Charging circuit, terminal equipment and control method and device of charging circuit
By multiplexing the OTG module of the power management chip as a boost module with wireless reverse charging function, combining the wireless charging chip and charging coil, the problem of wireless reverse charging function of the terminal equipment increasing the circuit complexity and space occupation is achieved, and efficient space is achieved Utilization and cost savings.
Patent Information
- Application Number
- CN202310731510.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-19
- Publication Date
- 2024-12-20
AI Technical Summary
When implementing wireless reverse charging function, existing terminal equipment needs to add additional reverse charging circuits, which increases circuit complexity and space occupation, resulting in compact space inside the equipment.
By multiplexing the OTG module in the power management chip as a boost module with wireless reverse charge function, combining the wireless charging chip and charging coil, the wireless reverse charge function is realized, avoiding the need to add additional components.
The wireless reverse charge function is realized without increasing the complexity of the circuit and space occupation, which improves the utilization rate of the internal space of the terminal device, saves space and reduces costs.
Smart Images
Figure CN119171645A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of terminal charging, and in particular to a charging circuit and terminal equipment, and a control method and device for the charging circuit. Background Art
[0002] In recent years, the development speed of terminal devices such as smart phones has been getting faster and faster, and relevant technologies have made great progress. For example, current terminal devices often have wireless charging functions, and some terminal devices also have wireless reverse charging functions. The wireless reverse charging function refers to the terminal device as a wireless charging transmitter to charge other devices that require wireless charging. However, in the related technology, the terminal device needs to add an additional reverse charging circuit to configure the wireless reverse charging function for the terminal device, which increases the complexity of the circuit in the terminal device and occupies a larger space in the terminal device, making the limited space in the terminal device more compact. Summary of the invention
[0003] In order to overcome the problems existing in the related art, the embodiments of the present disclosure provide a charging circuit and a terminal device, and a control method and device for the charging circuit to solve the defects in the related art.
[0004] According to a first aspect of an embodiment of the present disclosure, there is provided a charging circuit, comprising a battery, a power management chip, a wireless charging chip and a wireless charging coil connected in sequence;
[0005] The power management chip includes an OTG module, the OTG module is used to boost the DC power output by the battery, and the power management chip is used to transmit the DC power boosted by the OTG module to the wireless charging chip;
[0006] The wireless charging chip is used to perform AC-DC inversion on the DC power boosted by the OTG module, and radiate the AC power obtained by the AC-DC inversion outwardly through the wireless charging coil.
[0007] In a possible embodiment of the present disclosure, the OTG module is used to boost the direct current output by the battery to a first voltage value in the wireless reverse charging mode;
[0008] The power management chip is used to transmit the DC power boosted by the OTG module to the wireless charging chip in the wireless reverse charging mode.
[0009] In a possible embodiment of the present disclosure, a charge pump charging chip is further included, and the charge pump charging chip is connected to the wireless charging chip and the battery respectively;
[0010] The wireless charging chip is also used to receive alternating current through the wireless charging coil, convert the alternating current into direct current, and transmit the direct current obtained by the alternating current into direct current to the charge pump charging chip;
[0011] The charge pump charging chip is used to input the direct current power obtained by the wireless charging chip through AC-DC conversion into the battery.
[0012] In a possible embodiment of the present disclosure, the wireless charging chip is further used to transmit the direct current obtained by the AC-DC conversion to the power management chip;
[0013] The power management chip is also used to input the direct current power obtained by the wireless charging chip through AC-DC conversion into a battery or a load device.
[0014] In a possible embodiment of the present disclosure, a first switch unit is further included, one end of which is connected to the wireless charging chip, and the other end of which is respectively connected to the power management chip and the charge pump charging chip.
[0015] In a possible embodiment of the present disclosure, a USB interface is further included, and the USB interface is connected to the power management chip. The power management chip is also used to transmit the DC power boosted by the OTG module to the OTG device connected to the USB interface.
[0016] In a possible embodiment of the present disclosure, the OTG module is used to boost the direct current output by the battery to a second voltage value in the OTG mode;
[0017] The power management chip is used to transmit the DC power boosted by the OTG module to the OTG device connected to the USB interface in the OTG mode.
[0018] In a possible embodiment of the present disclosure, the USB interface is also connected to the charge pump charging chip, and the charge pump charging chip is also used to receive direct current through the USB interface and input the received direct current into the battery;
[0019] The power management chip is also used to receive direct current through the USB interface and input the received direct current to a battery or a load device.
[0020] In a possible embodiment of the present disclosure, a second switch unit is further included, wherein one end of the first switch unit is connected to the USB interface, and the other end is respectively connected to the power management chip and the charge pump charging chip.
