Power switching circuit based on multi-voltage gradient interlocking and electronic equipment

Abstract

The utility model relates to the technical field of power supply, and discloses a power supply switching circuit based on multi-voltage gradient interlocking and electronic equipment, the power supply switching circuit comprises at least two power supply control circuits, each circuit has a corresponding priority, and the circuit with the high priority is provided with a priority control module, the priority control module controls a circuit where the priority control module is located to be switched on and controls a circuit with a lower priority to be switched off under the power supply of the target power port; the power supply control circuit supplies power to a target output port under the control of a priority control module arranged in the power supply control circuit, and controls a circuit with a higher priority to be switched off, thereby realizing interlocking among the circuits. Therefore, by implementing the power supply switching circuit, the switching operation of the power supply switching circuit can be simplified, the switching efficiency and the switching speed of the power supply switching circuit can be improved, meanwhile, the accuracy and the reliability of power supply switching are improved by setting corresponding priorities for different input voltages, and the diversity and the flexibility of power supply switching are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power supply technology field especially relates to a power supply switching circuit and electronic equipment based on multi -voltage gradient interlock. BACKGROUND

[0002] The power supply switching circuit on the market mostly adopts hard switch or integrated chip to realize, wherein, the power supply switching circuit through hard switch type device is: through hard switch type device forced switching, realizes the circuit breaking and closing of physics, such as boat type switch, relay, ac contactor, air switch etc.;The power supply switching circuit through integrated chip and peripheral semiconductor device soft switching, its component can be: ideal diode chip, hot plug chip, thyristor, MOSFET, IGBT etc.

[0003] In prior art, the advantage of the power supply switching circuit of hard switch type device is to rely on mechanical contact connection, and has high reliability, low price, simple control, can realize the isolation of control loop and power loop, but its defect is slow switching speed and cannot frequently disconnect and close circuit;The advantage of the power supply switching circuit based on integrated chip is low power consumption and fast switching speed, but its defect is that the reliability is not as good as hard switch, the isolation is poor, the control end and the controlled end of MOS tube share one ground, and the problem of the controlled end interfering with the control end may exist, and the cost is relatively high. It can be seen that how to improve the power supply switching efficiency and reliability is particularly important. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of power supply switching circuit and electronic equipment based on multi -voltage gradient interlock, it is favorable to improve the switching efficiency of power supply switching circuit, and it is favorable to improve the reliability of power supply switching.

[0005] In order to solve the above technical problems, the utility model discloses a kind of power supply switching circuit based on multi -voltage gradient interlock, the power supply switching circuit includes at least two power supply control circuits, the priority of each power supply control circuit is sorted from high to low, and the power supply end of each power supply control circuit is used to electrically connect target power port, the voltage output end of each power supply control circuit is used to electrically connect target output port, wherein:

[0006] For each of the power supply control circuits, when the priority of the power supply control circuit is not the first in the order, the power supply control circuit is provided with a control end, and the control end of the power supply control circuit is electrically connected to the enable end of the power supply control circuit with the priority in the first order; when the priority of the power supply control circuit is not the last in the order, the power supply control circuit is provided with a priority control module, the power end of the priority control module is used for electrically connecting the target power port, and the control end of the priority control module is used for electrically connecting the enable end of the power supply control circuit with the priority in the last order;

[0007] The priority control module is used for, when receiving the power supply voltage output by the target power port, controlling the circuit where the priority control module is located to be turned on, and controlling all the power supply control circuits electrically connected to the control end of the priority control module to be turned off, so that the priority of the circuit where the priority control module is located is higher than all the power supply control circuits electrically connected to the control end of the priority control module.

[0008] The power supply control circuit is used for, under the control of the priority control module, providing the power supply voltage to the target output port, and controlling all the power supply control circuits electrically connected to the control end of the power supply control circuit to be turned off, so as to realize the interlocking between each of the power supply control circuits.

[0009] As an optional implementation, in the first aspect of the utility model, each of the power supply control circuits comprises a power access detection module, an enable module and a turn-on control module, wherein:

[0010] The power end of the power access detection module and the power end of the turn-on control module are both used for electrically connecting the target power port, the voltage output end of the power access detection module and the voltage output end of the enable module are both electrically connected to the voltage input end of the turn-on control module, and the voltage output end of the turn-on control module is used for electrically connecting the target output port.

[0011] For each of the power supply control circuits, when the priority of the power supply control circuit is not the first in the order, the turn-on control module is provided with a control end, and the control end of the turn-on control module is electrically connected to the enable end of the enable module in all the power supply control circuits with the priority in the first order.

[0012] The enable end of the enable module is electrically connected to the control end of the priority control module in all the power supply control circuits with the priority in the first order and the control end of the turn-on control module in all the power supply control circuits with the priority in the last order, and the ground end of the power access detection module, the ground end of the enable module and the ground end of the turn-on control module are all used for grounding.

[0013] As an optional implementation, in the first aspect of the utility model, the conduction control module includes switch control unit and voltage output unit, wherein:

[0014] The voltage input end of the switch control unit is electrically connected with the voltage output end of the power access detection module and the voltage output end of the enable module, the voltage output end of the switch control unit is electrically connected with the voltage input end of the voltage output unit, the power end of the voltage output unit is used for electrically connecting the target power port, the voltage output end of the voltage output unit is used for electrically connecting the target output port, and the ground end of the switch control unit and the ground end of the voltage output unit are both used for grounding.

