Battery power supply control circuit, board card and electronic equipment

Abstract

The embodiment of the invention discloses a battery power supply control circuit, a board card and electronic equipment. According to the technical scheme provided by the embodiment of the invention, the power supply connection module controls the on-off of the power supply line through which the power supply supplies power to the power supply management module, and when the power supply button module detects the power supply button operation, the power-on signal is sent to the power supply enabling module; the power supply enabling module can respond to the starting-up signal to send an enabling signal to the power supply connecting module so as to enable the power supply connecting module to be communicated with a power supply circuit through which the power supply supplies power to the power supply management module, and the power supply maintaining module sends an enabling signal to the power supply connecting module when receiving a power supply maintaining signal sent by the power supply management module so as to enable the power supply connecting module to be communicated. When the electronic equipment is powered off, the power supply connection module disconnects the power supply line of the power supply for supplying power to the power supply management module, so that the electric leakage of the power supply at the power supply management module under the condition of power failure and shutdown can be reduced, and the shutdown power consumption of the electronic equipment is reduced.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to a battery-powered control circuit, board, and electronic equipment. Background Technology

[0002] With the development of electronic device technology, the functions of electronic devices are becoming increasingly rich, and their use is becoming more and more widespread. Consequently, the requirements for the stability of power supply to electronic devices are also increasing. Electronic devices generally have a built-in rechargeable power supply. The power management chip in the electronic device is connected to this power supply to manage the power supply and ensure a continuous power supply to the device.

[0003] When electronic devices are not in use, they are usually turned off. Because the power supply continues to power the power management chip even when the device is off, there is a risk of power leakage, resulting in higher power consumption when the device is powered off. Summary of the Invention

[0004] This application provides a battery power supply control circuit, board, and electronic device to solve the technical problem in the related art where electronic devices experience power leakage when powered off, resulting in high power consumption during shutdown. This can effectively reduce the high power consumption of electronic devices during shutdown.

[0005] In a first aspect, embodiments of this application provide a battery-powered control circuit, including a power button module, a power enable module, a power sustaining module, and a power connection module. The power button module and the power connection module are both connected to the power enable module, and the power sustaining module is connected to the power connection module. The power button module is used to connect the power supply pins of a power management module and the power enable module. The power sustaining module is used to connect to the power management module. The power connection module is used to connect to the power management module and to connect to an external power supply.

[0006] The power button module is used to send a power-on signal to the power enable module when a power button operation is detected.

[0007] The power supply enable module is used to send an enable signal to the power supply connection module when the power-on signal is received;

[0008] The power supply maintenance module is used to send an enable signal to the power supply connection module when it receives a power supply maintenance signal from the power management module.

[0009] The power supply connection module is used to connect the power supply line from the power supply power source to the power management module when an enable signal is received.

[0010] In this embodiment, the power supply connection module controls the connection and disconnection of the power supply line from the power supply power source to the power management module. When the power button module detects a power button operation, it sends a power-on signal to the power enable module. The power enable module responds to the power-on signal and sends an enable signal to the power supply connection module, thereby connecting the power supply line from the power supply power source to the power management module. When the power supply maintenance module receives the power maintenance signal from the power management module, it sends an enable signal to the power supply connection module, allowing the electronic device to power on and be used normally. When the electronic device is powered off, the power supply connection module disconnects the power supply line from the power supply power source to the power management module, which reduces leakage current at the power management module during power outages and lowers the power consumption of the electronic device during shutdown.

[0011] Furthermore, the power button module includes a power button, the first connection terminal of which is used to connect to the power supply pin of the power management module, the first connection terminal of which is also connected to the power supply enable module, and the second connection terminal of which is grounded.

[0012] The above describes how the power button is used to operate the power button. When the power is triggered, a power-on signal is sent to the power enable module to ensure that the electronic device can be powered on and used normally.

[0013] Furthermore, the power supply enabling module includes a first switching element, the control terminal of the first switching element is connected to the power button module, the first connection terminal of the first switching element is used to connect to an external power supply, and the second connection terminal of the first switching element is connected to the power supply connection module.

[0014] As described above, the first switching element enables a fast and accurate response to the power-on signal, promptly connecting the power supply line from the power supply power source to the power management module, thus ensuring the normal power-on of the electronic equipment.

[0015] Furthermore, the power supply enabling module also includes a first resistor, a second resistor, a third resistor, and a first capacitor. The first connection terminal of the first switching element is connected to the power supply via the first resistor. The first connection terminal of the second resistor is connected to the first connection terminal of the first switching element. The second connection terminal of the second resistor is connected to the control terminal of the first switching element. The first connection terminal of the first capacitor is connected to the first connection terminal of the first switching element. The second connection terminal of the first capacitor is connected to the control terminal of the first switching element. The control terminal of the first switching element is connected to the power supply via the third resistor.

[0016] As described above, when the user presses the power button module, the power supply undergoes voltage division through the first resistor, the second resistor, the third resistor, and the first capacitor. The control terminal potential of the first switching element changes and becomes conductive, connecting the power supply line from the power supply to the power management module. By pulling up the voltage supplied to the power connection module by the power supply, an enable signal is sent to the power connection module, promptly connecting the power supply line from the power supply to the power management module and ensuring the normal power-on of the electronic device.

[0017] Furthermore, the power supply maintenance module includes a first diode, the anode of which is connected to the first input / output pin of the power management module, and the cathode of which is connected to the power supply connection module.

[0018] The power management module is used to send a power supply maintenance signal through the first input / output pin when the power supply is stable.

[0019] As described above, the first diode ensures the unidirectional transmission of the power supply maintenance signal to the power supply connection module, thereby ensuring the normal operation of the power management module.

