Circuit and method for RTC self-adaptive charging in electronic equipment

Abstract

The invention provides a circuit for RTC adaptive charging in electronic equipment, and the circuit comprises an adapter charging chip which is used for controlling the electronic equipment to be in an AC mode or a DC mode based on a charging signal; the first end of the power supply battery is connected with the adapter charging chip, the second end of the power supply battery is connected with the RTC, and the power supply battery is used for outputting a first power supply signal to the RTC when the adapter charging chip controls the electronic equipment to be in an alternating current mode; the self-adaptive charging module is connected with the power supply battery and is used for acquiring an electric energy signal when the adapter charging chip controls the electronic equipment to be in a direct current mode so as to output a second power supply signal to the RTC; the first power supply signal and the second power supply signal enable the RTC to achieve a target function. When the power supply of the RTC is insufficient, the RTC can work continuously through self-adaptive charging, the utilization rate of the RTC is improved, and meanwhile, the problem that the service life of a battery is shortened due to the fact that the RTC occupies the electric quantity of the battery can be solved through self-adaptive charging of the RTC.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and in particular to a circuit and method for RTC adaptive charging in electronic devices. Background Art

[0002] Real-time clocks (RTCs) typically rely on coin-cell batteries for power. However, when the battery is depleted, it must be replaced promptly to continue operation, resulting in low RTC utilization. Consequently, many designs currently reserve RTC capacity within the laptop battery. However, compared to designs where the RTC relies on an external coin-cell battery, these designs result in higher self-discharge rates for laptop batteries and are significantly affected by aging. Furthermore, the RTC consumes some of the battery's capacity, shortening its lifespan. Summary of the Invention

[0003] The present application provides a circuit and method for RTC adaptive charging in electronic devices to at least solve the above technical problems existing in the prior art.

[0004] The present application provides a circuit for RTC adaptive charging in an electronic device, the circuit comprising:

[0005] The adapter charging chip is used to control the electronic device to operate in AC or DC mode based on the charging signal;

[0006] a power supply battery, a first end of which is connected to the adapter charging chip, and a second end of which is connected to a real-time clock (RTC), and configured to output a first power supply signal to the RTC when the adapter charging chip controls the electronic device to be in an AC power mode;

[0007] An adaptive charging module is connected to the power supply battery and is used to obtain a power signal when the adapter charging chip controls the electronic device to a direct current mode, so as to output a second power supply signal to the RTC; wherein the first power supply signal and the second power supply signal can enable the RTC to achieve the target function.

[0008] In one possible implementation manner, the adaptive charging module is further configured to output a third power supply signal to the power supply battery when the adapter charging chip controls the electronic device to be in direct current mode, so as to enable the power supply battery to store electricity.

[0009] In one embodiment, the adaptive charging module includes a solar receiver and a solar charging chip connected to the solar receiver, wherein the solar receiver is used to receive solar energy;

[0010] The solar charging chip is used to convert the solar energy received by the solar receiver into an electric energy signal to output a second power supply signal to the RTC or output a third power supply signal to the power supply battery.

[0011] In one embodiment, the adaptive charging module further includes a booster connected to the solar charging chip, which is used to control the electronic device circuit to boost the voltage to a target voltage based on the power signal when in the on state, so as to output a second power supply signal to the RTC or a third power supply signal to the power supply battery.

[0012] In one embodiment, the circuit further includes:

[0013] A control chip is connected to the booster and is used to control the booster to be in an on or off state, so that when the booster is in the on state, it controls the electronic device circuit to boost the voltage to a target voltage based on the power signal. In one embodiment, when the adapter charging chip controls the electronic device to be in direct current mode and the power of the power supply battery is less than or equal to a preset power level, the adaptive charging module is used to output a second power supply signal to the RTC;

[0014] When the adapter charging chip controls the electronic device to be in direct current mode and the power of the power supply battery is greater than a preset power, the adaptive charging module is used to output a third power supply signal to the power supply battery.

