WO2019184363A1 - Power supply system for reducing power consumption and electronic device - Google Patents

Abstract

A power supply system for reducing power consumption and an electronic device. The power supply system comprises: a restart circuit (1) and a controllable power supply circuit (2), wherein one end of the controllable power supply circuit (2) is connected to a power supply source, and the other end of the controllable power supply circuit (2) is connected to a system power supply port (3); a control end of the controllable power supply circuit (2) is connected to a microprocessor; the restart circuit (1) is connected to the system power supply port (3), and the system power supply port (3) is connected to the microprocessor; the controllable power supply circuit (2) is turned off or on under the control of the microprocessor so as to cut off or provide power to the system. The restart circuit (1) is used for restoring the power supply to the microprocessor by providing a power supply signal to the system power supply port after the system power supply is cut off, so that the microprocessor controls the controllable power supply circuit (2) to be turned on after the power supply is restored. The power supply system can effectively reduce the power consumption of the device and has a simple circuit, and conventional components are used to effectively save costs.

Description

Power supply system and electronic equipment for reducing power consumption

The application claims the priority of the Chinese Patent Application No. 201820433623.1 filed on March 29, 2018, which is entitled "Power Supply System and Electronic Equipment for Reducing Power Consumption", the entire contents of which are incorporated herein by reference. in.

Technical field

The present application relates to the field of electronics, and in particular, to a power supply system and an electronic device for reducing power consumption.

Background technique

With the rapid development of electronic technology, electronic devices are gradually developing towards miniaturization and integration. At the same time, in order to meet the continuous improvement of people's requirements for product experience, various functions of devices are continuously enhanced and optimized. Accordingly, the enhancement of device functions is often This will result in an increase in the power consumption of the device.

Power consumption is one of the important issues in the electronics field. For example, the power consumption of electronic devices can affect the battery life and storage time of the device. Therefore, in different design scenarios of electronic devices, such as the field of drone batteries, it is often necessary to consider how to reduce the power consumption of the device.

Summary of the invention

The present application provides a power supply system and an electronic device for reducing power consumption, which can effectively reduce power consumption of the device.

A first aspect of the present application is to provide a power supply system for reducing power consumption, including: a restart circuit and a controllable power supply circuit;

One end of the controllable power supply circuit is connected to a power supply, and the other end of the controllable power supply circuit is connected to a system power supply port, and the control end of the controllable power supply circuit is connected to the microprocessor; The system power supply port is connected, and the system power supply port is connected to the microprocessor;

The controllable power supply circuit is configured to be turned off or turned on under the control of the microprocessor to cut off or provide power to the system;

The restarting circuit is configured to resume power supply to the microprocessor by providing a power supply signal to the system power supply port after the system power supply is cut off, so that the microprocessor controls the power after restoring power supply The controllable power supply circuit is turned on.

Preferably, the power supply system further includes: a system power chip disposed between the controllable power supply circuit and the power supply port of the system;

An input end of the system power chip is connected to the controllable power supply circuit, and an output end of the system power chip is connected to the system power supply port.

Preferably, the controllable power supply circuit comprises: a first controllable component and a second controllable component;

a control pole of the second controllable element is coupled to the microprocessor, an output pole of the second controllable element is grounded, and a supply electrode of the second controllable element is coupled to the first controllable element For turning off or conducting under the control of the microprocessor when system power is supplied;

a control electrode of the first controllable element is connected to a supply electrode of the restart circuit and the second controllable element, and an output pole of the first controllable element is connected to the power supply, the first a supply electrode of the control element is coupled to an input of the system power chip for turning off or conducting under linkage of the second controllable element when system power is supplied, and also for restarting Conducted under the control of the circuit.

Preferably, the restart circuit comprises: a switching element;

One end of the switching element is connected to a control pole of the first controllable element, and the other end of the switching element is grounded for controlling the first controllable element to be turned on when the switching element is closed.

Preferably, the power supply system further includes: a first diode and the first resistor disposed between the switching element and the second controllable element;

The anode of the first diode is connected to the switch detection port, and the cathode of the first diode is connected to one end of the switching element;

One end of the first resistor is connected to a cathode of the first diode, and the other end of the first resistor is connected to a supply electrode of the second controllable element.

Preferably, the controllable power supply circuit further includes: a second diode disposed between the power supply and the first controllable element;

The anode of the second diode is connected to the power supply, and the cathode of the second diode is connected to the output of the first controllable element.

Preferably, the controllable power supply circuit further includes: a second resistor and a third resistor disposed between the first controllable element and the second controllable element;

One end of the second resistor is connected to an output pole of the first controllable element, and the other end of the second resistor is connected to a control pole of the first controllable element;

One end of the third resistor is connected to a control electrode of the first controllable element, and the other end of the third resistor is connected to a supply electrode of the second controllable element.

Preferably, the controllable power supply circuit further includes: a fourth resistor;

One end of the fourth resistor is connected to the control electrode of the second controllable element, and the other end of the fourth resistor is grounded.