[0020] Furthermore, the power supply connection module includes a second switching element and a third switching element, wherein:

[0021] The control terminal of the second switching element is connected to the power supply enable module, the first connection terminal of the second switching element is connected to the control terminal of the third switching element, the second connection terminal of the second switching element is grounded, and the first and second connection terminals of the second switching element are turned on when the control terminal receives the enable signal sent by the power supply enable module.

[0022] The first connection terminal of the third switching element is connected to the power supply, and the second connection terminal of the third switching element is connected to the power management module. The first and second connection terminals of the third switching element are turned on when the control terminal potential is lower than a preset potential threshold.

[0023] As described above, the second and third switching elements respond to the enable signal to turn on the power supply line from the power supply to the power management module, ensuring the normal operation of the electronic device. When the electronic device is turned off, the power supply line from the power supply to the power management module is accurately controlled to disconnect, effectively reducing leakage current at the power management module when the power supply is turned off, and reducing the power consumption of the electronic device during shutdown.

[0024] Furthermore, the power supply connection module also includes a second capacitor, a third capacitor, a fourth capacitor, a seventh resistor, and an eighth resistor, wherein:

[0025] The first connection terminal of the second capacitor is connected to the first connection terminal of the third switching element, and the second connection terminal of the second capacitor is grounded. The first connection terminal of the third capacitor is connected to the first connection terminal of the third switching element, and the second connection terminal of the third capacitor is grounded. The first connection terminal of the fourth capacitor is connected to the first connection terminal of the third switching element, and the second connection terminal of the fourth capacitor is connected to the control terminal of the third switching element.

[0026] The first connection terminal of the seventh resistor is connected to the first connection terminal of the third switching element, the second connection terminal of the seventh resistor is connected to the first connection terminal of the second switching element, the first connection terminal of the eighth resistor is connected to the first connection terminal of the second switching element, and the second connection terminal of the eighth resistor is connected to the control terminal of the third switching element.

[0027] As described above, the second and third capacitors are used to stabilize and filter the power supply, thereby improving the power quality. Furthermore, the cooperation of the fourth capacitor, the seventh resistor, and the eighth resistor can accurately drive the third switching element and accurately control its on / off state.

[0028] Furthermore, the power supply connection module includes a voltage conversion submodule, the enable terminal of the voltage conversion submodule is connected to the power supply enable module, the first connection terminal of the voltage conversion submodule is connected to the power supply, and the second connection terminal of the voltage conversion submodule is connected to the power management module.

[0029] As described above, the voltage conversion submodule responds to the enable signal to turn on the power supply line from the power supply to the power management module, ensuring the normal operation of the electronic equipment. When the electronic equipment is turned off, the power supply line from the power supply to the power management module is accurately controlled to disconnect, effectively reducing leakage current at the power management module when the power supply is turned off, and reducing the power consumption of the electronic equipment during shutdown.

[0030] Furthermore, it also includes an external sustainment module, the output of which is connected to the power supply connection module, and the input of which is connected to the second input / output pin of the power management module, wherein:

[0031] The external maintenance module is used to send an enable signal to the power connection module when it receives an external power supply signal from the power management module.

[0032] When an external power source is connected, the power management module sends an external power supply signal to the external maintenance module through the second input / output pin.

[0033] As described above, the external maintenance module maintains the connection of the power supply line from the power supply to the power management module when an external power source is connected, ensuring normal power supply to the electronic equipment.

[0034] Furthermore, the external sustaining module includes a second diode, the anode of which is connected to the power management module, and the cathode of which is connected to the power supply connection module.

[0035] As mentioned above, the second diode ensures unidirectional transmission of the power supply maintenance signal to the power supply connection module, thus guaranteeing the normal operation of the power management module.

[0036] Furthermore, the power supply includes a series battery power supply and / or a parallel battery power supply.

[0037] As mentioned above, a suitable power supply can be selected according to the power supply needs of electronic devices to ensure the power supply effect of electronic devices.

[0038] In a second aspect, embodiments of this application provide a board including a battery-powered control circuit as described in any of the first aspects.

[0039] In this embodiment, the power supply connection module controls the connection and disconnection of the power supply line from the power supply power source to the power management module. When the power button module detects a power button operation, it sends a power-on signal to the power enable module. The power enable module responds to the power-on signal and sends an enable signal to the power supply connection module, thereby connecting the power supply line from the power supply power source to the power management module. When the power supply maintenance module receives the power maintenance signal from the power management module, it sends an enable signal to the power supply connection module, allowing the electronic device to power on and be used normally. When the electronic device is powered off, the power supply connection module disconnects the power supply line from the power supply power source to the power management module, which reduces leakage current at the power management module during power outages and lowers the power consumption of the electronic device during shutdown.

[0040] In a third aspect, embodiments of this application provide an electronic device, including a battery-powered control circuit as described in any of the first aspects or a board as described in the second aspect.

[0041] In this embodiment, the power supply connection module controls the connection and disconnection of the power supply line from the power supply power source to the power management module. When the power button module detects a power button operation, it sends a power-on signal to the power enable module. The power enable module responds to the power-on signal and sends an enable signal to the power supply connection module, thereby connecting the power supply line from the power supply power source to the power management module. When the power supply maintenance module receives the power maintenance signal from the power management module, it sends an enable signal to the power supply connection module, allowing the electronic device to power on and be used normally. When the electronic device is powered off, the power supply connection module disconnects the power supply line from the power supply power source to the power management module, which reduces leakage current at the power management module during power outages and lowers the power consumption of the electronic device during shutdown. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of a battery power supply control principle based on parallel batteries in the prior art;

[0043] Figure 2 This is a schematic diagram of a battery power supply control principle based on series batteries in the prior art;

[0044] Figure 3 This is a schematic diagram of a battery power supply control circuit provided in an embodiment of this application;

[0045] Figure 4 This is a schematic diagram of another battery power supply control circuit provided in an embodiment of this application;

[0046] Figure 5 This is a circuit diagram of a battery power supply control circuit provided in an embodiment of this application;

[0047] Figure 6 This is a circuit diagram of a battery power supply control circuit based on parallel batteries provided in an embodiment of this application;

[0048] Figure 7 This is a circuit diagram of a battery power supply control circuit based on a series battery provided in an embodiment of this application;

[0049] Figure 8 This is a schematic block diagram of a board provided in an embodiment of this application;

[0050] Figure 9 This is a schematic block diagram of an electronic device provided in an embodiment of this application.

