at the initial stage of circuit startup, and stop power supply after the output of the main circuit of the equipment is stable. In traditional electronic equipment, the auxiliary source circuit may include a DC power supply circuit and an AC power supply circuit. When the DC power supply circuit has power supply, the DC power supply circuit is given priority to supply power, and the AC power supply circuit will be turned off. At this time, once the auxiliary source circuit is turned off and the main circuit is also turned off, the electronic device cannot be charged by the AC source when it is connected to the AC source, and the power of the electronic device cannot be replenished in time, which in turn leads to its inability to charge the electronic device. Meet the actual electricity demand of users.

Utility model content

The main purpose of this application is to provide an auxiliary source circuit and electronic equipment. When the DC power supply circuit in the auxiliary source circuit is turned off, the AC power supply circuit can be started at the same time, so that the auxiliary source circuit can use the AC source to control the electronic equipment when it is connected to the AC source. to charge.

In the first aspect, the present application provides an auxiliary source circuit, including a DC power supply circuit, an AC power supply circuit, a transformer circuit, a voltage feedback circuit, a switch switching circuit, and a voltage stabilizing output circuit;

The DC power supply circuit is used to connect with the DC source, and generates the first voltage on the transformer circuit according to the DC source; the AC power supply circuit is used to connect with the AC source, and generates the second voltage on the transformer circuit according to the AC source; the transformer The circuit is used to output a third voltage to the voltage-stabilizing output circuit according to the first voltage or the second voltage; the voltage-stabilizing output circuit is used to output a target voltage after stabilizing the third voltage to supply power to the target circuit;

The voltage feedback circuit is connected to the input terminal of the DC power supply circuit, and is used to output the first stop signal to the AC power supply circuit when the input voltage of the DC power supply circuit is greater than the preset voltage, and when the input voltage of the DC power supply circuit is lower than the preset voltage , outputting the enabling signal to the AC power supply circuit; the AC power supply circuit is also used to stop working when receiving the first stop signal, and start working when receiving the enabling signal and having an AC source input;

The switch switching circuit is respectively connected with the DC power supply circuit and the voltage feedback circuit; the switch switching circuit includes a first state and a second state; when the switch switching circuit is in the first state, the control voltage feedback circuit converts the first stop signal into an enable signal output To the AC power supply circuit; when the switch switching circuit is in the second state, the control voltage feedback circuit keeps the first stop signal or the enable signal output to the AC power supply circuit.

In an embodiment, the switch switching circuit is further configured to output a second stop signal to the DC power supply circuit in the first state; the DC power supply circuit is further configured to stop working when receiving the second stop signal.

In one embodiment, the first stop signal is a high-level signal, and the enable signal is a low-level signal;

The switch switching circuit includes a switch unit, a first connection unit and a second connection unit; the first terminal of the first connection unit is connected to the input terminal of the voltage feedback circuit, and the second terminal of the first connection unit is connected to the first lead of the switch unit. pin; the first end of the second connection unit is connected to the enable end of the DC power supply circuit, and the second end of the second connection unit is connected to the first pin of the switch unit; the second pin of the switch unit is grounded; in the first In the state, the first pin and the second pin of the switch unit are connected; in the second state, the first pin and the second pin of the switch unit are disconnected.

In one embodiment, the first connection unit includes a first anti-anti-subunit, the first end of the first anti-anti-subunit is connected to the input end of the voltage feedback circuit, and the second end of the first anti-anti-subunit is connected to the switch unit the first pin; the first anti-reversal sub-unit is used to prevent the current in the switch switching circuit from pouring back into the voltage feedback circuit;

The second connection unit includes a second anti-anti-anti-subunit, the first end of the second anti-anti-sub-unit is connected to the enabling end of the DC power supply circuit, and the second end of the second anti-anti-sub-unit is connected to the first lead of the switch unit. pin; the second anti-reversal sub-unit is used to prevent the current in the switch switching circuit from pouring back into the DC power supply circuit.

In an embodiment, the switch switching circuit further includes a state detection unit; the state detection unit is used to detect the level of the switch unit, and outputs a voltage detection signal; the voltage detection signal is used to indicate the state of the switch unit.

In one embodiment, the state detection unit includes a voltage dividing subunit, a current limiting subunit, and a switch subunit;

The input terminal of the current-limiting subunit is used to connect to the first power supply, the output terminal of the current-limiting subunit is connected to the first terminal of the switch subunit and used to output a voltage detection signal; the second terminal of the switch subunit is grounded; The control terminal is connected to the voltage dividing terminal of the voltage dividing subunit; the input terminal of the voltage dividing subunit is used to connect to the second power supply, and the output terminal of the voltage dividing subunit is grounded;

The voltage dividing subunit is used to control the switch subunit to turn off when the switch switching circuit is in the first state, and to control the switch subunit to turn on when the switch switching circuit is in the second state; when the switch subunit is turned off, the state detection The unit outputs a first voltage signal corresponding to the electric energy provided by the first power supply, and when the switch subunit is turned on, the state detection unit outputs a second voltage signal; the first voltage signal is greater than the second signal.

In one embodiment, the switch switching circuit further includes a third anti-reverse unit, a first voltage stabilizing unit, and a second voltage stabilizing unit;

The first end of the third anti-reverse unit is connected to the voltage divider end of the voltage divider subunit, and the second end of the third anti-reverse unit is connected to the first pin of the switch unit; the third anti-reverse unit is used to prevent the DC power supply circuit from The current in the current and the current in the voltage feedback circuit are poured back into the voltage dividing subunit;

The first end of the first voltage stabilizing unit is connected to the voltage dividing end of the voltage dividing subunit, and the second end of the first voltage stabilizing unit is grounded; the first voltage stabilizing unit is used to output the signal at the voltage dividing end of the voltage dividing subunit To stabilize the voltage;

The first terminal of the second voltage stabilizing unit is connected to the output terminal of the current limiting subunit, and the second terminal of the second voltage stabilizing unit is grounded; the second voltage stabilizing unit is used for stabilizing the voltage detection signal.

