Charging circuit and electronic equipment

Abstract

The utility model discloses a charging circuit and electronic equipment, and relates to the field of electronic design. The charging circuit is arranged in the electronic equipment body and comprises a charging module; the power supply control module is electrically connected with the charging module; the boosting unit is electrically connected with the power supply control module; and the energy storage unit is electrically connected between the boosting unit and the system voltage of the electronic equipment, and the electric energy stored by the energy storage unit can be released to the boosting unit, so that the voltage output to the power supply control module by the boosting unit is boosted. Therefore, the energy storage unit can store electric energy by using the system voltage and release the stored electric energy to the boosting unit, so that the voltage output to the power supply control module by the boosting unit is boosted, and the difference between the voltage subsequently output by the power supply control module and the charging standard of a power utilization module or a battery module in the electronic equipment can be reduced.

Description

Technical Field

[0001] The present application belongs to the field of device electronic design, and specifically relates to a charging circuit and an electronic device. Background Art

[0002] Currently, many electronic devices used in daily life need to be charged. However, when charging electronic devices, the voltage received by the power module or battery module in the device often deviates greatly from the normal charging standard of the power module and the power module. Utility Model Content

[0003] The present application aims to solve the problem that when an electronic device is charging, the voltage received by a power module or a power module in the device cannot reach a normal charging standard, and provides a charging circuit and an electronic device.

[0004] A first aspect of an embodiment of the present application provides a charging circuit, wherein the charging circuit is disposed in an electronic device body, and the charging circuit includes:

[0005] Charging module;

[0006] A power control module, the power control module is electrically connected to the charging module;

[0007] A boost unit, the boost unit is electrically connected to the power control module;

[0008] An energy storage unit is electrically connected between the boost unit and the system voltage of the electronic device. The electric energy stored in the energy storage unit can be released to the boost unit, so that the voltage output by the boost unit to the power control module increases.

[0009] A second aspect of an embodiment of the present application provides an electronic device, including:

[0010] Electronic device body;

[0011] As provided in the first aspect of the embodiment of the present application, the charging circuit is disposed in the electronic device body.

[0012] In an embodiment of the present application, a charging circuit disposed in the electronic device body includes a charging module and a power control module. The charging module inputs external electric energy into the power control module, and the power control module manages, distributes and outputs the received electric energy for a second time. The charging circuit also includes a boost unit and an energy storage unit for boosting. The boost unit is electrically connected to the power control module, and the energy storage unit is electrically connected between the boost unit and the system voltage of the electronic device. The energy storage unit can use the system voltage to store electric energy and release the stored electric energy to the boost unit, resulting in an increase in the voltage output by the boost unit to the power control module, so that the gap between the voltage subsequently output by the power control module and the charging standard of the power module or battery module in the electronic device can be narrowed.

[0013] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 is a structural block diagram of an embodiment of a charging circuit provided by the present application;

[0016] Figure 2 is a circuit schematic diagram of a power control module in an embodiment of a charging circuit provided in the present application;

[0017] Figure 3 is a circuit schematic diagram of a boost unit, an energy storage unit, and a boost control unit in an embodiment of a charging circuit provided by the present application;

[0018] Figure 4 It is a circuit schematic diagram of a charging protection module in an embodiment of a charging circuit provided in the present application. DETAILED DESCRIPTION

[0019] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0020] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0021] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] See also Figure 1 , the charging circuit includes:

[0024] Charging module 100;

[0025] A power control module 200, the power control module 200 is electrically connected to the charging module 100;

[0026] A boost unit 300, the boost unit 300 is electrically connected to the power control module 200;

[0027] The energy storage unit 400 is electrically connected between the boost unit 300 and the system voltage of the electronic device. The electric energy stored in the energy storage unit 400 can be released to the boost unit 300, so that the voltage output by the boost unit 300 to the power control module 200 is increased.

[0028] The charging module 100 is connected to an external charging power source and is electrically connected to the power control module 200 through the charging port of the power control module 200, inputting the external input electric energy into the power control module 200, and the power control module 200 then manages and distributes the received electric energy among various power consumption modules or battery modules.