[0051] Reference numerals: 1. Power button module; 11. Power button; 2. Power enable module; 21. First switching element; 22. First resistor; 23. Second resistor; 24. Third resistor; 25. First capacitor; 3. Power supply maintenance module; 31. First diode; 4. Power supply connection module; 41. Second switching element; 42. Third switching element; 43. Voltage conversion submodule; 44. Second capacitor; 45. Third capacitor; 46. Fourth capacitor; 47. Seventh resistor; 48. Eighth resistor; 5. External maintenance module; 51. Second diode; 6. Power supply; 7. Power management module. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this application clearer, specific embodiments of this application will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this application and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not all of them.

[0053] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0054] In existing power supply solutions for electronic devices, the power supply is typically directly connected to the power management chip. Both parallel and series battery power supply control suffer from leakage current when the electronic device is not in operation, resulting in excessively high power consumption during shutdown and failing to provide a long-term shutdown lifespan. This is because charging the power supply when the cell voltage is below 2V poses a safety risk of damaging the battery's internal structure. Currently, electronic products rely on disabling the 0V charging restriction function to compensate for the inability to power on the device after prolonged shutdown. However, when the 0V charging restriction function is enabled, the electronic device will be completely disabled for safety protection when the cell voltage is below 2V. In this case, the device relies on reduced power consumption during shutdown to extend its shutdown lifespan. Simultaneously, because the power management chip (PMIC) is connected to the battery, it continuously leaks current, causing the power supply to continue consuming power even when the device is not powered on, resulting in high power consumption during shutdown.

[0055] like Figure 1A schematic diagram of a prior art battery power supply control principle based on parallel batteries is provided. The parallel battery pack is directly connected to the power management module to supply power to the power management module. When the electronic device is powered off, the power supply continues to supply power to the power management module. When it is necessary to power on the electronic device, the power-on operation is performed by pressing the power button module connected to the power management module. At this time, the power management module can control the power supply to various components in the electronic device. Figure 2 A schematic diagram of a prior art battery power supply control principle based on series batteries is provided. The series battery pack is connected to the power management module via a voltage conversion module (e.g., a DC-DC step-down chip). The series battery pack continuously provides an enable signal to the enable terminal of the voltage conversion module through a voltage divider formed by resistors R21 and R22, keeping the voltage conversion module on. The voltage conversion module continuously converts the voltage of the series battery pack and supplies power to the power management module. When the electronic device is powered off, the power supply continues to power the voltage conversion module and the power management module. Similarly, when the electronic device needs to be powered on, the power button module connected to the power management module is pressed to perform the power-on operation. At this time, the power management module can control the power supply to various components in the electronic device. It is evident that regardless of whether the battery power supply control is based on parallel or series batteries, the power supply continues to power the power management chip during shutdown. This leads to power leakage when the electronic device is powered off, resulting in a high power consumption issue during shutdown.

[0056] Based on this, this application provides a battery power supply control circuit, board, and electronic device to solve the technical problem that existing electronic devices experience power leakage when powered off, resulting in high power consumption when powered off.

[0057] Figure 3 A schematic diagram of a battery power supply control circuit according to an embodiment of this application is provided. (Reference) Figure 3 The battery power supply control circuit includes a power button module 1, a power enable module 2, a power sustaining module 3, and a power connection module 4. The power button module 1 and the power connection module 4 are both connected to the power enable module 2, and the power sustaining module 3 is connected to the power connection module 4.

[0058] Optionally, the power supply 6 provided in this solution can be a series battery power supply and / or a parallel battery power supply. The appropriate power supply 6 can be selected according to the power supply needs of electronic devices (such as mobile phones, tablets, etc.) to ensure the power supply effect of electronic devices.

[0059] The power button module 1 provided in this solution can be used to connect to the power management module 7 (e.g., to the power supply pin (VSYS pin) of the management chip in the power management module 7) and the power enable module 2 (e.g., the input terminal of the power enable module 2). The power button module 1 can also be used to send a power-on signal to the power enable module 2 when a power button operation is detected. Optionally, the power button module 1 provided in this solution may include a self-resetting power button. One end of the power button can be connected to the power button pin (PWRKEY pin) of the power management module 7 and the power enable module 2, and the other end is grounded. When the power button is pressed, the power button pin of the power management module 7 is grounded, and the power management module 7 and the power enable module 2 can detect the power-on signal corresponding to the power button operation.

[0060] Furthermore, the power enable module 2 provided in this solution can be used to send an enable signal to the power connection module 4 when a power-on signal is received. For example, the input terminal of the power enable module 2 is connected to the power button module 1, and the output terminal of the power enable module 2 is connected to the power connection module 4. When the power enable module 2 receives the power-on signal provided by the power button module 1 at its input terminal, it sends an enable signal to the power connection module 4 through its output terminal.

[0061] The power supply sustaining module 3 provided in this solution can be used to connect to the power management module 7 (for example, the input terminal of the power supply sustaining module 3 is connected to the first input / output pin of the power management module 7 (an input / output pin of the power management module 7, such as the VIO28_PMU pin in the figure)). When the power supply sustaining module 3 receives the power supply sustaining signal from the power management module 7, it sends an enable signal to the power connection module 4 through its output terminal connected to the power connection module 4. For example, after the power management module 7 is successfully powered on (for example, the power supply 6 successfully and stably supplies power to the power management module 7), the power management module 7 outputs a power supply sustaining signal through its first input / output pin (such as the VIO28_PMU pin in the figure).

