Charging circuit, charging method, charging device, charging equipment and medium

Abstract

The invention relates to a charging circuit, a charging method, a charging device, charging equipment and a medium. The charging circuit comprises a first rectifying circuit, the input end of the first rectifying circuit is used for being coupled with an alternating-current power supply, and the first rectifying circuit is used for converting alternating-current voltage of the alternating-current power supply into first direct-current voltage; the input end of the first filter circuit is coupled with the output end of the first rectifying circuit, and the first filter circuit is used for filtering the first direct-current voltage; and the time-delay conduction circuit is coupled between the output end of the first rectifying circuit and the input end of the first filtering circuit, and the time-delay conduction circuit is used for conducting the first rectifying circuit and the first filtering circuit in a time-delay manner under the condition that the state of the alternating-current power supply is changed from a non-access state to an access state. As the contact impedance of the charging equipment is small after the charging equipment is inserted into the alternating current power supply jack, the larger contact impedance is staggered from the generation time of the impact current through time delay, so that the service life of the charging equipment is prolonged.

Description

Technical Field

[0001] This disclosure relates to the field of charging technology, and in particular to a charging circuit, charging method, charging device, charging equipment and medium. Background Technology

[0002] With the development of charging technology, the power of charging devices is constantly increasing, resulting in a large inrush current flowing through the device at the moment of power-on. Because the charging device has significant contact resistance at the moment of insertion into the AC power socket, and this contact resistance carries a large inrush current, the energy generated can break down the air, causing an electrical spark and affecting the lifespan of the charging device. Summary of the Invention

[0003] To overcome the problems existing in related technologies, this disclosure provides a charging circuit, a charging method, a charging device, a charging equipment, and a medium.

[0004] According to a first aspect of this disclosure, a charging circuit is provided, the charging circuit comprising:

[0005] A first rectifier circuit, wherein the input terminal of the first rectifier circuit is used to be coupled to an AC power supply, and the first rectifier circuit is used to convert the AC voltage of the AC power supply into a first DC voltage.

[0006] A first filter circuit, wherein the input terminal of the first filter circuit is coupled to the output terminal of the first rectifier circuit, is used to filter the first DC voltage.

[0007] A time-delayed conduction circuit is coupled between the output terminal of the first rectifier circuit and the input terminal of the first filter circuit. The time-delayed conduction circuit is used to delay the conduction of the first rectifier circuit and the first filter circuit when the state of the AC power supply changes from an unconnected state to an connected state.

[0008] In some embodiments of this disclosure, the delay-on circuit includes:

[0009] The first switching unit is coupled between the output terminal of the first rectifier circuit and the input terminal of the first filter circuit.

[0010] A control circuit is coupled to the control terminal of the first switching unit. The control circuit is used to delay turning on the first switching unit when the state of the AC power supply changes from an unconnected state to an connected state.

[0011] In some embodiments of this disclosure, the control circuit includes:

[0012] The second switching unit has a first end coupled to the control end of the first switching unit, and a second end coupled to the grounding end.

[0013] A delay circuit, wherein the first terminal of the delay circuit is coupled to the control terminal of the second switching unit;

[0014] A driving circuit, wherein a first terminal of the driving circuit is coupled to a second terminal of the delay circuit, and the driving circuit is used to output a driving signal.

[0015] In some embodiments of this disclosure, the delay circuit includes:

[0016] A first resistor, the first end of which is coupled to the first end of the driving circuit;

[0017] A first capacitor, wherein a first terminal of the first capacitor is coupled to a second terminal of the first resistor, and the second terminal of the first capacitor is used to be coupled to the ground terminal;

[0018] The first Zener diode has its cathode coupled to the second terminal of the first resistor and the first terminal of the first capacitor, and its anode coupled to the control terminal of the second switching unit.

[0019] In some embodiments of this disclosure, the second terminal of the driving circuit is coupled to the output terminal of the first rectifier circuit;

[0020] Wherein, the first rectifier circuit is further configured to start the drive circuit with the first DC voltage; or,

[0021] The charging circuit also includes:

[0022] The second rectifier circuit has an input terminal that is coupled to the AC power supply and an output terminal that is coupled to the second terminal of the drive circuit. The second rectifier circuit is used to convert the AC voltage into a second DC voltage and to start the drive circuit with the second DC voltage.

[0023] In some embodiments of this disclosure, the third terminal of the driving circuit is coupled to the output terminal of the first rectifier circuit; or,

[0024] The third terminal of the driving circuit is coupled to the output terminal of the second rectifier circuit;

[0025] The driving circuit is also used to detect the state of the AC power supply.

[0026] In some embodiments of this disclosure, the charging circuit further includes:

[0027] An electromagnetic interference filtering circuit is coupled between the AC power supply and the input terminal of the first rectifier circuit.

[0028] The input terminal of the second rectifier circuit is coupled to both the input terminal of the AC power supply and the input terminal of the electromagnetic interference filter circuit.

[0029] In some embodiments of this disclosure, the charging circuit further includes:

[0030] A voltage conversion circuit is provided, wherein the input terminal of the voltage conversion circuit is coupled to the output terminal of the first filter circuit, the output terminal of the voltage conversion circuit is used to couple to an electronic device, and the voltage conversion circuit is used to convert the filtered first DC voltage to charge the electronic device.

[0031] In some embodiments of this disclosure, the voltage conversion circuit includes a transformer, and a first end of the auxiliary winding of the transformer is used to couple to the ground terminal; the time-delay conduction circuit further includes:

[0032] A power supply circuit, wherein a first terminal of the power supply circuit is coupled to a second terminal of the auxiliary winding, and a second terminal of the power supply circuit is coupled to a fourth terminal of the drive circuit, and the power supply circuit is used to supply power to the drive circuit.

[0033] In some embodiments of this disclosure, the power supply circuit includes:

[0034] A third rectifier circuit, wherein the input terminal of the third rectifier circuit is coupled to the second terminal of the auxiliary winding;

[0035] A voltage regulator circuit, wherein the first terminal of the voltage regulator circuit is coupled to the output terminal of the third rectifier circuit, the second terminal of the voltage regulator circuit is coupled to the fourth terminal of the drive circuit, and the third terminal of the voltage regulator circuit is used to be coupled to the ground terminal.

[0036] In some embodiments of this disclosure, the power supply circuit further includes:

[0037] A unidirectional conduction unit is coupled between the second terminal of the voltage regulator circuit and the fourth terminal of the drive circuit. The unidirectional conduction unit is used to allow current to flow unidirectionally from the second terminal of the voltage regulator circuit to the fourth terminal of the drive circuit.

[0038] The second filter circuit has a first terminal coupled between the unidirectional conduction unit and the fourth terminal of the drive circuit, and a second terminal coupled to the ground terminal.

[0039] In some embodiments of this disclosure, the fifth terminal of the driving circuit is coupled to the input or output terminal of the first filter circuit, and the driving circuit is further configured to keep the first switching unit on when the third DC voltage at the input or output terminal of the first filter circuit is greater than a preset voltage.

