Charger and control method

Abstract

A charger and control method, comprising: a transformer (240); at least one primary side switch tube (231) for chopping modulation of the voltage input into the transformer; a first control unit (211); a second control unit (212) for generating feedback information based on voltage and / or current information output from the charger output end; a first micro cell (221) connected with the first control unit (211) and the second control unit (212) respectively, for transmitting the feedback information to the first control unit (211); the first control unit (211) is used for outputting a first control signal according to the feedback information, to control the conduction or turn-off of the at least one primary side switch tube (231). The charger has fast driving speed, and the dead time can be accurately controlled; meanwhile, the transmission of the parasitic capacitance generated by the first switch tube can also be isolated. Since the first micro cell (221) is used for isolated communication, fast bidirectional communication can be realized, so that the rapidity, flexibility and safety of communication can be improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of charging, and more particularly, to a charger and a control method. BACKGROUND

[0002] The charger is generally composed of a transformer, a control unit, a driving unit, a MOS tube, etc.

[0003] When the driving control of the MOS tube is performed through the control unit, there are problems such as that the driving speed is not fast enough, and the dead time cannot be accurately controlled. SUMMARY

[0004] Embodiments of the present application provide a charger and a control method to solve the problems in the related art.

[0005] In a first aspect, a charger is provided, comprising: a transformer; at least one primary side switch tube, configured to perform chopping modulation on a voltage input to the transformer; a first control unit; a second control unit, configured to obtain voltage and / or current information output by an output end of the charger; a first micro unit, connected with the first control unit and the second control unit respectively, and configured to transmit the voltage and / or current information to the first control unit; and the first control unit, configured to output a first control signal according to the voltage and / or current information, so as to control conduction or turn-off of the at least one primary side switch tube.

[0006] In a second aspect, a charger is provided, comprising: a transformer; at least one primary side switch tube, connected with a primary side of the transformer; at least one secondary side switch tube, connected with a secondary side of the transformer; a first control unit, configured to output a first control signal, the first control signal being used to control conduction or turn-off of the at least one primary side switch tube; a second control unit, configured to output a second control signal, the second control signal being used to control conduction or turn-off of the at least one secondary side switch tube; and a first micro unit, connected with the first control unit and the second control unit respectively, and configured to transmit a synchronization signal between the first control unit and the second control unit, the synchronization signal being used to synchronize the first control signal and the second control signal.

[0007] In a third aspect, a control method is provided, which is applied to a charger including a transformer, at least one primary side switch tube, a first control unit, a second control unit and a first micro unit, and the method comprises: the second control unit acquires voltage and / or current information output by an output end of the charger; the first micro unit transmits the voltage and / or current information to the first control unit; and the first control unit outputs a first control signal according to the voltage and / or current information, so as to control turn-on or turn-off of the at least one primary side switch tube.

[0008] In a fourth aspect, a control method is provided, which is applied to a charger including a transformer, at least one first primary side switch tube, at least one secondary side switch tube, a first control unit, a second control unit and a first micro unit, and the method comprises: the first control unit outputs a first control signal, which is used to control turn-on or turn-off of the at least one primary side switch tube; the second control unit outputs a second control signal, which is used to control turn-on or turn-off of the at least one secondary side switch tube; and the first micro unit transmits a synchronization signal between the first control unit and the second control unit, which is used to synchronize the first control signal and the second control signal.

[0009] In a fifth aspect, a computer readable storage medium is provided, which is used to store a computer program, and the computer program causes a computer to execute the method in any one of the third aspect or the fourth aspect or the implementation manners thereof.

[0010] In a sixth aspect, a computer program product is provided, which comprises computer program instructions, and the computer program instructions cause a computer to execute the method in any one of the third aspect or the fourth aspect or the implementation manners thereof.