[0021] According to a second aspect of an embodiment of the present disclosure, a terminal device is provided, comprising the charging circuit described in the first aspect.
[0022] According to a third aspect of an embodiment of the present disclosure, a charging circuit control method is provided, including:
[0023] When the charging circuit is in the wireless reverse charging mode, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and the DC power boosted by the OTG module is transmitted to the wireless charging chip;
[0024] The wireless charging chip is controlled to perform AC-DC inversion on the DC power boosted by the OTG module, and the AC power obtained by the AC-DC inversion is radiated outwardly through the wireless charging coil.
[0025] In a possible embodiment of the present disclosure, it further includes:
[0026] Obtain the connection status of the USB interface, wherein the connection status includes no device connected, connected to a charger, and connected to an OTG device;
[0027] When the charging circuit is in the wireless reverse charging mode, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and the DC power boosted by the OTG module is transmitted to the wireless charging chip, including:
[0028] When the charging circuit is in the wireless reverse charging mode and the connection state of the USB interface is that no device is connected, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and transmit the boosted DC power of the OTG module to the wireless charging chip.
[0029] In a possible embodiment of the present disclosure, it further includes:
[0030] When the charging circuit is in OTG mode and the connection state of the USB interface is connected to an OTG device, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and transmit the boosted DC power of the OTG module to the OTG device connected to the USB interface.
[0031] In a possible embodiment of the present disclosure, the method further includes:
[0032] When the charging circuit is in the wireless reverse charging mode, the first switch unit is controlled to be turned on, and the second switch unit is controlled to be turned off.
[0033] According to a fourth aspect of an embodiment of the present disclosure, a charging circuit control device is provided, including:
[0034] A boost module, used to control the OTG module of the power management chip to boost the DC power output by the battery when the charging circuit is in the wireless reverse charging mode, and transmit the DC power boosted by the OTG module to the wireless charging chip;
[0035] The reverse charging module is used to control the wireless charging chip to perform AC-DC inversion on the DC power boosted by the OTG module, and radiate the AC power obtained by the AC-DC inversion outward through the wireless charging coil.
[0036] In a possible embodiment of the present disclosure, an acquisition module is further included, which is used to:
[0037] Obtain the connection status of the USB interface, wherein the connection status includes no device connected, connected to a charger, and connected to an OTG device;
[0038] The boost module is specifically used for:
[0039] When the charging circuit is in the wireless reverse charging mode and the connection state of the USB interface is that no device is connected, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and transmit the boosted DC power of the OTG module to the wireless charging chip.
[0040] In a possible embodiment of the present disclosure, the boost module is further used for:
[0041] When the charging circuit is in OTG mode and the connection state of the USB interface is connected to an OTG device, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and transmit the boosted DC power of the OTG module to the OTG device connected to the USB interface.
[0042] In a possible embodiment of the present disclosure, the boost module is further used for:
[0043] When the charging circuit is in the wireless reverse charging mode, the first switch unit is controlled to be turned on, and the second switch unit is controlled to be turned off.
[0044] According to a fifth aspect of an embodiment of the present disclosure, an electronic device is provided, comprising a memory and a processor, wherein the memory is used to store computer instructions executable on the processor, and the processor is used to implement the method described in the third aspect when executing the computer instructions.
[0045] According to a sixth aspect of an embodiment of the present disclosure, there is provided a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the method described in the third aspect is implemented.
[0046] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:
[0047] In the charging circuit provided by the embodiment of the present disclosure, the OTG module in the power management chip that was originally used to boost the OTG function is reused as a boost module for the wireless reverse charging function, so that the DC power output by the battery is radiated outward by the wireless charging coil after being boosted by the OTG module and converted by the wireless charging chip, thereby realizing wireless reverse charging. The components in the charging circuit are all original components in wireless charging and battery power supply, so the wireless reverse charging function is realized without adding additional components; if the charging circuit is applied to the terminal device, the wireless reverse charging function can be realized while avoiding increasing the complexity of the circuit in the terminal device, thereby improving the utilization rate of the space in the terminal device and saving space for the expansion and enrichment of other functions. BRIEF DESCRIPTION OF THE DRAWINGS
[0048] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.
[0049] Figure 1 is a structural schematic diagram of a charging circuit shown in an exemplary embodiment of the present disclosure;
[0050] Figure 2 is a flow chart of a charging circuit control method shown in an exemplary embodiment of the present disclosure;
[0051] Figure 3 is a flow chart of a charging circuit control method shown in an exemplary embodiment of the present disclosure;
[0052] Figure 4 is a structural schematic diagram of a charging circuit control device shown in an exemplary embodiment of the present disclosure;
[0053] Figure 5 It is a structural block diagram of an electronic device shown in an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION
[0054] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.