[0015] When the priority of the power control circuit where the conduction control module is located is not the first in the sequence, the switch control unit in the power control circuit is provided with a control end, and the control end of the switch control unit is electrically connected with the enable end of all the power control circuits with the first priority.

[0016] As an optional implementation, in the first aspect of the utility model, the voltage output unit includes first switch device, second switch device and first resistance, wherein:

[0017] The first pole of the first switch device, the second pole of the second switch device and one end of the first resistance are all electrically connected with the voltage output end of the switch control unit, the second pole of the first switch device is used for electrically connecting the target power port, the third pole of the first switch device and the second pole of the second switch device are both electrically connected with the other end of the first resistance, and the third pole of the second switch device is used for electrically connecting the target output port.

[0018] As an optional implementation, in the first aspect of the utility model, a plurality of parallel wires are arranged between the target power port and the second pole of the first switch device, and between the third pole of the first switch device, the second pole of the second switch device and the other end of the first resistance, for increasing the power-on path between the voltage output unit and the target power port and the target output port.

[0019] As an optional implementation, in the first aspect of the utility model, the switch control unit includes third switch device, energy storage capacitor, second resistance and third resistance, wherein:

[0020] The first pole of the third switch device is electrically connected with one end of the energy storage capacitor, a voltage output end of the power access detection module and a voltage output end of the enabling module, the second pole of the third switch device is electrically connected with one end of the second resistor, and the other end of the second resistor is electrically connected with the first pole of the first switch device, the first pole of the second switch device and one end of the first resistor;

[0021] When the power control circuit where the third switch device is located is the first in the priority order, the third pole of the third switch device is electrically connected with one end of the third resistor, and when the power control circuit where the third switch device is located is not the first in the priority order, the third pole of the third switch device is electrically connected with one end of the third resistor and the enabling end of the enabling module of all the power control circuits in the priority order;

[0022] The other end of the third resistor is used for grounding.

[0023] As an optional implementation, in the first aspect of the utility model, the power access detection module comprises a first stabilizing tube, a fourth resistor and a fifth resistor, wherein:

[0024] The cathode of the first stabilizing tube is electrically connected with one end of the fourth resistor, the other end of the fourth resistor is used for electrically connecting the target power port, the anode of the first stabilizing tube is electrically connected with one end of the fifth resistor, one end of the energy storage capacitor and the first pole of the third switch device, and the other end of the fifth resistor is used for grounding.

[0025] As an optional implementation, in the first aspect of the utility model, the enabling module comprises at least one fourth switch device, and the number of the fourth switch devices is the number of the power control circuits minus 1, wherein:

[0026] For each fourth switch device, the first pole of the fourth switch device is electrically connected with the control end of the priority control module in one of the power control circuits in the priority order, or the first pole of the fourth switch device is electrically connected with the third pole of the third switch device in one of the power control circuits in the priority order and one end of the third resistor in the power control circuit;

[0027] The second pole of the fourth switch device is electrically connected with the first pole of the third switch device in the switch control unit, and the third pole of the fourth switch device is used for grounding.

[0028] As an optional implementation, in the first aspect of the utility model, the priority control module comprises a second stabilizing tube, a fifth resistor and a sixth resistor, wherein:

[0029] The cathode of the second voltage stabilizing tube is electrically connected to one end of the fifth resistor, the other end of the fifth resistor is used for electrically connecting the target power port, the anode of the second voltage stabilizing tube is electrically connected to one end of the sixth resistor and the first pole of one of the fourth switch devices in each power supply control circuit in the back of the priority, and the other end of the sixth resistor is used for grounding.

[0030] The utility model discloses a second aspect of a kind of electronic equipment, the electronic equipment includes device ontology, and the electronic equipment further include the power supply switching circuit based on the interlock of multiple voltage gradient of any one described in the utility model first aspect.

[0031] The utility model has the advantages of the following beneficial effects:

[0032] In the embodiment of the utility model, when the priority control module receives the power supply voltage output by the target power port, the circuit where the priority control module is located is turned on, and all power supply control circuits electrically connected to the control end of the priority control module are turned off, so that the priority of the circuit where the priority control module is located is higher than all power supply control circuits electrically connected to the control end of the priority control module. And under the control of the priority control module, the power supply voltage is provided to the target output port, and all power supply control circuits electrically connected to the control end of the power supply control circuit are turned off, so as to realize the interlock between each power supply control circuit. It can be seen that the utility model controls the circuit where the priority control module is located to be turned on and controls the circuit with lower priority to be turned off under the power supply of the power supply voltage output by the target power port through the priority control module. And under the control of the priority control module set in the power supply control circuit, the power supply to the target output port is realized, and the circuit with higher priority is turned off, realizing the interlock between each circuit. The switching operation of the power supply switching circuit can be simplified, which is conducive to improving the switching efficiency and switching speed of the power supply switching circuit. At the same time, by setting corresponding priority for different input voltages, the accuracy and reliability of power supply switching are improved, and the diversity and flexibility of power supply switching are improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0034] Figure 1 It is a structure schematic view of the power supply switching circuit based on multiple voltage gradient interlock disclosed in the embodiment of the utility model.

[0035] Figure 2The utility model embodiment discloses another structure diagram of power switching circuit based on multi voltage gradient interlock.

[0036] Figure 3 The utility model embodiment discloses a structure diagram of conducting control module 104.

[0037] Figure 4 The utility model embodiment discloses still another structure diagram of power switching circuit based on multi voltage gradient interlock. DETAILED DESCRIPTION

[0038] In order to better understand and implement, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment, and obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without creative work belong to the range of the utility model protection.