[0062] The power supply connection module 4 provided in this solution can be used to connect an external power supply 6 and a power management module 7. Upon receiving an enable signal (including the enable signal provided by the power supply enable module 2 and the enable signal provided by the power supply maintenance module 3), it connects the power supply line from the power supply 6 to the power management module 7. For example, the power input terminal of the power supply connection module 4 is connected to the power supply 6, the power output terminal of the power supply connection module 4 is connected to the power supply terminal of the power management module 7, the control terminal of the power supply connection module 4 is connected to the output terminal of the power supply enable module 2, and the control terminal of the power supply connection module 4 is also connected to the output terminal of the power supply maintenance module 3.

[0063] When the connected electronic device is in a powered-off state, the power supply connection module 4 does not receive an enable signal, the power supply line from the power supply 6 to the power management module 7 is cut off, and the power supply connection module 4 stops the power supply from the power supply 6 to the power management module 7. At this time, there is no leakage current at the power management module 7, which can effectively reduce the high power consumption of the electronic device when it is powered off.

[0064] When the electronic device needs to be turned on, the user can trigger the power button operation through the power button module 1. The power enable module 2 receives the power button operation power-on signal and sends an enable signal to the power connection module 4. When the power connection module 4 receives the enable signal, it connects the power supply line from the power supply 6 to the power management module 7. While the user is pressing the power button module 1, the power supply 6 continuously supplies power to the power management module 7, allowing the power management module 7 to power on normally. After the power management module 7 is normally turned on, it continuously sends a power maintenance signal to the power maintenance module 3, so that the power maintenance module 3 continuously sends an enable signal to the power connection module 4. The power connection module 4 will maintain the connection of the power supply line from the power supply 6 to the power management module 7, ensuring normal power supply from the power supply 6 to the power management module 7 even if the user stops pressing the power button module 1.

[0065] As described above, the power supply connection module 4 controls the connection and disconnection of the power supply line from the power supply 6 to the power management module 7. When the power button module 1 detects a power button operation, it sends a power-on signal to the power enable module 2. The power enable module 2 responds to the power-on signal and sends an enable signal to the power supply connection module 4, so that the power supply connection module 4 connects the power supply line from the power supply 6 to the power management module 7. When the power supply maintenance module 3 receives the power maintenance signal from the power management module 7, it sends an enable signal to the power supply connection module 4, so that the electronic device can be powered on and used normally. When the electronic device is powered off, the power supply connection module 4 disconnects the power supply line from the power supply 6 to the power management module 7, which can reduce the leakage current of the power supply 6 at the power management module 7 when the power is off, and reduce the power consumption of the electronic device when it is powered off.

[0066] Based on the above embodiments, Figure 4 A schematic diagram of another battery power supply control circuit provided in an embodiment of this application is given. For example... Figure 4 As shown, the battery power supply control circuit provided in this application embodiment also includes an external maintenance module 5, which is connected to the power supply connection module 4.

[0067] The external sustainment module 5 provided in this solution is used to connect to the power management module 7 (CHRLDO pin of the power management module 7). When an external power supply is connected, the power management module 7 sends an external power supply signal to the external sustainment module 5. In one embodiment, the power management module 7 sends an external power supply signal to the external sustainment module 5 when an external power supply is connected. Optionally, the external power supply signal can be provided by the power management module 7 or by the external power supply itself (for example, the input terminal of the external sustainment module 5 is connected to an external power supply interface, and the external power supply is connected to the external sustainment module 5 simultaneously with the external power supply interface being connected).

[0068] In one embodiment, the external sustaining module 5 can also be used to send an enable signal to the power supply connection module 4 when it receives an external power supply signal (the power management module 7 or the external power supply signal issued by the external power source), so that the power supply connection module 4 connects the power supply line from the power supply 6 to the power management module 7.

[0069] For example, when an external power source (e.g., an adapter) is connected to an electronic device, the external power source supplies power to the power management module 7. The power management module 7 continuously sends a power sustaining signal to the power sustaining module 3, causing the power sustaining module 3 to continuously send an enable signal to the power connection module 4. The power connection module 4 maintains the connection of the power supply line from the power supply 6 to the power management module 7, and can also charge the power supply 6 normally. Even if the external power source is subsequently disconnected, the power supply 6 can still supply power normally, and the electronic device will not lose power due to the disconnection of the external power source; the electronic device can operate normally.

[0070] As described above, the power supply connection module 4 controls the connection and disconnection of the power supply line from the power supply 6 to the power management module 7. When the power button module 1 detects a power button operation, it sends a power-on signal to the power enable module 2. The power enable module 2 responds to the power-on signal by sending an enable signal to the power supply connection module 4, thus connecting the power supply line from the power supply 6 to the power management module 7. Furthermore, when the power supply maintenance module 3 receives the power maintenance signal from the power management module 7, it sends an enable signal to the power supply connection module 4, allowing the electronic device to power on and function normally. When the electronic device is powered off, the power supply connection module 4 disconnects the power supply line from the power supply 6 to the power management module 7, reducing leakage current at the power management module 7 during power outages and lowering the power consumption of the electronic device during shutdown. Simultaneously, the external maintenance module 5 maintains the connection of the power supply line from the power supply 6 to the power management module 7 when an external power source is connected, ensuring normal power supply to the electronic device.

[0071] Based on the above embodiments, Figure 5A circuit diagram of a battery power supply control circuit according to an embodiment of this application is provided. Figure 5 As shown, the power enable module 2 provided in this application embodiment includes a first switching element 21 (Q1 in the figure), the control terminal of the first switching element 21 is connected to the power button module 1, the first connection terminal of the first switching element 21 is used to connect to an external power supply 6, and the second connection terminal of the first switching element 21 is connected to the power supply connection module 4.