[0040] In some embodiments of this disclosure, the charging circuit further includes:

[0041] A thermistor is coupled between the AC power supply and the input terminal of the first rectifier circuit.

[0042] According to a second aspect of this disclosure, a charging method is provided, the charging method comprising:

[0043] When the AC power supply changes from an unconnected state to an connected state, the first rectifier circuit and the first filter circuit are turned on after a delay. The first rectifier circuit is used to convert the AC voltage of the AC power supply into a first DC voltage, and the first filter circuit is used to filter the first DC voltage.

[0044] In some embodiments of this disclosure, the first switching unit is coupled between the first rectifier circuit and the first filter circuit; the delayed switching on of the first rectifier circuit and the first filter circuit includes:

[0045] The first switching unit is turned on after a delay.

[0046] In some embodiments of this disclosure, a first terminal of the second switching unit is coupled to a control terminal of the first switching unit, and a second terminal of the second switching unit is used to be coupled to a ground terminal; the delay-on function of the first switching unit includes:

[0047] Output a delayed drive signal to the control terminal of the second switching unit; or,

[0048] A drive signal is output to the delay circuit so that the drive signal is delayed by the delay circuit and then output to the control terminal of the second switching unit;

[0049] The delay circuit is coupled to the control terminal of the second switching unit.

[0050] In some embodiments of this disclosure, the charging method further includes:

[0051] Detect the third DC voltage at the input or output terminal of the first filter circuit;

[0052] When the third DC voltage is greater than the preset voltage, the first switching unit remains on.

[0053] According to a third aspect of this disclosure, a charging device is provided, the charging device comprising:

[0054] A delayed-on module is configured to delay the on-time of a first rectifier circuit and a first filter circuit when the state of the AC power supply changes from an unconnected state to an connected state. The first rectifier circuit is used to convert the AC voltage of the AC power supply into a first DC voltage, and the first filter circuit is used to filter the first DC voltage.

[0055] According to a fourth aspect of this disclosure, a charging device is provided, the charging device comprising the charging circuit described above; or,

[0056] processor;

[0057] Memory used to store the processor's executable instructions;

[0058] The processor is configured to perform the charging method described above.

[0059] According to a fifth aspect of this disclosure, a non-transitory computer-readable storage medium is provided, wherein when instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to perform the charging method as described above.

[0060] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0061] The charging circuit includes a first rectifier circuit, a first filter circuit, and a delayed-on circuit, with the delayed-on circuit coupled between the first rectifier circuit and the first filter circuit. When the AC power supply changes from an unconnected state to a connected state, the delayed-on circuit delays the activation of the first rectifier circuit and the first filter circuit to generate a larger inrush current. Since the contact resistance of the charging device is relatively low after being inserted into the AC power socket, the delay staggers the occurrence of the larger contact resistance and the inrush current to avoid electrical sparks, thereby improving the service life of the charging device.

[0062] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0063] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0064] Figure 1 This is a schematic diagram of a charging circuit.

[0065] Figure 2This is a schematic diagram of the structure of a charging circuit provided in an exemplary embodiment of the present disclosure;

[0066] Figure 3 This is a schematic diagram of the structure of a charging circuit provided in another exemplary embodiment of this disclosure;

[0067] Figure 4 This is a schematic diagram of the structure of a charging circuit provided in another exemplary embodiment of this disclosure;

[0068] Figure 5 This is a schematic diagram of the structure of a charging circuit provided in another exemplary embodiment of this disclosure;

[0069] Figure 6 This is a schematic diagram of the structure of a charging circuit provided in another exemplary embodiment of this disclosure;

[0070] Figure 7 This is a schematic diagram of the structure of a charging circuit provided in another exemplary embodiment of this disclosure;

[0071] Figure 8 This is a schematic diagram of the structure of a charging circuit provided in another exemplary embodiment of this disclosure;

[0072] Figure 9 This is a schematic flowchart of a charging method provided in an exemplary embodiment of this disclosure;

[0073] Figure 10 This is a block diagram of a charging device provided in an exemplary embodiment of the present disclosure;

[0074] Figure 11 This is a block diagram of an electronic device provided in an exemplary embodiment of the present disclosure.

[0075] In the picture:

[0076] 10-First rectifier circuit; 20-First filter circuit; 30-Delay conduction circuit; 31-First switching unit; 32-Control circuit; 33-Power supply circuit; 40-Second rectifier circuit; 50-Electromagnetic interference filter circuit; 100-Delay conduction module; 321-Second switching unit; 322-Delay circuit; 323-Drive circuit; 331-Third rectifier circuit; 332-Voltage regulator circuit; 333-One-way conduction unit; 334-Second filter circuit; 400-Electronic device; 402-Processing component; 404-Memory; 406-Power supply component; 408-Multimedia component; 410-Audio component; 412-Input / output interface; 414-Sensor component; 416-Communication component; 420-Processor; D1-First diode; D2-Second diode; D3-Third diode; D4-Fourth diode; D5 - Fifth diode; D6 - Sixth diode; D7 - Seventh diode; D8 - Eighth diode; ZD1 - First Zener diode; ZD2 - Second Zener diode; Q1 - First transistor; Q2 - Second transistor; Q3 - Third transistor; C1 - First capacitor; C2 - Second capacitor; EC1 - First electrolytic capacitor; EC2 - Second electrolytic capacitor; EC3 - Third electrolytic capacitor; LF - Common mode inductor; L - Filter inductor; R1 - First resistor; R2 - Second resistor; R3 - Third resistor; R4 - Fourth resistor; R5 - Fifth resistor; R6 - Sixth resistor; R7 - Seventh resistor; NTC - Thermistor; F - Fuse; AC - AC power supply; TB - Auxiliary winding; PGND - Ground terminal; DRI - Drive terminal; HV - High voltage start terminal; RSV - Sampling terminal; VS - Voltage detection terminal; VCC - Power supply terminal; GND - Common terminal. Detailed Implementation

[0077] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0078] With the development of charging technology, the power of charging devices is constantly increasing, and the capacitance value of the capacitors in the filter circuit coupled to the rectifier circuit in the charging device is gradually increasing. Due to the large capacitance value, a large inrush current flows through the charging device at the moment of power-on. Because the contact area between the charging device plug and the AC power socket is small at the moment of insertion, there is a large contact resistance. The large inrush current flowing through this large contact resistance can cause the instantaneous energy to break down the air, resulting in an electric spark, which affects the lifespan of the charging device.

