Charging circuit, charging module and electronic device

Abstract

The present disclosure provides a charging circuit, a charging module and an electronic device. The charging circuit includes a transformer module and an absorption module; the absorption module includes a first absorption branch, a second absorption branch, a first discharge branch and a freewheeling branch; the first end of the first absorption branch is electrically connected to the first end of the primary winding of the transformer module, and the second end of the first absorption branch is electrically connected to the first end of the freewheeling branch; the first end of the second absorption branch is electrically connected to the first end of the primary winding of the transformer module, and the second end of the first absorption branch is electrically connected to the first end of the freewheeling branch; the first end of the first discharge branch is electrically connected to the first end of the primary winding of the transformer module, and the second end of the first discharge branch is electrically connected to the first end of the freewheeling branch; the second end of the freewheeling branch is electrically connected to the second end of the primary winding of the transformer module. This embodiment can maintain the function of absorbing noise after the first absorption branch or the second absorption branch is damaged, thereby improving the reliability of the absorption module.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a charging circuit, a charging module and an electronic device. Background Art

[0002] With the development of fast charging technology, the power of charging circuits is getting higher and higher. At this time, higher requirements are placed on the tolerance of devices in charging circuits. For example, the operating frequency of charging circuits is getting higher and higher. When the devices in charging circuits operate at higher operating frequencies, they need to withstand higher voltage stress and also generate greater noise.

[0003] In the related art, an absorption circuit is usually provided to solve the noise of the charging circuit. When the absorption circuit is damaged, the use of the charging circuit will be affected. Utility Model Content

[0004] The present disclosure provides a charging circuit, a charging module and an electronic device to solve the above technical problems.

[0005] According to a first aspect of the present disclosure, a charging circuit is provided, comprising a transformer module and an absorption module; the absorption module comprises a first absorption branch, a second absorption branch, a first discharge branch and a freewheeling branch;

[0006] The first end of the first absorption branch is electrically connected to the first end of the primary winding of the transformer module, and the second end of the first absorption branch is electrically connected to the first end of the freewheeling branch;

[0007] The first end of the second absorption branch is electrically connected to the first end of the primary winding of the transformer module, and the second end of the first absorption branch is electrically connected to the first end of the freewheeling branch;

[0008] The first end of the first discharge branch is electrically connected to the first end of the primary winding of the transformer module, and the second end of the first discharge branch is electrically connected to the first end of the freewheeling branch;

[0009] The second end of the freewheeling branch is electrically connected to the second end of the primary winding of the transformer module.

[0010] Optionally, the first discharge branch includes at least two resistors connected in series, one end of the at least two resistors is electrically connected to the first end of the primary winding of the transformer module, and the other end of the at least two resistors is electrically connected to the first end of the freewheeling branch.

[0011] Optionally, the at least two resistors include a first resistor and a second resistor; the first end of the first resistor is electrically connected to the first end of the primary winding of the transformer module, and the second end of the first resistor is electrically connected to the first end of the second resistor; the second end of the second resistor is electrically connected to the first end of the freewheeling branch.

[0012] Optionally, the first absorption branch includes at least one capacitor and at least one resistor; the at least one capacitor is arranged in series, the at least one resistor is arranged in series, and the at least one capacitor and the at least one resistor are arranged in series;

[0013] One end of the at least one capacitor and the at least one resistor connected in series is electrically connected to the first end of the primary winding of the transformer module, and the other end of the at least one capacitor and the at least one resistor connected in series is electrically connected to the first end of the freewheeling branch.

[0014] Optionally, the at least one capacitor includes a first capacitor, and the at least one resistor includes a third resistor;

[0015] The first end of the first capacitor is electrically connected to the first end of the primary winding of the transformer module, the second end of the first capacitor is electrically connected to the first end of the third resistor; the second end of the third resistor is electrically connected to the first end of the freewheeling branch.

[0016] Optionally, the second absorption branch includes at least one capacitor and at least one resistor; the at least one capacitor is arranged in series, the at least one resistor is arranged in series, and the at least one capacitor and the at least one resistor are arranged in series;

[0017] One end of the at least one capacitor and the at least one resistor connected in series is electrically connected to the first end of the primary winding of the transformer module, and the other end of the at least one capacitor and the at least one resistor connected in series is electrically connected to the first end of the freewheeling branch.