Preferably, the first controllable component is a PMOS transistor, and the second controllable component is an NMOS transistor; and the control of the first controllable component and the second controllable component is a gate, the first The power supply of the controllable element and the second controllable element is extremely drained, and the outputs of the first controllable element and the second controllable element are extremely source; or

The first controllable component is a PNP transistor, and the second controllable component is an NPN transistor; the first controllable component and the second controllable component are controlled to be a base, the first controllable component The power supply to the second controllable element is extremely collector, and the outputs of the first controllable element and the second controllable element are extremely emitters.

Preferably, the restart circuit includes a branch connecting an input end of the system power chip and a charging port;

The restart circuit is configured to transmit a power supply signal received by the charging port to an input end of the system power chip to provide a power supply signal to the system power supply port through the system power chip.

Preferably, the restart circuit further includes a third diode connected in series in the branch;

The anode of the third diode is connected to the charging port, and the cathode of the third diode is connected to the input end of the system power chip.

Preferably, the power supply system further includes: an input filter capacitor and/or an output filter capacitor;

One end of the input filter capacitor is connected to an input end of the system power chip, and the other end of the input filter capacitor is grounded;

One end of the output filter capacitor is connected to an output end of the system power chip, and the other end of the output filter capacitor is grounded.

Preferably, the power supply system further includes: a fifth resistor and a sixth resistor;

One end of the fifth resistor is connected to an input end of the system power chip, and the other end of the fifth resistor is connected to one end of the sixth resistor and an enable end of the system power chip;

The other end of the sixth resistor is grounded.

A second aspect of the present application is to provide an electronic device including: a microprocessor, and a power supply system for reducing power consumption as described in any of the foregoing;

The control end of the controllable power supply circuit in the power supply system is coupled to the microprocessor.

Preferably, the electronic device is a drone.

The power supply system and the electronic device for reducing power consumption provided by the application include a restart circuit and a controllable power supply circuit connected between the battery and the system power supply port, and the controllable power supply circuit can be controlled under the control of the microprocessor Broken or turned on. When the system is powered normally, the microprocessor controls the controllable power supply circuit to be continuously turned on to enable the battery to supply power to the entire device system. In order to reduce power consumption when the system is not required to operate, the microprocessor controls the controllable power supply circuit to be turned off, thereby cutting off the power supply of the entire system, including powering the microprocessor. When it is necessary to restore the system power supply, based on the restart circuit, the microprocessor is first powered by the system power supply port. When the microprocessor is powered, the controllable power supply circuit can be controlled to be turned on, thereby finally realizing the system to restore power. Based on the solution, the flexible control of the entire system power can be realized, thereby effectively reducing the power consumption of the device, and the circuit of the solution is simple, and some conventional components are used, which can effectively save costs.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application. Other figures may also be obtained from those of ordinary skill in the art in view of these figures.

1 is a schematic structural diagram of a power supply system for reducing power consumption according to Embodiment 1 of the present application;

2 is a schematic structural diagram of a power supply system for reducing power consumption according to Embodiment 2 of the present application;

3 is a schematic structural diagram of a power supply system for reducing power consumption according to Embodiment 3 of the present application;

4A-4B are diagrams showing an example of a structure of a power supply system for reducing power consumption according to Embodiment 3 of the present application;

5A-5B are schematic diagrams showing the structure of a power supply system for reducing power consumption according to Embodiment 4 of the present application.

detailed description

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present application. It is a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application are within the scope of the present disclosure.

All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention applies, unless otherwise defined. The terminology used herein is for the purpose of describing particular embodiments, and is not intended to be limiting. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items. Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The features of the embodiments and examples described below can be combined with each other without conflict. It should be noted that “first” and “second” in this document are only used for distinguishing, and the order is not limited.

1 is a schematic structural diagram of a power supply system for reducing power consumption according to Embodiment 1 of the present application. Referring to FIG. 1 , the present embodiment provides a power supply system for reducing power consumption. The power consumption is reduced by powering the control system. Specifically, the power supply system includes:

Restarting circuit 1 and controllable power supply circuit 2;

Wherein, one end of the controllable power supply circuit 2 is connected to the power supply BAT, and the other end of the controllable power supply circuit 2 is connected to the system power supply port 3. The control end of the controllable power supply circuit 2 is connected to a microprocessor (not shown). The restart circuit 1 is directly or indirectly connected to the system power supply port 3, and the system power supply port 3 is connected to the microprocessor;

The controllable power supply circuit 2 is configured to be turned off or turned on under the control of the microprocessor to cut off or provide power to the system;

The restart circuit 1 is configured to restore the power supply to the microprocessor by supplying a power supply signal to the system power supply port 3 after the system power supply is cut off, so that the microprocessor controls the controllable power supply circuit 2 to be turned on after the power supply is restored.

The power supply system for reducing power consumption provided by the present application can be applied to control of system power supply in various electronic devices. In practical applications, electronic devices include, but are not limited to, electronic devices such as drones, computers, and mobile phones. In particular, it can be applied to miniaturized electronic devices such as drones. Taking the UAV as an example, such a miniaturized device has a small space and a limited space, so the integration of the power supply system is required. The circuit structure of the present application is simple, and it is easy to achieve high integration, and it is not necessary to use a chip or a complicated circuit that occupies a large space. Reduce power consumption and restore power to the device.