[0039] It should be noted that, unless otherwise explicitly specified and limited, the term "electric connection" in the specification and claims of the utility model and the above-mentioned drawings should be understood broadly, for example, can be fixed electric connection, can be detachable electric connection or integrally electric connection, can be mechanical electric connection, can be electric electric connection or can communicate with each other, can be directly connected, can be indirectly connected through intermediate medium, can be the communication or interaction of two elements. In addition, the terms "first", "second" and the like in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish different objects, not to describe a specific order, and the terms "include" and "have" and any modification thereof are intended to cover non-exclusive inclusion. For the ordinary skill in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0040] The utility model discloses a kind of power switching circuit and electronic equipment based on multi voltage gradient interlock, can be controlled by priority control module in the power supply voltage of target power port output under the control of its being in circuit conduction and control priority lower circuit shutdown;And by the control of the priority control module set in its internal power control circuit, the power supply of target output port is realized, and the circuit of higher priority is controlled to be turned off, the interlock between each circuit is realized, the switching operation of power switching circuit can be simplified, it is favorable to improve the switching efficiency and switching speed of power switching circuit, simultaneously, by setting corresponding priority for different input voltage, the accuracy and reliability of power switching are improved, and power switching diversity and flexibility are improved. The following are described in detail respectively.

[0041] Embodiment one

[0042] Please refer to Figure 1 , Figure 1 The structure schematic diagram of the power supply switching circuit based on the multi-voltage gradient interlocking disclosed by the embodiment of the utility model. Among them, Figure 1 The power supply switching circuit based on the multi-voltage gradient interlocking described can be applied to any electronic product (such as image equipment, lighting lamps and lanterns, etc.) needing power supply, and the embodiment of the utility model does not limit. As Figure 1 The power supply switching circuit based on the multi-voltage gradient interlocking includes at least two power supply control circuits, and the priority of each power supply control circuit is sorted from high to low. Among them, Figure 1 The power supply switching circuit based on the multi-voltage gradient interlocking described is taken as an example that the power supply switching circuit includes two power supply control circuits. Among them, the power supply end of each power supply control circuit is used for electrically connecting the target power supply port, and the voltage output end of each power supply control circuit is used for electrically connecting the target output port, wherein:

[0043] For each power supply control circuit, when the priority of the power supply control circuit is not the first in the sorting, the power supply control circuit is provided with a control end, and the control end of the power supply control circuit is electrically connected with the enable end of the power supply control circuit with the priority sorted first. When the priority of the power supply control circuit is not the last in the sorting, the power supply control circuit is provided with a priority control module 101, the power supply end of the priority control module 101 is used for electrically connecting the target power supply port, and the control end of the priority control module 101 is used for electrically connecting the enable end of the power supply control circuit with the priority sorted last.

[0044] The priority control module 101 is used for controlling the circuit where the priority control module 101 is located to be turned on when receiving the power supply voltage output by the target power supply port, and controlling all power supply control circuits electrically connected with the control end of the priority control module 101 to be turned off, so that the priority of the circuit where the priority control module 101 is located is higher than all power supply control circuits electrically connected with the control end of the priority control module 101.

[0045] The power supply control circuit is used for providing the power supply voltage to the target output port under the control of the priority control module 101, and controlling all power supply control circuits electrically connected with the control end of the power supply control circuit to be turned off, so as to realize the interlocking between each power supply control circuit.

[0046] The power supply voltage outputted by the target power port connected to the power supply end of each power control circuit can be equal or unequal.

[0047] It can be seen that the power switching circuit based on the multi-voltage gradient interlocking can control the circuit to be turned on and the circuit with lower priority to be turned off under the power supply of the power supply voltage outputted by the target power port through the priority control module 101. Figure 1 The power switching circuit based on the multi-voltage gradient interlocking can control the circuit to be turned on and the circuit with lower priority to be turned off under the power supply of the power supply voltage outputted by the target power port through the priority control module 101.

[0048] In an optional embodiment, as shown in Figure 2 , the power switching circuit based on the multi-voltage gradient interlocking comprises two power control circuits, and each power control circuit comprises a power access detection module 102, an enable module 103 and a turn-on control module 104. Figure 2 Figure 2 Figure 2

[0049] ​​​The power input end of the power access detection module 102 and the power input end of the conduction control module 104 are used for electrically connecting a target power port, the voltage output end of the power access detection module 102 and the voltage output end of the enable module 103 are electrically connected to the voltage input end of the conduction control module 104, and the voltage output end of the conduction control module 104 is used for electrically connecting a target output port;

[0050] For each power control circuit, when the priority of the power control circuit is not the first in the sequence, the conduction control module 104 is provided with a control end, and the control end of the conduction control module 104 is electrically connected to the enable end of the enable module 103 in all power control circuits with a priority sequence in the first place;

[0051] The enable end of the enable module 103 is electrically connected to the control end of the priority control module 101 in all power control circuits with a priority sequence in the first place and the control end of the conduction control module 104 in all power control circuits with a priority sequence in the last place, and the ground end of the power access detection module 102, the ground end of the enable module 103 and the ground end of the conduction control module 104 are all used for grounding.

[0052] In the embodiment of the utility model, the power access detection module 102 is used for detecting the power supply condition of the target power port, and when detecting that the power supply voltage output by the target power port is received, the power supply voltage is guided to the conduction control module 104.