[0029] Specifically, the electronic device is an earphone device, including an earphone charging compartment and earphones, the charging circuit is arranged in the earphone charging compartment body, and the external power source charges the earphone charging compartment through the charging module 100, and the charging module 100 may include a Type-C interface. The charging module 100 inputs electric energy to the power control module 200 through an electrical connection with the power control module 200, and the power control module 200 may distribute the received electric energy to the battery module or various power modules in the electronic device.

[0030] For example, see Figure 2 The power control module 200 is electrically connected to the charging module 100 through its charging port USB_VBUS, and connected to the battery module through the battery port BAT. The power control module 200 distributes the power received through the charging port USB_VBUS to the battery module through the battery port BAT to charge the battery module. When the earphone needs to be charged, the battery module provides power to the power control module 200 through the battery port BAT, and the power control module 200 then inputs the power to the earphone battery module set in the earphone to charge the earphone.

[0031] The boost unit 300 is electrically connected to the power control module 200, and the energy storage unit 400 is electrically connected between the boost unit 300 and the system voltage of the electronic device. The energy storage unit 400 can use the system voltage to store electric energy and release the stored electric energy to the boost unit 300, so that the voltage output by the boost unit 300 to the power control module 200 is increased, so that the difference between the voltage subsequently output by the power control module and the charging standard of the power module or battery module in the electronic device can be reduced.

[0032] In some embodiments, the charging circuit further comprises:

[0033] The boost control unit 500 is electrically connected between the energy storage unit 400 and the boost unit 300, and is used to control the energy storage unit 400 to store or release electric energy.

[0034] The boost control unit 500 is electrically connected between the energy storage unit 400 and the boost unit 300, and is used to control when the energy storage unit 400 stores and releases electrical energy. That is, when the boost control unit 500 is working, it can increase the voltage output by the boost unit 300 to the power control module 200.

[0035] In some embodiments, the boost control unit 500 includes:

[0036] Feedback port;

[0037] An output port, the output port is electrically connected to the power control module 200;

[0038] The boost unit 300 is electrically connected to both the feedback port and the output port. When the electric energy stored in the energy storage unit 400 is released to the boost unit 300, the voltage difference between the output port and the feedback port increases.

[0039] The boost control unit 500 further includes:

[0040] Control port;

[0041] The switch element is electrically connected between the control port and the feedback port. The energy storage unit 400 is electrically connected to the switch element through the control port. The switch element is used to control the energy storage unit 400 to store or release electric energy.

[0042] The boost control unit 500 includes a feedback port and an output port, both of which are electrically connected to the boost unit 300, and the output port is also electrically connected to the power control module 200. After the electric energy of the energy storage unit 400 is released to the boost unit 300, the voltage difference between the output port and the feedback port increases, that is, the voltage output from the boost unit 300 connected to the output port to the power control module 200 increases.

[0043] The switch element in the boost control unit 500 is responsible for controlling the energy storage or energy release of the energy storage unit 400, and is electrically connected between the control port and the feedback port, and is electrically connected to the energy storage unit 400 through the control port. In a possible implementation, when the switch element conducts the feedback port and the control port, current can continuously flow through the energy storage unit 400, so that the energy storage unit 400 continuously stores energy; when the switch element does not conduct the feedback port and the control port, the energy storage unit 400 starts to release energy to the boost unit 300.

[0044] Specifically, see Figure 3, the boost control unit 500 is a control chip U5, and the specifications of the control chip U5 can be adaptively selected according to the design requirements. The feedback port FB and the output port OUT of the boost control unit 500 are both electrically connected to the boost power supply, and the output port OUT is also electrically connected to the power control module 200 through the PMID port of the power control module 200. When electric energy is input from the charging port USB_VBUS of the power control module 200, because the boost control unit 500 is electrically connected to the power control module 200, there will be voltage on the output port OUT and the feedback port FB of the boost control unit 500. The energy storage unit 400 is electrically connected to the system voltage through the system voltage port VSYS. When the switch element turns on the control port SW and the feedback port FB, the energy storage unit 400 stores electric energy. When the switch element does not turn on the control port SW and the feedback port FB, the electric energy is released to the boost unit 300. When the electric energy of the energy storage unit 400 is released to the boost unit 300, since the boost unit 300 is electrically connected between the output port OUT and the feedback port FB, the voltage difference between the feedback port FB and the output port OUT increases, so that the voltage output from the boost unit 300 connected to the output port OUT to the power control module 200 increases, completing the boost process in the charging process.