Specifically, the power supply BAT is a system power supply for the electronic device. For example, for some electronic devices in which the battery can be installed, the battery installed to the electronic device provides the system power supply of the electronic device. In practical applications, since the electronic device is internally configured with different modules, in consideration of the stability of use of the electronic device, the system power supply port 3 is set in the solution, and the system module can be connected to the system power supply port 3 to implement system power supply. In addition, a controllable power supply circuit is provided between the power supply BAT and the system power supply port to control the power supply of the entire system by controlling the controllable power supply circuit to be turned on or off.

For example, in the real scene scenario, the controllable power supply circuit 2 in the present scheme is used to control the power supply of the entire system, that is, the system power supply port 3 is responsible for transmitting power supply signals to the respective modules of the entire system. Specifically, when the controllable power supply circuit 2 is turned on, the electrical signal provided by the power supply BAT can be transmitted to the system power supply port 3 through the controllable power supply circuit 2, thereby supplying power to the entire system. Conversely, when the controllable power supply circuit 2 is turned off, since the path between the power supply BAT and the system power port 3 is cut off, the electrical signal provided by the power supply BAT cannot be transmitted to the system power supply port 3 through the controllable power supply circuit 2. , thus cutting off the power supply of the entire system.

Specifically, the on or off state of the controllable power supply circuit 2 can be controlled to be switched based on a control signal from the microprocessor. As an example, as shown in the figure, the controllable power supply circuit 2 can receive the micro The control signal On_Off of the processor is turned on or off under the control of the signal.

Further, the power supply for the whole system mentioned here means that the modules that need to be powered in the entire system can select the power supply signal according to their own needs, and does not mean that all system modules are in the working state. For example, in the case where the entire system is powered, the individual modules in the system can still be powered separately based on the system power supply, that is, the power supply or power-off control of some modules can still be performed, but the power supply of some modules does not affect the entire system. Power supply status.

In this solution, the microprocessor is connected to the system power supply port 3, that is, the power supply of the microprocessor is also provided by the electrical signal at the system power supply port. It can be understood that when the controllable power supply circuit 2 is turned on, the whole system realizes power supply. Similarly, the microprocessor is also in a state of being normally powered. When the microprocessor is powered, it can perform some functional operations, for example, A control signal or the like for controlling its turning on or off is sent to the controllable power supply circuit 2. When the controllable power supply circuit 2 is turned off, the power supply of the entire system is cut off. Similarly, the power supply to the microprocessor is also cut off, that is, the microprocessor will be in a power-off state.

In some scenarios, in order to reduce the power consumption of the device, similar optimization system software or separate power supply to the module may be adopted. In the latter case, the power supply of different modules is provided by different power supply ports, or the power supply of different modules is controlled by the turn-off or conduction of different controllable elements. When some modules do not need to be run, the power to the part of the module can be cut off. However, in the above solution, in order to ensure subsequent power supply recovery, only some modules can be powered off, and the power consumption reduction effect is limited.

In this solution, the microprocessor is connected to the system power supply port 3, and the system power supply port 3 controls the power supply of the entire system (including the microprocessor), not just the power supply of some modules. Therefore, when the system is in a standby or hibernation operation, the microprocessor can control the controllable power supply circuit 2 to be turned off to implement power-off of the entire system (including the microprocessor), thereby reducing the running module. The power consumption is reduced, the power consumption is reduced more effectively, and the power consumption caused by the leakage current of components in the system circuit can be effectively avoided after the power is turned off, thereby further improving the power consumption reduction effect. At the same time, by setting the restart circuit 1, the solution can realize power restoration when the entire system is powered off, and ensure the normal use of the electronic device while reducing power consumption.

Specifically, when the system needs to run again, that is, when the system needs to be restored, the electrical circuit can be provided to the system power supply port through the restart circuit to supply power to the system within a certain period of time. During powering the system through the restart circuit, it can be understood that the microprocessor connected to the system power supply port 3 is also powered, and the microprocessor that supplies the power can send a control signal to the controllable power supply circuit 2 to control its conduction. Realize the power restoration of the system. Thereafter, even if the restart circuit no longer supplies an electrical signal to the system power supply port 3, the controllable power supply circuit 2 that is already in an on state under the control of the microprocessor can transmit the electrical signal provided by the power supply BAT to the system power supply port 3, forming The power supply circuit ensures the power supply of the system (including the microprocessor), thereby restoring system power.

The connection in this solution may be a direct connection or an indirect connection. As an example of the connection between the restart circuit 1 and the system power supply port 3, the connection here may mean that the restart circuit 1 is directly connected to the system power supply port 3; or the restart circuit 1 is indirectly connected to the system power supply port 3, that is, between the two Other components may also be connected, for example, a system power chip for pre-processing electrical signals may be provided.

In practical applications, in order to protect the system power supply BAT and the entire system, before the electrical signal of the system power supply BAT is output to the entire system, the electrical signal needs to be pre-processed to provide stable, low noise, and low ripple. Power supply signal.