[0053] The conduction control module 104 is used for controlling the conduction of the conduction control module 104 under the power supply of the power access detection module 102 to provide the power supply voltage to the target output port, and controlling all power control circuits with a priority sequence in the first place to be turned off through the control end of the conduction control module 104.

[0054] The enable module 103 is used for controlling the conduction control module 104 to be turned off when receiving a high-level signal sent by the control end of any priority control module 101.

[0055] It can be seen that the embodiment Figure 2The described circuit can also detect the power supply condition of the target power port through the power access detection module 102, and when detecting that the power supply voltage output by the target power port is received, the power supply voltage is flowed to the conduction control module 104 to control the conduction control module 104 to be turned on, so as to provide the power supply voltage to the target output port. The detection of the power supply voltage by the power access detection module 102 can provide a suitable conduction voltage for the conduction control module 104, so as to supply power to the target output port through the conduction control module 104, instead of the traditional way of supplying power to the target output port through a hard switch / chip control, thereby improving the convenience and efficiency of supplying power to the target output port. The control end of the conduction control module 104 controls all power supply control circuits with higher priority to be turned off, and the enable module 103 controls the conduction control module 104 to be turned off when receiving a high-level signal sent by the control end of any priority control module 101. The control end of the conduction control module 104 and the enable end of the enable module 103 can realize interlocking between each power supply control circuit, so as to reduce the situation that when one branch is turned on, other branches are also turned on, and multiple branches are connected in parallel to supply power to the target output port, thereby reducing the situation that the power supply current is too large, and improving the accuracy, stability and reliability of supplying power to the target output port.

[0056] In this optional embodiment, as shown in Figure 3 , Figure 3 is a structure diagram of the conduction control module 104 disclosed in the embodiment of the utility model, Figure 3 The described power supply control circuit in which the conduction control module 104 is located is taken as an example of a power supply control circuit with a priority that is not the first, as shown in Figure 3 The conduction control module 104 includes a switch control unit 1041 and a voltage output unit 1042, wherein:

[0057] The voltage input end of the switch control unit 1041 is electrically connected to the voltage output end of the power access detection module 102 and the voltage output end of the enable module 103, the voltage output end of the switch control unit 1041 is electrically connected to the voltage input end of the voltage output unit 1042, the power supply end of the voltage output unit 1042 is used for electrically connecting the target power port, the voltage output end of the voltage output unit 1042 is used for electrically connecting the target output port, and the ground end of the switch control unit 1041 and the ground end of the voltage output unit 1042 are both used for grounding.

[0058] When the priority of the power supply control circuit in which the conduction control module 104 is located is not the first, the switch control unit 1041 in the power supply control circuit is provided with a control end, and the control end of the switch control unit 1041 is electrically connected to the enable end of all power supply control circuits with higher priority.

[0059] It should be noted that when the priority of the power control circuit in which the conduction control module 104 is located is the first, the switch control unit 1041 in the conduction control module 104 can not be provided with the control end for controlling the enable end of the other power control circuit, but directly controls the state of the other power control circuit through the priority control module 101 provided inside, which is beneficial to simplify the connection wire in the circuit; when the priority of the power control circuit in which the conduction control module 104 is located is not the first, the switch control unit 1041 in the conduction control module 104 can be provided with the control end for controlling the enable end of the other power control circuit, that is, the power control circuit can control the state of the power control circuit with the first priority through the control end of the switch control unit 1041 provided inside, and control the state of the power control circuit with the second priority through the priority control module 101 provided inside.

[0060] For example, it is assumed that the power switching circuit includes the power control circuit A, the power control circuit B, the power control circuit C and the power control circuit D, and the priority of the power control circuit A is the highest, the priority of the power control circuit B is the second highest, the priority of the power control circuit C is the third highest, and the priority of the power control circuit D is the lowest, at this time, for the power control circuit A, the power control circuit A can control the state of the power control circuit B, the power control circuit C and the power control circuit D through the priority control module 101 provided inside; for the power control circuit B, the power control circuit B can control the state of the power control circuit A through the control end of the switch control unit 1041 provided inside, and the power control circuit can control the state of the power control circuit C and the power control circuit D through the priority control module 101 provided inside; for the power control circuit D, the power control circuit D can control the state of the power control circuit A, the power control circuit B and the power control circuit C through the control end of the switch control unit 1041 provided inside.

[0061] It can be seen that the implementation Figure 3The described circuit can also be provided with a switch control unit 1041 and a voltage output unit 1042 in the conduction control module 104 of each power supply control circuit, can directly turn on the switch control unit 1041 under the control of the power access detection module 102, and then quickly and accurately realize the supply of the power supply voltage to the target output port through the voltage output unit 1042 through the switch control unit 1041, which is beneficial to improve the power supply efficiency; and the switch control unit 1041 is turned off under the control of the priority control module 101 in the power supply control circuit which is prioritized first in the enable module 103, and by setting the switch control unit 1041 connected with the enable module 103 controlled by the priority control module 101, the respective priority of each power supply control circuit can be realized, thereby improving the control accuracy and switching accuracy of each power supply control circuit; in addition, by setting the control end of the switch control unit 1041 and the priority control module 101 described above for the power supply control circuit, single power supply control of each power supply control circuit to the target output port can be realized, ensuring that only one power supply control circuit supplies power to the target output port at the same time, which is beneficial to reduce the situation that multiple circuits are turned on at the same time, causing the parallel connection of the circuits to cause excessive power supply current and damage the circuits, thereby playing the role of the power switching circuit, and being beneficial to improve the power supply accuracy and reliability of the power switching circuit.