[0072] Optionally, the switching elements provided in this solution (including the first switching element 21, the second switching element 41, and the third switching element 42) can be transistors (e.g., NPN transistors, PNP transistors, etc.) or MOSFETs (e.g., NMOS transistors, PMOS transistors, etc.). When the switching element is a transistor, the base, collector, and emitter of the transistor can serve as the control terminal, the first connection terminal, and the second connection terminal of the switching element. When the switching element is a MOSFET, the gate, drain, and source of the MOSFET can serve as the control terminal, the first connection terminal, and the second connection terminal of the switching element.

[0073] In one embodiment, the power enable module further includes a first resistor 22 (R1 in the figure), a second resistor 23 (R2 in the figure), a third resistor 24 (R3 in the figure), and a first capacitor 25 (C1 in the figure). The first connection terminal of the first switching element is connected to the power supply via the first resistor 22; the first connection terminal of the second resistor 23 is connected to the first connection terminal of the first switching element; the second connection terminal of the second resistor 23 is connected to the control terminal of the first switching element; the first connection terminal of the first capacitor 25 is connected to the first connection terminal of the first switching element; the second connection terminal of the first capacitor 25 is connected to the control terminal of the first switching element; and the control terminal of the first switching element is connected to the power supply via the third resistor 24. When the user presses the power button module 1, the power supply 6 undergoes voltage division by the first resistor 22, the second resistor 23, the third resistor 24, and the first capacitor 25. The control terminal potential of the first switching element 21 changes and becomes conductive, connecting the power supply line from the power supply 6 to the power management module 7. The power supply 6 pulls up the voltage supplied to the power connection module 4, thereby sending an enable signal to the power connection module 4, promptly connecting the power supply line from the power supply 6 to the power management module, and ensuring the normal power-on of the electronic device.

[0074] This solution uses a PMOS transistor as the first switching element 21 as an example for description. Figure 4As shown, the first connection terminal of the first switching element 21 is connected to the power supply 6 (VBAT) via the first resistor 22. The gate of the first switching element 21 is connected to the power button module 1 via the third resistor 24. The first connection terminal of the second resistor 23 is connected to the drain of the first switching element 21, and the second connection terminal of the second resistor 23 is connected to the gate of the first switching element 21. The first connection terminal of the first capacitor 25 is connected to the drain of the first switching element 21, and the second connection terminal of the first capacitor 25 is connected to the gate of the first switching element 21. The source of the first switching element 21 is connected to the power supply connection module 4, and the source of the first switching element 21 is also grounded via resistor R6. When the user presses the power button module 1, the gate potential of the first switching element 21 is pulled low after voltage division by the first resistor 22, the second resistor 23, the third resistor 24, and the first capacitor 25. The gate of the first switching element 21 receives the power-on signal, and the drain and source of the first switching element 21 conduct. This pulls up the voltage supplied to the power supply connection module 4 by the power supply 6, sending a high-level enable signal to the power supply connection module 4, thereby connecting the power supply line from the power supply 6 to the power management module 7. This solution achieves a fast and accurate response to the power-on signal through the first switching element 21, promptly connecting the power supply line from the power supply 6 to the power management module 7, ensuring the normal power-on of the electronic device.

[0075] In one possible embodiment, the power supply maintenance module 3 provided by this solution includes a first diode 31 (D2 in the figure). The anode of the first diode 31 is connected to the first input / output pin of the power management module 7 (for example, the 28th input / output pin of the power management module 7 is used as the first input / output pin, and the anode of the first diode 31 is connected to the VIO28_PMU pin of the power management module 7 through resistor R5). The cathode of the first diode 31 is connected to the power supply connection module 4. The power management module 6 can be used to issue a power supply maintenance signal through the first input / output pin when the power supply is stable. For example, after the power supply 6 successfully supplies stable power to the power management module 7, the power management module 7 outputs a high-level power supply maintenance signal through the VIO28_PMU pin. The first diode 31 receives the power supply maintenance signal and sends a high-level enable signal to the power supply connection module 4. The power supply connection module 4 maintains the connection of the power supply line from the power supply 6 to the power management module 7 based on the high-level power supply maintenance signal. The first diode 31 can effectively ensure the unidirectional transmission of the power supply maintenance signal to the power supply connection module 4, ensuring the normal operation of the power management module 7.

[0076] In one embodiment, the power button module 1 provided by this solution includes a power button 11. The first connection terminal of the power button 11 is used to connect to the power supply pin (VSYS pin) of the power management module 7. The first connection terminal of the power button 11 is also connected to the power enable module 2, and the second connection terminal of the power button 11 is grounded. The power button 11 enables power button operation, and sends a power-on signal to the power enable module 2 at the same time as triggering the power-on, ensuring that the electronic device can be powered on and used normally.

[0077] In one possible embodiment, the battery power supply control circuit provided by this solution further includes an external sustainment module 5. The output terminal of the external sustainment module 5 is connected to the power supply connection module 4, and the input terminal of the external sustainment module 5 is used to connect to the second input / output pin of the power management module 7. The external sustainment module 5 is also used to send an enable signal to the power supply connection module 4 when it receives an external power supply signal from the power management module 7. When an external power supply is connected, the power management module 7 sends an external power supply signal to the external sustainment module 5 through its second input / output pin.

[0078] In one embodiment, the external sustaining module 5 provided by this solution includes a second diode 51 (D1 in the figure). The anode of the second diode 51 is connected to the second input / output pin of the power management module 7 (for example, the CHRLDO pin of the power management module 7 is connected as the second input / output pin, and the anode of the second diode 51 is connected to the CHRLDO pin of the power management module 7 via resistor R4). The cathode of the second diode 51 is connected to the power supply connection module 4. Optionally, the CHRLDO pin of the power management module 7 can be connected to an external power supply interface. When an external power supply is connected to the external power supply interface, the potential of the CHRLDO pin of the power management module 7 is raised.