[0055] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.
[0056] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".
[0057] In recent years, the development speed of terminal devices such as smart phones has been getting faster and faster, and relevant technologies have made great progress. For example, current terminal devices often have wireless charging functions, and some terminal devices also have wireless reverse charging functions. The wireless reverse charging function refers to the terminal device as a wireless charging transmitter to charge other devices that require wireless charging. However, in the related technology, the terminal device needs to add an additional reverse charging circuit to configure the wireless reverse charging function for the terminal device, which increases the complexity of the circuit in the terminal device and occupies a larger space in the terminal device, making the limited space in the terminal device more compact.
[0058] Based on this, on the first aspect, at least one embodiment of the present disclosure provides a charging circuit, which can be applied to a terminal device to enable the terminal device to realize a wireless reverse charging function; the components involved in the charging circuit can be components in the original charging circuit and power supply circuit in the terminal device, thereby avoiding space congestion in the terminal device due to the addition of components.
[0059] Please refer to the attached Figure 1 The charging circuit may include a battery, a power management chip, a wireless charging chip and a wireless charging coil connected in sequence, a charge pump charging chip connected to the wireless charging chip (Power Management IC, PMIC) and the battery respectively, and a USB interface connected to the power management chip and the charge pump charging chip respectively.
[0060] Among them, the USB interface, power management chip, charge pump charging chip and battery constitute a wired charging path. The following is a detailed introduction to the above components and wired charging path. The USB interface can be a Type-C interface, etc. The USB interface can be connected to a charger, and the charger can convert AC power into DC power. The power management chip can have a first input pin USB_IN and a first output pin VOUT, the USB interface can be connected to the first input pin USB_IN, and the battery can be connected to the first output pin VOUT. The charge pump charging chip can have a second input pin USB_IN and a second output pin VOUT, the USB interface can be connected to the second input pin USB_IN, and the battery can be connected to the second output pin VOUT.
[0061] Exemplarily, the charge pump charging chip can be used to receive direct current (such as direct current input by a charger) through the USB interface, and input the received direct current to the battery. In other words, the USB interface, the charge pump charging chip and the battery are connected in sequence to form a charging path for wired charging.
[0062] As another example, the power management chip is also used to receive direct current through the USB interface, and input the received direct current to a battery or a load device. That is to say, the USB interface, the power management chip and the battery are connected in sequence to form a charging path for wired charging, and the USB interface, the power management chip and the load device form a load power supply path during the wired charging process. Among them, the load device can be a load of a terminal device, such as a display screen, a speaker, a sensor, etc.
[0063] The above two examples respectively introduce the two charging paths of wired charging. Next, the relationship between the two charging paths will be further explained. First of all, it should be made clear that the charge pump charging chip charges the battery faster and undertakes the task of fast charging. Relatively speaking, the power management chip charges the battery slower and undertakes the task of ordinary charging. That is, the charge pump charging chip charges the battery faster than the power management chip; and the charge pump charging chip has a higher voltage requirement for DC power. Relatively speaking, the power management chip has a lower voltage requirement for DC power. That is, the working voltage of the charge pump charging chip is higher than the working voltage of the power management chip. When a charger is connected to the USB interface of a terminal device for wired charging, if the charging voltage is high, the voltage of the DC power input to the USB interface meets the voltage requirement of the charge pump charging chip for DC power, so the USB interface can transmit DC power to the charge pump charging chip to charge the battery, or the USB interface can transmit DC power to the charge pump charging chip and the power management chip, so that the charge pump charging chip charges the battery and the power management chip supplies power to the load device; when a charger is connected to the USB interface of a terminal device for wired charging, if the charging voltage is low, the voltage of the DC power input to the USB interface does not meet the voltage requirement of the charge pump charging chip for DC power, so the USB interface can transmit DC power to the power management chip to charge the battery and / or supply power to the load device.
[0064] The power management chip may include an OTG module, which is a direct current step-up (DC-DC) module that serves the OTG function of the terminal device. The OTG function refers to the connection of an OTG device such as a headset or a mouse to a USB interface, and the terminal device charges or supplies power to the OTG device. Specifically, the OTG module may be used to step up the direct current output by the battery, and the power management chip may be used to transmit the stepped-up direct current of the OTG module to the OTG device connected to the USB interface.
[0065] Among them, the wireless charging coil, wireless charging chip, power management chip, charge pump charging chip and battery constitute the wireless charging path. The following is a detailed introduction to the above components and wireless charging path.