In one embodiment, the switching circuit further includes an electrostatic protection unit; the first end of the electrostatic protection unit is connected to the first pin of the switch unit, and the second end of the electrostatic protection unit is grounded.

In an embodiment, the DC power supply circuit includes a starting unit, a first main control unit, and a first power output unit; the first main control unit is configured to output a first reference signal to the starting unit when receiving a first power supply signal, so that The starting unit generates a corresponding control voltage according to the first reference signal, and outputs it to the first main control unit; when the control voltage is greater than the preset reference voltage, the first main control unit outputs a pulse control signal to the first power output unit according to the control voltage ; The first power output unit is used to convert the electric energy input by the DC source into a second voltage according to the pulse control signal.

In a second aspect, the present application provides an electronic device, including the auxiliary source circuit provided in the foregoing embodiment.

The auxiliary source circuit provided by this application includes a DC power supply circuit, an AC power supply circuit, a transformer circuit, a voltage feedback circuit, a switch switching circuit, and a voltage-stabilizing output circuit; the DC power supply circuit is used to The first voltage is generated on the transformer circuit; the AC power supply circuit is used to connect with the AC source, and generates the second voltage on the transformer circuit according to the AC source; the transformer circuit is used to output the third voltage according to the first voltage or the second voltage to A voltage-stabilizing output circuit; the voltage-stabilizing output circuit is used to stabilize the third voltage and then output the target voltage to supply power to the target circuit; the voltage feedback circuit is connected to the input terminal of the DC power supply circuit, and is used for when the input voltage of the DC power supply circuit is greater than the preset When the voltage is set, the first stop signal is output to the AC power supply circuit, and when the input voltage of the DC power supply circuit is less than the preset voltage, the enable signal is output to the AC power supply circuit; the AC power supply circuit is also used to receive the first stop signal Stop working when the enable signal is received and there is an AC source input; the switching circuit is connected to the DC power supply circuit and the voltage feedback circuit respectively; the switching circuit includes a first state and a second state; the switching circuit is in the In the first state, the control voltage feedback circuit converts the first stop signal into an enable signal and outputs it to the AC power supply circuit; when the switch switching circuit is in the second state, the control voltage feedback circuit maintains the first stop signal or the enable signal and outputs it to the AC power supply circuit. power supply circuit. This application uses the switch switching circuit to control the voltage feedback circuit to convert the first stop signal into an enabling signal and output it to the AC power supply circuit when the switch switching circuit is in the first state, and when the switch switching circuit is in the second state, the control voltage feedback circuit maintains the first stop signal The signal or enable signal is output to the AC power supply circuit. When there is a DC source to supply power to the DC power supply circuit, the voltage feedback circuit can receive the power supply from the DC source, so as to output the first stop signal to the AC power supply circuit, so that the AC power supply circuit is in a closed state, and even if there is an AC source input AC The power supply circuit also cannot start working. At this time, by controlling the switch switching circuit to be in the first state, the voltage feedback circuit can be controlled to convert the first stop signal into an enable signal and output it to the AC power supply circuit, and then the AC power supply circuit can be started to use when there is an AC source input. The AC source is used to provide power, thereby avoiding the problem that the electronic device cannot be charged by the AC source when the AC source is connected, and ensuring that the power of the electronic device can be replenished in time to meet the needs of users.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. Ordinary technicians can also obtain other drawings based on these drawings on the premise of not paying creative work.

FIG. 1 is a schematic block diagram of an auxiliary source circuit provided by an embodiment of the present application;

FIG. 2 is a schematic block diagram of a switch switching circuit in an auxiliary source circuit provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a switch switching circuit provided by an embodiment of the present application;

FIG. 4 is a schematic block diagram of another switch switching circuit provided by an embodiment of the present application;

FIG. 5 is a schematic block diagram of another switch switching circuit provided by an embodiment of the present application;

FIG. 6 is a schematic block diagram of another switch switching circuit provided by an embodiment of the present application;

FIG. 7 is a schematic block diagram of a DC power supply circuit provided by an embodiment of the present application;

FIG. 8 is a schematic block diagram of an AC power supply circuit provided by an embodiment of the present application;

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

Some implementations of the present application will be described in detail below in conjunction with the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

The auxiliary source circuit is provided with a DC power supply circuit, an AC power supply circuit, a voltage transformation circuit and a voltage stabilizing output circuit. The DC power supply circuit is used to generate a first voltage on the transformer circuit by using a DC source. The AC power supply circuit is used to generate a second voltage on the transformer circuit by using an AC source. The voltage transforming circuit is used to output the third voltage to the voltage stabilizing output circuit according to the first voltage or the second voltage, so that the voltage stabilizing output circuit stabilizes the third voltage and outputs a target voltage to supply power to the target circuit. In the traditional circuit, when there is a DC source to supply power to the DC power supply circuit, the voltage feedback circuit can receive the power supply from the DC source, so as to output the first stop signal to the AC power supply circuit, so that the AC power supply circuit is in a closed state, and even Even if there is an AC source input to the AC power supply circuit, it cannot start to work.