The power supply system for reducing power consumption provided by the embodiment includes a restart circuit and a controllable power supply circuit connected between the battery and the system power supply port, and the controllable power supply circuit can be turned off under the control of the microprocessor or Turn on. When the system is powered normally, the microprocessor controls the controllable power supply circuit to be continuously turned on to enable the battery to supply power to the entire device system. In order to reduce power consumption when the system is not required to operate, the microprocessor controls the controllable power supply circuit to be turned off, thereby cutting off the power supply of the entire system, including powering the microprocessor. When it is necessary to restore the system power supply, based on the restart circuit, the microprocessor is first powered by the system power supply port. When the microprocessor is powered, the controllable power supply circuit can be controlled to be turned on, thereby finally realizing the system to restore power. Based on the solution, the flexible control of the entire system power can be realized, thereby effectively reducing the power consumption of the device, and the circuit of the solution is simple, and some conventional components are used, which can effectively save costs.

Optionally, FIG. 2 is a schematic structural diagram of a power supply system for reducing power consumption according to Embodiment 2 of the present application. Referring to FIG. 2, the embodiment provides a power supply system for reducing power consumption. The power supply system is configured to ensure the stability of the power supply on the basis of the power consumption of the control system to reduce the power consumption. Specifically, the power supply system may further include: the controllable power supply circuit 2 is configured on the basis of any of the embodiments. System power supply chip U1 between system power supply port 3;

The input end of the system power chip U1 is connected to the controllable power supply circuit 2, and the output end of the system power chip U1 is connected to the system power supply port 3.

For example, in the actual scenario, the electrical signal provided by the system power supply BAT is transmitted to the input end of the system power supply chip U1 through the conductive controllable power supply circuit 2, and the power supply signal output through the processing of the system power supply chip U1 is transmitted to the system power supply port. 3. Realize power supply to the entire system including the microprocessor. Optionally, the system power chip U1 can be selected according to the needs of the circuit design. For example, the system power chip U1 can be a low dropout linear regulator, and the solution is not limited herein. In practical applications, the NC pin of the low dropout linear regulator can be left floating.

Preferably, the power supply system may further include: an input filter capacitor C1 and/or an output filter capacitor C2; wherein

One end of the input filter capacitor C1 is connected to the input end of the system power chip U1, and the other end of the input filter capacitor C1 is grounded;

One end of the output filter capacitor C2 is connected to the output end of the system power chip U1, and the other end of the output filter capacitor C2 is grounded.

As shown in the figure, in the embodiment, a filter circuit is further provided for the system power chip U1. Specifically, an input filter circuit and/or an output filter circuit may be disposed. Optionally, in the embodiment, the input filter circuit and the output filter circuit comprise a filter capacitor.

By setting the filter circuit, the input signal and the output signal of the system power chip can be filtered, thereby optimizing the power supply signal and ensuring the stability and reliability of the power supply signal.

The foregoing two implementation manners may be implemented separately, or may be implemented in combination, that is, both input filtering and output filtering are implemented, thereby improving power supply quality.

Further preferably, in order to further improve the signal quality of the system power chip, the power supply system further includes: a fifth resistor R2 and a sixth resistor R5;

One end of the fifth resistor R2 is connected to the input end of the system power chip U1, and the other end of the fifth resistor R2 is connected to one end of the sixth resistor R5 and the enable end of the system power chip U1;

The other end of the sixth resistor R5 is grounded.

Specifically, the fifth resistor R2 and the sixth resistor R5 can be used as voltage dividing resistors of the system power chip U1 to optimize the operating performance of the system power chip and improve the quality of the power supply signal.

The power supply system for reducing power consumption provided by the embodiment provides a pre-processing of the electrical signal by using the system power chip to improve the quality of the power supply signal by outputting the electrical signal of the power supply to the system for power supply. Protect equipment systems and power supplies.

Specifically, the controllable power supply circuit 2 in the present solution is used to be turned on or off under the control of the microprocessor, and the implementation manner thereof may be various. Preferably, FIG. 3 is a schematic structural diagram of a power supply system for reducing power consumption according to Embodiment 3 of the present application. Referring to FIG. 3, the embodiment provides a power supply system for reducing power consumption. The power supply system is used to ensure the stability and reliability of the system power supply control on the basis of controlling the power supply of the system to reduce the power consumption. Specifically, based on any embodiment, the controllable power supply circuit 2 may include: the first controllable Element 21 and second controllable element 22;

The control electrode of the second controllable element 22 is connected to a microprocessor (not shown), the output of the second controllable element 22 is grounded, and the supply electrode of the second controllable element 22 is connected to the first controllable element 21, When the system power is supplied, it is turned off or turned on under the control of the microprocessor;

The control pole of the first controllable element 21 is connected to the supply electrode of the restart circuit 1 and the second controllable element 22, the output pole of the first controllable element 21 is connected to the power supply BAT, and the supply electrode of the first controllable element 21 is The input of the system power chip U1 is connected for being turned off or turned on under the linkage of the second controllable element 22 when the system power is supplied, and is also used to be turned on under the control of the restart circuit 1.