[0011] The charger provided by the embodiment of the present application can convert the first control signal into the first microwave signal by the first transmitting end of the first microwave unit and transmit the first microwave signal to the first receiving end of the first microwave unit in the process of transmitting the control signal, and the first receiving end can convert the first microwave signal into the first control signal after receiving the first microwave signal, so as to control the turn-on and turn-off of the at least one first switch tube by using the converted first control signal. On the one hand, the first transmitting end of the first microwave unit can convert the first control signal into the first microwave signal and quickly transmit the first microwave signal to the first receiving end due to the fast response speed of the first microwave unit, so that the driving speed is fast and the dead time can be accurately controlled, that is, even if the dead time of the first control signal is short, the first switch tube can also be quickly turned on or turned off, and the crosstalk of the circuit cannot be caused. On the other hand, since the transmission of the microwave does not rely on the medium transmission, the distance between the first transmitting end and the first receiving end of the first microwave unit can be set to be far, and the transmission of the parasitic capacitance generated by the first switch tube can be isolated, so that the crosstalk of the circuit can also be avoided. Meanwhile, since the first microwave unit is used for isolation communication, the fast bidirectional communication can be realized, the information such as the driving information, the state information and the control information can be transmitted, the anti-interference performance is high, so that the rapidity, flexibility and safety of the communication can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1a is a schematic structural diagram of a charger provided by an embodiment of the present application;

[0013] Figure 1b is a schematic structural diagram of a charger provided by another embodiment of the present application;

[0014] Figure 2 is a schematic structural diagram of a charger provided by still another embodiment of the present application;

[0015] Figure 3 is a schematic structural diagram of a charger provided by still another embodiment of the present application;

[0016] Figure 4 is a schematic structural diagram of a charger provided by still another embodiment of the present application;

[0017] Figure 5 is a schematic structural diagram of a charger provided by still another embodiment of the present application;

[0018] Figure 6a is a schematic structural diagram of a charger provided by still another embodiment of the present application;

[0019] Figure 6b is a schematic structural diagram of a charger provided by still another embodiment of the present application

[0020] Figure 7This is a schematic structural diagram of a charger provided in another embodiment of this application;

[0021] Figure 8 This is a schematic diagram of the control signals output by the control unit provided in an embodiment of this application;

[0022] Figure 9 This is a schematic structural diagram of a charger provided in another embodiment of this application;

[0023] Figure 10a This is a schematic structural diagram of a charger provided in another embodiment of this application;

[0024] Figure 10b This is a schematic structural diagram of a charger provided in another embodiment of this application;

[0025] Figure 11 This is a schematic flowchart of a control method provided in an embodiment of this application;

[0026] Figure 12 This is a schematic flowchart of a control method provided in another embodiment of this application. Detailed Implementation

[0027] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0028] To better understand this application, the working principle and process of the charger will be described below with reference to Figure 1, which will facilitate subsequent understanding of the solution in this application. However, it should be understood that the following description is only for better understanding of this application and should not impose any special limitations on this application.

[0029] Power conversion devices for small portable electronic devices and appliances, such as adapters, chargers, and car chargers, are generally composed of components such as a casing, transformer, inductor, capacitor, control IC, and PCB board, and are used to convert AC input into DC output.

[0030] like Figure 1a As shown, in one embodiment, the charger may include a primary control module 111, a secondary control module 112, a primary drive unit 121, a synchronous rectification drive unit 122, a primary-side switch 131, a secondary-side switch 132, a transformer 140, and an optocoupler (also known as an optocoupler or optoisolator) 150.

[0031] In an embodiment of the present application, the primary side switch 131 can be used to rectify, filter, and / or modulate the input AC current of the charger. The secondary side switch 132 can be used to synchronize the rectification of the output current of the transformer 140.

[0032] The secondary control module 112 can be used to obtain the voltage / current information of the output of the transformer 140, or the voltage / current information of the output of the charger, and transmit the error information (e.g., the error information can be the difference between the actual output voltage / current information and the required voltage / current information) to the primary control module 111 through the optocoupler 150. The primary control module 111 can convert the error information into the duty cycle or frequency of the PWM control signal, and output the PWM control signal to the primary drive unit 121, thereby driving the primary side switch 131. In this way, the output voltage and current of the transformer 140 can be adjusted and controlled. The synchronous rectification drive unit 122 is used to drive the secondary side switch 132, so that the secondary side switch 132 performs synchronous rectification.

[0033] Referring to Figure 1b In some embodiments, the secondary side switch 132 can also be driven and controlled by the primary control module 111 to achieve synchronous rectification. The primary control module 111 can output the corresponding PWM signal to control the secondary drive unit 123 according to the error information described above, thereby driving the secondary side switch 132.

[0034] The primary side switch 131 can include one or more metal oxide semiconductor field effect transistors (MOSFETs), MOS tubes, for example, the primary side switch 131 can include two MOS tubes or four MOS tubes. The secondary side switch 132 can also include one or more MOS tubes, for example, the secondary side switch 132 can include one MOS tube or two MOS tubes.