[0018] Optionally, the at least one capacitor includes a second capacitor, and the at least one resistor includes a fourth resistor;

[0019] The first end of the second capacitor is electrically connected to the first end of the primary winding of the transformer module, the second end of the second capacitor is electrically connected to the first end of the fourth resistor; the second end of the fourth resistor is electrically connected to the first end of the freewheeling branch.

[0020] Optionally, the absorption module further includes a second discharge branch; a first end of the second discharge branch is electrically connected to a first end of a primary winding of the transformer module, and a second end of the second discharge branch is electrically connected to a first end of the freewheeling branch.

[0021] Optionally, the second discharge branch includes at least two resistors connected in series, one end of the at least two resistors is electrically connected to the first end of the primary winding of the transformer module, and the other end of the at least two resistors is electrically connected to the first end of the freewheeling branch.

[0022] Optionally, the at least two resistors include a fifth resistor and a sixth resistor; the first end of the fifth resistor is electrically connected to the first end of the primary winding of the transformer module, and the second end of the fifth resistor is electrically connected to the first end of the sixth resistor; the second end of the sixth resistor is electrically connected to the first end of the freewheeling branch.

[0023] Optionally, the first capacitor and / or the second capacitor are implemented using NPO capacitors.

[0024] Optionally, it further comprises a switch module, wherein a first end of the switch module is electrically connected to the transformer module and the absorption module respectively;

[0025] The switch module is used to release the charges stored in the transformer module and the absorption module when switched to a conducting state.

[0026] According to a second aspect of the present disclosure, a charging module is provided, wherein the charging module comprises a charging circuit as described in any one of the first aspect.

[0027] According to a third aspect of the present disclosure, an electronic device is provided, the electronic device comprising the charging circuit as described in any one of the first aspect and / or the charging module as described in the second aspect.

[0028] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0029] The charging circuit provided in this embodiment includes a transformer module and an absorption module; the absorption module includes a first absorption branch, a second absorption branch, a first discharge branch and a freewheeling branch; the first end of the first absorption branch is electrically connected to the first end of the primary winding of the transformer module, and the second end of the first absorption branch is electrically connected to the first end of the freewheeling branch; the first end of the second absorption branch is electrically connected to the first end of the primary winding of the transformer module, and the second end of the first absorption branch is electrically connected to the first end of the freewheeling branch; the first end of the first discharge branch is electrically connected to the first end of the primary winding of the transformer module, and the second end of the first discharge branch is electrically connected to the first end of the freewheeling branch; the second end of the freewheeling branch is electrically connected to the second end of the primary winding of the transformer module. In this way, the first absorption branch, the first discharge branch and the freewheeling branch can constitute an absorption filter structure, and / or the second absorption branch, the first discharge branch and the freewheeling branch can constitute an absorption filter structure, which can maintain the function of absorbing noise after the first absorption branch or the second absorption branch is damaged, thereby improving the reliability of the absorption module.

[0030] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The figure is a block diagram of a charging circuit according to an embodiment of the present disclosure.

[0032] Figure 2 The present invention is a circuit diagram of a filter module according to an embodiment of the present invention.

[0033] Figure 3 The figure is a block diagram of an absorption module according to an embodiment of the present disclosure.

[0034] Figure 4 The present invention is a circuit diagram of an absorption module according to an embodiment of the present invention.

[0035] Figure 5 A block diagram of another absorption module according to an embodiment of the present disclosure.

[0036] Figure 6 The figure is a circuit diagram of a charging circuit according to an embodiment of the present disclosure.

[0037] Figure 7 The present invention is a block diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] 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 consistent with some aspects of the present disclosure as detailed in the appended claims.

[0039] In order to solve the above technical problems, the embodiments of the present disclosure provide a charging circuit, a charging module and an electronic device. The above charging circuit and / or charging module can be applied to the electronic device. Figure 1 FIG. 1 is a schematic diagram of a charging circuit according to an embodiment of the present disclosure. Figure 1 , a charging circuit includes a rectifier module 11, a filter module 12, an absorption module 13 and a transformer module 14.