[0079] When an external power supply is connected to the external power interface, the anode potential of the second diode 51 increases. The second diode 51 receives the external power supply signal and sends a high-level enable signal to the power supply connection module 4. The power supply connection module 4 maintains the connection of the power supply line from the power supply 6 to the power management module 7 based on the high-level power supply maintenance signal. In addition, the second diode 51 can effectively ensure the unidirectional transmission of the power supply maintenance signal to the power supply connection module 4, ensuring the normal operation of the power management module 7.

[0080] In one embodiment, after the external power supply successfully and stably supplies power to the power management module 7, the power management module 7 outputs a high-level power supply sustaining signal through the VIO28_PMU pin, and the first diode 31 sends a high-level enable signal to the power supply connection module 4. The power supply connection module 4 maintains the connection of the power supply line from the power supply 6 to the power management module 7 based on the high-level power supply sustaining signal.

[0081] As described above, the power supply connection module 4 controls the connection and disconnection of the power supply line from the power supply 6 to the power management module 7. When the power button module 1 detects a power button operation, it sends a power-on signal to the power enable module 2. The power enable module 2 responds to the power-on signal and sends an enable signal to the power supply connection module 4, so that the power supply connection module 4 connects the power supply line from the power supply 6 to the power management module 7. When the power supply maintenance module 3 receives the power maintenance signal from the power management module 7, it sends an enable signal to the power supply connection module 4, so that the electronic device can be powered on and used normally. When the electronic device is powered off, the power supply connection module 4 disconnects the power supply line from the power supply 6 to the power management module 7, which can reduce the leakage current of the power supply 6 at the power management module 7 when the power is off, and reduce the power consumption of the electronic device when it is powered off. Meanwhile, the first switching element 21 enables a fast and accurate response to the power-on signal, promptly connecting the power supply line from the power supply 6 to the power management module 7, ensuring the normal power-on of the electronic equipment. The first diode 31 ensures the unidirectional transmission of the power supply maintenance signal to the power supply connection module 4, and the second diode 51 ensures the unidirectional transmission of the power supply maintenance signal to the power supply connection module 4, ensuring the normal operation of the power management module 7.

[0082] Based on the above embodiments, Figure 6 A circuit diagram of a battery power supply control circuit based on parallel batteries, provided in an embodiment of this application, is given. Figure 6 As shown, the power supply connection module 4 provided in this application embodiment includes a second switching element 41 (Q3 in the figure) and a third switching element 42 (Q5 in the figure).

[0083] In this configuration, the control terminal of the second switching element 41 is connected to the power supply enable module 2 (e.g., the control terminal of the second switching element 41 is connected to the source of the first switching element 21), the first connection terminal of the second switching element 41 is connected to the control terminal of the third switching element 42, and the second connection terminal of the second switching element 41 is grounded. Both the first and second connection terminals of the second switching element 41 are turned on when the control terminal receives an enable signal from the power supply enable module 2. The first connection terminal of the third switching element 42 is connected to the power supply 6, and the second connection terminal of the third switching element 42 is connected to the power management module 7. Both the first and second connection terminals of the third switching element 42 are turned on when the potential at the control terminal is lower than a preset potential threshold.

[0084] In one embodiment, the power supply connection module 4 provided by this solution further includes a second capacitor 44 (C2 in the figure), a third capacitor 45 (C3 in the figure), a fourth capacitor 46 (C4 in the figure), a seventh resistor 47 (R7 in the figure), and an eighth resistor 48 (R8 in the figure). The first connection terminal of the second capacitor 44 is connected to the first connection terminal of the third switching element 42, and the second connection terminal of the second capacitor 44 is grounded. The first connection terminal of the third capacitor 45 is connected to the first connection terminal of the third switching element 42, and the second connection terminal of the third capacitor 45 is grounded. The first connection terminal of the fourth capacitor 46 is connected to the first connection terminal of the third switching element 42, and the second connection terminal of the fourth capacitor 46 is connected to the control terminal of the third switching element 42.

[0085] Furthermore, the first connection terminal of the seventh resistor 47 is connected to the first connection terminal of the third switching element 42, the second connection terminal of the seventh resistor 47 is connected to the first connection terminal of the second switching element 41, the first connection terminal of the eighth resistor 48 is connected to the first connection terminal of the second switching element 41, and the second connection terminal of the eighth resistor 48 is connected to the control terminal of the third switching element 42.

[0086] Figure 6 The following description uses an NMOS transistor as the second switching element 41 and a PMOS transistor as the third switching element 42 as an example. The gate, drain, and source of the second switching element 41 are the control terminal, the first connection terminal, and the second connection terminal, respectively. The gate, source, and drain of the third switching element 42 are the control terminal, the first connection terminal, and the second connection terminal, respectively. The drain of the second switching element 41 is connected to the source of the third switching element 42 via a seventh resistor 47. The drain of the second switching element 41 is also connected to the gate of the third switching element 42 via an eighth resistor 48. A fourth capacitor 46 is connected between the source and gate of the third switching element 42. The source of the third switching element 42 is also connected to the first connection terminal of the second capacitor 44 and the first connection terminal of the third capacitor 45. The second connection terminals of the second capacitor 44 and the third capacitor 45 are grounded. The second capacitor 44 and the third capacitor 45 are used to stabilize and filter the connected power supply 6, thereby improving the power supply quality. Furthermore, the cooperation of the fourth capacitor 46, the seventh resistor 47, and the eighth resistor 48 can accurately drive the third switching element and accurately control the on and off of the third switching element.