[0066] The wireless charging coil has an electromagnetic conversion function, that is, it can radiate AC power outward in the form of electromagnetic waves, etc., and can also receive AC power transmitted by the wireless charging transmitter (such as a wireless charger or other terminal equipment with wireless reverse charging function) in the form of electromagnetic waves, etc. The wireless charging chip can have a receiving (RX) mode and an output (TX) mode. In the receiving mode, the AC power received by the wireless charging coil can be converted from AC to DC, that is, the AC power can be converted into DC power. In the output mode, the DC power can be inverted from AC to DC, that is, the DC power can be converted into AC power and radiated outward through the wireless charging coil.
[0067] The power management chip may have a third input pin WLS_IN and a second output pin VOUT, the wireless charging chip may be connected to the third input pin WLS_IN, and the battery may be connected to the first output pin VOUT. The charge pump charging chip may have a fourth input pin WLS_IN and a second output pin VOUT, the wireless charging chip may be connected to the second input pin USB_IN, and the battery may be connected to the second output pin VOUT.
[0068] For example, in the receiving mode, the wireless charging chip can be used to receive AC power through the wireless charging coil, convert the AC power to DC power, and transmit the DC power obtained by the AC-DC conversion to the charge pump charging chip, and the charge pump charging chip can be used to input the DC power obtained by the wireless charging chip through the AC-DC conversion into the battery. In other words, the wireless charging coil, the wireless charging chip, the charge pump charging chip and the battery are connected in sequence to form a charging path for wireless charging.
[0069] As another example, the wireless charging chip can be used in the receiving mode to receive AC power through the wireless charging coil, and perform AC-DC conversion on the AC power, and transmit the DC power obtained by the AC-DC conversion to the power management chip, and the power management chip can be used to input the DC power obtained by the wireless charging chip through the AC-DC conversion into a battery or a load device. In other words, the wireless charging coil, the wireless charging chip, the power management chip and the battery are connected in sequence to form a charging path for wireless charging, and the wireless charging coil, the wireless charging chip, the power management chip and the load device form a load power supply path during the wireless charging process. Among them, the load device can be a load of a terminal device, such as a display screen, a speaker, a sensor, etc.
[0070] The above two examples respectively introduce the two charging paths of wireless charging. Next, the relationship between the two charging paths will be further explained. First of all, it should be made clear that the charge pump charging chip charges the battery faster and undertakes the task of fast charging. Relatively speaking, the power management chip charges the battery slower and undertakes the task of ordinary charging. That is, the charge pump charging chip charges the battery faster than the power management chip; and the charge pump charging chip has a higher voltage requirement for DC power. Relatively speaking, the power management chip has a lower voltage requirement for DC power. That is, the working voltage of the charge pump charging chip is higher than the working voltage of the power management chip. When the terminal device is charged by the wireless charging transmitter as a receiving end, if the charging voltage is high, the voltage of the DC power obtained by the wireless charging chip through AC-DC conversion meets the voltage requirement of the charge pump charging chip for DC power. Therefore, the wireless charging chip can transmit DC power to the charge pump charging chip to charge the battery, or the wireless charging chip can transmit DC power to the charge pump charging chip and the power management chip, so that the charge pump charging chip charges the battery and the power management chip supplies power to the load device; when the terminal device is charged by the wireless charging transmitter as a receiving end, if the charging voltage is low, the voltage of the DC power obtained by the wireless charging chip through AC-DC conversion does not meet the voltage requirement of the charge pump charging chip for DC power. Therefore, the wireless charging chip can transmit DC power to the power management chip to charge the battery and / or supply power to the load device.
[0071] It should be noted that the power management chip can also be used to transmit the DC power boosted by the OTG module to the wireless charging chip; the wireless charging chip can also be used to convert the DC power boosted by the OTG module into AC-DC power, and radiate the AC power obtained by the AC-DC power conversion outward through the wireless charging coil. Thus, the wireless reverse charging function is realized by reusing the boost technology of the OTG module. If there is a device that needs wireless charging within the radiation range of the wireless charging coil, the device can be charged.
[0072] The OTG module can boost the DC power output by the battery within a certain range, for example, it can boost the DC power output by the battery from 4.5V to 5-12V. The OTG module boosts the DC power output by the battery in both the OTG function and the wireless reverse charging function, so the OTG module can boost the voltage according to the voltage requirements of each function in the above two cases.