[0079] In related technologies, a charging circuit is provided, such as Figure 1 As shown, the charging circuit includes a fuse F, a common-mode inductor LF, a thermistor NTC, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a filter inductor L, a first electrolytic capacitor EC1, and a second electrolytic capacitor EC2. The fuse F is coupled between the first terminal of the AC power supply AC and the first input terminal of the common-mode inductor LF. The thermistor NTC is coupled between the second terminal of the AC power supply AC and the second input terminal of the common-mode inductor LF. The first output terminal of the common-mode inductor LF is coupled to the anode of the first diode D1 and the cathode of the second diode D2, and the second output terminal is coupled to the anode of the third diode D3 and the cathode of the fourth diode D4. The cathode of the first diode D1 is coupled to the cathode of the third diode D3, the first terminal of the first electrolytic capacitor EC1, and the first terminal of the filter inductor L. The anode of the second diode D2 is coupled to the anode of the fourth diode D4, the second terminal of the first electrolytic capacitor EC1, and the ground terminal PGND. The second terminal of the filter inductor L is coupled to the first terminal of the second electrolytic capacitor EC2. The second terminal of the second electrolytic capacitor EC2 is coupled to the ground terminal PGND. A flyback circuit is also coupled after the first and second terminals of the second electrolytic capacitor EC2. This flyback circuit performs voltage conversion to charge the electronic device through the charging interface and cable of the charging equipment. By adding a thermistor NTC to the charging circuit, the resistance of the thermistor NTC is relatively large at the moment the charging equipment is powered on, which can reduce the inrush current and reduce the possibility of electric sparks. However, as the resistance of the thermistor NTC continues to increase, the loss of the thermistor NTC gradually increases, and the temperature rise of the thermistor NTC gradually increases, affecting the overall temperature rise of the charging equipment. To reduce the temperature rise of the charging equipment, the resistance of the thermistor NTC is kept relatively small, resulting in a still relatively high possibility of electric sparks, which affects the service life of the charging equipment.

[0080] Based on this, the present disclosure provides a charging circuit that disconnects the first rectifier circuit and the first filter circuit the instant the charging device is plugged into the AC power socket, thus preventing a large inrush current from flowing under conditions of high contact resistance. After a certain period of time, the first rectifier circuit and the first filter circuit are turned on, allowing a large inrush current to flow under conditions of low contact resistance, thereby preventing electrical sparks and improving the service life of the charging device.

[0081] An exemplary embodiment of this disclosure provides a charging circuit, such as Figure 2 As shown, the charging circuit includes a first rectifier circuit 10, a first filter circuit 20, and a delay-on circuit 30. The input terminal of the first rectifier circuit 10 is coupled to an AC power supply (AC) to convert the AC voltage of the AC power supply (AC) into a first DC voltage. The input terminal of the first filter circuit 20 is coupled to the output terminal of the first rectifier circuit 10 to filter the first DC voltage. The delay-on circuit 30 is coupled between the output terminal of the first rectifier circuit 10 and the input terminal of the first filter circuit 20, and is used to delay the on-time conduction of the first rectifier circuit 10 and the first filter circuit 20 when the state of the AC power supply (AC) changes from an unconnected state to a connected state.

[0082] In this embodiment, the charging circuit includes a first rectifier circuit, a first filter circuit, and a delayed conduction circuit, with the delayed conduction circuit coupled between the first rectifier circuit and the first filter circuit. When the AC power supply changes from an unconnected state to a connected state, the delayed conduction circuit delays the conduction of the first rectifier circuit and the first filter circuit to generate a larger inrush current. Since the contact impedance of the charging device is relatively low after being inserted into the AC power socket, the delay staggers the occurrence of the larger contact impedance and the inrush current to avoid electrical sparks, thereby improving the service life of the charging device.

[0083] For example, the AC power supply can be a power frequency AC power supply.

[0084] In one embodiment, such as Figure 3 As shown, the delayed-on circuit 30 includes a first switching unit 31 and a control circuit 32. The first switching unit 31 is coupled between the output terminal of the first rectifier circuit 10 and the input terminal of the first filter circuit 20. The control circuit 32 is coupled to the control terminal of the first switching unit 31 and is used to delay-on the first switching unit 31 when the state of the AC power supply changes from an unconnected state to an connected state.

[0085] In this embodiment, by coupling the first switching unit between the output terminal of the first rectifier circuit and the input terminal of the first filter circuit, the first rectifier circuit and the first filter circuit can be turned on when the control circuit controls the first switching unit to be turned on, and the first rectifier circuit and the first filter circuit can be turned off when the control circuit controls the first switching unit to be turned off. By using the first switching unit and the control circuit to delay the turn-on of the first rectifier circuit and the first filter circuit, the required components for the delayed turn-on circuit are fewer and the control method is simpler, thereby reducing the complexity of the charging circuit structure.

[0086] For example, such as Figure 4 As shown, the first rectifier circuit 10 includes a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4. The first filter circuit 20 includes a first electrolytic capacitor EC1, a second electrolytic capacitor EC2, and a filter inductor L. The first switching unit 31 includes a first transistor Q1. The anode of the first diode D1 is coupled to the cathode of the second diode D2 as the first input terminal of the first rectifier circuit 10, which is coupled to the first terminal of the AC power supply AC. The cathode of the first diode D1 is coupled to the cathode of the third diode D3 as the first output terminal of the first rectifier circuit 10, which is coupled to the first terminal of the first transistor Q1. The anode of the third diode D3 is coupled to the cathode of the fourth diode D4 as the second input terminal of the first rectifier circuit 10, which is coupled to the second terminal of the AC power supply AC. The anode of the second diode D2 is coupled to the anode of the fourth diode D4 as the second output terminal of the first rectifier circuit 10, which is used to couple to the ground terminal PGND. The first terminal of the first electrolytic capacitor EC1 is coupled to the first terminal of the filter inductor L, serving as the first input terminal of the first filter circuit 20. The second terminal of EC1 is also coupled to the second input terminal of the first filter circuit 20, and is used to couple to the ground terminal PGND. The first terminal of the second electrolytic capacitor EC2 is coupled to the second terminal of the filter inductor L, serving as the first output terminal of the first filter circuit 20. The second terminal of EC2 is used to couple to the ground terminal PGND. The control terminal of the first transistor Q1 is coupled to the control circuit 32.

[0087] It is understood that the first transistor Q1 can be coupled between the first output terminal of the first rectifier circuit 10 and the first input terminal of the first filter circuit 20, or it can be coupled between the second output terminal of the first rectifier circuit 10 and the second input terminal of the first filter circuit 20, without limitation here.

[0088] For example, the first transistor Q1 can be an N-type transistor or a P-type transistor.

[0089] In one embodiment, such as Figure 5As shown, the control circuit 32 includes a second switching unit 321, a delay circuit 322, and a drive circuit 323. The first terminal of the second switching unit 321 is coupled to the control terminal of the first switching unit 31, and the second terminal is used to be coupled to the ground terminal PGND. The first terminal of the delay circuit 322 is coupled to the control terminal of the second switching unit 321. The first terminal of the drive circuit 323 is coupled to the second terminal of the delay circuit 322, and the drive circuit 323 is used to output a drive signal.

[0090] In this embodiment, the first switching unit is indirectly controlled by setting a second switching unit between the control terminal and the ground terminal of the first switching unit, which avoids transmitting abnormal first DC voltage to the driving circuit and damaging the driving circuit, thereby improving the reliability of the charging circuit.

[0091] It is understood that the second switching unit 321 can be coupled between the control terminal and the ground terminal PGND of the first switching unit 31, or it can be coupled between the control terminal of the first switching unit 31 and the DC power supply; this is not limited here.

[0092] For example, the delay circuit 322 can be integrated into a single circuit with the drive circuit 323, or it can be separated from the drive circuit 323 into two separate circuits.