[0087] For example, when the control terminal of the second switching element 41 does not receive a high-level enable signal, its first and second connection terminals are turned off, disconnecting the power supply line from the power supply 6 to the power management module 7. This reduces leakage current at the power management module 7 when the power supply 6 is powered off, thus lowering the power consumption of the electronic device during shutdown. However, when the control terminal of the second switching element 41 receives a high-level enable signal, its first and second connection terminals are turned on, pulling down the potential of the control terminal of the third switching element 42. This causes the first and second connection terminals of the third switching element 42 to turn on, thereby connecting the power supply line from the power supply 6 to the power management module 7, allowing the power supply 6 to supply power to the power management module 7 normally.

[0088] As described above, the power supply connection module 4 controls the connection and disconnection of the power supply line from the power supply 6 to the power management module 7. When the power button module 1 detects a power button operation, it sends a power-on signal to the power enable module 2. The power enable module 2 responds to the power-on signal and sends an enable signal to the power supply connection module 4, so that the power supply connection module 4 connects the power supply line from the power supply 6 to the power management module 7. When the power supply maintenance module 3 receives the power maintenance signal from the power management module 7, it sends an enable signal to the power supply connection module 4, so that the electronic device can be powered on and used normally. When the electronic device is powered off, the power supply connection module 4 disconnects the power supply line from the power supply 6 to the power management module 7, which can reduce the leakage current of the power supply 6 at the power management module 7 when the power is off, and reduce the power consumption of the electronic device when it is powered off. Meanwhile, the power supply line from the power supply 6 to the power management module 7 is turned on in response to the enable signal by the second switching element 41 and the third switching element 42, ensuring the normal use of the electronic equipment. When the electronic equipment is turned off, the power supply line from the power supply 6 to the power management module 7 is accurately controlled to disconnect, effectively reducing the leakage current of the power supply 6 at the power management module 7 when the power is off, and reducing the power consumption of the electronic equipment when it is turned off.

[0089] Based on the above embodiments, Figure 7 A circuit diagram of a battery power supply control circuit based on a series battery, according to an embodiment of this application, is provided. Figure 7As shown, the power supply connection module 4 provided in this embodiment includes a voltage conversion submodule 43 (DC-CDC step-down module). The enable terminal of the voltage conversion submodule 43 is connected to the output terminal of the power supply enable module 2 (for example, the enable terminal of the voltage conversion submodule 43 is connected to the source of the first switching element 21). The first connection terminal of the voltage conversion submodule 43 is connected to the power supply 6, and the second connection terminal of the voltage conversion submodule 43 is connected to the power management module 7. The voltage conversion submodule 43 is activated when it receives an enable signal. Based on the power supply voltage requirements of the power management module 7, it performs voltage reduction processing on the power supply 6 and supplies power to the power management module 7.

[0090] For example, when the enable terminal of the voltage conversion submodule 43 does not receive a high-level enable signal, the voltage conversion submodule 43 stops working, disconnecting the power supply line from the power supply 6 to the power management module 7, reducing leakage current at the power management module 7 when the power supply 6 is powered off, and lowering the power consumption of the electronic device during shutdown. Conversely, when the enable terminal of the voltage conversion submodule 43 receives a high-level enable signal, the power supply line from the power supply 6 to the power management module 7 is turned on, allowing the power supply 6 to supply power to the power management module 7 normally.

[0091] As described above, the power supply connection module 4 controls the connection and disconnection of the power supply line from the power supply 6 to the power management module 7. When the power button module 1 detects a power button operation, it sends a power-on signal to the power enable module 2. The power enable module 2 responds to the power-on signal and sends an enable signal to the power supply connection module 4, so that the power supply connection module 4 connects the power supply line from the power supply 6 to the power management module 7. When the power supply maintenance module 3 receives the power maintenance signal from the power management module 7, it sends an enable signal to the power supply connection module 4, so that the electronic device can be powered on and used normally. When the electronic device is powered off, the power supply connection module 4 disconnects the power supply line from the power supply 6 to the power management module 7, which can reduce the leakage current of the power supply 6 at the power management module 7 when the power is off, and reduce the power consumption of the electronic device when it is powered off. Meanwhile, the voltage conversion submodule 43 responds to the enable signal to turn on the power supply line from the power supply 6 to the power management module 7, ensuring the normal use of the electronic equipment. When the electronic equipment is turned off, it accurately controls the disconnection of the power supply line from the power supply 6 to the power management module 7, effectively reducing the leakage current of the power supply 6 at the power management module 7 when the power is off, and reducing the power consumption of the electronic equipment during shutdown.

[0092] Figure 8 This is a schematic block diagram of a board provided in an embodiment of this application, such as... Figure 8 As shown, the board provided in this application embodiment includes the battery power supply control circuit as provided in any of the above embodiments.

[0093] As described above, the board controls the connection and disconnection of the power supply line from the power supply to the power management module through the power supply connection module. When the power button module detects a power button operation, it sends a power-on signal to the power enable module. The power enable module responds to the power-on signal and sends an enable signal to the power supply connection module, so that the power supply connection module connects the power supply line from the power supply to the power management module. When the power supply maintenance module receives the power maintenance signal from the power management module, it sends an enable signal to the power supply connection module, allowing the electronic device to power on and be used normally. When the electronic device is powered off, the power supply connection module disconnects the power supply line from the power supply to the power management module, which can reduce leakage current at the power management module when the power supply is turned off, thereby reducing the power consumption of the electronic device during shutdown.

[0094] Figure 9 This is a schematic block diagram of an electronic device provided in an embodiment of this application, such as... Figure 9 As shown, the electronic device provided in this application embodiment includes a battery power supply control circuit as provided in any of the above embodiments or a board as provided in any of the above embodiments.