For example, as shown in the actual scenario, the microprocessor in the power supply state can send a control signal On_Off to the second controllable component 22, and the control signal On_Off can be a high level or a low level signal to control The second controllable element 22 is turned on or off, thereby controlling the first controllable element 21 to be turned on or off in conjunction with each other. When the first controllable element 21 is turned off, since the path between the power supply and the system power supply port is disconnected, the system power supply is cut off, thereby effectively reducing system power consumption.

In the case that the system power supply is cut off, the power supply of the microprocessor is also cut off, so the microprocessor at this time does not send a control signal to the second controllable element 22, so the solution is not based on the microprocessor to the second controllable The component 22 sends a control signal to achieve recovery of the system power supply, but the restart control circuit 1 temporarily controls the first controllable component 21 to be turned on, thereby providing temporary power supply to the system power supply port, so that the microprocessor is again in the power supply state, and is again in the The microprocessor in the power supply state can continuously control the second controllable component 22 to control the first controllable component 21 to continue to conduct continuously, thereby realizing recovery of the system power supply.

Preferably, in order to prevent damage to the power supply BAT caused by voltage back-up, a diode may be connected between the power supply BAT and the controllable power supply circuit 2. Specifically, the controllable power supply circuit 2 may further include: a second diode D3 disposed between the power supply BAT and the first controllable element 21;

The anode of the second diode D3 is connected to the power supply BAT, and the cathode of the second diode D3 is connected to the output of the first controllable element 21.

By connecting a diode between the power supply and the controllable power supply circuit, the voltage can be prevented from being reversed to the power supply, thereby avoiding damage to the power supply and improving reliability.

In addition, in order to ensure the performance and stability of the controllable power supply circuit, a voltage divider resistor can also be provided. Preferably, the controllable power supply circuit 2 may further include: a second resistor R1 and a third resistor R3 disposed between the first controllable element 21 and the second controllable element 22;

One end of the second resistor R1 is connected to the output pole of the first controllable element 21, and the other end of the second resistor R1 is connected to the control pole of the first controllable element 21;

One end of the third resistor R3 is connected to the control electrode of the first controllable element 21, and the other end of the third resistor R3 is connected to the supply electrode of the second controllable element 22.

Specifically, the second resistor R1 and the third resistor R3 are voltage dividing resistors of the first controllable component 21 to ensure reliability and stability of the first controllable component 21.

Further preferably, in order to ensure the performance and stability of the second controllable element 22, the controllable power supply circuit 2 may further comprise: a fourth resistor R6;

One end of the fourth resistor R6 is connected to the control electrode of the second controllable element 22, and the other end of the fourth resistor R6 is grounded.

In practical applications, the first controllable element 21 and the second controllable element 22 can be implemented by various controllable elements, such as voltage control elements, current control elements, and the like.

As shown in FIG. 4A, in one embodiment, the first controllable element 21 can be a PMOS tube, and the second controllable element 22 can be an NMOS tube; wherein the first controllable element 21 and the second controllable element 22 The control is extremely gated, and the power supply of the first controllable element 21 and the second controllable element 22 is extremely drained, and the outputs of the first controllable element 21 and the second controllable element 22 are extremely source.

The first controllable component 21 is a PMOS transistor Q1, and the second controllable component 22 is an NMOS transistor Q2. Correspondingly, the gate of the NMOS transistor Q2 is connected to the microprocessor. The source of the NMOS transistor Q2 is grounded, the drain of the NMOS transistor Q2 is connected to the PMOS transistor Q1, and the gate of the PMOS transistor Q1 is connected to the restart circuit 1 and the drain of the NMOS transistor Q2. The source of the transistor Q1 is connected to the power supply BAT, and the drain of the PMOS transistor Q1 is connected to the input terminal of the system power supply chip U1.

As shown in FIG. 4B, in another embodiment, the first controllable element 21 is a PNP transistor Q3, and the second controllable element 22 is an NPN transistor Q4; the first controllable element 21 and the second controllable element 22 The control is extremely base, and the power supply of the first controllable element 21 and the second controllable element 22 is extremely collector, and the outputs of the first controllable element 21 and the second controllable element 22 are extremely emitters.

Also described in conjunction with the foregoing embodiments, the first controllable element 21 is a PNP transistor Q3, and the second controllable element 22 is an NPN transistor Q4. Accordingly, the base of the NPN transistor Q4 is connected to a microprocessor, the NPN The emitter of the transistor Q4 is grounded, the collector of the NPN transistor Q4 is connected to the PNP transistor Q3; the base of the PNP transistor Q3 is connected to the collector of the restart circuit 1 and the NPN transistor Q4, the PNP transistor The emitter of Q3 is connected to a power supply BAT, and the collector of the PNP transistor Q3 is connected to the input of the system power chip U1.

In the power supply system for reducing power consumption provided by this embodiment, the controllable power supply circuit includes a first controllable component and a second controllable component, and the microprocessor can control the second controllable component to be turned on or off, thereby Controlling the first controllable component to be turned on or off to control the cutoff of the system power supply, thereby effectively reducing power consumption, and using conventional components can effectively save costs.