[0093] For example, the first terminal of the drive circuit 323 can be the drive terminal DRI. When the level of the drive signal is a first level, the second switch unit 321 is turned on. When the level of the drive signal is a second level, the second switch unit 321 is turned off.

[0094] In one embodiment, such as Figure 6 As shown, the delay circuit 322 includes a first resistor R1, a first capacitor C1, and a first Zener diode ZD1. The first end of the first resistor R1 is coupled to the first end of the drive circuit 323. The first end of the first capacitor C1 is coupled to the second end of the first resistor R1, and the second end is used to couple to the ground terminal PGND. The cathode of the first Zener diode ZD1 is coupled to both the second end of the first resistor R1 and the first end of the first capacitor C1, and the anode is coupled to the control terminal of the second switching unit 321.

[0095] In this embodiment, since the voltage of the drive signal output by the drive circuit is constant, the magnitude of the first resistor determines the magnitude of the current flowing through the first capacitor, thereby determining the charging speed of the first capacitor. When the first capacitor is charged to a certain extent, the first Zener diode breaks down in reverse, turning on the second switching unit. The charging speed of the first capacitor and the breakdown voltage of the first Zener diode determine the delay time. By using the first resistor, the first capacitor, and the first Zener diode to form a delay circuit, the structure of the delay circuit is simple and the delay time of the drive signal is easy to adjust, thus reducing the complexity of the charging circuit structure.

[0096] For example, the second switching unit 321 includes a second transistor Q2. The second transistor Q2 can be an N-type transistor or a P-type transistor.

[0097] For example, in addition to using a first resistor R1, a first capacitor C1 and a first Zener diode ZD1 to form the delay circuit 322, transistors, operational amplifiers, resistors, capacitors and other devices can also be used to form the delay circuit 322, which is not limited here.

[0098] In one embodiment, the second terminal of the drive circuit 323 is coupled to the output terminal of the first rectifier circuit 10. The first rectifier circuit 10 is also used to start the drive circuit 323 with a first DC voltage.

[0099] In this embodiment, since the first switching unit is in the off state when the AC power supply changes from an unconnected state to an connected state, the first filter circuit cannot supply power to the drive circuit, causing the first switching unit to remain in the off state. By coupling the second terminal of the drive circuit to the output terminal of the first rectifier circuit, the first rectifier circuit is used to start the drive circuit. The drive circuit can operate normally to output the drive signal with a delay, thereby improving the reliability of the charging circuit. At the same time, since no additional connection circuit is required, the number of components in the charging circuit is reduced, thereby reducing the complexity of the charging circuit structure.

[0100] For example, the second terminal of the driving circuit 323 can be the high-voltage start-up terminal HV. The second terminal of the driving circuit 323 is coupled between the cathode of the first diode D1 and the first terminal of the first transistor Q1. The second terminal of the driving circuit 323 can be coupled between the cathode of the first diode D1 and the first terminal of the first transistor Q1 through a second resistor and a third resistor.

[0101] In one embodiment, the third terminal of the drive circuit 323 is coupled to the output terminal of the first rectifier circuit 10. The drive circuit 323 is also used to detect the state of the AC power supply.

[0102] In this embodiment, since the drive circuit outputs a drive signal when the AC power supply is connected, it is necessary to detect the AC power supply status. The third terminal of the drive circuit is coupled to the output terminal of the first rectifier circuit to detect the AC power supply status. By detecting the AC power supply status, the system determines whether to output a drive signal, avoiding accidental output of a drive signal when the AC power supply is not connected, which could generate electrical sparks and thus improve the lifespan of the charging equipment.

[0103] For example, the third terminal of the driving circuit 323 can be the sampling terminal RSV. The third terminal of the driving circuit 323 can be coupled to the second terminal of the driving circuit 323 to be coupled between the cathode of the first diode D1 and the first terminal of the first transistor Q1.

[0104] It is understandable that the third terminal of the drive circuit 323 may not be coupled to the output terminal of the first rectifier circuit 10. That is, after the drive circuit 323 is started, the drive circuit 323 directly outputs the drive signal.

[0105] In one embodiment, such as Figure 7 As shown, the charging circuit also includes a second rectifier circuit 40. The input terminal of the second rectifier circuit 40 is coupled to an AC power supply, and the output terminal is coupled to the second terminal of the drive circuit 323. The second rectifier circuit 40 is used to convert the AC voltage into a second DC voltage and to start the drive circuit 323 with the second DC voltage.

[0106] In this embodiment, since the first switching unit is in the off state when the AC power supply changes from an unconnected state to an connected state, the first filter circuit cannot supply power to the drive circuit, causing the first switching unit to remain in the off state. By coupling the second terminal of the drive circuit to the output terminal of the second rectifier circuit, the second rectifier circuit is used to start the drive circuit. The drive circuit can operate normally to output the drive signal with a delay, thereby improving the reliability of the charging circuit. At the same time, since the second rectifier circuit is only used to start the drive circuit, circuit reuse is avoided, allowing the drive circuit to start quickly, thereby further improving the reliability of the charging circuit.

[0107] For example, such as Figure 8 As shown, the second rectifier circuit 40 includes a fifth diode D5 and a sixth diode D6. The anode of the fifth diode D5 is coupled to the first terminal of the AC power supply AC, and its cathode is coupled to the cathode of the sixth diode D6 and the second terminal of the drive circuit 323. The anode of the sixth diode D6 is coupled to the second terminal of the AC power supply AC.

[0108] In one embodiment, such as Figure 7 As shown, the third terminal of the drive circuit 323 is coupled to the output terminal of the second rectifier circuit 40. The drive circuit 323 is also used to detect the state of the AC power supply.

[0109] In this embodiment, since the drive circuit outputs a drive signal when the AC power supply is connected, it is necessary to detect the AC power supply status. The third terminal of the drive circuit is coupled to the output terminal of the second rectifier circuit to detect the AC power supply status. By detecting the AC power supply status, the system determines whether to output a drive signal, avoiding accidental output of a drive signal when the AC power supply is not connected, which could generate electrical sparks and thus improve the lifespan of the charging equipment.

[0110] For example, the third terminal of the driving circuit 323 can be coupled to the second terminal of the driving circuit 323 to be coupled between the cathode of the fifth diode D5 and the cathode of the sixth diode D6.

[0111] It is understandable that the third terminal of the drive circuit 323 may not be coupled to the output terminal of the second rectifier circuit 40. That is, after the drive circuit 323 is started, the drive circuit 323 directly outputs the drive signal.

[0112] In one embodiment, such as Figure 7 As shown, the charging circuit also includes an electromagnetic interference (EMI) filter circuit 50. The EMI filter circuit 50 is coupled between the AC power supply (AC) and the input terminal of the first rectifier circuit 10. The input terminal of the second rectifier circuit 40 is coupled to both the AC power supply (AC) and the input terminal of the EMI filter circuit 50.

[0113] In this embodiment, by setting an electromagnetic interference filter circuit before the first rectifier filter circuit, the impact of electromagnetic interference from the AC power supply on the charging circuit can be reduced, thereby improving the reliability of the charging circuit.