[0062] In this alternative embodiment, optionally, as Figure 4 shown, Figure 4 is another structure schematic diagram of the power switching circuit based on the multi-voltage gradient interlocking disclosed in the embodiment of the utility model, wherein Figure 4 The described power switching circuit based on the multi-voltage gradient interlocking is taken as an example that the power switching circuit includes three power supply control circuits, wherein:

[0063] The voltage output unit 1042 includes first switching devices (i.e. Q1, Q3 and Q5 shown in Figure 4 ), second switching devices (i.e. Q2, Q4 and Q6 shown in Figure 4 ) and first resistors (i.e. R1, R2 and R3 shown in Figure 4 ), wherein the first pole of the first switching device, the second pole of the second switching device and one end of the first resistor are electrically connected to the voltage output end of the switch control unit 1041, the second pole of the first switching device is used for electrically connecting the target power port (i.e. V1, V2 and V3 shown in Figure 4 ), the third pole of the first switching device and the second pole of the second switching device are electrically connected to the other end of the first resistor, and the third pole of the second switching device is used for electrically connecting the target output port (i.e. V1, V2 and V3 shown in Figure 4(V_OUT shown). The first and second switching devices can be PMOS transistors, transistors, or other components that perform the same switching function; this embodiment of the invention is not limited in its application. When both the first and second switching devices are PMOS transistors, the first terminal of both the first and second switching devices is the gate, the second terminal of the first switching device is the drain, and the third terminal of the first switching device is the source; the second terminal of the second switching device is the source, and the third terminal of the second switching device is the drain. This allows the first and second switching devices to be turned on when the switch control unit 1041 is on, making the port connected to the third terminal of the first switching device the output, and supplying power to the port connected to the third terminal of the first switching device and the target output port connected to the third terminal of the second switching device, thus improving power supply accuracy and efficiency.

[0064] In this optional embodiment, optionally, such as Figure 4 As shown, multiple parallel wires are provided between the target power port and the second pole of the first switching device, and between the third pole of the first switching device and the second pole of the second switching device and the other end of the first resistor, to increase the power supply path between the voltage output unit 1042 and the target power port and the target output port. By setting multiple parallel wires, the power supply stability of the circuit can be improved, which is beneficial to improving the power supply accuracy and reliability.

[0065] In this optional embodiment, optionally, such as Figure 4 As shown, the switch control unit 1041 includes a third switching device (i.e., Figure 4 Q7, Q8, and Q9 shown), and energy storage capacitors (i.e. Figure 4 The C1, C2, and C3 shown in the diagram), and the second resistor (i.e. Figure 4 R6, R9, and R11 shown) and the third resistor (i.e. Figure 4 R14, R17, and R19 shown in the figure, wherein:

[0066] The first pole of the third switching device is electrically connected to one end of the energy storage capacitor, the voltage output terminal of the power supply detection module 102, and the voltage output terminal of the enable module 103. The second pole of the third switching device is electrically connected to one end of the second resistor, and the other end of the second resistor is electrically connected to the first pole of the first switching device, the first pole of the second switching device, and one end of the first resistor.

[0067] When the power supply control circuit where the third switch device is located is the first in the priority order, the third pole of the third switch device is electrically connected to one end of the third resistor; when the power supply control circuit where the third switch device is located is not the first in the priority order, the third pole of the third switch device is electrically connected to one end of the third resistor and the enable end of the enable module 103 of all the power supply control circuits in the priority order;

[0068] The other end of the third resistor is used for grounding. The third switch device can be an NMOS tube, a triode or other components capable of playing the same switching role, which is not limited in the embodiments of the present application. When the third switch device is an NMOS tube, the first pole of the third switch device is the gate, the second pole of the third switch device is the drain and the third pole of the third switch device is the source.

[0069] It can be seen that the optional embodiment can also turn on the third switch device to turn on the first switch device and the second switch device to start the external power supply, and turn off the third switch device to turn off the first switch device and the second switch device to stop working under the control of the enable module 103, which is beneficial to improve the start-stop control accuracy and efficiency of the circuit.

[0070] In the optional embodiment, as shown in Figure 4 , the power supply access detection module 102 comprises a first stabilizing tube (i.e. DZ2, DZ4 and DZ5 shown in Figure 4 ), a fourth resistor (i.e. R5, R8 and R10 shown in Figure 4 ) and a fifth resistor (i.e. R13, R16 and R18 shown in Figure 4 ), wherein the cathode of the first stabilizing tube is electrically connected to one end of the fourth resistor, the other end of the fourth resistor is used for electrically connecting the target power port, the anode of the first stabilizing tube is electrically connected to one end of the fifth resistor, one end of the energy storage capacitor and the first pole of the third switch device, and the other end of the fifth resistor is used for grounding. In this way, when the power supply accesses the target power port, a high-level signal is obtained on the fifth resistor through the fourth resistor and the first stabilizing tube, the energy storage capacitor in the switch control unit 1041 is charged, when the voltage of the energy storage capacitor rises to the turn-on threshold of the gate voltage of the third switch device (i.e. V th ), the third switch device is turned on, and the voltage is divided to the gate of the first switch device and the gate of the second switch device through the second resistor and the first resistor, at this time, the first switch device and the second switch device are turned on, and the target power port and the target output port start outputting, so that the components in the turn-on control module 104 are turned on by the first stabilizing tube to automatically output a high-level signal according to the accessed power supply voltage, which is beneficial to realize automatic and rapid power-on of the circuit.