[0040] In one embodiment, the rectifier module 11 can be implemented using a half-bridge rectifier circuit, a full-bridge rectifier circuit or other rectifier circuits. If the AC voltage can be converted into a DC voltage, the corresponding solution falls within the protection scope of the present disclosure.

[0041] In one embodiment, the filter module 12 can be implemented by at least one capacitor, RC filter, LC filter, or RLC filter. In one example, the filter module 12 is implemented by a π-type LC filter.

[0042] See also Figure 2 The filter module 12 includes a capacitor CE1, a capacitor CE2, a capacitor CE3 and an inductor L1. The first end of the capacitor CE1 is electrically connected to the first end of the capacitor CE2 and the first end of the inductor L1 respectively, the second end of the capacitor CE1 is grounded, and the second end of the capacitor CE2 is grounded. The second end of the inductor L1 is electrically connected to the first end of the capacitor CE3, the absorption module 13 and the transformer module 14 respectively, and the second end of the capacitor CE3 is grounded.

[0043] In one embodiment, see Figure 3 The absorption module 13 includes a first absorption branch 131 , a second absorption branch 132 , a first discharge branch 133 and a freewheeling branch 134 .

[0044] A first end of the first absorption branch 131 is electrically connected to a first end of the primary winding of the transformer module 14, and a second end of the first absorption branch 131 is electrically connected to a first end of the freewheeling branch 134;

[0045] The first end of the second absorption branch 132 is electrically connected to the first end of the primary winding of the transformer module 14, and the second end of the first absorption branch 131 is electrically connected to the first end of the freewheeling branch 134;

[0046] A first end of the first discharge branch 133 is electrically connected to a first end of the primary winding of the transformer module 14, and a second end of the first discharge branch 133 is electrically connected to a first end of the freewheeling branch 134;

[0047] The second end of the freewheeling branch 134 is electrically connected to the second end of the primary winding of the transformer module 14 .

[0048] In one embodiment, the first discharge branch 133 includes at least two resistors connected in series, and the at least two resistors include two ends after being connected in series in sequence, one end of the at least two resistors is electrically connected to the first end of the primary winding of the transformer module 14, and the other end of the at least two resistors is electrically connected to the first end of the freewheeling branch 134. In addition, the second end of the freewheeling branch 134 is electrically connected to the second end of the primary winding of the transformer module 14. That is, the branch after the at least two resistors are connected in series continues to be connected in series with the freewheeling branch 134, to obtain a series branch including the freewheeling branch 134 and at least two resistors, and this series branch is then connected in parallel with the primary winding of the transformer module 14.

[0049] In one embodiment, see Figure 4 , the at least two resistors of the first discharge branch 133 include a first resistor R1 and a second resistor R2; a first end of the first resistor R1 and a first end of the primary winding of the transformer module 14 ( Figure 3 The first discharge branch 133 is electrically connected to the first end of the first resistor R1 and the first end of the second resistor R2, and the second end of the second resistor R2 is electrically connected to the first end of the freewheeling branch 134. In this way, the first discharge branch 133 can continue to work when the first resistor R1 is short-circuited or the second resistor R2 is short-circuited, thereby improving the reliability of the first discharge branch 133.

[0050] In one embodiment, the first absorption branch 131 includes at least one capacitor and at least one resistor; the at least one capacitor is arranged in series, the at least one resistor is arranged in series, and the at least one capacitor and the at least one resistor are arranged in series. One end of the at least one capacitor and the at least one resistor connected in series is electrically connected to the first end of the primary winding of the transformer module 14, and the other end of the at least one capacitor and the at least one resistor connected in series is electrically connected to the first end of the freewheeling branch. In other words, the at least one capacitor and the at least one resistor are connected in series in sequence to form an RC series branch, and the RC series branch includes two ends, and the two ends of the RC series branch are electrically connected in parallel with the first discharge branch 133. In this way, the first absorption branch 131 and the first discharge branch 133 can constitute an RCD absorption circuit.