[0035] The electronic devices in this application embodiment may include, but are not limited to, satellite or cellular phones; personal communication system (PCS) terminals that can combine cellular radiophones with data processing, fax, and data communication capabilities; personal digital assistants (PDAs) that may include radiophones, pagers, internet / intranet access, web browsers, notebooks, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or handheld receivers or other electronic devices including radiophone transceivers. In some embodiments, the device to be charged may refer to a mobile terminal device, such as a mobile phone or tablet. In some embodiments, the device to be charged mentioned in this application embodiment may refer to a chip system, in which the battery of the device to be charged may or may not be part of the chip system.

[0036] In addition, electronic devices can also include other devices that require charging, such as mobile phones, power banks (e.g., portable chargers, travel chargers), electric vehicles, laptops, drones, tablets, e-readers, e-cigarettes, smart devices awaiting charging, and small electronic products. Smart devices awaiting charging can include, for example, watches, fitness trackers, smart glasses, and robot vacuum cleaners. Small electronic products can include, for example, wireless headphones, Bluetooth speakers, electric toothbrushes, and rechargeable wireless mice.

[0037] like Figure 1a and Figure 1b In the illustrated embodiments, whether the primary-side and secondary-side MOSFETs are driven and controlled independently, or both are driven and controlled by the primary-side control module, the driving speed is not fast enough and the dead time is difficult to control precisely. Furthermore, communication between the primary and secondary sides can only be achieved through optocouplers, and the communication direction is singular, lacking flexibility and unable to transmit more information.

[0038] The charger provided in the application uses a micro-unit to transmit a control signal, so as to improve the driving speed and realize accurate control of dead time. In addition, when the control module outputs a high-frequency control signal, the dead time of the control signal can be set to be relatively short, so as to improve the efficiency and also not affect the crosstalk of the circuit. The first micro-unit is used to control the turn-on and turn-off of the first switch tube, the distance between the first transmitting end and the first receiving end of the first micro-unit can be set to be relatively far, so as to avoid the transmission of the parasitic capacitance generated by the first switch tube, thereby also avoiding the crosstalk of the circuit. At the same time, since the first micro-unit is used for isolation communication, fast bidirectional communication can be realized, and information such as driving information, state information and control information can be transmitted, the anti-interference performance is high, and the rapidity, flexibility and safety of communication can be improved.

[0039] The charger provided in the application will be described in detail below. Figure 2 The charger provided in the application will be described in detail below.

[0040] As shown in Figure 2 The charger 200 provided in the application can include a first control unit 211, a second control unit 212, a first micro-unit 221, at least one first switch tube 231 and a transformer 240.

[0041] The at least one primary side switch tube 231 is used to chop and modulate the voltage input to the transformer 240.

[0042] The at least one primary side switch tube 231 in the application can be used to chop and modulate the voltage input to the transformer 240, for example, the duty cycle of the primary side switch tube 231 can be controlled to change the voltage of the direct current output on the secondary side of the transformer 240.

[0043] The second control unit 212 is used to generate feedback information based on the voltage and / or current information output by the output end of the charger 200.

[0044] The first micro-unit 221 is connected with the first control unit 211 and the second control unit 212 respectively, and is used to transmit the feedback information to the first control unit 211.

[0045] The first micro-unit 221 in the application can transmit the feedback information obtained by the second control unit 212 to the first control unit 211. The feedback information can be the actual voltage value and / or current value of the output end of the charger, or the difference between the actual output voltage value and / or current value and the expected received voltage value and / or current value.

[0046] The first control unit 211 is used to output a first control signal according to the feedback information, so as to control the turn-on or turn-off of the at least one primary side switch tube 231.

[0047] In the embodiment, the feedback information output by the output end of the charger 200 can be fed back to the first control unit 211 by the second control unit 212 through the first microwave unit 221, and the first control unit 211 can output a first control signal according to the feedback information to control the turn-on or turn-off of the at least one primary side switch tube 231.