Please refer to FIG. 1 , which is a schematic block diagram of an auxiliary source circuit provided by an embodiment of the present application. As shown in FIG. 1 , the auxiliary source circuit includes a DC power supply circuit 10 , an AC power supply circuit 20 , a voltage transformation circuit 30 , a voltage feedback circuit 40 , a switch switching circuit 50 and a voltage stabilizing output circuit 60 . Wherein, the DC power supply circuit 10 is used to connect with the DC source Vdc-in, and can generate the first voltage on the transformer circuit 30 according to the DC source Vdc-in. The AC power supply circuit 20 is used to connect with the AC source Vac-in, and generate a second voltage on the transformer circuit 30 according to the AC source Vac-in. The voltage transforming circuit 30 is used to output the third voltage to the voltage stabilizing output circuit 60 according to the first voltage or the second voltage, so that the voltage stabilizing output circuit 60 stabilizes the third voltage and outputs the target voltage to supply power to the target circuit, thereby realizing The purpose of supplying power to the target circuit through the DC power supply circuit 10 or the AC power supply circuit 20 .

In a specific implementation process, the DC power supply circuit 10 is connected to the DC source Vdc-in through the DC interface, and the AC power supply circuit 20 is connected to the AC source Vac-in through the AC interface. The DC source Vdc-in can be a rechargeable battery, a solar system, or a DC generator, etc.; the AC source Vac-in can be commercial power, or other power supply devices capable of outputting AC power. In this application, the AC source Vac-in is described by taking commercial power as an example.

The voltage feedback circuit 40 is connected to the input terminal of the DC power supply circuit 10 , and is used for outputting a first stop signal to the AC power supply circuit 20 when the input voltage of the DC power supply circuit 10 is greater than or equal to a preset voltage. When the input voltage of the DC power supply circuit 10 is lower than the preset voltage, an enabling signal is output to the AC power supply circuit 20 . Therefore, the working state of the AC power supply circuit 20 can be controlled by the input voltage of the DC power supply circuit 10 . Specifically, the AC power supply circuit 20 is configured to stop working when receiving the first stop signal, and start working when receiving the enable signal and the AC source Vac-in is input.

Exemplarily, when the input voltage of the DC power supply circuit 10 is greater than or equal to the preset voltage, the target circuit can be powered through the DC power supply circuit 10, and the AC power supply circuit 20 is not needed for power supply at this time, so the voltage feedback circuit 40 can be used to output the first A stop signal is sent to the AC power supply circuit 20, so that the AC power supply circuit 20 stops working. When the input voltage of the DC power supply circuit 10 is less than the preset voltage, it is determined that the DC power supply circuit 10 does not supply power to the target circuit, or the power supply of the DC power supply circuit 10 does not meet the requirements. At this time, it is necessary to start the AC power supply circuit 20. The circuit is powered, so the enable signal is output to the AC power supply circuit 20 through the voltage feedback circuit 40, so that the AC power supply circuit 20 starts to work, and the target circuit is powered based on the AC source Vac-in connected to the AC power supply circuit 20 .

Wherein, the switch switching circuit 50 is connected to the DC power supply circuit 10 and the voltage feedback circuit 40 respectively.

The switch switching circuit 50 includes a first state and a second state. When the switch switching circuit 50 is in the first state, the control voltage feedback circuit 40 converts the first stop signal into an enable signal and outputs it to the AC power supply circuit 20 . When the switch switching circuit 50 is in the second state, the control voltage feedback circuit 40 keeps the first stop signal or the enable signal output to the AC power supply circuit 20 . In this way, the working state of the AC power supply circuit 20 can be controlled by the switch switching circuit 50 .

Exemplarily, the user can select the DC power supply circuit 10 to supply power to the target circuit or the AC power supply circuit 20 to supply power to the target circuit through the switch switching circuit 50, so that the electronic device can be connected to the mains, and needs to use the mains When charging, start the AC power supply circuit 20 in the electronic device, so that the commercial power supplies power to the transformer circuit 30 through the AC power supply circuit 20, and then the corresponding voltage is induced by the transformer circuit 30, and then the voltage stabilization output circuit 60 outputs the target voltage to power the target circuit. The target circuit may be a main working circuit in an electronic device, such as an inverter circuit, an MPPT circuit, a DC/DC circuit, and the like.

In a specific implementation process, when the switch switching circuit 50 is in the second state, if the input voltage of the DC power supply circuit 10 is greater than the preset voltage, the voltage feedback circuit 40 outputs a first stop signal to the AC power supply circuit 20, so that the AC power supply circuit 20 stop working. At this time, if the user wants to supply power to the transformer circuit 30 in the electronic device through the AC source Vac-in, such as commercial power, the switch circuit can be adjusted from the second state to the first state, so that the switch circuit can control the voltage feedback circuit 40 to The first stop signal is converted into an enable signal and output to the AC power supply circuit 20 , so that the AC power supply circuit 20 can start and supply power to the transformer circuit 30 .

In some embodiments, the switching circuit 50 is further configured to output a second stop signal to the DC power supply circuit 10 in the first state, and the DC power supply circuit 10 is further configured to stop working when receiving the second stop signal.

Exemplarily, when the switch switching circuit 50 is in the first state, the AC power supply circuit 20 is started to supply power to the transformer circuit 30. At this time, the switch switching circuit 50 outputs a second stop signal to the DC power supply circuit 10, so that the DC power supply circuit 10 stops work, so that when the DC power supply circuit 10 is turned off, the AC power supply circuit 20 can be ensured to start, so as to allow the AC source Vac-in to charge the electronic equipment.

In some embodiments, the first stop signal is a high-level signal, and the enable signal is a low-level signal. That is, the AC power supply circuit 20 stops working when receiving the high-level signal output from the voltage feedback circuit 40 , and starts up when receiving the low-level signal output from the voltage feedback circuit 40 .