[0051] In one embodiment, see Figure 4, at least one capacitor in the first absorption branch 131 includes a first capacitor C1, and at least one resistor includes a third resistor R3. The first end of the first capacitor C1 is electrically connected to the first end of the primary winding of the transformer module 14, the second end of the first capacitor C1 is electrically connected to the first end of the third resistor R3; the second end of the third resistor R3 is electrically connected to the first end of the freewheeling branch 134.

[0052] In one example, the first capacitor C1 is implemented by an NPO capacitor. The temperature coefficient of the NPO capacitor is zero, and its capacitance value does not change with the change of temperature. In addition, it has low loss and high quality factor (Q value), and can be used in charging circuits or precision instruments with high operating frequencies. Moreover, in high-frequency charging circuits, the NPO capacitor can provide better signal transmission with low power consumption and can better suppress noise. In one example, the first capacitor C1 is implemented by a capacitor at the microfarad level or millifarad level.

[0053] In an example, the third resistor R3 can be implemented by using a resistor whose resistance value is less than or equal to a preset resistance threshold, and the value range of the preset resistance threshold is [1, 100] ohms.

[0054] In one embodiment, the second absorption branch 132 includes at least one capacitor and at least one resistor; the at least one capacitor is arranged in series, the at least one resistor is arranged in series, and the at least one capacitor and the at least one resistor are arranged in series. One end of the at least one capacitor and the at least one resistor connected in series is electrically connected to the first end of the primary winding of the transformer module 14, and the other end of the at least one capacitor and the at least one resistor connected in series is electrically connected to the first end of the freewheeling branch. In other words, the at least one capacitor and the at least one resistor are connected in series in sequence to form an RC series branch, and the RC series branch includes two ends, and the two ends of the RC series branch are electrically connected in parallel with the first discharge branch 133. In this way, the second absorption branch 132 and the first discharge branch 133 can constitute an RCD absorption circuit.

[0055] In one embodiment, see Figure 4 , at least one capacitor in the second absorption branch 132 includes a second capacitor C2, and at least one resistor includes a fourth resistor R4. Among them, the first end of the second capacitor C2 is electrically connected to the first end of the primary winding of the transformer module 14, and the second end of the second capacitor C2 is electrically connected to the first end of the fourth resistor R4; the second end of the fourth resistor R4 is electrically connected to the first end of the freewheeling branch 134. In one example, the second capacitor C2 can be implemented with the same capacitor as the first capacitor C1, such as an NPO capacitor. In one example, the fourth resistor R4 can be implemented with a resistor having a resistance value less than or equal to a preset resistance threshold, and the preset resistance threshold has a value range of [1, 100] ohms.

[0056] It should be noted that, in this embodiment, by providing the first absorption branch 131 and the second absorption branch 132, the RCD absorption circuit can still work when the first absorption branch 131 fails or the second absorption branch 132 fails, thereby improving the reliability of the charging circuit. In addition, the first absorption branch 131 and the second absorption branch 132 can absorb the peak voltage of the DC output by the filter module, thereby improving the noise of the charging circuit.

[0057] In one embodiment, see Figure 5 The absorption module 13 further includes a second discharge branch 135. A first end of the second discharge branch 135 is electrically connected to a first end of the primary winding of the transformer module 14, and a second end of the second discharge branch 135 is electrically connected to a first end of the freewheeling branch 134. In other words, the second discharge branch 135 is arranged in parallel with the first discharge branch 133, and continues to work when the first discharge branch 133 fails, thereby ensuring normal operation of the absorption module 13.

[0058] In one embodiment, the second discharge branch includes at least two resistors connected in series, and the at least two resistors are connected in series in sequence, and the branch after the series connection includes two ends, one end of the at least two resistors is electrically connected to the first end of the primary winding of the transformer module 14, and the other end of the at least two resistors is electrically connected to the first end of the freewheeling branch 134.