[0114] For example, such as Figure 8 As shown, the electromagnetic interference filter circuit 50 includes a common-mode inductor LF. The first input terminal of the common-mode inductor LF is coupled to the first terminal of the AC power supply AC and the anode of the fifth diode D5. The second input terminal is coupled to the second terminal of the AC power supply AC and the anode of the sixth diode D6. The first output terminal is coupled to the anode of the first diode D1 and the cathode of the second diode D2. The second output terminal is coupled to the anode of the third diode D3 and the cathode of the fourth diode D4.

[0115] In one embodiment, the charging circuit further includes a voltage conversion circuit. The input terminal of the voltage conversion circuit is coupled to the output terminal of the first filter circuit 20, and the output terminal is used to couple with an electronic device. The voltage conversion circuit is used to convert the filtered first DC voltage to charge the electronic device.

[0116] In this embodiment, since the filtered first DC voltage is too high, directly using it to charge electronic devices would damage them. By converting the filtered first DC voltage using a voltage conversion circuit, the electronic devices can be charged with a suitable voltage, thereby improving the reliability of the charging circuit.

[0117] For example, the voltage conversion circuit can be a DC-DC converter circuit with a transformer, such as a flyback circuit.

[0118] In one embodiment, such as Figure 5 and Figure 7 As shown, the voltage conversion circuit includes a transformer, and the first end of the auxiliary winding TB of the transformer is coupled to the ground terminal PGND. The delay-on circuit 30 also includes a power supply circuit 33. The first end of the power supply circuit 33 is coupled to the second end of the auxiliary winding TB, and the second end is coupled to the fourth end of the drive circuit 323, for supplying power to the drive circuit 323.

[0119] In this embodiment, since the first or second rectifier circuit is only used to start the drive circuit, the drive circuit needs to be powered after startup to operate stably. After startup, the first rectifier circuit and the first filter circuit conduct after a delay, and the windings of the transformer become energized. By transferring the electrical energy of the transformer's auxiliary winding to the power supply circuit to power the drive circuit, the higher voltage and lower voltage are isolated, ensuring stable operation of the drive circuit and thus improving the reliability of the charging circuit.

[0120] For example, the fourth terminal of the drive circuit 323 can be the power supply terminal VCC.

[0121] In one embodiment, such as Figure 7 As shown, the power supply circuit 33 includes a third rectifier circuit 331 and a voltage regulator circuit 332. The input terminal of the third rectifier circuit 331 is coupled to the second terminal of the auxiliary winding TB. The first terminal of the voltage regulator circuit 332 is coupled to the output terminal of the third rectifier circuit 331, the second terminal is coupled to the fourth terminal of the drive circuit 323, and the third terminal is used to couple to the ground terminal PGND.

[0122] In this embodiment, since the voltage of the auxiliary winding is AC, it cannot directly power the drive circuit. A third rectifier circuit converts the AC voltage to DC. Because the voltage of the transformer windings may be unstable during operation, causing the drive circuit to malfunction, a voltage regulator circuit stabilizes the rectified voltage to power the drive circuit. By processing the voltage of the auxiliary winding through the third rectifier circuit and the voltage regulator circuit to power the drive circuit, the power supply to the drive circuit is stable, thereby improving the reliability of the charging circuit.

[0123] In one embodiment, such as Figure 8 As shown, the third rectifier circuit 331 includes a seventh diode D7. The voltage regulator circuit 332 includes a third electrolytic capacitor EC3, a fourth resistor R4, a second Zener diode ZD2, and a third transistor Q3. The anode of the seventh diode D7 is coupled to the second terminal of the auxiliary winding TB, and the cathode is coupled to the first terminal of the third electrolytic capacitor EC3, the first terminal of the fourth resistor R4, and the first terminal of the third transistor Q3. The second terminal of the third electrolytic capacitor EC3 is coupled to the anode of the second Zener diode ZD2 and the ground terminal PGND. The second terminal of the fourth resistor R4 is coupled to the control terminal of the third transistor Q3 and the cathode of the second Zener diode ZD2. The second terminal of the third transistor Q3 is coupled to the fourth terminal of the drive circuit 323. The third transistor Q3 can be an N-type transistor.

[0124] For example, the power supply circuit 33 also includes a fifth resistor R5. The fifth resistor R5 is coupled between the second terminal of the auxiliary winding TB and the anode of the seventh diode D7.

[0125] In one embodiment, such as Figure 7 As shown, the power supply circuit 33 also includes a unidirectional conduction unit 333 and a second filter circuit 334. The unidirectional conduction unit 333 is coupled between the second terminal of the voltage regulator circuit 332 and the fourth terminal of the drive circuit 323, and is used to allow current to flow unidirectionally from the second terminal of the voltage regulator circuit 332 to the fourth terminal of the drive circuit 323. The first terminal of the second filter circuit 334 is coupled between the unidirectional conduction unit 333 and the fourth terminal of the drive circuit 323, and the second terminal is used to be coupled to the ground terminal PGND.

[0126] In this embodiment, since the voltage output of the voltage regulator circuit may still fluctuate, the second filter circuit stabilizes the voltage output of the voltage regulator circuit to provide a stable power supply to the drive circuit. When the AC power supply changes from an on-line state to an off-line state, a certain amount of residual voltage remains in the second filter circuit, which may cause backflow and damage the voltage regulator circuit. By setting a unidirectional conduction unit between the voltage regulator circuit and the second filter circuit, current can only flow from the voltage regulator circuit to the drive circuit, preventing backflow and further improving the reliability of the charging circuit.

[0127] For example, such as Figure 8 As shown, the unidirectional conduction unit 333 includes an eighth diode D8. The second filter circuit 334 includes a second capacitor C2. The anode of the eighth diode D8 is coupled to the second terminal of the third transistor Q3, and the cathode is coupled to the first terminal of the second capacitor C2 and the fourth terminal of the drive circuit 323. The second terminal of the second capacitor C2 is used to couple to the ground terminal PGND.

[0128] In one embodiment, the fifth terminal of the driving circuit 323 is coupled to the input or output terminal of the first filter circuit 20, and is used to keep the first switching unit 31 on when the third DC voltage at the input or output terminal of the first filter circuit 20 is greater than a preset voltage.

[0129] In this embodiment, by coupling the fifth terminal of the driving circuit to the input or output terminal of the first filter circuit, the first switching unit can be kept on to charge the electronic device when the AC voltage of the AC power supply is stable, thereby improving the reliability of the charging circuit.

[0130] For example, the fifth terminal of the drive circuit 323 can be a voltage detection terminal VS. The fifth terminal of the drive circuit 323 can be coupled to the first terminal of the first electrolytic capacitor EC1 or to the first terminal of the second electrolytic capacitor EC2.

[0131] For example, the preset voltage can range from 80V to 200V. The preset voltage can be 100V, 120V, 150V, etc.

[0132] For example, when the third DC voltage is less than or equal to the preset voltage, the drive circuit 323 keeps the first switching unit 31 open to avoid the inability to charge the electronic device stably.