[0073] For example, when the terminal device performs the wireless reverse charging function, the power management module can be adjusted to the wireless reverse charging mode, the OTG module can be used to boost the DC power output by the battery to a first voltage value (e.g., 12V) in the wireless reverse charging mode, and the power management chip can be used to transmit the DC power boosted by the OTG module to the wireless charging chip in the wireless reverse charging mode. In the wireless reverse charging mode, the power management chip can input the DC power output by the battery from the first output pin VOUT, and transmit the DC power to the wireless charging chip from the third input pin WLS_IN.
[0074] For example, when the terminal device performs the OTG function, the power management module can be adjusted to the OTG mode. The OTG module can be used to boost the DC power output by the battery to a second voltage value (e.g., 5V) in the OTG mode, and the power management chip can be used to transmit the DC power boosted by the OTG module to the OTG device connected to the USB interface in the OTG mode. In the OTG mode, the power management chip can input the DC power output by the battery from the first output pin VOUT, and transmit the DC power to the USB interface from the first input pin USB_IN. In other words, the power management chip can select different pins in different modes to output the DC power boosted by the OTG module to different components.
[0075] It can be seen from the above wired charging path and wireless charging path that the power management chip and the charge pump charging chip are reused by the wired charging path and the wireless charging path. In order to avoid interference between different paths, in some embodiments of the present disclosure, a first switch unit and a second switch unit are provided in the charging circuit to achieve isolation between different charging paths.
[0076] The first switch unit may be composed of at least one field effect transistor switch, for example Figure 1 The first switch unit is composed of two field effect transistor switches Q1 and Q2; one end of the first switch unit is connected to the wireless charging chip, and the other end is connected to the power management chip and the charge pump charging chip respectively.
[0077] The second switch unit may be composed of at least one field effect transistor switch, for example Figure 1 The first switch unit is composed of two field effect transistor switches Q3 and Q4; one end of the first switch unit is connected to the USB interface, and the other end is connected to the power management chip and the charge pump charging chip respectively.
[0078] For example, the first switch unit can be disconnected and the second switch unit can be turned on during wired charging or when the OTG function is running; the first switch unit can be turned on and the second switch unit can be disconnected during wireless charging or when the wireless reverse charging function is running. The first switch unit can be connected to the WL_GATE pin of the charge pump charging chip. If the charge pump charging chip pulls up the potential of the WL_GATE pin, the first switch unit can be turned on. If the charge pump charging chip pulls down the potential of the WL_GATE pin, the first switch unit can be turned off. The first switch unit can be connected to the USB_GATE pin of the charge pump charging chip. If the charge pump charging chip pulls up the potential of the USB_GATE pin, the first switch unit can be turned on. If the charge pump charging chip pulls down the potential of the USB_GATE pin, the first switch unit can be turned off.
[0079] It is understandable that priorities can be set for wired charging, OTG function, wireless charging, wireless reverse charging function, etc., so that when more than two operating conditions are met at the same time, the one with a higher priority is selected for operation, that is, the components involved are operated according to the requirements of the one with a higher priority. For example, the priority of wired charging and OTG functions is higher than that of the wireless reverse charging function of the wireless charging box. In this case, wired charging is operated when a charger is connected to the USB interface, the OTG function is operated when an OTG device is connected to the USB interface, wireless charging is operated when no device (i.e., charger and OTG device) is connected to the USB interface and the coil of the wireless transmitter radiates AC power to the wireless charging coil, and the wireless reverse charging function is operated when no device (i.e., charger and OTG device) is connected to the USB interface and the wireless reverse charging function is started.
[0080] In the charging circuit provided by the embodiment of the present disclosure, the OTG module in the power management chip that was originally used to boost the OTG function is reused as a boost module for the wireless reverse charging function, so that the DC power output by the battery is radiated outward by the wireless charging coil after the boost of the OTG module and the AC-DC inversion of the wireless charging chip, thereby realizing wireless reverse charging. The components in the charging circuit are all original devices in wireless charging and battery power supply, so the wireless reverse charging function is realized without adding additional components; if the charging circuit is applied to the terminal device, the wireless reverse charging function can be realized, and the complexity of the circuit in the terminal device is avoided, thereby improving the utilization rate of the space in the terminal device and saving space for the expansion and enrichment of other functions. In particular, compared with the related art that realizes the wireless reverse charging function by setting a reverse charging circuit composed of a Boost chip and a power load switch, it can save space in the terminal device and reduce costs and circuit complexity.
[0081] In a second aspect, at least one embodiment of the present disclosure provides a terminal device, comprising the charging circuit described in the first aspect.
[0082] In a third aspect, at least one embodiment of the present disclosure provides a charging circuit control method, which can be applied to the terminal device described in the second aspect to control the charging circuit described in the first aspect.
[0083] Please refer to the attached Figure 2 , which shows the process of the method, including step S201 to step S202.