[0059] In one embodiment, see Figure 6 , the at least two resistors include a fifth resistor R5 and a sixth resistor R6; the first end of the fifth resistor R5 is electrically connected to the first end of the primary winding of the transformer module 14, and the second end of the fifth resistor R5 is electrically connected to the first end of the sixth resistor R6; the second end of the sixth resistor R6 is electrically connected to the first end of the freewheeling branch 134. In this way, the second discharge branch 135 can continue to work when the fifth resistor R5 is short-circuited or the sixth resistor R6 is short-circuited, thereby improving the reliability of the second discharge branch 135. In addition, the second discharge branch 135 and the first discharge branch 133 can work simultaneously, and the absorption module 13 can still work normally when one of the discharge branches fails, thereby improving the reliability of the charging circuit.

[0060] In one embodiment, the charging circuit further comprises a switch module. The first end of the switch module is electrically connected to the transformer module 14 and the absorption module 13 respectively. The switch module is used to release the charge stored in the transformer module 14 and the absorption module 13 when switched to the on state.

[0061] In one embodiment, see Figure 6The switch module 16 includes a seventh resistor R7 and a switch device Q1. The first end of the switch device Q1 is electrically connected to the second end of the freewheeling branch 134, and the second end of the switch device Q1 is grounded or grounded via the acquisition resistor Rsense; the control end of the switch device Q1 receives the control signal via the seventh resistor R7.

[0062] In one embodiment, the charging circuit further includes a control module (not shown in the figure). The control module can obtain the voltage value and / or current value of the sampling resistor Rsense, determine the input voltage, input current or input power of the primary winding (T1A), and thus determine the control signal. In one example, the control signal is a PWM signal, and the amplitude, duty cycle and other parameters of the PWM signal can adjust the input voltage, input current or input power of the primary winding (T1A). Taking the adjustment of the voltage value as an example, when the input voltage of the primary winding is greater than or equal to the first voltage threshold, the control module can control the switch device Q1 to switch to the on state, release the charge of the primary winding, and reduce the input voltage of the primary winding; when the input voltage of the primary winding is less than or equal to the second voltage threshold, the control module can control the switch device Q1 to switch to the off state, increase the input voltage of the primary winding, and thus control the output voltage of the transformer to fluctuate within a preset voltage range. It is understandable that the above-mentioned first voltage threshold, second voltage threshold and preset voltage range can be set according to specific scenarios. For example, the first voltage threshold is 5.5V, the second voltage threshold is 4.5V, and the preset voltage range is [4.2, 5.4]V. For another example, the first voltage threshold is 265V, the second voltage threshold is 210V, and the preset voltage range is [205, 260]V.

[0063] In one embodiment, see Figure 6 The charging circuit also includes a freewheeling diode D5 and an output capacitor EC4. The anode of the freewheeling diode D5 is electrically connected to the first end (different-name end) of the secondary winding (T1B) of the transformer in the transformer module 14, the cathode of the freewheeling diode D5 is electrically connected to the positive electrode of the output capacitor EC4, and the negative electrode of the output capacitor EC4 is electrically connected to the second end (same-name end) of the secondary winding of the transformer in the transformer module 14 and then grounded. In this way, the output capacitor EC4 can supply power to the load R8.

[0064] Combination Figure 6 The charging circuit shown in the example has the following working principle:

[0065] When the charging interface (N, L) is electrically connected to the charging device (not shown in the figure), the rectifier module 11 rectifies the AC power into DC power; the DC power is filtered by the filter module 12, and the inductor L1 and the capacitors on both sides form a π-type filter circuit, so that a smoother DC power can be output.

[0066] The absorption module 13 can absorb the above-mentioned direct current. When the switch device Q1 is switched to the disconnected state, the capacitors in the first absorption branch 131 and / or the second absorption branch 132 can store charges, that is, the charges stored in the primary winding of the transformer will enter the first capacitor C1 and / or the second capacitor C2 through the freewheeling branch 134, and the voltage value of the first capacitor C1 and / or the second capacitor C2 will increase. Correspondingly, the induced voltage of the switch device Q1 also increases.