[0071] In the optional embodiment, as shown in Figure 4 Fig. 1, the enabling module 103 comprises at least one fourth switch device (i.e. Q10-Q15 as shown in Figure 4 Fig. 1), and the number of the fourth switch device is the number of the power control circuit minus 1, wherein:

[0072] For each fourth switch device, the first pole of the fourth switch device is electrically connected to the control end of the priority control module 101 in one of the power control circuits which is ranked in the front, or the first pole of the fourth switch device is electrically connected to the third pole of the third switch device in one of the power control circuits which is ranked in the back and one end of the third resistor in the power control circuit;

[0073] The second pole of the fourth switch device is electrically connected to the first pole of the third switch device in the switch control unit 1041, and the third pole of the fourth switch device is used for grounding.

[0074] Wherein, the fourth switch device can be an NMOS tube, can also be a triode, and can also be other components which can play the same switching role, and the embodiments of the present application do not make limitation. When the fourth switch device is an NMOS tube, the first pole of the fourth switch device is a gate, the second pole of the fourth switch device is a drain, and the third pole of the fourth switch device is a source.

[0075] Exemplarily, as shown in Figure 4As shown in the power supply control circuit 10, the power supply control circuit 20 and the power supply control circuit 30, the first pole of the fourth switch device is electrically connected to the control end of the priority control module 101 in one of the power supply control circuits with the highest priority, specifically, the first pole of the fourth switch device Q12 in the power supply control circuit 20 is electrically connected to the control end of the priority control module 101 in the power supply control circuit 10, the first pole of the fourth switch device Q14 in the power supply control circuit 30 is electrically connected to the control end of the priority control module 101 in the power supply control circuit 20, and the first pole of the fourth switch device Q15 in the power supply control circuit 30 is electrically connected to the control end of the priority control module 101 in the power supply control circuit 10. The first pole of the fourth switch device is electrically connected to the third pole of the third switch device in one of the power supply control circuits with the lowest priority and one end of the third resistor in the power supply control circuit, specifically, the first pole of the fourth switch device Q10 in the power supply control circuit 10 is electrically connected to the third pole of the third switch device Q9 in the power supply control circuit 30 and one end of the third resistor R19, the first pole of the fourth switch device Q11 in the power supply control circuit 11 is electrically connected to the third pole of the third switch device Q8 in the power supply control circuit 20 and one end of the third resistor R17, and the first pole of the fourth switch device Q13 in the power supply control circuit 20 is electrically connected to the third pole of the third switch device Q9 in the power supply control circuit 30 and one end of the third resistor R19.

[0076] It can be seen that the optional embodiment can also achieve interlocking between each power supply control circuit by setting at least one fourth switch device, which is conducive to ensuring that only one power supply control circuit works normally at the same time and reducing the damage of the circuit caused by too large output current due to parallel connection of the circuit.

[0077] In the optional embodiment, as shown in Figure 4 , the priority control module 101 comprises a second zener diode (i.e. DZ1 and DZ3 shown in Figure 4 ), a fifth resistor (i.e. R4 and R7 shown in Figure 4 ) and a sixth resistor (i.e. R12 and R15 shown in Figure 4 ), wherein:

[0078] One end of the second zener diode is electrically connected to one end of the fifth resistor, the other end of the fifth resistor is used for electrically connecting the target power port, the anode of the second zener diode is electrically connected to one end of the sixth resistor and the first pole of one of the fourth switch devices in each power supply control circuit with the lowest priority, and the other end of the sixth resistor is used for grounding.

[0079] For example, as shown in Figure 4Taking the power control circuits 10, 20, and 30 shown as examples, the anode of the second Zener diode is connected to one end of the sixth resistor and the first terminal of one of the fourth switching devices in each power control circuit with subsequent priority. Specifically, the anode of the second Zener diode DZ1 in power control circuit 10 is connected to one end of the sixth resistor R12, the first terminal of the fourth switching device Q12 in power control circuit 20, and the first terminal of the fourth switching device Q15 in power control circuit 30; the anode of the second Zener diode DZ3 in power control circuit 20 is connected to one end of the sixth resistor R15 and one end of the fourth switching device Q14 in power control circuit 30.

[0080] As can be seen, this optional embodiment can also accurately divide the priority of each power control circuit by setting a priority control module 101 for some power control circuits, which is beneficial to improving the power-on accuracy and reliability of the circuit, thereby improving the control accuracy and reliability of power switching.

[0081] by Figure 4 Taking a power switching circuit based on multi-voltage gradient interlocking, which includes three power control circuits, as an example, the working principle of the power switching circuit based on multi-voltage gradient interlocking in this embodiment of the invention is as follows:

[0082] When power ports V1, V2, and V3 are all connected to power at the same time, V1, being the highest priority circuit, is used as the output port. Specifically, when V1, V2, and V3 are all connected to power, V1 passes through the fourth resistor R5, and the first Zener diode DZ2 receives a high level at the fifth resistor R13, charging the energy storage capacitor C1. When the voltage of capacitor C1 rises to the turn-on threshold Vth of the gate voltage of the third switching device Q7, Q7 will turn on. At this time, the first resistor R1 and the second resistor R6 act as voltage divider resistors, driving the gates of the first switching device Q1 and the second switching device Q2, turning on Q1 and Q2, thus turning on the circuit containing V1. V1 and the target output port V_OUT begin outputting. Simultaneously, V1 passes through the fifth resistor R4, and the second Zener diode DZ1 receives a high level at the sixth resistor R12, connecting to the enable terminals of the circuits containing V2 and V3 (i.e.,...). Figure 4 The gates of the fourth switching device Q12 and Q15 shown in the figure control Q12 and Q15 to be turned on. At this time, the third switching devices Q8 and Q9 are turned off, the first switching devices Q3 and Q5 and the second switching devices Q4 and Q6 are also turned off, so V2 and V3 cannot be output.