[0045] Specifically, the switch element is a triode or a metal-oxide-semiconductor field-effect transistor (MOSFET).

[0046] In some embodiments, the boost unit 300 includes:

[0047] A first connection port, the first connection port is electrically connected to the output port;

[0048] a second connection port, the second connection port being electrically connected to the feedback port;

[0049] A capacitor connected between the first connection port and the second connection port;

[0050] A first resistance unit, the first resistance unit is connected in parallel with the capacitor;

[0051] The second resistance unit is connected between the first resistance unit and the grounding point of the charging circuit.

[0052] The boost unit 300 uses a capacitor as the object for charging the energy storage unit 400. The capacitor is connected between the first connection port and the second connection port of the boost unit 300, and the first connection port and the second connection port are electrically connected to the output port and the feedback port respectively. The capacitor is also connected in parallel to the first resistance power supply, and the first resistance unit is also connected in series with the first resistance unit, and the other end of the first resistance unit is grounded. The resistance network formed by the first resistance unit and the first resistance unit has a voltage dividing function. The designer can determine the specific voltage value output by the boost unit 300 to the power control module 200 by determining the specific resistance values ​​of the first resistance unit and the first resistance unit.

[0053] Specifically, see Figure 3 , the capacitor is capacitor C21, the first resistor unit includes resistor R62, and the first resistor unit includes two resistors R63 and R64 connected in series. When the energy storage unit 400 releases electric energy, it charges the capacitor C21, so that the voltage difference between the two ends of the capacitor C21 increases. Due to the voltage dividing function of the first resistor unit and the first resistor unit, the voltage V at the output port OUT OUT (i.e., the voltage outputted from the boost unit 300 to the power control module 200) and the voltage V at the feedback port FB FB Has a relationship as expressed by the following formula:

[0054]

[0055] Among them, V FB The measurement may be performed when the charging module 100 is charging and the boost control unit 500 is not operating.

[0056] Designers can use formula (1) to determine the specific resistance values ​​of R62, R63 and R64 to determine the specific voltage value V output by the boost unit 300 to the power control module 200. OUT , or according to the design requirements, the voltage value V that the boost unit 300 needs to output to the power control module 200 OUT (V that can meet the charging standard of the power module or battery module in the electronic device OUT ) can be used to infer the specific resistance values ​​of R62, R63 and R64 for circuit design.

[0057] In some embodiments, the energy storage unit 400 includes an inductive element.

[0058] Based on this, the current holding characteristics of the inductor element are utilized to realize the storage and release of electric energy.

[0059] Specifically, see Figure 3, the inductor element is the inductor L12. When the switch element 510 conducts the control port SW and the feedback port FB, the inductor L12 has a current flow, so it stores electric energy. When the switch element does not conduct the control port SW and the feedback port FB, due to its current holding characteristics, the stored electric energy is released to the capacitor C21. After the electric energy of the inductor L12 is released to the capacitor C21, because the capacitor C21 is electrically connected between the output port OUT and the feedback port FB, the voltage difference between the feedback port FB and the output port OUT increases, so that the voltage output from the boost unit 300 connected to the output port OUT to the power control module 200 increases, completing the boost process in the charging process.

[0060] In some embodiments, the charging circuit further comprises:

[0061] The main control module 600 is in communication with the boost control unit 500 and is used to instruct the boost control unit 500 to control the energy storage unit 400 to store or release electric energy.

[0062] The charging circuit may further include a main control module 600 (not shown in the figure), which may perform work control of each power-consuming module in the entire circuit and power monitoring of each power-consuming module. The main control module 600 is in communication with the boost control unit 500 and may send a work instruction to the boost control unit 500 to instruct the boost control unit 500 to start working so as to complete the boost process during the charging process.