Please refer to FIG. 2 . FIG. 2 is a schematic block diagram of a switching circuit 50 in an auxiliary source circuit provided by an embodiment of the present application. Wherein, the switch switching circuit 50 includes a switch unit 51 , a first connection unit 52 and a second connection unit 53 . A first terminal of the first connection unit 52 is connected to the input terminal of the voltage feedback circuit 40 , and a second terminal of the first connection unit 52 is connected to the first pin of the switch unit 51 . The first terminal of the second connection unit 53 is connected to the enabling terminal of the DC power supply circuit 10 , the second terminal of the second connection unit 53 is connected to the first pin of the switch unit 51 , and the second pin of the switch unit 51 is grounded.

Exemplarily, the input terminal of the voltage feedback circuit 40 includes a first input terminal and a second input terminal, wherein a voltage dividing resistor is connected between the first input terminal and the second input terminal, and the first terminal of the first connection unit 52 It can be connected to the first input terminal of the voltage feedback circuit 40 , and the second input terminal of the voltage feedback circuit 40 can be connected to the enabling terminal of the DC power supply circuit 10 . The first terminal of the first connection unit 52 can also be connected to the second input terminal of the voltage feedback circuit 40 , and the first input terminal of the voltage feedback circuit 40 can be connected to the enabling terminal of the DC power supply circuit 10 .

When the switch switching circuit 50 is in the second state, the first pin and the second pin of the switch unit 51 are disconnected. Therefore, the first terminal of the first connection unit 52 and the second terminal of the second connection unit 53 One end will maintain the level state of their respective connection points, that is, when the input voltage of the DC power supply circuit 10 is greater than or equal to the preset voltage, the first end of the first connection unit 52 is in a high level state at this time. , the voltage feedback circuit 40 outputs a first stop signal to the AC power supply circuit 20 . It can be understood that since the first stop signal is a high-level signal, the AC power supply circuit 20 stops working due to receiving the first stop signal. In this state, the first terminal of the first connection unit 52 is in a high level state, and the enable terminal of the DC power supply circuit 10 will output a high level to start working and supply power to the target circuit.

At this time, if the system or the user sends an instruction to control the DC power supply circuit 10 to stop power supply, since the input terminal of the DC power supply circuit 10 is still connected to the DC source Vdc-in, the voltage feedback circuit 40 can still detect the DC source Vdc -in, so as to continue to output the first stop signal to the AC power supply circuit 20, so that the AC power supply circuit 20 stops working. Therefore, if the switch switching circuit 50 is not provided, even if the AC power supply circuit 20 has an AC source Vac-in input, and the DC power supply circuit 10 does not work, the AC power supply circuit 20 will also stop due to the first output of the voltage feedback circuit 40. signal and remain stopped. As a result, the electronic equipment cannot use the AC source to supply power to the target circuit, for example, the battery module cannot be charged by the mains power, resulting in the inability to meet the power consumption demand of the electric equipment. However, in this embodiment, when it is necessary to turn off the DC power supply circuit 10 for power supply, the switch switching circuit 50 can be adjusted to the first state, that is, the switch unit 51 is controlled to be turned on. The high level of the input terminal is pulled low, so that the voltage feedback circuit 40 switches from outputting the first stop signal to outputting the enable signal. At this time, even if the DC source Vdc-in exists, the AC power supply circuit 20 can start to supply power when the AC source Vac-in is input. Therefore, in this embodiment, by adjusting the connection state between the first pin and the second pin of the switch unit 51, the DC power supply circuit 10 can be turned off and the DC power supply circuit 20 can be activated to utilize the AC power supply while stopping the charging of the DC source Vdc-in. The source Vac-in powers the electronics.

When the switch switching circuit 50 is in the first state, the first pin and the second pin of the switch unit 51 are connected. Therefore, the first terminal output of the first connection unit 52 and the second terminal of the second connection unit 53 Both ends output low-level signals, that is, the first end of the first connection unit 52 outputs a second stop signal to the DC power supply circuit 10 . The DC power supply circuit 10 will be turned off when receiving the second stop signal, and at the same time, the voltage feedback circuit 40 will convert the first stop signal into an enable signal and output it to the AC power supply circuit 20 when receiving the low-level signal, so that the AC power supply circuit The power supply circuit 20 is turned on, so that when the DC power supply circuit 10 is turned off, the AC power supply circuit 20 is started, so that the AC source Vac-in can supply power to the transformer circuit 30 through the AC power supply circuit 20, and then the transformer circuit 30 induces a corresponding After that, the stabilized voltage output circuit 60 outputs the target voltage to supply power to the target circuit, which avoids the situation that the electronic equipment cannot be charged by the commercial power when it is connected to the commercial power.

It should be noted that, when the switching circuit 50 changes from the first state to the second state, both the first pin and the second pin of the switch unit 51 are disconnected from the ground. At this time, the levels of the input terminal of the voltage feedback circuit 40 and the enabling terminal of the DC power supply circuit 10 are determined by the actual levels provided by the circuit. For example, if there is a DC source Vdc-in to supply power at this time, the enabling terminal of the DC power supply circuit 10 will maintain a high level, and the input terminal of the voltage feedback circuit 40 will also be a first stop signal of a high level. The circuit 10 supplies power while the AC power supply circuit 20 stops supplying power. If there is no DC source Vdc-in power supply at this time, the enabling terminal of the DC power supply circuit 10 is low level, and the power supply is stopped; at the same time, the input terminal of the voltage feedback circuit 40 is a low level enabling signal. The AC source Vac-in means that the AC power supply circuit 20 uses the AC source Vac-in to supply power.