[0084] In step S201, when the charging circuit is in the wireless reverse charging mode, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and the boosted DC power of the OTG module is transmitted to the wireless charging chip.
[0085] Exemplarily, the wireless reverse charging function can be started through the UI interface of the terminal device to put the charging circuit into the wireless reverse charging mode.
[0086] In step S202, the wireless charging chip is controlled to perform AC-DC inversion on the DC power boosted by the OTG module, and the AC power obtained by the AC-DC inversion is radiated outwardly through the wireless charging coil.
[0087] Exemplarily, the connection status of the USB interface can also be obtained, wherein the connection status includes no device connected, connected to a charger, and connected to an OTG device. In this step, when the charging circuit is in wireless reverse charging mode and the connection status of the USB interface is no device connected, the OTG module of the power management chip can be controlled to boost the DC power output by the battery, and the boosted DC power of the OTG module can be transmitted to the wireless charging chip.
[0088] In addition, when the charging circuit is in OTG mode and the connection state of the USB interface is connected to an OTG device, the OTG module of the power management chip can be controlled to boost the DC power output by the battery, and the DC power boosted by the OTG module can be transmitted to the OTG device connected to the USB interface.
[0089] It can be understood that during the wireless reverse charging process, the connection status of the USB interface can be obtained once every preset time interval (for example, 1s). If a charger is connected, it will switch to wired charging and stop wireless reverse charging. If an OTG device is connected, it will switch to the OTG function and stop wireless reverse charging.
[0090] As another example, when the charging circuit is in the wireless reverse charging mode, the first switch unit can be controlled to be turned on, and the second switch unit can be controlled to be turned off, so that the power management chip can transmit current to the wireless charging chip through the third input pin WLS_IN, and avoid the direct current boosted by the OTG module from being reversely fed to the USB interface through the second input pin USB_IN.
[0091] It is also possible to control the first switch unit to be disconnected and the second switch unit to be turned on when the charging circuit is in the OTG mode, so that the power management chip can transmit current to the USB interface through the second input pin USB_IN, and avoid the direct current boosted by the OTG module from being backflowed to the wireless charging chip through the third input pin WLS_IN.
[0092] See attached Figure 3 , which exemplarily shows a flow chart of a charging circuit control method obtained by combining the above multiple embodiments, the method comprises the following steps:
[0093] Step S301: receiving an instruction for turning on the wireless reverse charging function input by a user through an interactive interface. The user may turn on the wireless reverse charging function by operating the interactive interface of the terminal device.
[0094] Step S302: Control the PMIC to boost the DC power output by the battery to 12V through the OTG module. The voltage of the DC power output by the battery is 4.5V.
[0095] Step S303: Detect whether the USB interface is connected to a charger or an OTG device.
[0096] Step S304: turn off the wireless reverse charging function and turn on the wired fast charging or wired reverse charging function. If a charger is connected to the USB interface, the wired fast charging function is turned on; if an OTG device is connected to the USB interface, the wired reverse charging function is turned on.
[0097] Step S305: Control the first switch unit to be turned on, so that the DC power boosted to 12V is transmitted from the WLS_IN of the PMIC to the wireless charging chip; control the second switch unit to be turned off, so as to prevent the DC power boosted to 12V from flowing back from the USB_IN of the PMIC to the USB interface.
[0098] Step S306: The wireless charging chip detects 12V DC input and switches to TX mode.
[0099] Step S307: the wireless charging chip performs AC-DC inversion on the 12V DC power in the TX mode, and radiates the obtained AC power outward through the wireless charging coil.
[0100] Step S308: Detect whether the USB interface is connected to a charger or an OTG device. This step is cyclically executed at intervals of 1 second when the wireless reverse charging function is continuously running, that is, the USB interface is detected once every 1 second, and step S309 or step S310 is executed according to the detection result.
[0101] Step S309: turn off the wireless reverse charging function and turn on the wired fast charging or wired reverse charging function. If a charger is connected to the USB interface, the wired fast charging function is turned on; if an OTG device is connected to the USB interface, the wired reverse charging function is turned on.
[0102] Step S310: The wireless reverse charging function continues to operate.
[0103] More details about this method have been introduced in detail when introducing the charging circuit in the first aspect, and will not be repeated here.
[0104] According to a fourth aspect of the present disclosure, a charging circuit control device is provided. Figure 4 , the device comprises:
[0105] A boost module 401 is used to control the OTG module of the power management chip to boost the DC power output by the battery when the charging circuit is in the wireless reverse charging mode, and transmit the DC power boosted by the OTG module to the wireless charging chip;
[0106] The reverse charging module 402 is used to control the wireless charging chip to perform AC-DC inversion on the DC power boosted by the OTG module, and radiate the AC power obtained by the AC-DC inversion outward through the wireless charging coil.