[0015] In one embodiment, the target voltage includes a first target voltage and a second target voltage; when the adapter charging chip controls the electronic device to be in direct current mode and the power of the power supply battery is less than or equal to a preset power, the booster is configured to control the electronic device circuit to boost the voltage to the first target voltage based on the power signal in the turned-on state, so as to output a second power supply signal to the RTC;

[0016] When the adapter charging chip controls the electronic device to be in direct current mode and the power of the power supply battery is greater than a preset power, the booster is used to control the electronic device circuit to boost to a second target voltage based on the power signal in the turned-on state, so as to output a third power supply signal to the power supply battery; wherein the first target voltage is lower than the second target voltage.

[0017] In one embodiment, the circuit further includes a diode, a first end of the diode is connected to the adapter charging chip, and a second end of the diode is connected to the booster, for clamping the external voltage to prevent the external voltage from flowing back to the adapter charging chip.

[0018] In one embodiment, when the solar energy received by the solar charging chip is greater than a first preset threshold and the voltage of the solar charging chip is greater than a second preset threshold, the adaptive charging module is configured to output a third power supply signal to the power supply battery.

[0019] The present application also provides a method for RTC adaptive charging in an electronic device, the method being applied to the aforementioned circuit for RTC adaptive charging in an electronic device, the method comprising:

[0020] Using the adapter charging chip to control the electronic device to AC mode or DC mode based on the charging signal;

[0021] When the adapter charging chip controls the electronic device to be in AC power mode, the first power supply signal is output to the RTC through the power supply battery;

[0022] When the adapter charging chip controls the electronic device to be in direct current mode, the adaptive charging module obtains the power signal to output the second power supply signal to the RTC; wherein, the first power supply signal and the second power supply signal can enable the RTC to achieve the target function.

[0023] The present invention discloses a circuit for adaptively charging an RTC in an electronic device, which can realize adaptive charging of the RTC, enabling continuous operation. When the RTC battery is low, the electronic device does not need to replace the RTC battery, thereby improving the utilization rate of a single RTC. Furthermore, adaptive charging of the RTC can avoid the problem of the RTC occupying battery power and shortening the battery life.

[0024] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and advantages of the exemplary embodiments of the present application will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present application are shown in an illustrative and non-limiting manner, in which:

[0026] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0027] Figure 1 A schematic diagram of the structure of a circuit for RTC adaptive charging in an electronic device according to an embodiment of the present application is shown;

[0028] Figure 2 A schematic diagram of a power supply battery according to an embodiment of the present application is shown;

[0029] Figure 3 A schematic diagram of the working process of a circuit for RTC adaptive charging in an electronic device according to an embodiment of the present application is shown;

[0030] Figure 4A schematic diagram of the implementation flow of the method for RTC adaptive charging in an electronic device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0031] In order to make the purpose, features, and advantages of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0032] Figure 1 This is a schematic diagram of the structure of a circuit 10 for RTC adaptive charging in an electronic device provided in an embodiment of the present application. Figure 1 As shown, a circuit 10 for RTC adaptive charging in an electronic device includes:

[0033] The adapter charging chip 101 is used to control the electronic device to be in AC mode or DC mode based on the charging signal;

[0034] A power supply battery 102, having a first end connected to the adapter charging chip 101 and a second end connected to the real-time clock RTC, configured to output a first power supply signal to the RTC when the adapter charging chip 101 controls the electronic device to operate in AC mode;

[0035] The adaptive charging module 103 is connected to the power supply battery 102 and is used to obtain a power signal when the adapter charging chip 101 controls the electronic device to the DC power mode, so as to output a second power supply signal to the RTC; wherein the first power supply signal and the second power supply signal can enable the RTC to achieve the target function.