[0048] In the process of transmitting the control signal, the first transmitting end of the first microwave unit can convert the first control signal into a first microwave signal and transmit the first microwave signal to the first receiving end of the first microwave unit, and the first receiving end can convert the first microwave signal into the first control signal after receiving the first microwave signal, so that the converted first control signal can be used to control the turn-on and turn-off of the at least one first switch tube. On the one hand, since the first microwave unit has a fast response speed, the first transmitting end thereof can convert the first control signal into a first microwave signal and quickly transmit the first microwave signal to the first receiving end, so that the driving speed is fast and the dead time can be accurately controlled. Even if the dead time of the first control signal is short, the first switch tube can also be quickly turned on or turned off, and the crosstalk of the circuit can be avoided. On the other hand, since the transmission of the microwave does not rely on medium transmission, the distance between the first transmitting end and the first receiving end of the first microwave unit can be set to be relatively far, and the transmission of the parasitic capacitance generated by the first switch tube can be isolated, so that the crosstalk of the circuit can also be avoided. At the same time, since the first microwave unit is used for isolation communication, fast bidirectional communication can be realized, and information such as driving information, state information and control information can be transmitted, so that the anti-interference performance is high, and the rapidity, flexibility and safety of the communication can be improved.

[0049] Optionally, in some embodiments, as shown in Figure 3 The charger 200 can further include at least one secondary side switch tube 232.

[0050] The at least one secondary side switch tube 232 is configured to perform synchronous rectification on the voltage output by the transformer 240, and the first control unit is further configured to output a second control signal to control the turn-on or turn-off of the at least one secondary side switch tube 231.

[0051] Optionally, in some embodiments, the first control unit 211 is further configured to output the second control signal to control the turn-on or turn-off of the at least one secondary side switch tube 231 according to the voltage / current information.

[0052] In the embodiment, the charger 200 can further include at least one secondary side switch tube 232, and the secondary side switch tube 232 can perform synchronous rectification on the voltage output by the transformer 240.

[0053] The feedback information in the embodiment of the present application is the voltage difference and / or current difference of the DC current output by the transformer 240. The voltage difference can be the difference between the actual output voltage of the secondary side of the transformer 240 and the expected received voltage; the current difference can be the difference between the actual output current of the secondary side of the transformer 240 and the expected received current.

[0054] For example, assuming that the feedback voltage difference of the DC current received by the first control unit 211 is negative, it indicates that the voltage value output by the secondary side of the transformer 240 is small at this time, and the first control unit 211 can control to increase the output duration of the high level in a period, so that the duration of the primary side switch tube 231 in the conduction state is increased, thereby increasing the voltage value of the DC current output by the secondary side of the transformer; assuming that the feedback voltage difference of the DC current received by the first control unit 211 is positive, it indicates that the voltage value output by the secondary side of the transformer 240 is large at this time, and the first control unit 211 can control to reduce the output duration of the high level in a period, so that the duration of the primary side switch tube 231 in the conduction state is reduced, thereby reducing the voltage value of the DC current output by the secondary side of the transformer.

[0055] In some implementations, the feedback information in the embodiment of the present application can also be the voltage value and / or current value of the DC current output by the secondary side of the transformer 240, and the first micro unit 221 can feed back the voltage value and / or current value to the first control unit 211, and the first control unit 211 can compare the received voltage value and / or current value with the preset voltage value and / or current value. Assuming that the first control unit 211 compares the feedback voltage value of the DC current with the preset voltage value and determines that the voltage value of the DC current output by the secondary side of the transformer is small at this time, the first control unit 211 can control to increase the output duration of the high level in a period, so that the duration of the primary side switch tube 231 in the conduction state is increased, thereby increasing the voltage value of the DC current output by the secondary side of the transformer; if the first control unit 211 compares the feedback voltage value of the DC current with the preset voltage value and determines that the voltage value of the DC current output by the secondary side of the transformer is large at this time, the first control unit 211 can control to reduce the output duration of the high level in a period, so that the duration of the primary side switch tube 231 in the conduction state is reduced, thereby reducing the voltage value of the DC current output by the secondary side of the transformer.

[0056] It can be understood that the on-time of the at least one primary side switch tube 231 can be related to the direct current output on the secondary side of the transformer 240, that is, the longer the on-time of the at least one primary side switch tube 231, the greater the direct current output on the secondary side of the transformer 240; the shorter the on-time of the at least one primary side switch tube 231, the smaller the direct current output on the secondary side of the transformer 240.