[0083] Similarly, when the power ports V2 and V3 are connected to the power supply at the same time, since the priority of the circuit where V2 is located is higher than that of the circuit where V3 is located, V2 is used as the output port at this time, specifically: when V2 and V3 are connected to the power supply at the same time, through V2, the fourth resistor R8, the first voltage stabilizing tube DZ4 obtains a high level on the fifth resistor R16, and the charging of the energy storage capacitor C2 is realized; when the voltage of the capacitor C2 rises to the conduction threshold Vth of the gate voltage of the third switching device Q8, Q8 will be turned on, at this time, the first resistor R2 and the second resistor R9 are used as a divided voltage to drive the gates of the first switching device Q3 and the second switching device Q4, so that Q3 and Q4 are turned on, and V2 and the target output port V_OUT start to output; at the same time, V2 passes through the fifth resistor R7, and the second voltage stabilizing tube DZ3 obtains a high level on the sixth resistor R15, which is connected to the enable end of the circuit where V3 is located (i.e. the gate of Q14 shown in Figure 4 the priority control module 101 controls Q14 to be turned on, at this time, the third switching device Q9 is turned off, and the first switching device Q5 and the second switching device Q6 are also in the off state, so V3 cannot output; at this time, if the power port V1 is suddenly connected to the power supply, since Q8 is turned on, a high level is obtained on the third resistor R17, which is connected to the enable end of the circuit where V1 is located (i.e. the gate of Q11 shown in Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure 4 Figure the priority control module 101 controls Q14 to be turned on, at this time, the third switching device Q9 is turned off, and the first switching device Q5 and the second switching device Q6 are also in the off state, so V3 cannot output; at this time, if the power port V1 is suddenly connected to the power supply, since Q8 is turned on, a high level is obtained on the third resistor R17, which is connected to the enable end of the circuit where V1 is located (i.e. the gate of Q11 shown in

[0084] Embodiment Two

[0085] The utility model discloses an electronic equipment. Among them, the electronic equipment includes the equipment ontology, and the electronic equipment still includes the power switching circuit based on multiple voltage gradient interlock as any one description in embodiment one. It needs to be explained, for the detailed description of the power switching circuit based on multiple voltage gradient interlock, please refer to the specific description of the relevant content in embodiment one, and this embodiment will not be repeated.

[0086] It can be seen that the electronic equipment can control the circuit to be turned on and the circuit with lower priority to be turned off by the power supply voltage outputted by the priority control module at the target power port, and the power supply of the target output port can be controlled and the circuit with higher priority can be turned off by the power control circuit under the control of the priority control module arranged in the power control circuit, so that the interlocking between each circuit is realized, the switching operation of the power switching circuit is simplified, the switching efficiency and speed of the power switching circuit are improved, the accuracy and reliability of the power switching are improved by setting the corresponding priority for different input voltages, and the diversity and flexibility of the power switching are improved.

[0087] The above describes the splicing circuit and the electronic equipment in the embodiments of the utility model in detail, and the principle and implementation mode of the utility model are described in the text by applying specific embodiments. However, the above preferred embodiments are not used to limit the utility model, and the above embodiment is only used to help understand the method and core idea of the utility model. Meanwhile, according to the idea of the utility model, the specific implementation mode and application range can be changed without departing from the spirit and scope of the utility model, so the protection scope of the utility model is limited by the scope defined by the claims.

Claims

1. A power switching circuit based on multi-voltage gradient interlocking, characterized in that, The power switching circuit includes at least two power control circuits, each power control circuit being ordered from high to low priority, and the power supply terminal of each power control circuit being used to electrically connect to the target power port, and the voltage output terminal of each power control circuit being used to electrically connect to the target output port, wherein: For each of the power control circuits, when the priority of the power control circuit is not the highest in the sorting, the power control circuit is provided with a control terminal, and the control terminal of the power control circuit is electrically connected to the enable terminals of all power control circuits with the highest priority in the sorting; when the priority of the power control circuit is not the lowest in the sorting, the power control circuit is provided with a priority control module (101), the power terminal of the priority control module (101) is used to electrically connect to the target power port, and the control terminal of the priority control module (101) is used to electrically connect to the enable terminals of the power control circuits with the lowest priority in the sorting; The priority control module (101) is used to control the circuit where the priority control module (101) is located to be turned on when the power supply voltage output by the target power port is received, and to control all power control circuits electrically connected to the control terminal of the priority control module (101) to be turned off, so that the priority of the circuit where the priority control module (101) is located is higher than that of all power control circuits electrically connected to the control terminal of the priority control module (101). The power control circuit is used to provide the power supply voltage to the target output port under the control of the priority control module (101), and to control all power control circuits electrically connected to the control terminal of the power control circuit to shut down, so as to achieve interlocking between each power control circuit.