[0063] Specifically, the main control module 600 may be a microcontroller unit (MCU), see Figure 3 The boost control unit 500 includes an enable port EN for communicating with the main control module 600. The main control module 600 sends a working instruction to the boost control unit 500, instructing the boost unit 300 to start working, that is, to start controlling the energy storage unit 400 to store or release electric energy.

[0064] In some embodiments, the charging circuit further comprises:

[0065] The charging protection module 700 is electrically connected between the charging module 100 and the power control module 200, and controls the current input from the charging module 100 to the power control module 200 to not exceed a first preset threshold.

[0066] Based on this, the charging protection module 700 connected between the charging module 100 and the power control module 200 is used to perform overvoltage / overcurrent protection on the power control module 200, that is, the current input from the charging module 100 to the power control module 200 is controlled not to exceed the first preset threshold. Specifically, the first preset threshold can be adaptively selected according to the safety design requirements of the circuit, and the circuit parameters of the charging protection module 700 are designed according to the selected first preset threshold.

[0067] In some embodiments, the charging circuit further comprises:

[0068] Power consumption module;

[0069] A battery module, the battery module is electrically connected to the power control module 200;

[0070] The charging protection module 700 includes:

[0071] A first protection unit 710, the first protection unit 710 is electrically connected between the charging module 100 and the power control module 200, and controls the current input from the charging module 100 to the power control module 200 to not exceed a second preset threshold;

[0072] The second protection unit 720 is electrically connected between the charging module 100 and the power module, and controls the current input from the charging module 100 to the power module not to exceed a third preset threshold.

[0073] In the case where the power control module 200 is only responsible for the charging management of the battery module, the charging protection module 700 may include two protection units, namely, a first protection unit 710 and a second protection unit 720. The first protection unit 710 is electrically connected between the charging module 100 and the power control module 200, and is used for overvoltage / overcurrent protection of the power control module 200 and the battery module, that is, to control the current magnitude of the charging module 100 input to the power control module 200 not to exceed the second preset threshold value; while the overvoltage / overcurrent protection of other power modules during the charging process is completed by the second protection unit 720, and the second protection unit 720 is electrically connected between the charging module 100 and the power module, and controls the current magnitude of the charging module 100 input to the power module not to exceed the third preset threshold value. Specifically, the second preset threshold value and the third preset threshold value can be adaptively selected according to the safety design requirements of the circuit, and the circuit parameters of the charging protection module 700 are designed according to the selected second preset threshold value and the third preset threshold value.

[0074] Specifically, the electronic device is a headset device, including a headset charging compartment and a headset, the charging circuit is arranged in the headset charging compartment body, the external power source charges the battery module in the headset charging compartment through the charging module 100 and the power control module 200, and the external module simultaneously charges the Bluetooth adapter module (i.e., the power module) through the charging module 100. The first protection unit 710 is used for overvoltage / overcurrent protection of the power control module 200 and the battery module, and the second protection unit 720 is used for overvoltage / overcurrent protection of the Bluetooth adapter module.

[0075] Specifically, see Figure 4 , the first protection unit 710 and the second protection unit 720 both include an overvoltage / overcurrent protection chip U3, U6, and U3, U6 can be a P14C1N chip. In a possible implementation, taking U3 as an example, the IN port of U3 is connected to the input end of the charging module 100, that is, connected to the path of the current or voltage to be monitored, the OUT port of U3 is connected to the charging port USB_VBUS of the power control module 200, and is used to input current to the power control module 200, and the ILIM port of U3 is used to set or adjust the triggering second preset threshold of the overcurrent protection to determine when to trigger the protection. The second preset threshold depends on the parameter values ​​of the resistor R1, the resistor R10 and the capacitor C8 connected to the ILIM port, so the resistor R1, the resistor R10 can be designed according to the design requirements of the second preset threshold. And the parameter design of capacitor C8; taking U6 as an example, the IN port of U6 is connected to the input end of the charging module 100, that is, connected to the path of the current or voltage that needs to be monitored, the OUT port of U6 is connected to the charging port BT_VBUS of the Bluetooth adapter module, and is used to input current to the Bluetooth adapter module. The ILIM port of U6 is used to set or adjust the triggering third preset threshold of the overcurrent protection to determine when to trigger the protection. The third preset threshold depends on the parameter values ​​of the resistor R53 and the capacitor C31 connected to the ILIM port, so the parameters of the resistor R53 and the capacitor C31 can be designed according to the design requirements of the third preset threshold.