Please refer to FIG. 3 . FIG. 3 is a schematic diagram of a switching circuit 50 provided by an embodiment of the present application. The first connection unit 52 includes a first anti-anti-subunit, the first end of the first anti-anti-subunit is connected to the input end of the voltage feedback circuit 40, and the second end of the first anti-anti-subunit is connected to the first end of the switch unit 51. a pin. The first anti-reversal sub-unit is used to prevent the current in the switching circuit 50 from flowing backward to the voltage feedback circuit 40 .

It can be understood that since the second end of the first connection unit 52 is also connected to other subunits, there may be a current backflow situation. By setting the first anti-reversal subunit in the first connection unit 52, the current backflow to the The voltage feedback circuit 40 prevents the voltage feedback circuit 40 from outputting wrong signals to the AC power supply circuit 20 due to current backflow.

The second connection unit 53 includes a second anti-anti-subunit, the first end of the second anti-anti-subunit is connected to the enable end of the DC power supply circuit 10, and the second end of the second anti-anti-subunit is connected to the switch unit 51. first pin. The second anti-reversal sub-unit is used to prevent the current in the switch switching circuit 50 from flowing backward to the DC power supply circuit 10 .

Similarly, since the second end of the second connection unit 53 is also connected to other subunits, there will also be current backflow. By setting the second anti-reversal subunit in the second connection unit 53, the current backflow to the DC power supply can be prevented. circuit 10, thereby avoiding false start of the DC power supply circuit 10.

In some embodiments, please continue to refer to FIG. 3 , the first anti-reverse subunit includes a first diode D1, the anode of the first diode D1 is connected to the input end of the voltage feedback circuit 40, and the first diode D1 The cathode of is connected to the first pin of the switch unit 51 . The second anti-reflection sub-unit includes a second diode D2 , the anode of the second diode D2 is connected to the DC power supply circuit 10 , and the cathode of the second diode D2 is connected to the first pin of the switch unit 51 .

It should be noted that the diode provided above is an embodiment of the anti-reversal sub-unit, and other components with anti-reversal functions can also be used as the above-mentioned anti-reversal sub-unit, which is not limited in this application.

Please refer to FIG. 4 . FIG. 4 is a schematic block diagram of another switching circuit 50 provided by an embodiment of the present application. As shown in FIG. 4 , the switch switching circuit 50 further includes a state detection unit 54 . The state detection unit 54 is used to detect the level of the switch unit 51 in the switch switching circuit 50 and output a voltage detection signal SW_DEC. Wherein, the voltage detection signal SW_DEC is used to indicate the state of the switch unit 51 .

Exemplarily, when the first pin and the second pin of the switch unit 51 are connected, a high-level voltage detection signal SW_DEC may be output; between the first pin and the second pin of the switch unit 51 When it is in an off state, a low-level voltage detection signal SW_DEC can be output.

Exemplarily, the state detection unit 54 may output a voltage detection signal SW_DEC through a voltage detection terminal.

Exemplarily, through the voltage detection signal SW_DEC output by the state detection unit 54, other circuits in the electronic device, such as the main control circuit, can know the current power supply state of the auxiliary source circuit, for example, it is powered by the DC power supply circuit 10 or It is powered by the AC power supply circuit 20 .

It can be understood that when different power supply circuits supply power, the voltage detection signal SW_DEC output by the state detection unit 54 is also different. For example, when the DC power supply circuit 10 is supplying power, the output voltage detection signal SW_DEC may be a low-level signal, and when the AC power supply circuit 20 is supplying power, the output voltage detection signal SW_DEC may be a high-level signal. This enables the main control circuit in the electronic device to know the current power supply status of the auxiliary source circuit through the voltage detection signal SW_DEC output by the status detection unit 54 .

Please refer to FIG. 5 . FIG. 5 is a schematic block diagram of another switching circuit 50 provided by an embodiment of the present application. In some embodiments, the state detection unit 54 includes a voltage dividing subunit 541 , a current limiting subunit 542 and a switch subunit 543 . The input terminal of the current limiting subunit 542 is used to connect to the first power supply VCC1, and the output terminal of the current limiting subunit 542 is connected to the first terminal of the switch subunit 543, and is also used to output the voltage detection signal SW_DEC. The second terminal of the switch subunit 543 is grounded, and the control terminal of the switch subunit 543 is connected to the voltage divider terminal of the voltage divider subunit 541 . The input terminal of the voltage dividing subunit 541 is used to connect to the second power supply VCC2, and the output terminal of the voltage dividing subunit 541 is grounded.

Wherein, the voltage dividing subunit 541 is used to output a low level signal at the voltage dividing terminal when the switch switching circuit 50 is in the first state, that is, when the first pin and the second pin of the switch unit 51 are in a connection state , to control the switch subunit 543 to turn off. At this moment, since the switch subunit 543 is turned off, the electric energy input by the first power supply VCC1 passes through the current limiting of the current limiting subunit 542 , and then outputs a corresponding first voltage signal at the output terminal of the current limiting subunit 542 . For example, if the first power supply VCC1 is a 3.3V voltage source, when the switch subunit 543 is turned off, the output terminal of the current limiting subunit 542 will output a first voltage signal of 3.3V.

The voltage divider subunit 541 is also used to provide the second power supply with the voltage divider subunit 541 when the switch switching circuit 50 is in the first state, that is, when the first pin and the second pin of the switch unit 51 are in a disconnected state. After the voltage input by VCC2 is divided, a corresponding divided signal is output to the switch subunit 543 to control the switch subunit 543 to conduct. At this time, since the switch subunit 543 is turned on, the electric energy input by the first power supply VCC1 will be discharged through the switch subunit 543 , so that the output terminal of the current limiting subunit 542 will output a second voltage signal close to 0V. Therefore, the main control circuit can receive the first voltage signal, such as a voltage detection signal of 3.3V. Or receive a second voltage signal, such as a voltage detection signal close to 0V, to determine the state of the switch unit 51 of the switch switching circuit 50 .