[0133] For example, the sixth terminal of the drive circuit 323 is also used to be coupled to the ground terminal PGND. The sixth terminal of the drive circuit 323 can be the common terminal GND.

[0134] In one embodiment, the charging circuit further includes a thermistor NTC. The thermistor NTC is coupled between the AC power supply AC and the input terminal of the first rectifier circuit 10.

[0135] In this embodiment, because the insertion speed of the AC power socket varies when the user inserts the charging device, the rate of change in contact impedance also varies. To avoid electrical sparks caused by excessively slow contact impedance change, a thermistor is coupled between the AC power supply and the input terminal of the first rectifier circuit to limit the inrush current, thereby improving the service life of the charging device.

[0136] For example, the first terminal of the thermistor NTC is coupled to the second terminal of the AC power supply AC, and the second terminal is coupled to the anode of the sixth diode D6 and the second input terminal of the common-mode inductor LF. The thermistor NTC can be a negative temperature coefficient thermistor.

[0137] An exemplary embodiment of this disclosure provides a charging circuit, such as Figure 8As shown, the charging circuit includes a fuse F, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, a seventh diode D7, an eighth diode D8, a first Zener diode ZD1, a second Zener diode ZD2, a first transistor Q1, a second transistor Q2, a third transistor Q3, a first capacitor C1, a second capacitor C2, a first electrolytic capacitor EC1, a second electrolytic capacitor EC2, a third electrolytic capacitor EC3, a common-mode inductor LF, a filter inductor L, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a thermistor NTC, and a flyback circuit. The first terminal of the fuse F is coupled to the first terminal of the AC power supply AC, and the second terminal is coupled to the anode of the fifth diode D5 and the first input terminal of the common-mode inductor LF. The first terminal of the thermistor NTC is coupled to the second terminal of the AC power supply, and the second terminal is coupled to the anode of the sixth diode D6 and the second input terminal of the common-mode inductor LF. The cathode of the fifth diode D5 is coupled to the cathode of the sixth diode D6 and the first terminal of the second resistor R2. The first output terminal of the common-mode inductor LF is coupled to the anode of the first diode D1 and the cathode of the second diode D2, and the second output terminal is coupled to the anode of the third diode D3 and the cathode of the fourth diode D4. The cathode of the first diode D1 is coupled to the cathode of the third diode D3, the first terminal of the sixth resistor R6, and the first terminal of the first transistor Q1. The anode of the second diode D2 is coupled to the anode of the fourth diode D4, the second terminal of the first electrolytic capacitor EC1, the second terminal of the second electrolytic capacitor EC2, and the ground terminal PGND. The second terminal of the first transistor Q1 is coupled to the first terminal of the first electrolytic capacitor EC1, the first terminal of the filter inductor L, and the voltage detection terminal VS of the drive circuit 323. The second terminal of the filter inductor L is coupled to the first terminal of the second electrolytic capacitor EC2. The flyback circuit is coupled between the second electrolytic capacitor EC2 and the electronic device. The sampling terminal RSV of the drive circuit 323 is coupled to the high-voltage start-up terminal HV and the first terminal of the third resistor R3. The second terminal of the second resistor R2 is coupled to the second terminal of the third resistor R3. The drive terminal DRI of the drive circuit 323 is coupled to the first terminal of the first resistor R1. The second terminal of the first resistor R1 is coupled to the first terminal of the first capacitor C1 and the cathode of the first Zener diode ZD1. The second terminal of the first capacitor C1 is used to couple to the ground terminal PGND. The anode of the first Zener diode ZD1 is coupled to the control terminal of the second transistor Q2. The first terminal of the second transistor Q2 is coupled to the first terminal of the seventh resistor R7, and the second terminal is used to couple to the ground terminal PGND. The second terminal of the seventh resistor R7 is coupled to the second terminal of the sixth resistor R6 and the control terminal of the first transistor Q1. In the flyback circuit, the first terminal of the auxiliary winding TB of the transformer is used to couple to the ground terminal PGND, and the second terminal is coupled to the first terminal of the fifth resistor R5.The second terminal of the fifth resistor R5 is coupled to the anode of the seventh diode D7. The cathode of the seventh diode D7 is coupled to the first terminal of the third electrolytic capacitor EC3, the first terminal of the fourth resistor R4, and the first terminal of the third transistor Q3. The second terminal of the third electrolytic capacitor EC3 is coupled to the anode of the second Zener diode ZD2 and the ground terminal PGND. The second terminal of the fourth resistor R4 is coupled to the control terminal of the third transistor Q3 and the cathode of the second Zener diode ZD2. The second terminal of the third transistor Q3 is coupled to the anode of the eighth diode D8. The cathode of the eighth diode D8 is coupled to the first terminal of the second capacitor C2 and the power supply terminal VCC of the drive circuit 323. The second terminal of the second capacitor C2 and the common terminal GND of the drive circuit 323 are both used to couple to the ground terminal PGND. Because the contact impedance of the charging device is relatively small after being plugged into the AC power socket, the timing of the larger contact impedance and the surge current is staggered by delaying the process to avoid electric sparks, thereby improving the service life of the charging device.

[0138] An exemplary embodiment of this disclosure provides a charging device, which includes the charging circuit described above.

[0139] An exemplary embodiment of this disclosure provides a charging method, which can be applied, for example, to the circuit structure described above, such as... Figure 9 As shown, the charging method includes:

[0140] S100. When the state of the AC power supply changes from unconnected to connected, the first rectifier circuit and the first filter circuit are turned on after a delay. The first rectifier circuit is used to convert the AC voltage of the AC power supply into the first DC voltage, and the first filter circuit is used to filter the first DC voltage.

[0141] In this embodiment, when the charging device is not plugged into the AC power socket, the AC power supply is in an unconnected state. When the charging device is plugged into the AC power socket, the AC power supply is in a connected state. During the transition from an unconnected to a connected state, the charging device is in the process of being plugged into the AC power socket, and the contact resistance first increases and then decreases. A delayed activation of the first rectifier circuit and the first filter circuit delays the generation of the inrush current generated by the first filter circuit, thus staggering the timing of the large inrush current and the contact resistance generation. By delaying the generation of the large contact resistance and the inrush current, large energy sparks are avoided, thereby improving the lifespan of the charging device.

[0142] In one embodiment, the first switching unit is coupled between the first rectifier circuit and the first filter circuit. The delayed activation of the first rectifier circuit and the first filter circuit in step S100 is determined as follows:

[0143] The first switching unit is turned on after a delay.

[0144] In this embodiment, the first rectifier circuit and the first filter circuit are turned on by delaying the first switching unit, which simplifies the method of delaying the generation of the inrush current and reduces the complexity of charging control.

[0145] In one embodiment, the first terminal of the second switching unit is coupled to the control terminal of the first switching unit, and the second terminal of the second switching unit is used to be coupled to the ground terminal. The time-delayed conduction of the first switching unit in the above steps can be determined in the following way:

[0146] The delayed drive signal is output to the control terminal of the second switching unit.