[0076] Specifically, filter capacitors C3 and C15 are connected between the IN port of U3 and the grounding point, and filter capacitors C33 and C34 are connected between the IN port of U3 and the grounding point.

[0077] A second aspect of an embodiment of the present application provides an electronic device, including:

[0078] Electronic device body;

[0079] The charging circuit provided in the first aspect of the embodiment of the present application is arranged in the body of the electronic device.

[0080] In some embodiments, the electronic device comprises:

[0081] Headphone charging case;

[0082] Earphones: When the earphones are stored in the earphone charging compartment, they can be charged through the earphone charging compartment.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0084] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A charging circuit, characterized in that: The charging circuit is arranged in the electronic device body, and the charging circuit comprises: Charging module; A power control module, the power control module is electrically connected to the charging module; A boost unit, the boost unit is electrically connected to the power control module; An energy storage unit is electrically connected between the boost unit and the system voltage of the electronic device. The electric energy stored in the energy storage unit can be released to the boost unit, so that the voltage output by the boost unit to the power control module increases.

2. The charging circuit according to claim 1, characterized in that: The charging circuit further comprises: A boost control unit, the boost control unit is electrically connected between the energy storage unit and the boost unit, and is used to control the energy storage unit to store or release electrical energy.

3. The charging circuit according to claim 2, characterized in that: The boost control unit comprises: Feedback port; an output port, the output port being electrically connected to the power control module; The boost unit is electrically connected to the feedback port and the output port, so that when the electric energy stored in the energy storage unit is released to the boost unit, the voltage difference between the output port and the feedback port increases; The boost control unit further includes: Control port; A switch element, wherein the switch element is electrically connected between the control port and the feedback port, the energy storage unit is electrically connected to the switch element via the control port, and the switch element is used to control the energy storage unit to store or release electrical energy.

4. The charging circuit according to claim 3, characterized in that: The boost unit comprises: a first connection port, the first connection port being electrically connected to the output port; a second connection port, the second connection port being electrically connected to the feedback port; a capacitor connected between the first connection port and the second connection port; A first resistance unit, wherein the first resistance unit is connected in parallel with the capacitor; A second resistance unit is connected between the first resistance unit and a ground point of the charging circuit.

5. The charging circuit according to claim 2, characterized in that: The charging circuit further comprises: A main control module is connected in communication with the boost control unit and is used to instruct the boost control unit to control the energy storage unit to store or release electric energy.

6. The charging circuit according to claim 1, characterized in that: The energy storage unit includes an inductor element.

7. The charging circuit according to claim 1, characterized in that: The charging circuit further comprises: A charging protection module, the charging protection module is electrically connected between the charging module and the power control module, and is used to control the current input from the charging module to the power control module to not exceed a first preset threshold.

8. The charging circuit according to claim 7, characterized in that: The charging circuit further comprises: Power consumption module; a battery module, the battery module being electrically connected to the power control module; The charging protection module comprises: A first protection unit, the first protection unit is electrically connected between the charging module and the power control module, and is used to control the current input from the charging module to the power control module to not exceed a second preset threshold; The second protection unit is electrically connected between the charging module and the power module, and is used to control the current input from the charging module to the power module not to exceed a third preset threshold.

9. An electronic device, characterized in that: include: Electronic device body; The charging circuit according to any one of claims 1 to 8, wherein the charging circuit is disposed in the electronic device body.

10. The electronic device according to claim 9, characterized in that: The electronic device comprises: Headphone charging case; The earphones can be charged through the earphone charging compartment when the earphones are stored in the earphone charging compartment.

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