[0036] In an embodiment of the present application, the electronic device includes a laptop computer, a desktop computer, and other devices including an RTC. The adapter charging chip 101 is a power adapter for the electronic device, and is used to control whether the electronic device is in AC mode or DC mode based on a charging signal. Specifically, AC mode is the charging mode, and DC is the non-charging mode. When the adapter charging chip 101 of the electronic device is connected to an external power source, the charging signal indicates that the electronic device is in AC mode, and the electronic device relies on the external power source to maintain operation. A part of the voltage of the adapter charging chip 101 is directly supplied to the system voltage to ensure the normal operation of each component, and the other part is supplied to the power supply battery 102 for storage. When the adapter charging chip 101 of the electronic device is not connected to an external power source, the charging signal indicates that the electronic device is in DC mode, and the electronic device relies on the power stored in the power supply battery 102 to maintain operation.

[0037] In the examples of this application, reference Figure 2 As shown, Figure 2 This is a schematic diagram of a power supply battery 102 according to an embodiment of the present application. The power supply battery 102 can hold 0% to 100% of a charge. The capacity of the RTC is reserved within the power supply battery 102 of the electronic device. The power supply battery 102 reserves a portion of the charge space for the RTC. That is, the RTC is not powered by an external button battery, but rather by the power of the power supply battery 102 of the electronic device. The first end of the power supply battery 102 is connected to the adapter charging chip 101 and can store power when the adapter charging chip 101 controls the electronic device to AC mode. The second end of the power supply battery 102 is connected to the RTC for outputting a first power signal to the RTC. It should be noted that when the power supply battery 102 is insufficient, it can output the first power signal to the RTC when the electronic device is in AC mode. When the power supply battery 102 is sufficient, it can output the first power signal to the RTC when the electronic device is in DC mode. That is, when the power supply battery 102 has sufficient charge, the electronic device can output the first power signal to the RTC without charging. When the power supply battery 102 is insufficient, the electronic device needs to be charged before it can output the first power signal to the RTC. The adaptive charging module 103 is connected to the power supply battery 102 and can obtain a power signal when the adapter charging chip 101 controls the electronic device in direct current mode, thereby outputting a second power signal to the RTC. The first power signal and the second power signal enable the RTC to achieve its intended function, specifically, displaying the date and time.

[0038] The embodiment of the present application, through the design of the adaptive charging module 103 in the circuit, can achieve adaptive charging of the RTC, allowing it to continue to operate. When the RTC battery is low, the electronic device does not need to replace the RTC battery, thereby improving the utilization rate of a single RTC. At the same time, the adaptive charging of the RTC can also avoid the problem of the RTC occupying the power of the power supply battery 102, thereby shortening its service life.

[0039] In an optional solution, the adaptive charging module 103 is further configured to output a third power supply signal to the power supply battery 102 when the adapter charging chip 101 controls the electronic device to be in direct current mode, so as to enable the power supply battery 102 to store electricity.

[0040] In this embodiment of the present application, when the electronic device is in direct current mode, to enhance the battery life of the power supply battery 102, the adaptive charging module 103 can also output a third power supply signal to the power supply battery 102, causing the power supply battery 102 to store power. In other words, the adaptive charging module 103 can charge not only the RTC but also the power supply battery 102.

[0041] In an optional solution, the adaptive charging module 103 includes a solar receiver 1031 and a solar charging chip 1032 connected to the solar receiver 1031 , wherein the solar receiver 1031 is used to receive solar energy;

[0042] The solar charging chip 1032 is used to convert the solar energy received by the solar receiver 1031 into an electric energy signal to output a second power supply signal to the RTC or output a third power supply signal to the power supply battery 102 .