[0057] In the embodiment of the application, the first microwave unit 221 can also include a transmitting end and a receiving end. The transmitting end of the first microwave unit 221 can convert the digital signal sent by the second control unit 212 into a microwave signal and transmit the microwave signal to the receiving end of the first microwave unit 221. After the third receiving end receives the microwave signal, the third receiving end can convert the microwave signal into a digital signal and send the digital signal to the first control unit 211, so that the first control unit 211 can control the output time of the high level and / or low level of the first control signal based on the received signal.

[0058] Optionally, in some embodiments, as shown in Figure 4 The charger 200 can further include a second microwave unit 222 and a first drive module 251.

[0059] The second microwave unit 222 is connected to the first control unit 211.

[0060] The first drive module 251 is connected to the second microwave unit 222 and the at least one primary side switch tube 231, respectively.

[0061] The second microwave unit 222 is configured to transmit the first control signal output by the first control unit 211 to the first drive module 251, so that the first drive module 251 drives the at least one primary side switch tube 231 to turn on or turn off.

[0062] The charger 200 in the embodiment of the application can further include a second microwave unit 222 and a first drive module 251. The transmitting end of the second microwave unit 222 can convert the first control signal output by the first control unit 211 into a microwave signal and transmit the microwave signal to the receiving end of the second microwave unit 222. After the receiving end receives the microwave signal, the receiving end can convert the microwave signal into the first control signal and transmit the first control signal to the first drive module 251, so as to drive or control the at least one primary side switch tube to turn on or turn off.

[0063] Optionally, in some embodiments, as shown in Figure 5 The charger 200 can further include a third microwave unit 223 and a second drive module 252.

[0064] The third microwave unit 223 is connected to the first control unit 211.

[0065] The second drive module 252 is connected with the third microwave unit 223 and the at least one secondary side switch tube 232 respectively.

[0066] The third microwave unit 223 is configured to transmit the second control signal output by the first control unit 211 to the second drive module 252, so that the second drive module 252 drives the at least one secondary side switch tube 232 to be turned on or turned off.

[0067] In the embodiment of the present application, the first control unit 211 can also control the at least one secondary side switch tube 232 to be turned on or turned off. For example, the transmitting end of the third microwave unit 223 can convert the control signal output by the first control unit 211 into a microwave signal and transmit the microwave signal to the receiving end of the second microwave unit 222. The receiving end of the second microwave unit 222 can convert the microwave signal into a control signal and transmit the control signal to the second drive module 252, so as to drive or control the at least one secondary side switch tube to be turned on or turned off.

[0068] The following will be described in detail. Figure 6a and Figure 6b respectively.

[0069] In the embodiment of the present application, as shown in Figure 6a , the drive circuit 200 can further include a first drive module 251 and a second drive module 252. The first drive module 251 can amplify the control signal output by the receiving end of the first microwave unit 221, so that the amplified signal can control the primary side switch tube 231 to be turned on or turned off. The second drive module 252 can amplify the control signal output by the third microwave unit 223, so that the amplified signal can control the secondary side switch tube 232 to be turned on or turned off.

[0070] It can be understood that the first drive module 251 or / and the second drive module 252 in the embodiment of the present application can be used to amplify the control signal output by the first control unit 211, that is, the control ability of the control signal can be increased, so that the control signal can control the switch tube.

[0071] The drive module in the embodiment of the present application can be a charge pump bootstrap control circuit, a control chip, etc.

[0072] As Figure 6bFig. 6 is a schematic structural diagram of a charger provided by another embodiment of the present application. In the embodiment, after the second control unit 212 sends the collected feedback information to the first control unit 211 through the first microwave unit 221, the first control unit 211 can control the output time of the high level and / or low level of the first control signal according to the received feedback information, so that the second drive module 252 can determine whether to send the drive signal to open the at least one second switch tube 232 according to whether the at least one switch tube 231 connected to the primary side of the transformer is turned on.

[0073] The second drive module 252 in the embodiment can be a synchronous rectification drive unit.

[0074] It should be understood that in the embodiment, the second control unit 212 can be connected to the first control unit 211 through the first microwave unit 221. Figures 2-4 In the embodiment, the second control unit 212 can be connected to the first control unit 211 through the second microwave unit 222. Figure 2 The drive unit thereof can be located between the first control unit 211 and the at least one primary side switch tube 231, so as to amplify the control signal output by the first control unit 211, so that the first control unit 211 can control the at least one primary side switch tube 231.