In addition, the restart circuit 1 in the present solution can be used to supply power to the system power supply port to restore the system power supply in the case of system power failure. Alternatively, the restart circuit 1 can be implemented in various manners.

In one embodiment, the restart circuit 1 can be used to control the first controllable element 21 to be turned on to enable power supply to the system power port. Optionally, FIG. 5A is a schematic structural diagram of a power supply system for reducing power consumption according to Embodiment 4 of the present application. Referring to FIG. 5A, the present embodiment provides a power supply system for reducing power consumption. The power supply system is used to reduce power consumption by controlling the system power supply, and supports power recovery after the system is powered off. Specifically, based on any embodiment, the restart circuit 1 includes: a switching element S1;

One end of the switching element S1 is connected to the control electrode of the first controllable element 21, and the other end of the switching element S1 is grounded for controlling the first controllable element 21 to be turned on when the switching element S1 is closed.

For example, the switching element S1 is an element capable of turning on or off, for example, a key switch or the like. For example, the switching element S1 is a push button switch. Assume that the current microprocessor has controlled the controllable power supply circuit 2 to be disconnected, and the power supply of the entire system is turned off. If it is necessary to restore the system power supply, the push button switch can be pressed to turn it on. After the push button is turned on, there is a voltage difference between the control electrode and the output pole of the first controllable component 21, and when the voltage differential is greater than the turn-on voltage of the first controllable component 21, the first controllable component is 21 conduction. When the first controllable component 21 is turned on, the path between the power supply BAT and the system power supply port is turned on, thereby implementing system power supply, and the microprocessor is also in a power supply state, and then the microprocessor is directed to the second controllable component. 22 sends an On_Off signal to control the second controllable component 22 to be turned on, thereby interlockingly controlling the first controllable component 21 to continue to be turned on, thereby realizing the system to resume power supply. After that, the button switch can be turned off and the system will remain unaffected by the power supply.

In practical applications, in order to facilitate detection of the state of the switching element S1, a port for detecting its state may be provided. Optionally, on the basis of the embodiment shown in FIG. 5A, the power supply system further includes: a first diode D1 and a first resistor R4 disposed between the switching element S1 and the second controllable element 22;

The anode of the first diode D1 is connected to the switch detection port KEY, and the cathode of the first diode D1 is connected to one end of the switching element S1;

One end of the first resistor R4 is connected to the cathode of the first diode D1, and the other end of the first resistor R4 is connected to the supply electrode of the second controllable element 22.

Specifically, the switch detection port KEY can be connected to the microprocessor to obtain the state of the switching element S1 by the microprocessor. The first resistor R4 is used for blocking the direct connection between the switch detection port KEY and the ground to improve the accuracy of the state detection.

In this embodiment, when the system power supply is cut off, the first controllable component is controlled to be turned on by the switching element, thereby realizing temporary system power supply, and the powered microprocessor subsequently controls the controllable power supply circuit to maintain the conduction state to recover. System power supply. The structure of the present embodiment is simple, the power consumption can be further reduced, and the power supply recovery is supported, and the cost can be saved by using conventional components.

In another embodiment, the restart circuit 1 can be used to power the system power supply port directly. Optionally, FIG. 5B is a schematic structural diagram of another power supply system for reducing power consumption according to Embodiment 4 of the present application. Referring to FIG. 5B, the present embodiment provides a power supply system for reducing power consumption. The power supply system is also used to reduce power consumption by controlling the system power supply, and supports power recovery after the system is powered off. Specifically, on the basis of any of the embodiments, the restart circuit 1 includes: a branch connecting the input end of the system power chip U1 and the charging port Charge_in; correspondingly,

The restart circuit 1 is configured to transmit the power supply signal received by the charging port Charge_in to the input end of the system power chip U1 to provide a power supply signal to the system power supply port 3 through the system power chip U1.

An example is given in combination with the actual scenario: assuming that the current microprocessor has controlled the controllable power supply circuit 2 to be disconnected, the power supply of the entire system is in a cut-off state, and if it is necessary to restore the system power supply, the charging signal received by the charging port Charge_in can be obtained by charging. The system power is transmitted through the branch circuit and the system power supply new disk U1 to the system power supply port, and the microprocessor is also in the power supply state, and then the microprocessor sends an On_Off signal to the second controllable component 22 to control The second controllable component 22 is turned on, and then the first controllable component 21 is controlled to continue to be turned on, thereby realizing the system to resume power supply. After that, the charging can be disconnected and the system will remain unaffected by the power supply.

Preferably, in this embodiment, in order to avoid voltage backflow, the restart circuit 1 further includes a third diode D2 connected in series in the branch;

The anode of the third diode D2 is connected to the charging port Charge_in, and the cathode of the third diode D2 is connected to the input end of the system power chip U1.

The charging port Charge_in mentioned in this embodiment is a port capable of receiving a charging signal. Alternatively, it may be a charging port of the electronic device, or may be a port connected to the charging port of the electronic device, that is, When the electronic device is charged, the charging port Charge_in can receive a charging signal to supply power to the system power supply port.