[0043] In this embodiment of the present application, the solar receiver 1031 comprises a solar panel for receiving solar energy. When the electronic device is located indoors, the solar energy received by the solar receiver 1031 comes from the brightness of indoor lighting or natural indoor brightness. The solar charging chip 1032 is connected to the solar receiver 1031. The solar energy received by the solar receiver 1031 is transmitted to the solar charging chip 1032, which converts the solar energy into an electrical energy signal, thereby outputting a second power supply signal to the RTC or a third power supply signal to the power supply battery 102. Typically, the power consumption of the central processing unit (CPU) in an electronic device to support the RTC is 8 microwatts (μW). For example, at a standard brightness of 1000 lumens for general electronic devices (approximately 2000 lumens in an office), this can generate approximately 60 μW of electrical energy. In other words, as long as there is some light source, the solar receiver 1031 and solar charging chip 1032 in the adaptive charging module 103 can generate sufficient energy to replenish the RTC or other components in the electronic device to continue operation.

[0044] In an optional solution, the adaptive charging module 103 also includes a booster 1033 connected to the solar charging chip 1032, which is used to control the electronic device circuit to boost to a target voltage based on the power signal when in the on state, so as to output a second power supply signal to the RTC or a third power supply signal to the power supply battery 102.

[0045] In the embodiment of the present application, the booster 1033 is connected to the solar charging chip 1032. When the solar charging chip 1032 outputs an electric energy signal, when the booster 1033 is in the on state, the booster 1033 can boost the current voltage of the electronic device circuit to the target voltage. Among them, the target voltage includes the target voltage required for RTC operation and the target voltage required for power supply of the power supply battery 102. It can be understood that when the voltage of the power supply battery 102 in the circuit is too low, lithium dendrites are easily formed, increasing the risk of internal short circuit, expansion or even explosion and combustion of the power supply battery 102 (when the voltage of the power supply battery 102 is lower than 1.2V, it is permanently damaged). Through the booster 1033, not only can the current voltage of the electronic device circuit be boosted to the target voltage required for RTC operation to maintain the permanent operation of the RTC, but the current voltage of the electronic device circuit can also be boosted to the target voltage required for power supply of the power supply battery 102 so that the power supply battery 102 is at least maintained at the minimum voltage required for normal operation to avoid dangers such as short circuit and expansion, and extend the service life of the power supply battery 102.

[0046] In an optional solution, the circuit 10 for RTC adaptive charging in an electronic device further includes:

[0047] The control chip 104 is connected to the booster 1033 and is used to control the booster 1033 to be in an on state or an off state, so that the booster 1033 controls the electronic device circuit to boost the voltage to a target voltage based on the power signal when in the on state.

[0048] In the embodiment of the present application, the control chip 104 is typically an embedded controller (EC) in the electronic device, connected to the booster 1033, and capable of detecting the current charge level of the power supply battery 102. When the current charge level of the power supply battery 102 is insufficient to support the normal operation of the RTC or other components of the electronic device, the EC controls the booster 1033 to be turned on. When the adapter charging chip 101 controls the electronic device to AC mode, or when the current charge level of the power supply battery 102 is sufficient to support the normal operation of the RTC or other components of the electronic device, the EC controls the booster 1033 to be turned off to prevent system leakage from affecting the startup or operation of other components.

[0049] In an optional solution, when the adapter charging chip 101 controls the electronic device to be in direct current mode and the power level of the power supply battery 102 is less than or equal to a preset power level, the adaptive charging module 103 is configured to output a second power supply signal to the RTC;

[0050] When the adapter charging chip 101 controls the electronic device to be in direct current mode and the power level of the power supply battery 102 is greater than a preset power level, the adaptive charging module 103 is configured to output a third power supply signal to the power supply battery 102 .

[0051] In this embodiment of the present application, the preset power level is the minimum power level of the power supply battery 102 required to ensure normal operation of the RTC. For example, assuming that the power supply battery 102 can only power the RTC to ensure normal operation when the power level is 30% or above, the preset power level of the power supply battery 102 is 30%. When the adapter charging chip 101 controls the electronic device in direct current (DC) mode, i.e., when the electronic device is in a non-charging state, when the power level of the power supply battery 102 is less than or equal to the preset power level, the power supply battery 102 cannot provide the power required for normal operation of the RTC. In this case, the adaptive charging module 103 receives solar energy and outputs a second power signal to the RTC to replenish the power. Similarly, when the adapter charging chip 101 controls the electronic device in DC mode, when the power level of the power supply battery 102 is greater than the preset power level, such as 40%, in order to ensure the endurance of the power supply battery 102, the adaptive charging module 103 receives solar energy and outputs a third power signal to the power supply battery 102 to replenish the power to a maximum of 100%.