[0075] For the embodiment, the drive unit thereof can be located between the first control unit 211 and the at least one primary side switch tube 231, so as to amplify the control signal output by the first control unit 211, so that the first control unit 211 can control the at least one primary side switch tube 231. Figures 3-4 For the embodiment, the drive unit thereof can be located between the first control unit 211 and the at least one primary side switch tube 231, so as to amplify the control signal output by the first control unit 211, so that the first control unit 211 can control the at least one primary side switch tube 231.

[0076] The above describes that the transmitting end of the microwave unit in the embodiment can convert the control signal into a microwave signal and transmit the microwave signal to the receiving end, and the receiving end can convert the microwave signal into a control signal to control the turn-on or turn-off of the switch tube, so that the transformer connected to the switch tube can continuously store and release energy. In addition, the microwave unit in the embodiment can also be used to isolate the parasitic capacitance generated by the switch tube, which will be described in detail below.

[0077] Optionally, in some embodiments, the second microwave unit 222 is further used for transmitting the first control signal to control the turn-on or turn-off of the at least one primary side switch tube 231, and isolating the parasitic capacitance generated by the at least one primary side switch tube 231.

[0078] Optionally, in some embodiments, the third micro-unit 223 is further configured to transmit the second control signal to control the turn-on or turn-off of the at least one secondary-side switch tube 232 and isolate the parasitic capacitance generated by the at least one secondary-side switch tube 232.

[0079] In the embodiment, the first control unit 211 can output a high-level signal to transmit a signal to the at least one primary-side switch tube 231 through the second micro-unit 222 to control the turn-on of the primary-side switch tube 231; the first control unit 211 can also output a high-level signal to transmit a signal to the at least one secondary-side switch tube 232 through the third micro-unit 223 to control the turn-on of the secondary-side switch tube 232.

[0080] In the embodiment, the primary side of the transformer 240 can refer to the side connected with the at least one primary-side switch tube 231, and the secondary side of the transformer 240 can refer to the side connected with the at least one secondary-side switch tube 232.

[0081] In the embodiment, the second micro-unit 222 can also isolate the parasitic capacitance generated by the at least one primary-side switch tube 231 in the process of controlling the turn-on or turn-off of the at least one primary-side switch tube 231, that is, the second micro-unit 222 can isolate the transmission of the parasitic capacitance generated by the at least one primary-side switch tube 231 to other circuit modules, for example, to the at least one secondary-side switch tube 232, so that the crosstalk of the circuit can be avoided; the third micro-unit 223 can also isolate the parasitic capacitance generated by the at least one secondary-side switch tube 232 in the process of controlling the turn-on or turn-off of the at least one secondary-side switch tube 232, that is, the third micro-unit 223 can isolate the transmission of the parasitic capacitance generated by the at least one secondary-side switch tube 232 to other circuit modules, for example, to the at least one primary-side switch tube 231, so that the crosstalk of the circuit can be avoided.

[0082] As shown in FIG. 1, a schematic structural diagram of a charger is provided in the embodiment. Figure 6a As shown in FIG. 1, a schematic structural diagram of a charger is provided in the embodiment. Figure 4 As shown in FIG. 1, a schematic structural diagram of a charger is provided in the embodiment.

[0083] In the case that the first control unit 211 outputs a high level signal, if the pins of the MOS tube 231a and the N-channel MOS tube 231c are opened, the high level signal can be converted into a microwave signal by the transmitting end of the second microwave unit 222 and the microwave signal can be transmitted to the receiving end of the second microwave unit 222. After receiving the microwave signal, the receiving end can convert the microwave signal into a first control signal and transmit the first control signal to the N-channel MOS tube 231a and the N-channel MOS tube 231c. At this time, since the gate voltage of the N-channel MOS tube 231a is higher than the source voltage and the gate voltage of the N-channel MOS tube 231c is higher than the source voltage, the N-channel MOS tube 231a and the N-channel MOS tube 231c can be turned on.

[0084] In the case that the first control unit 211 outputs a high level signal, if the pins of the MOS tube 231a and the N-channel MOS tube 231c are opened, the high level signal can be converted into a microwave signal by the transmitting end of the second microwave unit 222 and the microwave signal can be transmitted to the receiving end of the second microwave unit 222. After receiving the microwave signal, the receiving end can convert the microwave signal into a first control signal and transmit the first control signal to the N-channel MOS tube 231a and the N-channel MOS tube 231c. At this time, since the gate voltage of the N-channel MOS tube 231a is higher than the source voltage and the gate voltage of the N-channel MOS tube 231c is higher than the source voltage, the N-channel MOS tube 231a and the N-channel MOS tube 231c can be turned on.