Exemplarily, please continue to refer to FIG. 3 , the current limiting subunit 542 may include a first resistor R1, and the switching subunit 543 may include a MOS transistor Q1. The first end of the first resistor R1 is used to connect to the first power supply VCC1, and the second end of the first resistor R1 is used to connect to the first end of the MOS transistor Q1. The second end of the MOS transistor Q1 is grounded, and the controlled end of the MOS transistor Q1 is connected to the voltage dividing end of the voltage dividing subunit 541 . The voltage dividing subunit 541 may include a second resistor R2 and a third resistor R3, wherein, the first end of the second resistor R2 is used to connect to the second power supply VCC2, and the second end of the second resistor R2 is used as the voltage dividing subunit 541. The voltage dividing terminal and the second terminal of the second resistor R2 are also grounded through the third resistor R3.

It should be noted that the first resistor R1 , the second resistor R2 , the third resistor R3 and the MOS transistor Q1 above are all illustrative examples, and do not limit the specific configuration of the subunits capable of realizing corresponding functions in this application.

Please refer to FIG. 6 . FIG. 6 is a schematic block diagram of another switching circuit 50 provided by an embodiment of the present application. In some embodiments, the switch switching circuit 50 further includes a third anti-reverse unit 55, the first end of the third anti-reverse unit 55 is connected to the voltage dividing end of the voltage dividing subunit 541, and the second end of the third anti-reverse unit 55 The terminal is connected to the first pin of the switch unit 51. The third anti-reverse unit 55 is used to prevent the current in the DC power supply circuit 10 and the current in the voltage feedback circuit 40 from flowing backward to the voltage dividing sub-unit 541 .

Exemplarily, an anti-reverse unit is provided between the voltage dividing subunit 541 and the first connection unit 52 and the second connection unit 53, which can prevent the voltage feedback circuit 40 connected to the first connection unit 52 and the second connection unit 53 from The current in the connected DC power supply circuit 10 is poured back into the voltage divider subunit 541, so as to cause the voltage divider subunit 541 to output an erroneous voltage divider signal, and at the same time enable the voltage divider subunit 541 to be in the first position of the switch unit 51. When the pin and the second pin are in a connected state, the current is discharged.

In some embodiments, please continue to refer to FIG. 3 , the third anti-reverse unit 55 includes a third diode D3, the anode of the third diode D3 is connected to the voltage dividing terminal of the voltage dividing subunit 541, and the third diode The cathode of D3 is connected to the first pin of the switch unit 51 .

Please continue to refer to FIG. 6, the switch switching circuit 50 also includes a first voltage stabilizing unit 56 and a second voltage stabilizing unit 57; the first end of the first voltage stabilizing unit 56 is connected to the voltage dividing end of the voltage dividing subunit 541, and the first The second terminal of the voltage stabilizing unit 56 is grounded. The first voltage stabilizing unit 56 is used for stabilizing the signal output from the voltage dividing end of the voltage dividing subunit 541 . The first terminal of the second voltage stabilizing unit 57 is connected to the output terminal of the current limiting sub-unit 542, and the second terminal of the second voltage stabilizing unit 57 is grounded; the second voltage stabilizing unit 57 is used for stabilizing the voltage detection signal.

The first voltage stabilizing unit 56 stabilizes the voltage division signal, and the second voltage stabilizing unit 57 stabilizes the voltage detection signal, which can improve the stability of the switching circuit 50 .

Please continue to refer to FIG. 3. In some implementations, the first voltage stabilizing unit 56 includes a first capacitor C1, and the second voltage stabilizing unit 57 includes a second capacitor C2. It can be understood that the first capacitor C1 is used to divide the voltage signal To stabilize the voltage, the second capacitor C2 is used to stabilize the voltage detection signal SW_DEC, thereby improving the stability of the switching circuit 50 .

Please continue with Figure 3. In some embodiments, the switching circuit 50 further includes an electrostatic protection unit D4. The first end of the ESD protection unit D4 is connected to the first pin of the switch unit 51 , and the second end of the ESD protection unit D4 is grounded. It can be understood that the static electricity protection unit D4 is used to prevent the static electricity generated by the switching circuit 50 from damaging or falsely starting components in the switching circuit 50 , thereby improving the service life and stability of the switching circuit 50 .

Please refer to FIG. 7 , which is a schematic block diagram of a DC power supply circuit 10 provided by an embodiment of the present application.

In some embodiments, the DC power supply circuit 10 includes a startup unit 12 , a first main control unit 11 and a first power output unit 13 . The first main control unit 11 is configured to output the first reference signal to the startup unit 12 through the reference signal output terminal VREF when receiving the first power supply signal VVC1, so that the startup unit 12 generates a corresponding control voltage according to the first reference signal and outputs it to The output control terminal COMPN of the first main control unit 11 . The first main control unit 11 is further configured to output a pulse control signal to the first power output unit 13 at the output terminal OUT according to the control voltage when the control voltage is greater than the preset reference voltage. The first power output unit 13 is used for converting the electric energy input by the DC source Vdc-in into a second voltage output on the transformer circuit 30 according to the pulse control signal. In this way, the target circuit can be powered by the DC source Vdc-in and the DC power supply circuit 10 .