[0067] When the switch device Q1 is switched to the on state, the primary winding of the transformer and the switch device Q1 form a current loop, at which time the charge stored in the primary winding of the transformer can be released through the switch device Q1, and the charge in the first capacitor C1 and / or the second capacitor C2 is transferred to the primary winding of the transformer and then released, at which time the voltage value of the first capacitor C1 and the second capacitor C2 decreases. Correspondingly, the induced voltage of the switch device Q1 also decreases.

[0068] It should be noted that the switching state of the switch device Q1 adjusts the input voltage of the primary winding of the transformer, and further adjusts the output voltage of the secondary winding of the transformer, thereby achieving the effect of adjusting the output voltage of the transformer.

[0069] In some scenarios, the present disclosure also provides a charging module, including: Figure 1 to Figure 6 The charging circuit shown is an example.

[0070] Figure 7 7 is a block diagram of an electronic device according to an exemplary embodiment. For example, the electronic device 700 may be a smart phone, a computer, a digital broadcast terminal, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0071] Reference Figure 7 The electronic device 700 may include one or more of the following components: a processing component 702 , a memory 704 , a power component 706 , a multimedia component 708 , an audio component 710 , an input / output (I / O) interface 712 , a sensor component 714 , a communication component 716 , and an image acquisition component 718 .

[0072] The processing component 702 generally controls the overall operation of the electronic device 700, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 702 may include one or more processors 720 to execute computer programs. In addition, the processing component 702 may include one or more modules to facilitate interaction between the processing component 702 and other components. For example, the processing component 702 may include a multimedia module to facilitate interaction between the multimedia component 708 and the processing component 702.

[0073] The memory 704 is configured to store various types of data to support operations on the electronic device 700. Examples of such data include computer programs for any application or method operating on the electronic device 700, contact data, phone book data, messages, pictures, videos, etc. The memory 704 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.

[0074] The power supply component 706 provides power to various components of the electronic device 700. The power supply component 706 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 700. The power supply component 706 may include the above-mentioned charging circuit and / or charging module to charge the load or battery of the electronic device.

[0075] The multimedia component 708 includes a screen that provides an output interface between the electronic device 700 and the target object.

[0076] 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 information from a target object. 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 a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation.

[0077] The audio component 710 is configured to output and / or input audio file information. For example, the audio component 710 includes a microphone (MIC), and when the electronic device 700 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive external audio file information. The received audio file information can be further stored in the memory 704 or sent via the communication component 716. In some embodiments, the audio component 710 also includes a speaker for outputting audio file information.

[0078] The I / O interface 712 provides an interface between the processing component 702 and a peripheral interface module, such as a keyboard, a click wheel, a button, etc.

[0079] The sensor component 714 includes one or more sensors for providing various aspects of status assessment for the electronic device 700. For example, the sensor component 714 can detect the open / closed state of the electronic device 700, the relative positioning of components, such as the display screen and keypad of the electronic device 700, and the sensor component 714 can also detect the position change of the electronic device 700 or a component, the presence or absence of contact between the target object and the electronic device 700, the orientation or acceleration / deceleration of the electronic device 700, and the temperature change of the electronic device 700. In this example, the sensor component 714 can include a magnetic sensor, a gyroscope, and a magnetic field sensor, and can also include an inertial sensor, an image sensor, etc., wherein the magnetic field sensor includes at least one of the following: a Hall sensor, a thin film magnetoresistive sensor, and a magnetic liquid acceleration sensor.

[0080] The communication component 716 is configured to facilitate wired or wireless communication between the electronic device 700 and other devices. The electronic device 700 can access a wireless network based on a communication standard, such as WiFi, 2G, 3G, 4G, 5G, or a combination thereof. In an exemplary embodiment, the communication component 716 receives broadcast information or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 716 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.

[0081] In an exemplary embodiment, the electronic device 700 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.

[0082] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations 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 to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0083] 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 transformer module and an absorption module; the absorption module includes a first absorption branch, a second absorption branch, a first discharge branch and a freewheeling branch; The first end of the first absorption branch is electrically connected to the first end of the primary winding of the transformer module, and the second end of the first absorption branch is electrically connected to the first end of the freewheeling branch; The first end of the second absorption branch is electrically connected to the first end of the primary winding of the transformer module, and the second end of the first absorption branch is electrically connected to the first end of the freewheeling branch; The first end of the first discharge branch is electrically connected to the first end of the primary winding of the transformer module, and the second end of the first discharge branch is electrically connected to the first end of the freewheeling branch; The second end of the freewheeling branch is electrically connected to the second end of the primary winding of the transformer module.