[0147] In this embodiment, since the driving circuit and the delay circuit are integrated into one circuit, the driving circuit can directly output the delayed driving signal. By outputting the delayed driving signal to the control terminal of the second switching unit, the second switching unit indirectly controls the first switching unit to turn on to avoid charging circuit failure, thereby improving the reliability of charging control.

[0148] In one embodiment, the first terminal of the second switching unit is coupled to the control terminal of the first switching unit, and the second terminal of the second switching unit is used to be coupled to the ground terminal. The time-delayed activation of the first switching unit in the above steps can also be determined in the following way:

[0149] A drive signal is output to the delay circuit so that the drive signal is delayed and then output to the control terminal of the second switching unit.

[0150] The delay circuit is coupled to the control terminal of the second switching unit.

[0151] In this embodiment, since the driving circuit and the delay circuit are separated into two circuits, the driving signal output by the driving circuit needs to be delayed by the delay circuit. By outputting a driving signal to the delay circuit and then outputting a delayed driving signal through the delay circuit, the second switching unit indirectly controls the first switching unit to turn on, thereby avoiding charging circuit failure and improving the reliability of charging control.

[0152] For example, after the delayed activation of the first rectifier circuit and the first filter circuit in step S100, the charging method further includes:

[0153] With the first rectifier circuit and the first filter circuit in operation, the filtered first DC voltage is converted to charge the electronic device.

[0154] In one embodiment, the charging method further includes:

[0155] Detect the third DC voltage at the input or output of the first filter circuit.

[0156] When the third DC voltage is greater than the preset voltage, the first switching unit remains on.

[0157] In this embodiment, a third DC voltage is detected at the input or output of the first filter circuit to determine whether the AC power supply is stable and whether the third DC voltage can be reliably used to charge the electronic device. If the third DC voltage is greater than a preset voltage, the AC power supply is stable and the first DC voltage can be reliably used to charge the electronic device, keeping the first switching unit on. By keeping the first switching unit on when the AC voltage of the AC power supply is stable, abnormal charging of the electronic device is avoided, thereby improving the reliability of charging control.

[0158] For example, after detecting the third DC voltage at the input or output terminal of the first filter circuit in the above steps, the charging method further includes:

[0159] If the third DC voltage is less than or equal to the preset voltage, the first switching unit remains open.

[0160] In one exemplary embodiment, a charging device is provided for implementing the method described above. (Reference) Figure 10 As shown, the charging device may include a time-delay conduction module 100, wherein, during the implementation of the above method,

[0161] The delayed conduction module 100 is configured to delay the conduction of the first rectifier circuit and the first filter circuit when the state of the AC power supply changes from an unconnected state to an connected state. The first rectifier circuit is used to convert the AC voltage of the AC power supply into a first DC voltage, and the first filter circuit is used to filter the first DC voltage.

[0162] In one exemplary embodiment, a charging device is provided, wherein a delay-on module 100 is configured to:

[0163] The first switching unit is turned on after a delay.

[0164] In one exemplary embodiment, a charging device is provided, wherein a delay-on module 100 is configured to:

[0165] The delayed drive signal is output to the control terminal of the second switching unit.

[0166] In one exemplary embodiment, a charging device is provided, wherein a delay-on module 100 is configured to:

[0167] A drive signal is output to the delay circuit so that the drive signal is delayed and then output to the control terminal of the second switching unit.

[0168] In one exemplary embodiment, a charging device is provided, the device further comprising:

[0169] The conversion module is configured to convert the filtered first DC voltage to charge electronic devices when the first rectifier circuit and the first filter circuit are turned on.

[0170] In one exemplary embodiment, a charging device is provided, the device further comprising:

[0171] The detection module is configured to detect a third DC voltage at the input or output of the first filter circuit.

[0172] The holding module is configured to keep the first switching unit on when the third DC voltage is greater than a preset voltage.

[0173] In one exemplary embodiment, a charging device is provided, wherein a holding module is configured to:

[0174] If the third DC voltage is less than or equal to the preset voltage, the first switching unit remains open.

[0175] An exemplary embodiment of this disclosure provides a charging device, which includes a processor and a memory for storing processor-executable instructions. The processor is configured to perform the charging method described above.

[0176] In one exemplary embodiment, an electronic device is provided, such as a mobile phone, a laptop computer, a tablet computer, and a wearable device. The electronic device is charged using a charging device as described above.

[0177] refer to Figure 11 As shown, the electronic device 400 may include one or more of the following components: processing component 402, memory 404, power supply component 406, multimedia component 408, audio component 410, input / output (I / O) interface 412, sensor component 414, and communication component 416.

[0178] Processing component 402 typically controls the overall operation of electronic device 400, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 402 may include one or more processors 420 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 402 may include one or more modules to facilitate interaction between processing component 402 and other components. For example, processing component 402 may include a multimedia module to facilitate interaction between multimedia component 408 and processing component 402.

[0179] Memory 404 is configured to store various types of data to support the operation of electronic device 400. Examples of this data include instructions for any application or method operating on electronic device 400, contact data, phonebook data, messages, pictures, videos, etc. Memory 404 can be implemented by any type of volatile or non-volatile storage terminal 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 storage, flash memory, magnetic disk, or optical disk.

[0180] Power supply component 406 provides power to various components of electronic device 400. Power supply component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to electronic device 400.

[0181] Multimedia component 408 includes a screen that provides an output interface between electronic device 400 and user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of touch or swipe actions but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 408 includes a front-facing camera module and / or a rear-facing camera module. When electronic device 400 is in an operating mode, such as shooting mode or video mode, the front-facing camera module and / or rear-facing camera module may receive external multimedia data. Each front-facing camera module and rear-facing camera module may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0182] Audio component 410 is configured to output and / or input audio signals. For example, audio component 410 includes a microphone (MIC) configured to receive external audio signals when electronic device 400 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 404 or transmitted via communication component 416. In some embodiments, audio component 410 also includes a speaker for outputting audio signals.

[0183] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0184] Sensor assembly 414 includes one or more sensors for providing state assessments of various aspects of electronic device 400. For example, sensor assembly 414 may detect the on / off state of electronic device 400, the relative positioning of components such as the display and keypad of electronic device 400, changes in position of electronic device 400 or a component of electronic device 400, the presence or absence of user contact with electronic device 400, orientation or acceleration / deceleration of electronic device 400, and temperature changes of electronic device 400. Sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 414 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0185] Communication component 416 is configured to facilitate wired or wireless communication between electronic device 400 and other terminals. Electronic device 400 can access wireless networks based on communication standards, such as WiFi, 2G, 3G, 4G, 5G, or combinations thereof. In one exemplary embodiment, communication component 416 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 416 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0186] In an exemplary embodiment, the electronic device 400 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing terminals (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0187] In one exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 404 including instructions, which can be executed by a processor 420 of an electronic device 400 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage terminal, etc. When the instructions in the storage medium are executed by the processor of the terminal, the terminal is able to perform the method shown in the above embodiments.