It can be understood that when the switching circuit 50 is in the second state, the working states of the units in the DC power supply circuit 10 can be as described above.

Wherein, when the switching circuit 50 is in the first state, the second stop signal is output to the starting unit 12 , so that the starting unit 12 discharges the electric energy on the starting unit 12 through the switching circuit 50 . Therefore, the electric energy received by the starting unit 12 is discharged through the switch switching circuit 50, so that the control voltage cannot be output to the first main control unit 11, so that the control voltage on the output control terminal COMPN of the first main control unit 11 If the voltage is lower than the preset reference voltage, the first main control unit 11 stops outputting the pulse control signal, that is, the DC power supply circuit 10 will not supply power.

Please refer to FIG. 8 . FIG. 8 is a schematic structural block diagram of an AC power supply circuit 20 provided by an embodiment of the present application.

The AC power supply circuit 20 includes a discharge unit 22 , a voltage stabilizing unit 23 , a second main control unit 21 and a second power output unit 24 . The second main control unit 21 is configured to output the second reference signal to the output control terminal COMPN of the second main control unit 21 through the reference signal output terminal VREF of the second main control unit 21 when receiving the second power supply signal VCC2 . The voltage stabilizing unit 23 is connected between the reference signal output terminal VREF and the output control terminal COMPN for stabilizing the voltage output to the output control terminal COMPN. The discharge unit 22 is connected between the voltage stabilizing unit 23 and the reference signal output terminal VREF. The voltage feedback circuit 40 is connected between the voltage stabilizing unit 23 and the output control terminal COMPN. The second main control unit 21 is also configured to output a driving signal to the second power output unit 24 according to the second reference signal. The second power output unit 24 is used for converting the electric energy output and input by the AC source into the first voltage on the transformer circuit 30 according to the driving signal. In this way, the target circuit is powered by the AC source and the AC power supply circuit 20 .

Wherein, when the switch switching circuit 50 is in the first state, the voltage feedback circuit 40 outputs an enable signal to control the discharge unit 22 to turn off, so that the reference signal output terminal VREF of the second main control unit 21 can output the second reference signal to Output control terminal COMPN. Thus, the second main control unit 21 can output the driving signal, and generate the first voltage on the transformer circuit 30 through the second power output unit 24 .

When the switching circuit 50 is in the second state and the voltage input by the DC power supply circuit 10 is greater than the preset voltage, the voltage feedback circuit 40 outputs a first stop signal to control the discharge unit 22 to be turned on. Therefore, the discharge unit 22 can discharge the electric energy on the voltage stabilizing unit 23 , so that the reference signal output terminal VREF of the second main control unit 21 cannot output the second reference signal to the output control terminal COMPN. Therefore, the second main control unit 21 will neither generate a driving signal nor generate the first voltage on the transformer circuit 30 , so as to achieve the purpose of shutting down the AC power supply circuit 20 .

The auxiliary source circuit of the present application is provided with the DC power supply circuit 10, the AC power supply circuit 20, the transformer circuit 30, the voltage feedback circuit 40, the switch switching circuit 50 and the voltage stabilizing output circuit 60, and by controlling the switch switching circuit 50 to be in the first state, then the voltage feedback circuit 40 can be controlled to convert the first stop signal into an enable signal and output it to the AC power supply circuit 20, then the AC power supply circuit 20 can be started to use the AC source for power supply when there is an AC source input, thereby avoiding The problem that the AC source cannot be used to charge the electronic device when the AC source is connected can ensure that the power of the electronic device can be replenished in time to meet the user's needs.

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 an energy storage device, a mobile power source, and the like.

Exemplarily, for a specific setting manner of an electronic device, reference may be made to the corresponding embodiments described in the specification of this application, and details will not be repeated here in this embodiment.

The electronic equipment provided by this application can control the switch switching circuit through the setting of the DC power supply circuit 10, the AC power supply circuit 20, the transformer circuit 30, the voltage feedback circuit 40, the switch switching circuit 50, and the voltage stabilizing output circuit 60 in the auxiliary source circuit. 50 is in the first state, then the voltage feedback circuit 40 can be controlled to convert the first stop signal into an enable signal and output it to the AC power supply circuit 20, then the AC power supply circuit 20 can be started to use the AC source for power supply when there is an AC source input , so as to avoid the problem that the electronic device cannot be charged by the AC source when the AC source is connected, and ensure that the power of the electronic device can be replenished in time to meet the needs of users.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. connected, or integrally connected. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two elements or the interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In this application, unless otherwise expressly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

The above disclosure provides many different implementations or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and arrangements of specific examples are described above. Of course, they are examples only and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or reference letters in various instances, such repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art may recognize the use of other processes and/or the use of other materials.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" etc. mean that the embodiments are combined Specific features, structures, materials, or characteristics described in or examples are 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 described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above-mentioned implementation mode is only the preferred implementation mode of the present application, which cannot limit the protection scope of the present application. Scope of protection claimed.