[0052] In an optional solution, the target voltage includes a first target voltage and a second target voltage; when the adapter charging chip 101 controls the electronic device to be in direct current mode and the power level of the power supply battery 102 is less than or equal to a preset power level, the booster 1033 is configured to control the electronic device circuit to boost the voltage to the first target voltage based on the power signal in the turned-on state, so as to output a second power supply signal to the RTC;

[0053] When the adapter charging chip 101 controls the electronic device to be in direct current mode and the power level of the power supply battery 102 is greater than a preset power level, the booster 1033 is used to control the electronic device circuit to boost to a second target voltage based on the power signal in the turned-on state, so as to output a third power supply signal to the power supply battery 102; wherein the first target voltage is lower than the second target voltage.

[0054] In the embodiment of the present application, as described above, the first target voltage is the target voltage required when the RTC is working normally, and the second target voltage is the target voltage required when the power supply battery 102 is working normally. The first target voltage is different from the second target voltage. Specifically, the first target voltage required when the RTC is working normally is usually 12.3V, and the second target voltage required when the power supply battery 102 is working normally is usually 16.8V. The booster 1033 can control the electronic device circuit to boost to the first target voltage or the second target voltage in the turned-on state, so as to output a second power supply signal to the RTC or output a third power supply signal to the power supply battery 102 to replenish the power. Reference Figure 3As shown, when the adapter charging chip 101 controls the electronic device to operate in AC mode, the control chip 104 controls the booster 1033 to be in a closed state in AC mode, and the adaptive charging module 103 stops charging the RTC. When the adapter charging chip 101 controls the electronic device to operate in DC mode and the power level of the power supply battery 102 is less than or equal to a preset power level (assuming the preset power level is 0%), the booster 1033 controls the electronic device circuit to boost the voltage to a first target voltage and outputs a second power signal to the RTC to replenish the power. After receiving the replenished power, the RTC operates normally. When the adapter charging chip 101 controls the electronic device to operate in DC mode and the power level of the power supply battery 102 is greater than the preset power level (assuming the preset power level is 0%), the booster 1033 controls the electronic device circuit to boost the voltage to a second target voltage and outputs a third power signal to the power supply battery 102 to replenish the power. After receiving the replenished power, the battery 102's endurance is improved.

[0055] In an optional solution, the circuit 10 for RTC adaptive charging in an electronic device further includes a diode 105, a first end of the diode 105 being connected to the adapter charging chip 101, and a second end being connected to the booster 1033, for clamping the external voltage to prevent the external voltage from flowing back to the adapter charging chip 101.

[0056] In the examples of this application, reference Figure 1 As shown, the diode 105 is provided between the booster 1033 and the adapter charging chip 101, which can prevent external voltage (such as Figure 1 The system voltage in the circuit) flows back to the adapter charging chip 101, causing a short circuit or other faults, thereby ensuring the safety of the entire circuit.

[0057] In an optional solution, when the solar energy received by the solar charging chip 1032 is greater than a first preset threshold and the voltage of the solar charging chip 1032 is greater than a second preset threshold, the adaptive charging module 103 is configured to output a third power supply signal to the power supply battery 102 .

[0058] In the embodiment of the present application, when the adaptive charging module 103 outputs a third power supply signal to the power supply battery 102 to replenish power, the following conditions must be met: the solar energy received by the solar charging chip 1032 is greater than a first preset threshold, such as 0.6W (when it is less than 0.6W, the RTC is usually used to replenish power), and the voltage of the solar charging chip 1032 is greater than a second preset threshold, such as 90% of the maximum voltage of the solar charging chip 1032. The first preset threshold and the second preset threshold can also be other custom settings, and can be the same or different, but are preferably different.