2. The power switching circuit based on multi-voltage gradient interlocking according to claim 1, characterized in that, Each of the power control circuits includes a power access detection module (102), an enable module (103), and a conduction control module (104), wherein: The power supply terminal of the power supply access detection module (102) and the power supply terminal of the conduction control module (104) are both used to electrically connect to the target power port. The voltage output terminal of the power supply access detection module (102) and the voltage output terminal of the enable module (103) are both electrically connected to the voltage input terminal of the conduction control module (104). The voltage output terminal of the conduction control module (104) is used to electrically connect to the target output port. For each of the power control circuits, when the priority of the power control circuit is not the highest in the sorting, the conduction control module (104) is provided with a control terminal, and the control terminal of the conduction control module (104) is electrically connected to the enable terminal of the enable module (103) in all the power control circuits with the highest priority. The enable terminal of the enable module (103) is electrically connected to the control terminal of the priority control module (101) in all the power control circuits with the highest priority and the control terminal of the conduction control module (104) in all the power control circuits with the lowest priority. The ground terminal of the power access detection module (102), the ground terminal of the enable module (103) and the ground terminal of the conduction control module (104) are all used for grounding.

3. The power switching circuit based on multi-voltage gradient interlocking according to claim 2, characterized in that, The conduction control module (104) includes a switch control unit (1041) and a voltage output unit (1042), wherein: The voltage input terminal of the switch control unit (1041) is electrically connected to the voltage output terminal of the power access detection module (102) and the voltage output terminal of the enable module (103). The voltage output terminal of the switch control unit (1041) is electrically connected to the voltage input terminal of the voltage output unit (1042). The power supply terminal of the voltage output unit (1042) is used to electrically connect to the target power port. The voltage output terminal of the voltage output unit (1042) is used to electrically connect to the target output port. The grounding terminal of the switch control unit (1041) and the grounding terminal of the voltage output unit (1042) are both used for grounding. When the power control circuit where the conduction control module (104) is located is not the first in priority, the switch control unit (1041) in the power control circuit is provided with a control terminal, and the control terminal of the switch control unit (1041) is electrically connected to the enable terminal of all power control circuits with the highest priority.

4. The power switching circuit based on multi-voltage gradient interlocking according to claim 3, characterized in that, The voltage output unit (1042) includes a first switching device, a second switching device, and a first resistor, wherein: The first pole of the first switching device, the second pole of the second switching device, and one end of the first resistor are all electrically connected to the voltage output terminal of the switch control unit (1041). The second pole of the first switching device is used to electrically connect to the target power port. The third pole of the first switching device and the second pole of the second switching device are all electrically connected to the other end of the first resistor. The third pole of the second switching device is used to electrically connect to the target output port.

5. The power switching circuit based on multi-voltage gradient interlocking according to claim 4, characterized in that, Multiple parallel wires are provided between the target power port and the second pole of the first switching device, and between the third pole of the first switching device and the second pole of the second switching device and the other end of the first resistor, to increase the power supply path between the voltage output unit (1042) and the target power port and the target output port.

6. The power switching circuit based on multi-voltage gradient interlocking according to claim 4 or 5, characterized in that, The switch control unit (1041) includes a third switching device, an energy storage capacitor, a second resistor, and a third resistor, wherein: The first pole of the third switching device is electrically connected to one end of the energy storage capacitor, the voltage output terminal of the power supply access detection module (102) and the voltage output terminal of the enable module (103), the second pole of the third switching device is electrically connected to one end of the second resistor, and the other end of the second resistor is electrically connected to the first pole of the first switching device, the first pole of the second switching device and one end of the first resistor. When the power control circuit where the third switching device is located has the highest priority, the third pole of the third switching device is electrically connected to one end of the third resistor. When the power control circuit where the third switching device is located does not have the highest priority, the third pole of the third switching device is electrically connected to one end of the third resistor and the enable terminal of the enable module (103) of all power control circuits with the highest priority. The other end of the third resistor is used for grounding.

7. The power switching circuit based on multi-voltage gradient interlocking according to claim 6, characterized in that, The power supply detection module (102) includes a first Zener diode, a fourth resistor, and a fifth resistor, wherein: The cathode of the first Zener diode is electrically connected to one end of the fourth resistor, and the other end of the fourth resistor is used to electrically connect to the target power port. The anode of the first Zener diode is electrically connected to one end of the fifth resistor, one end of the energy storage capacitor, and the first pole of the third switching device, and the other end of the fifth resistor is used to ground.

8. The power switching circuit based on multi-voltage gradient interlocking according to any one of claims 3, 4, 5, and 7, characterized in that, The enabling module (103) includes at least one fourth switching device, and the number of the fourth switching devices is one less than the number of the power control circuits, wherein: For each of the fourth switching devices, the first pole of the fourth switching device is electrically connected to the control terminal of the priority control module (101) in one of the power control circuits with the highest priority, or the first pole of the fourth switching device is electrically connected to the third pole of the third switching device in one of the power control circuits with the lowest priority and one end of the third resistor in the power control circuit. The second pole of the fourth switching device is electrically connected to the first pole of the third switching device in the switch control unit (1041), and the third pole of the fourth switching device is used for grounding.

9. The power switching circuit based on multi-voltage gradient interlocking according to claim 8, characterized in that, The priority control module (101) includes a second Zener diode, a fifth resistor, and a sixth resistor, wherein: The cathode of the second Zener diode is electrically connected to one end of the fifth resistor, the other end of the fifth resistor is used to electrically connect to the target power port, the anode of the second Zener diode is electrically connected to one end of the sixth resistor and the first pole of one of the fourth switching devices in each power control circuit with the next priority, and the other end of the sixth resistor is used to ground.

10. An electronic device, the electronic device comprising a device body, characterized in that, The electronic device further includes a power switching circuit based on multi-voltage gradient interlock as described in any one of claims 1-9.

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