Claims (10)

1. An auxiliary source circuit is characterized by comprising a direct current power supply circuit, an alternating current power supply circuit, a voltage transformation circuit, a voltage feedback circuit, a switch switching circuit and a voltage stabilization output circuit;

the direct current power supply circuit is used for being connected with a direct current source and generating a first voltage on the voltage transformation circuit according to the direct current source; the alternating current power supply circuit is used for being connected with an alternating current source and generating a second voltage on the voltage transformation circuit according to the alternating current source; the voltage transformation circuit is used for outputting a third voltage to the voltage stabilization output circuit according to the first voltage or the second voltage; the voltage stabilizing output circuit is used for stabilizing the third voltage and then outputting a target voltage to supply power to a target circuit;

the voltage feedback circuit is connected with the input end of the direct current power supply circuit and is used for outputting a first stop signal to the alternating current power supply circuit when the input voltage of the direct current power supply circuit is greater than or equal to a preset voltage and outputting an enable signal to the alternating current power supply circuit when the input voltage of the direct current power supply circuit is less than the preset voltage; the alternating current power supply circuit is also used for stopping working when the first stop signal is received, and starting working when the enabling signal is received and an alternating current source is input;

the switch switching circuit is respectively connected with the direct current power supply circuit and the voltage feedback circuit; the switch switching circuit comprises a first state and a second state; when the switch switching circuit is in a first state, the voltage feedback circuit is controlled to convert the first stop signal into an enable signal and output the enable signal to the alternating current power supply circuit; and when the switch switching circuit is in a second state, the voltage feedback circuit is controlled to keep the first stop signal or the enable signal output to the alternating current power supply circuit.

2. The auxiliary power supply circuit according to claim 1, wherein the switch switching circuit is further configured to output a second stop signal to the dc power supply circuit in the first state; and the direct current power supply circuit is also used for stopping working when receiving the second stop signal.

3. The auxiliary source circuit according to claim 2, wherein the first stop signal is a high level signal, and the enable signal is a low level signal;

the switch switching circuit comprises a switch unit, a first connecting unit and a second connecting unit; a first end of the first connection unit is connected to an input end of the voltage feedback circuit, and a second end of the first connection unit is connected to a first pin of the switch unit; a first end of the second connection unit is connected to an enable end of the direct current supply circuit, and a second end of the second connection unit is connected to a first pin of the switch unit; a second pin of the switch unit is grounded; when the switch unit is in a first state, the first pin and the second pin of the switch unit are in a connection state; and in a second state, the first pin and the second pin of the switch unit are in an off state.

4. The auxiliary source circuit according to claim 3, wherein the first connection unit comprises a first anti-reflection subunit, a first end of the first anti-reflection subunit is connected to the input end of the voltage feedback circuit, and a second end of the first anti-reflection subunit is connected to the first pin of the switch unit; the first anti-reverse subunit is used for preventing the current in the switch switching circuit from flowing backwards to the voltage feedback circuit;

the second connection unit comprises a second anti-reverse subunit, a first end of the second anti-reverse subunit is connected to an enabling end of the direct current supply circuit, and a second end of the second anti-reverse subunit is connected to the first pin of the switch unit; the second anti-reverse subunit is used for preventing the current in the switch switching circuit from flowing backwards to the direct current power supply circuit.

5. The auxiliary source circuit according to any one of claim 3, wherein the switching circuit further comprises a state detection unit; the state detection unit is used for detecting the level of a first pin of a switch unit in the switch switching circuit and outputting a voltage detection signal; the voltage detection signal is used for indicating the state of the switch unit.

6. The auxiliary source circuit according to claim 5, wherein the state detection unit comprises a voltage division subunit, a current limiting subunit and a switch subunit;

the input end of the current limiting subunit is used for connecting a first power supply, and the output end of the current limiting subunit is connected with the first end of the switch subunit; the output end of the current limiting subunit is also used as the output end of the state detection unit; the second end of the switch subunit is grounded; the control end of the switch subunit is connected with the voltage dividing end of the voltage dividing subunit; the input end of the voltage dividing subunit is used for connecting a second power supply, and the output end of the voltage dividing subunit is grounded;

the voltage division subunit is used for controlling the switch subunit to be switched off when the switch switching circuit is in a first state, and controlling the switch subunit to be switched on when the switch switching circuit is in a second state; when the switch subunit is switched off, the state detection unit outputs a first voltage signal, and when the switch subunit is switched on, the state detection unit outputs a second voltage signal.

7. The auxiliary source circuit according to claim 6, wherein the switch switching circuit further comprises a third prevention unit, a first voltage stabilization unit, and a second voltage stabilization unit;

the first end of the third anti-reflection unit is connected to the voltage dividing end of the voltage dividing subunit, and the second end of the third anti-reflection unit is connected to the first pin of the switch unit; the third anti-reflection unit is used for preventing the current in the direct current power supply circuit and the current in the voltage feedback circuit from flowing backwards to the voltage divider subunit;

the first end of the first voltage stabilizing unit is connected with the voltage dividing end of the voltage dividing subunit, and the second end of the first voltage stabilizing unit is grounded; the voltage stabilizing unit is used for stabilizing the voltage of the signal output by the voltage dividing end of the voltage dividing subunit;

the first end of the second voltage stabilizing unit is connected with the output end of the current limiting subunit, and the second end of the second voltage stabilizing unit is grounded; the second voltage stabilization unit is used for stabilizing the voltage detection signal.

8. The auxiliary source circuit according to claim 3, wherein the switching circuit further comprises an electrostatic protection unit; the first end of the electrostatic protection unit is connected to the first pin of the switch unit, and the second end of the electrostatic protection unit is grounded.

9. The auxiliary power supply circuit according to any one of claims 1 to 8, wherein the dc power supply circuit comprises a start-up unit, a first main control unit, and a first power output unit; the first main control unit is used for outputting a first reference signal to the starting unit when receiving a first power supply signal, so that the starting unit generates a corresponding control voltage according to the first reference signal and outputs the control voltage to the first main control unit; when the control voltage is greater than a preset reference voltage, the first main control unit outputs a pulse control signal to the first power output unit according to the control voltage; the first power output unit is used for converting the electric energy input by the direct current source into the second voltage according to the pulse control signal.

10. An electronic device, characterized in that it comprises an auxiliary supply circuit as claimed in any one of claims 1-9.

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