[0085] It should be understood that the full-bridge circuit diagram in the embodiments of the present application is not limited to the one shown in Figure 6a or Figure 6b and should not be particularly limited to the present application.

[0086] Optionally, in some embodiments, the first microwave unit and / or the second microwave unit and / or the third microwave unit include an Integrated Circuit (IC) chip, and an Extremely High Frequency (EHF) antenna is packaged in the IC chip.

[0087] The EHF antenna is packaged in the IC chip in the embodiments of the present application, including a transmitting antenna and a receiving antenna, i.e., the transmitting end and the receiving end in the embodiments of the present application. Thus, the microwave unit can realize high-speed data wireless transmission (for example, the transmission speed can reach up to 6 GB / s) based on a high carrier frequency (for example, 60 GHz).

[0088] In the embodiments of the present application, it can be understood that, taking the first microwave unit 221 as an example, since the first transmitting end of the first microwave unit 221 can convert the first control signal output by the first control unit 211 into a first microwave signal, and the microwave signal can propagate without relying on a medium in the process of propagation, the propagation speed in vacuum is equivalent to the speed of light, therefore, after the first control signal is converted into the first microwave signal by the first transmitting end of the first microwave unit 221, the first microwave signal can be quickly transmitted to the first receiving end of the first microwave unit 221, and the first receiving end of the first microwave unit 221 converts the first microwave signal into the first control signal again, so that the at least one first switch tube 231 can be quickly responded.

[0089] The first switch tube 231 and / or the second switch tube 232 in the embodiments of the present application can be an Insulated Gate Bipolar Transistor (IGBT) or a MOS tube or a triode, and the present application does not make a specific limitation thereto.

[0090] Optionally, in some embodiments, the charger 200 can further include a first isolation unit and a second isolation unit.

[0091] The first isolation unit is configured to isolate the parasitic capacitance generated by the at least one primary side switch tube 231, and the second isolation unit is configured to isolate the parasitic capacitance generated by the at least one secondary side switch tube 232, wherein one end of the first isolation unit is connected with the second microwave unit 222, and the other end is connected with the at least one primary side switch tube 231, one end of the second isolation unit is connected with the third microwave unit 223, and the other end is connected with the at least one secondary side switch tube 232.

[0092] In the embodiments of the present application, the first isolation unit can isolate the transmission of the parasitic capacitance generated by the at least one primary side switch tube 231 at a high frequency to other circuit modules, for example, the at least one secondary side switch tube 232, and the second isolation unit can isolate the transmission of the parasitic capacitance generated by the at least one secondary side switch tube 232 at a high frequency to other circuit modules, for example, the at least one primary side switch tube 231, so that the crosstalk of the circuit can be further avoided.

[0093] In this embodiment, since microwaves have a high transmission speed, the distance between the first transmitting end and the first receiving end of the second microwave unit 222 can be set to be relatively far, for example, greater than the first threshold. Therefore, the second microwave unit 221 itself can isolate the parasitic capacitance generated by the primary-side switch 231 from transmission to other circuit modules, such as the secondary-side switch 232. The setting of the first isolation unit can further isolate the parasitic capacitance generated by the primary-side switch 231 from transmission to other circuit modules, such as the secondary-side switch 232.

[0094] Similarly, the distance between the third transmitter and the third receiver of the third microwave unit 223 can also be set to be relatively far, for example, greater than the second threshold. Therefore, the third microwave unit 223 itself can isolate the parasitic capacitance generated by the secondary-side switch 232 from transmission to other circuit modules, such as the primary-side switch 231. The setting of the second isolation unit can further isolate the parasitic capacitance generated by the secondary-side switch 232 from transmission to other circuit modules, such as the primary-side switch 231.

[0095] Optionally, in some implementations, such as Figure 7 As shown, the first control unit 211 includes: a first control subunit 211a, connected to the second microwave unit 222, for outputting the first control signal to the second microwave unit 222, and for controlling the output time of the first control signal; and a second sub-control unit 211b, connected to the third microwave unit 223, for outputting the second control signal to the third microwave unit 223, and for controlling the output time of the second control signal.