[0059] In an optional solution, the circuit 10 for adaptive charging of the RTC in an electronic device further includes a voltage regulator 106; a first end of the voltage regulator 106 is connected to the power supply battery 102, and a second end is connected to the RTC, for stabilizing the voltage of the power supply battery 102 to output a first target voltage to output a first power supply signal or a second power supply signal to the RTC.

[0060] In the examples of this application, reference Figure 1 As shown, the circuit 10 for adaptively charging an RTC in an electronic device further includes a voltage regulator 106, which is located inside the power supply battery 102, with one end connected to the power supply battery 102 and the other end connected to the RTC. It will be understood that whether the RTC is powered directly by the power supply battery 102 or indirectly by the adaptive charging module 103, since the power capacity of the RTC is always built into the power supply battery 102, the first target voltage for normal operation of the RTC must be output via the power supply battery 102. When the RTC is powered directly by the power supply battery 102, the voltage regulator 106 stabilizes the voltage of the power supply battery 102 and outputs a first target voltage to output a first power supply signal to the RTC. When the RTC is powered indirectly by the adaptive charging module 103, the voltage regulator 106 stabilizes the voltage transmitted by the adaptive charging module 103 to the power supply battery 102 for the RTC and outputs a second power supply signal to the RTC. Thus, the RTC can display the time and date based on the first power supply signal or the second power supply signal.

[0061] The embodiment of the present application also provides a method for RTC adaptive charging in an electronic device, which is applied to the aforementioned circuit 10 for RTC adaptive charging in an electronic device, such as Figure 4 As shown, the method includes:

[0062] S401: Using the adapter charging chip to control the electronic device to be in AC mode or DC mode based on the charging signal.

[0063] S402: When the adapter charging chip controls the electronic device to be in an AC power mode, outputting a first power supply signal to the RTC via the power supply battery.

[0064] S403: When the adapter charging chip controls the electronic device to be in direct current mode, the adaptive charging module obtains a power signal to output a second power supply signal to the RTC; wherein the first power supply signal and the second power supply signal can enable the RTC to achieve the target function.

[0065] For the specific implementation process of steps S401 to S403 of this application, please refer to the detailed description of the adapter charging chip, power supply battery, adaptive charging module and RTC in the aforementioned relevant parts, which will not be repeated here. The scheme shown in steps S401 to S403 can realize the adaptive charging of RTC, so that it can continue to work. When the RTC power is insufficient, the electronic device does not need to replace the RTC battery with a new one, which improves the utilization rate of a single RTC. At the same time, the adaptive charging of RTC can also avoid the problem that the RTC occupies the power of the power supply battery, thereby shortening its service life.

[0066] In an optional solution, the method further includes: when the adapter charging chip controls the electronic device to be in direct current mode, outputting a third power supply signal to the power supply battery through the adaptive charging module to enable the power supply battery to store electricity.

[0067] In this application, the specific process and principle of outputting the third power supply signal to the power supply battery through the adaptive charging module can be found in the detailed description of the above-mentioned relevant parts and will not be repeated here.

[0068] In an optional solution, obtaining an electric energy signal through an adaptive charging module includes: receiving solar energy through a solar receiver in the adaptive charging module; using a solar charging chip in the adaptive charging module to convert the solar energy received by the solar receiver into an electric energy signal, so as to output a second power supply signal to the RTC or output a third power supply signal to the power supply battery.

[0069] In this application, the specific process of obtaining the power signal through the adaptive charging module to output the second power supply signal to the RTC or output the third power supply signal to the power supply battery can be found in the detailed description of the above-mentioned relevant parts and will not be repeated here.