[0188] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0189] 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 indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0190] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0191] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A charging circuit, characterized in that, The charging circuit includes: A first rectifier circuit, wherein the input terminal of the first rectifier circuit is used to be coupled to an AC power supply, and the first rectifier circuit is used to convert the AC voltage of the AC power supply into a first DC voltage. A first filter circuit, wherein the input terminal of the first filter circuit is coupled to the output terminal of the first rectifier circuit, is used to filter the first DC voltage. A time-delayed conduction circuit is coupled between the output terminal of the first rectifier circuit and the input terminal of the first filter circuit. The time-delayed conduction circuit is used to delay the conduction of the first rectifier circuit and the first filter circuit when the state of the AC power supply changes from an unconnected state to an connected state.

2. The charging circuit according to claim 1, characterized in that, The delayed conduction circuit includes: The first switching unit is coupled between the output terminal of the first rectifier circuit and the input terminal of the first filter circuit. A control circuit is coupled to the control terminal of the first switching unit. The control circuit is used to delay turning on the first switching unit when the state of the AC power supply changes from an unconnected state to an connected state.

3. The charging circuit according to claim 2, characterized in that, The control circuit includes: The second switching unit has a first end coupled to the control end of the first switching unit, and a second end coupled to the grounding end. A delay circuit, wherein the first terminal of the delay circuit is coupled to the control terminal of the second switching unit; A driving circuit, wherein a first terminal of the driving circuit is coupled to a second terminal of the delay circuit, and the driving circuit is used to output a driving signal.

4. The charging circuit according to claim 3, characterized in that, The delay circuit includes: A first resistor, the first end of which is coupled to the first end of the driving circuit; A first capacitor, wherein a first terminal of the first capacitor is coupled to a second terminal of the first resistor, and the second terminal of the first capacitor is used to be coupled to the ground terminal; The first Zener diode has its cathode coupled to the second terminal of the first resistor and the first terminal of the first capacitor, and its anode coupled to the control terminal of the second switching unit.

5. The charging circuit according to claim 3, characterized in that, The second terminal of the driving circuit is coupled to the output terminal of the first rectifier circuit. Wherein, the first rectifier circuit is further configured to start the drive circuit with the first DC voltage; or, The charging circuit also includes: The second rectifier circuit has an input terminal that is coupled to the AC power supply and an output terminal that is coupled to the second terminal of the drive circuit. The second rectifier circuit is used to convert the AC voltage into a second DC voltage and to start the drive circuit with the second DC voltage.

6. The charging circuit according to claim 5, characterized in that, The third terminal of the driving circuit is coupled to the output terminal of the first rectifier circuit; or, The third terminal of the driving circuit is coupled to the output terminal of the second rectifier circuit; The driving circuit is also used to detect the state of the AC power supply.

7. The charging circuit according to claim 5, characterized in that, The charging circuit also includes: An electromagnetic interference filtering circuit is coupled between the AC power supply and the input terminal of the first rectifier circuit. The input terminal of the second rectifier circuit is coupled to both the input terminal of the AC power supply and the input terminal of the electromagnetic interference filter circuit.

8. The charging circuit according to claim 3, characterized in that, The charging circuit also includes: A voltage conversion circuit is provided, wherein the input terminal of the voltage conversion circuit is coupled to the output terminal of the first filter circuit, the output terminal of the voltage conversion circuit is used to couple to an electronic device, and the voltage conversion circuit is used to convert the filtered first DC voltage to charge the electronic device.

9. The charging circuit according to claim 8, characterized in that, The voltage conversion circuit includes a transformer, and the first end of the auxiliary winding of the transformer is used to be coupled to the grounding terminal; The delay-conduction circuit further includes: A power supply circuit, wherein a first terminal of the power supply circuit is coupled to a second terminal of the auxiliary winding, and a second terminal of the power supply circuit is coupled to a fourth terminal of the drive circuit, and the power supply circuit is used to supply power to the drive circuit.

10. The charging circuit according to claim 9, characterized in that, The power supply circuit includes: A third rectifier circuit, wherein the input terminal of the third rectifier circuit is coupled to the second terminal of the auxiliary winding; A voltage regulator circuit, wherein the first terminal of the voltage regulator circuit is coupled to the output terminal of the third rectifier circuit, the second terminal of the voltage regulator circuit is coupled to the fourth terminal of the drive circuit, and the third terminal of the voltage regulator circuit is used to be coupled to the ground terminal.

11. The charging circuit according to claim 10, characterized in that, The power supply circuit also includes: A unidirectional conduction unit is coupled between the second terminal of the voltage regulator circuit and the fourth terminal of the drive circuit. The unidirectional conduction unit is used to allow current to flow unidirectionally from the second terminal of the voltage regulator circuit to the fourth terminal of the drive circuit. The second filter circuit has a first terminal coupled between the unidirectional conduction unit and the fourth terminal of the drive circuit, and a second terminal coupled to the ground terminal.

12. The charging circuit according to claim 3, characterized in that, The fifth terminal of the driving circuit is coupled to the input or output terminal of the first filter circuit. The driving circuit is also used to keep the first switching unit on when the third DC voltage at the input or output terminal of the first filter circuit is greater than a preset voltage.

13. The charging circuit according to any one of claims 1 to 12, characterized in that, The charging circuit also includes: A thermistor is coupled between the AC power supply and the input terminal of the first rectifier circuit.

14. A charging method, characterized in that, The charging method includes: When the AC power supply changes from an unconnected state to an connected state, the first rectifier circuit and the first filter circuit are turned on after a delay. The first rectifier circuit is used to convert the AC voltage of the AC power supply into a first DC voltage, and the first filter circuit is used to filter the first DC voltage.

15. The charging method according to claim 14, characterized in that, The first switching unit is coupled between the first rectifier circuit and the first filter circuit; The delayed-on first rectifier circuit and the first filter circuit include: The first switching unit is turned on after a delay.

16. The charging method according to claim 15, characterized in that, The first end of the second switching unit is coupled to the control end of the first switching unit, and the second end of the second switching unit is used to be coupled to the grounding end; The delayed activation of the first switching unit includes: Output a delayed drive signal to the control terminal of the second switching unit; or, A drive signal is output to the delay circuit so that the drive signal is delayed by the delay circuit and then output to the control terminal of the second switching unit; The delay circuit is coupled to the control terminal of the second switching unit.

17. The charging method according to claim 15 or 16, characterized in that, The charging method further includes: Detect the third DC voltage at the input or output terminal of the first filter circuit; When the third DC voltage is greater than the preset voltage, the first switching unit remains on.

18. A charging device, characterized in that, The charging device includes: A delayed-on module is configured to delay the on-time of a first rectifier circuit and a first filter circuit when the state of the AC power supply changes from an unconnected state to an connected state. The first rectifier circuit is used to convert the AC voltage of the AC power supply into a first DC voltage, and the first filter circuit is used to filter the first DC voltage.

19. A charging device, characterized in that, The charging device includes the charging circuit as described in any one of claims 1 to 13; or, processor; Memory used to store the processor's executable instructions; The processor is configured to perform the charging method as described in any one of claims 14 to 17.

20. A non-transitory computer-readable storage medium, characterized in that, When the instructions in the storage medium are executed by the processor of the terminal, the terminal is able to perform the charging method as described in any one of claims 14 to 17.

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