In this embodiment, a branch circuit connecting the charging port and the system power supply port is provided. When the system power supply is cut off, the temporary system power supply is realized by charging, and the power supply microprocessor subsequently controls the controllable power supply circuit to maintain the conduction state. To restore power to the system. The structure of the present embodiment is simple, the power consumption can be further reduced, and the power supply recovery is supported, and the cost can be saved by using conventional components.

It should be noted that the above two embodiments may be implemented separately or in combination. For example, as shown in FIG. 5B, a switching element S1 for controlling the first controllable element Q1 may be provided, or a branch connecting the charging port Charge_in and the system power supply chip U1 may be provided.

The power supply system for reducing power consumption provided by this embodiment is provided with a restart circuit capable of supplying power to the system power supply port when the system is powered off, so that the microprocessor to the power supply further controls the controllable power supply circuit to maintain conduction. Therefore, the system power supply is truly restored, and all the components used in the embodiment are conventional components, and the structure is simple and convenient to implement, and the cost can be effectively saved.

In order to better understand the solution, an example is illustrated in conjunction with FIG. 5B: as shown, BAT is a power supply, U1 is a system power chip that supplies a power supply signal to the system, and the first controllable component 21 is a PMOS transistor Q1, The second controllable component 22 is exemplified for the NMOS transistor Q2: the PMOS transistor Q1 is a main loop switch MOS between the power supply BAT and the system power supply chip U1, wherein the KEY is a switch detection port connected to a microprocessor (not shown). On_Off indicates the control signal sent by the microprocessor to the NMOS transistor Q2. Charge_In indicates the charging port, C1 and C2 are the input and output filter capacitors of the system power chip U1, and R2 and R5 are the voltage dividing resistors of the system power chip U1. Q2 is used to control the turn-on or turn-off of Q1, R1 and R3 are the voltage dividing resistors of Q1, R4 is the isolation resistor of the blocking switch detection port and ground, and D1, D2 and D3 are diodes for preventing voltage back-up.

When the system is powered normally, On_Off is high level, Q2 is turned on and Q1 is turned on, and the voltage of the power supply is supplied to U1 through D3. At this time, the system power supply is normal and the microprocessor works normally. When the switching element is closed, the microprocessor can detect the change in the KEY port level and respond accordingly (such as displaying the power, etc.).

When the system needs to enter the low power state, the microprocessor controls On_Off to be low, and then Q2 and Q1 are turned off, the system power is cut off, and the microprocessor can no longer work because it is powered down. At this time, the port of the microprocessor for transmitting the control signal On_Off is in a floating state, and the gate of Q2 is at a low level due to the presence of R6, so that Q2 and Q1 are continuously turned off, and the system is powered off to enter an ultra-low power state.

In the ultra-low power state, when the system needs to restore the power supply, the switching element S1 can be closed, and the R4 end is turned on to the ground after the switching element S1 is closed, so that the voltage difference between the gate voltage of Q1 and Q1 is greater than Q1. The turn-on voltage, Q1 turns on, and then the system is powered. The microprocessor turns on Q2 and Q1 even if On_Off is high, so the system switches from ultra-low power state to resume power supply. Another method is to charge through the charging port. When charging, the voltage on the Charge_In port is turned on to the U1 to make the system power supply through the D2, and the microprocessor continues to make the On_Off port high, and then the voltage of the power supply is also It will conduct power to the power chip, and the system can also switch from ultra low power state to resume power supply.

In practical applications, some power supply (for example, battery) will have other circuits such as fuel gauges. Before the microprocessor control system is powered down, the fuel gauge can be put into sleep mode and the peripheral circuit can be turned off in advance to further reduce the device. Power consumption.

Embodiment 5 of the present application provides an electronic device, including: a microprocessor, and a power supply system for reducing power consumption according to any of the foregoing embodiments;

The control end of the controllable power supply circuit in the power supply system is coupled to the microprocessor.

Optionally, the electronic device can be a drone.

In the electronic device provided in this embodiment, the power supply system for reducing power consumption includes a restart circuit and a controllable power supply circuit connected between the battery and the system power supply port, and the controllable power supply circuit can be under the control of the microprocessor Turn off or turn on. When the system is powered normally, the microprocessor controls the controllable power supply circuit to be continuously turned on to enable the battery to supply power to the entire device system. In order to reduce power consumption when the system is not required to operate, the microprocessor controls the controllable power supply circuit to be turned off, thereby cutting off the power supply of the entire system, including powering the microprocessor. When it is necessary to restore the system power supply, based on the restart circuit, the microprocessor is first powered by the system power supply port. When the microprocessor is powered, the controllable power supply circuit can be controlled to be turned on, thereby finally realizing the system to restore power. Based on the solution, the flexible control of the entire system power can be realized, thereby effectively reducing the power consumption of the device, and the circuit of the solution is simple, and some conventional components are used, which can effectively save costs.