2. The charging circuit according to claim 1, characterized in that: The first discharge branch includes at least two resistors connected in series, one end of the at least two resistors is electrically connected to the first end of the primary winding of the transformer module, and the other end of the at least two resistors is electrically connected to the first end of the freewheeling branch.

3. The charging circuit according to claim 2, characterized in that: The at least two resistors include a first resistor and a second resistor; the first end of the first resistor is electrically connected to the first end of the primary winding of the transformer module, and the second end of the first resistor is electrically connected to the first end of the second resistor; the second end of the second resistor is electrically connected to the first end of the freewheeling branch.

4. The charging circuit according to claim 1, characterized in that: The first absorption branch comprises at least one capacitor and at least one resistor; the at least one capacitor is arranged in series, the at least one resistor is arranged in series, and the at least one capacitor and the at least one resistor are arranged in series; One end of the at least one capacitor and the at least one resistor connected in series is electrically connected to the first end of the primary winding of the transformer module, and the other end of the at least one capacitor and the at least one resistor connected in series is electrically connected to the first end of the freewheeling branch.

5. The charging circuit according to claim 4, characterized in that: The at least one capacitor comprises a first capacitor, and the at least one resistor comprises a third resistor; The first end of the first capacitor is electrically connected to the first end of the primary winding of the transformer module, the second end of the first capacitor is electrically connected to the first end of the third resistor; the second end of the third resistor is electrically connected to the first end of the freewheeling branch.

6. The charging circuit according to claim 1, characterized in that: The second absorption branch comprises at least one capacitor and at least one resistor; the at least one capacitor is arranged in series, the at least one resistor is arranged in series, and the at least one capacitor and the at least one resistor are arranged in series; One end of the at least one capacitor and the at least one resistor connected in series is electrically connected to the first end of the primary winding of the transformer module, and the other end of the at least one capacitor and the at least one resistor connected in series is electrically connected to the first end of the freewheeling branch.

7. The charging circuit according to claim 6, characterized in that: The at least one capacitor includes a second capacitor, and the at least one resistor includes a fourth resistor; The first end of the second capacitor is electrically connected to the first end of the primary winding of the transformer module, the second end of the second capacitor is electrically connected to the first end of the fourth resistor; the second end of the fourth resistor is electrically connected to the first end of the freewheeling branch.

8. The charging circuit according to claim 1, characterized in that: The absorption module also includes a second discharge branch; a first end of the second discharge branch is electrically connected to a first end of a primary winding of the transformer module, and a second end of the second discharge branch is electrically connected to a first end of the freewheeling branch.

9. The charging circuit according to claim 8, characterized in that: The second discharge branch includes at least two resistors connected in series, one end of the at least two resistors is electrically connected to the first end of the primary winding of the transformer module, and the other end of the at least two resistors is electrically connected to the first end of the freewheeling branch.

10. The charging circuit according to claim 9, characterized in that: The at least two resistors include a fifth resistor and a sixth resistor; the first end of the fifth resistor is electrically connected to the first end of the primary winding of the transformer module, and the second end of the fifth resistor is electrically connected to the first end of the sixth resistor; the second end of the sixth resistor is electrically connected to the first end of the freewheeling branch.

11. The charging circuit according to claim 5 or 7, characterized in that: The first capacitor and / or the second capacitor are implemented by using NPO capacitors.

12. The charging circuit according to claim 1, characterized in that: It also includes a switch module, wherein a first end of the switch module is electrically connected to the transformer module and the absorption module respectively; The switch module is used to release the charges stored in the transformer module and the absorption module when switched to a conducting state.

13. A charging module, characterized in that: The charging module comprises the charging circuit as described in any one of claims 1 to 12.

14. An electronic device, characterized in that: The electronic device comprises the charging circuit according to any one of claims 1 to 12, and / or the charging module according to claim 13.

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