[0095] As described above, the electronic device controls the connection and disconnection of the power supply line from the power supply power source to the power management module through the power supply connection module. When the power button module detects a power button operation, it sends a power-on signal to the power enable module. The power enable module responds to the power-on signal and sends an enable signal to the power supply connection module, thereby connecting the power supply line from the power supply power source to the power management module. When the power supply maintenance module receives the power maintenance signal from the power management module, it sends an enable signal to the power supply connection module, allowing the electronic device to power on and be used normally. When the electronic device is powered off, the power supply connection module disconnects the power supply line from the power supply power source to the power management module, which reduces leakage current at the power management module during power outages and lowers the power consumption of the electronic device during shutdown.

[0096] The above description is merely a preferred embodiment and the technical principles employed in this application. This application is not limited to the specific embodiments provided herein, and various obvious changes, readjustments, and substitutions that can be made by those skilled in the art will not depart from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application, the scope of which is determined by the scope of the claims.

Claims

1. A battery-powered control circuit, characterized in that, The system includes a power button module, a power enable module, a power sustaining module, and a power connection module. The power button module and the power connection module are both connected to the power enable module. The power sustaining module is connected to the power connection module. The power button module connects to the power supply pins of the power management module and the power enable module. The power sustaining module connects to the power management module. The power connection module connects to the power management module and is used to connect to an external power supply. The power button module is used to send a power-on signal to the power enable module when a power button operation is detected. The power supply enable module is used to send an enable signal to the power supply connection module when the power-on signal is received; The power supply maintenance module is used to send an enable signal to the power supply connection module when it receives a power supply maintenance signal from the power management module. The power supply connection module is used to connect the power supply line from the power supply power source to the power management module when an enable signal is received.

2. The battery power supply control circuit according to claim 1, characterized in that, The power button module includes a power button. The first connection terminal of the power button is used to connect to the power supply pin of the power management module. The first connection terminal of the power button is also connected to the power supply enable module. The second connection terminal of the power button is grounded.

3. The battery power supply control circuit according to claim 1, characterized in that, The power supply enable module includes a first switching element, the control terminal of the first switching element is connected to the power button module, the first connection terminal of the first switching element is used to connect to an external power supply, and the second connection terminal of the first switching element is connected to the power supply connection module.

4. The battery power supply control circuit according to claim 3, characterized in that, The power supply enable module further includes a first resistor, a second resistor, a third resistor, and a first capacitor. The first connection terminal of the first switching element is connected to the power supply via the first resistor. The first connection terminal of the second resistor is connected to the first connection terminal of the first switching element. The second connection terminal of the second resistor is connected to the control terminal of the first switching element. The first connection terminal of the first capacitor is connected to the first connection terminal of the first switching element. The second connection terminal of the first capacitor is connected to the control terminal of the first switching element. The control terminal of the first switching element is connected to the power supply via the third resistor.

5. The battery power supply control circuit according to claim 1, characterized in that, The power supply maintenance module includes a first diode, the anode of which is connected to the first input / output pin of the power management module, and the cathode of which is connected to the power supply connection module. The power management module is used to send a power supply maintenance signal through the first input / output pin when the power supply is stable.

6. The battery power supply control circuit according to claim 1, characterized in that, The power supply connection module includes a second switching element and a third switching element, wherein: The control terminal of the second switching element is connected to the power supply enable module, the first connection terminal of the second switching element is connected to the control terminal of the third switching element, the second connection terminal of the second switching element is grounded, and the first and second connection terminals of the second switching element are turned on when the control terminal receives the enable signal sent by the power supply enable module. The first connection terminal of the third switching element is connected to the power supply, and the second connection terminal of the third switching element is connected to the power management module. The first and second connection terminals of the third switching element are turned on when the control terminal potential is lower than a preset potential threshold.

7. The battery power supply control circuit according to claim 6, characterized in that, The power supply connection module further includes a second capacitor, a third capacitor, a fourth capacitor, a seventh resistor, and an eighth resistor, wherein: The first connection terminal of the second capacitor is connected to the first connection terminal of the third switching element, and the second connection terminal of the second capacitor is grounded. The first connection terminal of the third capacitor is connected to the first connection terminal of the third switching element, and the second connection terminal of the third capacitor is grounded. The first connection terminal of the fourth capacitor is connected to the first connection terminal of the third switching element, and the second connection terminal of the fourth capacitor is connected to the control terminal of the third switching element. The first connection terminal of the seventh resistor is connected to the first connection terminal of the third switching element, the second connection terminal of the seventh resistor is connected to the first connection terminal of the second switching element, the first connection terminal of the eighth resistor is connected to the first connection terminal of the second switching element, and the second connection terminal of the eighth resistor is connected to the control terminal of the third switching element.

8. The battery power supply control circuit according to claim 1, characterized in that, The power supply connection module includes a voltage conversion submodule. The enable terminal of the voltage conversion submodule is connected to the power supply enable module. The first connection terminal of the voltage conversion submodule is connected to the power supply, and the second connection terminal of the voltage conversion submodule is connected to the power management module.

9. The battery power supply control circuit according to claim 1, characterized in that, It also includes an external sustainment module, the output of which is connected to the power supply connection module, and the input of which is connected to the second input / output pin of the power management module, wherein: The external maintenance module is used to send an enable signal to the power connection module when it receives an external power supply signal from the power management module. When an external power source is connected, the power management module sends an external power supply signal to the external maintenance module through the second input / output pin.

10. The battery power supply control circuit according to claim 9, characterized in that, The external sustainment module includes a second diode, the anode of which is connected to the power management module, and the cathode of which is connected to the power supply connection module.

11. The battery power supply control circuit according to any one of claims 1-10, characterized in that, The power supply includes series battery power and / or parallel battery power.

12. A circuit board, characterized in that, Includes the battery power supply control circuit as described in any one of claims 1-10.

13. An electronic device, characterized in that, Includes the battery power supply control circuit as described in any one of claims 1-10 or the board as described in claim 12.

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