[0070] In an optional solution, a solar charging chip in an adaptive charging module is used to convert solar energy received by a solar receiver into an electrical energy signal to output a second power supply signal to the RTC or a third power supply signal to the power supply battery, including: using a booster in the adaptive charging module to control the electronic device circuit to boost to a target voltage based on the electrical energy signal in an on state to output a second power supply signal to the RTC or a third power supply signal to the power supply battery.

[0071] In this application, for the specific description of using a booster to control the electronic device circuit to boost the voltage to the target voltage, please refer to the detailed description of the above-mentioned relevant parts and will not be repeated here.

[0072] In an optional embodiment, the method further comprises:

[0073] The booster is controlled to be in an on state or an off state by the control chip, so that the booster controls the electronic device circuit to boost the voltage to the target voltage based on the power signal when in the on state.

[0074] In this application, the specific description of the control chip can be found in the detailed description of the relevant parts mentioned above and will not be repeated here.

[0075] In an alternative approach,

[0076] When the adapter charging chip controls the electronic device to be in direct current mode and the power of the power supply battery is less than or equal to the preset power, the adaptive charging module outputs a second power supply signal to the RTC;

[0077] When the adapter charging chip controls the electronic device to be in direct current mode and the power of the power supply battery is greater than the preset power, the third power supply signal is output to the power supply battery through the adaptive charging module.

[0078] In this application, for the specific description of outputting the second power supply signal to the RTC through the adaptive charging module and outputting the third power supply signal to the power supply battery through the adaptive charging module, please refer to the detailed description of the above-mentioned relevant parts and will not be repeated here.

[0079] In an optional solution, the target voltage includes a first target voltage and a second target voltage; using a booster in the adaptive charging module to control the electronic device circuit to boost to the target voltage based on the power signal in the turned-on state, so as to output a second power supply signal to the RTC or a third power supply signal to the power supply battery, including: when the adapter charging chip controls the electronic device to be in a DC power mode and the power of the power supply battery is less than or equal to a preset power, using the booster to control the electronic device circuit to boost to the first target voltage based on the power signal in the turned-on state, so as to output the second power supply signal to the RTC;

[0080] When the adapter charging chip controls the electronic device to be in direct current mode and the power of the power supply battery is greater than a preset power, the booster is used to control the electronic device circuit to boost to a second target voltage based on the power signal in the turned-on state to output a third power supply signal to the power supply battery; wherein the first target voltage is lower than the second target voltage.

[0081] In this application, for the specific description of using the booster to control the electronic device circuit to boost the voltage to the first target voltage or the second target voltage in the turned-on state, please refer to the detailed description of the relevant parts mentioned above and will not be repeated here.

[0082] In an optional solution, the method further includes: clamping the external voltage by a diode to prevent the external voltage from flowing back to the adapter charging chip.

[0083] In this application, the specific description of the diode can be found in the detailed description of the related parts mentioned above and will not be repeated here.

[0084] In an optional solution, when the solar energy received by the solar charging chip is greater than a first preset threshold and the voltage of the solar charging chip is greater than a second preset threshold, the adaptive charging module is used to output a third power supply signal to the power supply battery.

[0085] In this application, the relevant descriptions of the first preset threshold and the second preset threshold are as mentioned above and will not be repeated here.

[0086] In an optional solution, the method further includes: utilizing a voltage stabilizer to output a voltage of the power supply battery as a first target voltage, so as to output a first power supply signal or a second power supply signal to the RTC.

[0087] In this application, the relevant description of the voltage stabilizer can be found above and will not be repeated here.

[0088] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this application can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this application can be achieved. This is not a limitation herein.

[0089] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0090] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A circuit for RTC adaptive charging in electronic equipment, characterized in that: The circuit comprises: The adapter charging chip is used to control the electronic device to operate in AC or DC mode based on the charging signal; a power supply battery, a first end of which is connected to the adapter charging chip, and a second end of which is connected to a real-time clock (RTC), and configured to output a first power supply signal to the RTC when the adapter charging chip controls the electronic device to be in an AC power mode; An adaptive charging module is connected to the power supply battery and is used to obtain a power signal when the adapter charging chip controls the electronic device to a direct current mode, so as to output a second power supply signal to the RTC; wherein the first power supply signal and the second power supply signal can enable the RTC to achieve the target function.