Claims (15)

1. A power supply system for reducing power consumption, comprising: a restart circuit and a controllable power supply circuit;

   One end of the controllable power supply circuit is connected to a power supply, and the other end of the controllable power supply circuit is connected to a system power supply port, and the control end of the controllable power supply circuit is connected to the microprocessor; The system power supply port is connected, and the system power supply port is connected to the microprocessor;

   The controllable power supply circuit is configured to be turned off or turned on under the control of the microprocessor to cut off or provide power to the system;

   The restarting circuit is configured to resume power supply to the microprocessor by providing a power supply signal to the system power supply port after the system power supply is cut off, so that the microprocessor controls the power after restoring power supply The controllable power supply circuit is turned on.
2. The power supply system according to claim 1, wherein the power supply system further comprises: a system power chip disposed between the controllable power supply circuit and the system power supply port;

   An input end of the system power chip is connected to the controllable power supply circuit, and an output end of the system power chip is connected to the system power supply port.
3. The power supply system according to claim 2, wherein said controllable power supply circuit comprises: a first controllable element and a second controllable element;

   a control pole of the second controllable element is coupled to the microprocessor, an output pole of the second controllable element is grounded, and a supply electrode of the second controllable element is coupled to the first controllable element For turning off or conducting under the control of the microprocessor when system power is supplied;

   a control electrode of the first controllable element is connected to a supply electrode of the restart circuit and the second controllable element, and an output pole of the first controllable element is connected to the power supply, the first a supply electrode of the control element is coupled to an input of the system power chip for turning off or conducting under linkage of the second controllable element when system power is supplied, and also for restarting Conducted under the control of the circuit.
4. The power supply system according to claim 3, wherein said restart circuit comprises: a switching element;

   One end of the switching element is connected to a control pole of the first controllable element, and the other end of the switching element is grounded for controlling the first controllable element to be turned on when the switching element is closed.
5. The power supply system according to claim 4, wherein the power supply system further comprises: a first diode and the first resistor disposed between the switching element and the second controllable element;

   The anode of the first diode is connected to the switch detection port, and the cathode of the first diode is connected to one end of the switching element;

   One end of the first resistor is connected to a cathode of the first diode, and the other end of the first resistor is connected to a supply electrode of the second controllable element.
6. The power supply system according to claim 3, wherein the controllable power supply circuit further comprises: a second diode disposed between the power supply and the first controllable element;

   The anode of the second diode is connected to the power supply, and the cathode of the second diode is connected to the output of the first controllable element.
7. The power supply system according to claim 3, wherein said controllable power supply circuit further comprises: a second resistor and a third resistor disposed between said first controllable element and said second controllable element ;

   One end of the second resistor is connected to an output pole of the first controllable element, and the other end of the second resistor is connected to a control pole of the first controllable element;

   One end of the third resistor is connected to a control electrode of the first controllable element, and the other end of the third resistor is connected to a supply electrode of the second controllable element.
8. The power supply system according to claim 3, wherein the controllable power supply circuit further comprises: a fourth resistor;

   One end of the fourth resistor is connected to the control electrode of the second controllable element, and the other end of the fourth resistor is grounded.
9. The system of claim 3 wherein said first controllable element is a PMOS transistor and said second controllable component is an NMOS transistor; said first controllable component and said second controllable component The control is extremely gated, the power supply of the first controllable element and the second controllable element is extremely drained, and the outputs of the first controllable element and the second controllable element are extremely source; or

   The first controllable component is a PNP transistor, and the second controllable component is an NPN transistor; the first controllable component and the second controllable component are controlled to be a base, the first controllable component The power supply to the second controllable element is extremely collector, and the outputs of the first controllable element and the second controllable element are extremely emitters.
10. The power supply system according to claim 2, wherein said restart circuit comprises a branch connecting an input terminal of said system power chip and a charging port;

    The restart circuit is configured to transmit a power supply signal received by the charging port to an input end of the system power chip to provide a power supply signal to the system power supply port through the system power chip.
11. The power supply system according to claim 10, wherein said restart circuit further comprises a third diode connected in series in said branch;

    The anode of the third diode is connected to the charging port, and the cathode of the third diode is connected to the input end of the system power chip.
12. The power supply system according to any one of claims 2-11, wherein the power supply system further comprises: an input filter capacitor and/or an output filter capacitor;

    One end of the input filter capacitor is connected to an input end of the system power chip, and the other end of the input filter capacitor is grounded;

    One end of the output filter capacitor is connected to an output end of the system power chip, and the other end of the output filter capacitor is grounded.
13. The power supply system according to any one of claims 2 to 11, wherein the power supply system further comprises: a fifth resistor and a sixth resistor;

    One end of the fifth resistor is connected to an input end of the system power chip, and the other end of the fifth resistor is connected to one end of the sixth resistor and an enable end of the system power chip;

    The other end of the sixth resistor is grounded.
14. An electronic device, comprising: a microprocessor, and a power supply system for reducing power consumption according to any one of claims 1-13;

    The control end of the controllable power supply circuit in the power supply system is coupled to the microprocessor.
15. The electronic device of claim 14, wherein the electronic device is a drone.

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