[0107] In a possible embodiment of the present disclosure, an acquisition module is further included, which is used to:
[0108] Obtain the connection status of the USB interface, wherein the connection status includes no device connected, connected to a charger, and connected to an OTG device;
[0109] The boost module is specifically used for:
[0110] When the charging circuit is in the wireless reverse charging mode and the connection state of the USB interface is that no device is connected, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and transmit the boosted DC power of the OTG module to the wireless charging chip.
[0111] In a possible embodiment of the present disclosure, the boost module is further used for:
[0112] When the charging circuit is in OTG mode and the connection state of the USB interface is connected to an OTG device, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and transmit the boosted DC power of the OTG module to the OTG device connected to the USB interface.
[0113] In a possible embodiment of the present disclosure, the boost module is further used for:
[0114] When the charging circuit is in the wireless reverse charging mode, the first switch unit is controlled to be turned on, and the second switch unit is controlled to be turned off.
[0115] According to a fifth aspect of the embodiments of the present disclosure, an electronic device is provided. Figure 4 It exemplarily shows a block diagram of a terminal device. For example, the electronic device 400 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.
[0116] Reference Figure 5 , the electronic device 500 may include one or more of the following components: a processing component 502 , a memory 504 , a power component 506 , a multimedia component 508 , an audio component 510 , an input / output (I / O) interface 512 , a sensor component 514 , and a communication component 516 .
[0117] The processing component 502 generally controls the overall operation of the electronic device 500, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 502 may include one or more processors 520 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 502 may include one or more modules to facilitate the interaction between the processing component 502 and other components. For example, the processing component 502 may include a multimedia module to facilitate the interaction between the multimedia component 508 and the processing component 502.
[0118] The memory 504 is configured to store various types of data to support operations on the device 500. Examples of such data include instructions for any application or method operating on the electronic device 500, contact data, phone book data, messages, pictures, videos, etc. The memory 504 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.
[0119] The power component 506 provides power to the various components of the electronic device 500. The power component 506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device 500.
[0120] The multimedia component 508 includes a screen that provides an output interface between the electronic device 500 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 508 includes a front camera and / or a rear camera. When the electronic device 500 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and the rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
[0121] The audio component 510 is configured to output and / or input audio signals. For example, the audio component 510 includes a microphone (MIC), and when the electronic device 500 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 504 or sent via the communication component 516. In some embodiments, the audio component 510 also includes a speaker for outputting audio signals.
[0122] I / O interface 512 provides an interface between processing component 502 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.
[0123] The sensor assembly 514 includes one or more sensors for providing various aspects of status assessment for the electronic device 500. For example, the sensor assembly 514 can detect the open / closed state of the electronic device 500, the relative positioning of components, such as the display and keypad of the electronic device 500, and the sensor assembly 514 can also detect the position change of the electronic device 500 or a component of the electronic device 500, the presence or absence of user contact with the electronic device 500, the orientation or acceleration / deceleration of the electronic device 500, and the temperature change of the electronic device 500. The sensor assembly 514 can also include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 514 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 514 can also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
[0124] The communication component 516 is configured to facilitate wired or wireless communication between the electronic device 500 and other devices. The electronic device 500 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, 4G or 5G or a combination thereof. In an exemplary embodiment, the communication component 516 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 516 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.
[0125] In an exemplary embodiment, the electronic device 500 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.
[0126] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.
[0127] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims
1. A charging circuit, characterized in that: It includes a battery, a power management chip, a wireless charging chip and a wireless charging coil connected in sequence; The power management chip includes an OTG module, the OTG module is used to boost the DC power output by the battery, and the power management chip is used to transmit the DC power boosted by the OTG module to the wireless charging chip; The wireless charging chip is used to perform AC-DC inversion on the DC power boosted by the OTG module, and radiate the AC power obtained by the AC-DC inversion outwardly through the wireless charging coil.
2. The charging circuit according to claim 1, characterized in that: The OTG module is used to boost the direct current output by the battery to a first voltage value in the wireless reverse charging mode; The power management chip is used to transmit the DC power boosted by the OTG module to the wireless charging chip in the wireless reverse charging mode.
3. The charging circuit according to claim 1, characterized in that: It also includes a charge pump charging chip, which is connected to the wireless charging chip and the battery respectively; The wireless charging chip is also used to receive alternating current through the wireless charging coil, convert the alternating current into direct current, and transmit the direct current obtained by the alternating current into direct current to the charge pump charging chip; The charge pump charging chip is used to input the direct current power obtained by the wireless charging chip through AC-DC conversion into the battery.