2. The circuit for RTC adaptive charging in electronic equipment according to claim 1, characterized in that: The adaptive charging module is further configured to output a third power supply signal to the power supply battery when the adapter charging chip controls the electronic device to be in direct current mode, so as to enable the power supply battery to store electricity.

3. The circuit for RTC adaptive charging in electronic equipment according to claim 2, characterized in that: The adaptive charging module includes a solar receiver and a solar charging chip connected to the solar receiver, wherein the solar receiver is used to receive solar energy; The solar charging chip is used to convert the solar energy received by the solar receiver into an electric energy signal to output a second power supply signal to the RTC or output a third power supply signal to the power supply battery.

4. The circuit for RTC adaptive charging in electronic equipment according to claim 3, characterized in that: The adaptive charging module also includes a booster connected to the solar charging chip, which is used to control the electronic device circuit to boost the voltage to a target voltage based on the power signal when in the turned-on state, so as to output a second power supply signal to the RTC or a third power supply signal to the power supply battery.

5. The circuit for RTC adaptive charging in electronic equipment according to claim 4, characterized in that: The circuit further comprises: The control chip is connected to the booster and is used to control the booster to be in an on state or an off state, so that the booster controls the electronic device circuit to boost the voltage to a target voltage based on the power signal when in the on state.

6. The circuit for RTC adaptive charging in electronic equipment according to any one of claims 2 to 5, characterized in that: When the adapter charging chip controls the electronic device to be in direct current mode and the power of the power supply battery is less than or equal to the preset power, the adaptive charging module is used to output a second power supply signal to the RTC; When the adapter charging chip controls the electronic device to be in direct current mode and the power of the power supply battery is greater than a preset power, the adaptive charging module is used to output a third power supply signal to the power supply battery.

7. The circuit for RTC adaptive charging in electronic equipment according to claim 4 or 5, characterized in that: The target voltage includes a first target voltage and a second target voltage; when the adapter charging chip controls the electronic device to be in direct current mode and the power of the power supply battery is less than or equal to the preset power, the booster is used to control the electronic device circuit to boost the voltage to the first target voltage based on the power signal in the turned-on state, so as to output a second power supply signal to the RTC; When the adapter charging chip controls the electronic device to be in direct current mode and the power of the power supply battery is greater than a preset power, the booster is used to control the electronic device circuit to boost to a second target voltage based on the power signal in the turned-on state, so as to output a third power supply signal to the power supply battery; wherein the first target voltage is lower than the second target voltage.

8. The circuit for RTC adaptive charging in electronic equipment according to claim 4 or 5, characterized in that: The circuit further includes a diode, a first end of which is connected to the adapter charging chip, and a second end of which is connected to the booster, for clamping the external voltage to prevent the external voltage from flowing back to the adapter charging chip.

9. The circuit for RTC adaptive charging in electronic equipment according to claim 3, characterized in that: When the solar energy received by the solar charging chip is greater than a first preset threshold, and the voltage of the solar charging chip is greater than a second preset threshold, the adaptive charging module is used to output a third power supply signal to the power supply battery.

10. A method for RTC adaptive charging in an electronic device, characterized in that: The method is applied to the circuit for RTC adaptive charging in an electronic device according to any one of claims 1 to 9, and the method includes: Using the adapter charging chip to control the electronic device to AC mode or DC mode based on the charging signal; When the adapter charging chip controls the electronic device to be in AC power mode, the first power supply signal is output to the RTC through the power supply battery; When the adapter charging chip controls the electronic device to be in direct current mode, the adaptive charging module obtains the power signal to output the second power supply signal to the RTC; wherein, the first power supply signal and the second power supply signal can enable the RTC to achieve the target function.

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