4. The charging circuit according to claim 3, characterized in that: The wireless charging chip is also used to transmit the direct current obtained by the AC-DC conversion to the power management chip; The power management chip is also used to input the direct current power obtained by the wireless charging chip through AC-DC conversion into a battery or a load device.
5. The charging circuit according to claim 4, characterized in that: It also includes a first switch unit, one end of which is connected to the wireless charging chip, and the other end of which is respectively connected to the power management chip and the charge pump charging chip.
6. The charging circuit according to claim 3, characterized in that: It also includes a USB interface, which is connected to the power management chip. The power management chip is also used to transmit the DC power boosted by the OTG module to the OTG device connected to the USB interface.
7. The charging circuit according to claim 6, characterized in that: The OTG module is used to boost the direct current output by the battery to a second voltage value in the OTG mode; The power management chip is used to transmit the DC power boosted by the OTG module to the OTG device connected to the USB interface in the OTG mode.
8. The charging circuit according to claim 6, characterized in that: The USB interface is also connected to the charge pump charging chip, and the charge pump charging chip is also used to receive direct current through the USB interface and input the received direct current into the battery; The power management chip is also used to receive direct current through the USB interface and input the received direct current to a battery or a load device.
9. The charging circuit according to claim 6, characterized in that: It also includes a second switch unit, one end of which is connected to the USB interface, and the other end of which is respectively connected to the power management chip and the charge pump charging chip.
10. A terminal device, characterized in that: The charging circuit comprises the charging circuit according to any one of claims 1 to 9.
11. A charging circuit control method, characterized in that: include: When the charging circuit is in the wireless reverse charging mode, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and the DC power boosted by the OTG module is transmitted to the wireless charging chip; The wireless charging chip is controlled to perform AC-DC inversion on the DC power boosted by the OTG module, and the AC power obtained by the AC-DC inversion is radiated outwardly through the wireless charging coil.
12. The charging circuit control method according to claim 11, characterized in that: Also includes: Obtain the connection status of the USB interface, wherein the connection status includes no device connected, connected to a charger, and connected to an OTG device; When the charging circuit is in the wireless reverse charging mode, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and the DC power boosted by the OTG module is transmitted to the wireless charging chip, including: When the charging circuit is in the wireless reverse charging mode and the connection state of the USB interface is that no device is connected, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and transmit the boosted DC power of the OTG module to the wireless charging chip.
13. The charging circuit control method according to claim 12, characterized in that: Also includes: When the charging circuit is in OTG mode and the connection state of the USB interface is connected to an OTG device, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and transmit the boosted DC power of the OTG module to the OTG device connected to the USB interface.
14. The charging circuit control method according to claim 11, characterized in that: The method further comprises: When the charging circuit is in the wireless reverse charging mode, the first switch unit is controlled to be turned on, and the second switch unit is controlled to be turned off.
15. A charging circuit control device, characterized in that: include: A boost module, used to control the OTG module of the power management chip to boost the DC power output by the battery when the charging circuit is in the wireless reverse charging mode, and transmit the DC power boosted by the OTG module to the wireless charging chip; The reverse charging module is used to control the wireless charging chip to perform AC-DC inversion on the DC power boosted by the OTG module, and radiate the AC power obtained by the AC-DC inversion outwardly through the wireless charging coil.
16. The charging circuit control device according to claim 15, characterized in that: Also includes acquisition modules for: Obtain the connection status of the USB interface, wherein the connection status includes no device connected, connected to a charger, and connected to an OTG device; The boost module is specifically used for: When the charging circuit is in the wireless reverse charging mode and the connection state of the USB interface is that no device is connected, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and transmit the boosted DC power of the OTG module to the wireless charging chip.
17. The charging circuit control device according to claim 16, characterized in that: The boost module is also used for: When the charging circuit is in OTG mode and the connection state of the USB interface is connected to an OTG device, the OTG module of the power management chip is controlled to boost the DC power output by the battery, and transmit the boosted DC power of the OTG module to the OTG device connected to the USB interface.
18. The charging circuit control device according to claim 15, characterized in that: The boost module is also used for: When the charging circuit is in the wireless reverse charging mode, the first switch unit is controlled to be turned on, and the second switch unit is controlled to be turned off.
19. An electronic device, characterized in that: The electronic device comprises a memory and a processor, wherein the memory is used to store computer instructions executable on the processor, and the processor is used to implement the method according to any one of claims 11 to 14 when executing the computer instructions.
20. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 11 to 14 is implemented.