[0096] In the embodiments of the present application, the second microwave unit 222 and the third microwave unit 223 can also transmit control signals through two control units respectively. For example, the first sub-control unit 211a can transmit a first control signal to the second microwave unit 222. The transmitting end of the second microwave unit 222 can convert the first control signal transmitted by the first sub-control unit 211a into a first microwave signal and transmit it to the receiving end of the second microwave unit 222. After receiving the first microwave signal, the receiving end can convert the first microwave signal into the first control signal and transmit the first control signal to the primary side switch tube 231 to control the conduction or turn-off of the primary side switch tube 231. The second sub-control unit 211b can transmit a second control signal to the third microwave unit 223. The third transmitting end of the third microwave unit 223 can convert the second control signal transmitted by the second sub-control unit 211b into a second microwave signal and transmit it to the third receiving end of the third microwave unit 223. After receiving the second microwave signal, the third receiving end can convert the second microwave signal into the second control signal and transmit the second control signal to the secondary side switch tube 232 to control the conduction or turn-off of the secondary side switch tube 232.

[0097] It should be noted that the first sub-control unit 211a and the second sub-control unit 211b can communicate with each other, so that the first sub-control unit 211a and the second sub-control unit 211b can output control signals more accurately.

[0098] Optionally, in some embodiments, the dead time of the first control signal and / or the second control signal is less than a first threshold.

[0099] In combination Figure 8 It is explained that, in the time period (t1-t2), the first sub-control unit 211a can output a high level to control the primary side switch tube 231 to be in the on state. At the time point t2, the first sub-control unit 211a can output a low level to control the primary side switch tube 231 to be in the off state. From Figure 8 It can be seen from the above that, when the first sub-control unit 211a outputs a low level at the time point t2, the second sub-control unit 211b does not output a low level instantaneously, but starts to output a low level at the time point t3 to control the conduction of the secondary side switch tube 232, so that the energy stored in the primary side of the transformer 240 can be released to the secondary side of the transformer 240.

[0100] The time period (t2-t3) is referred to as dead time, during which the first sub-control unit 211a can output a low level and the second sub-control unit 211b can output a high level, so that the primary side switch tube 231 is completely turned off before the secondary side switch tube 232 is controlled to be turned on, to avoid the parasitic capacitance generated due to the early turn-on of the secondary side switch tube 232 when the energy stored in the primary side of the transformer 240 is released to the secondary side, from being transmitted to the primary side switch tube 231, thus causing the mis-turn-on of the primary side switch tube 231 and the crosstalk of the circuit.

[0101] In the embodiment of the present application, the first sub-control unit 211a and the second sub-control unit 211b can communicate with each other. For example, the first sub-control unit 211a can inform the first sub-control unit 211a to stop outputting a high level at the time point t2 and start outputting a low level, and the second sub-control unit 211b can start outputting a low level after a preset dead time after receiving the notification of the first sub-control unit 211a, that is, output a low level at the time point t3, to avoid the parasitic capacitance generated due to the early turn-on of the secondary side switch tube 232 when the energy stored in the primary side of the transformer 240 is released to the secondary side, from being transmitted to other circuit modules, for example, the primary side switch tube 231, thus causing the crosstalk of the circuit.

[0102] Alternatively, the first sub-control unit 211a can inform the second sub-control unit 211b to output a low level at the time point t3 at any time point during the dead time (t2-t3) after the first sub-control unit 211a stops outputting a high level at the time point t2, to avoid the parasitic capacitance generated due to the early turn-on of the secondary side switch tube 232 when the energy stored in the primary side of the transformer 240 is released to the secondary side, from being transmitted to other circuit modules, for example, the primary side switch tube 231, thus causing the crosstalk of the circuit.

[0103] In the embodiment of the present application, the first sub-control unit 211a can also receive the synchronization signal sent by the second sub-control unit 211b to determine the output time of the high level and / or the low level.

[0104] Optionally, in some embodiments, the preset frequency of the first control signal and / or the second control signal is greater than a second threshold value.

[0105] The preset frequency of the first control signal and / or the second control signal in the embodiment of the present application can be greater than a second threshold value. Taking the first control signal as an example, for example, if the second threshold value is 200 KHz, assuming that the preset frequency of the first control signal is 250 KHz, that is, the sum of the turn-on and turn-off time of the two switch tubes can be 4us. In combination with the above description, the first control signal can be output at a frequency of 250 KHz, and the second control signal can be output at a frequency of 200 KHz. Figure 7 and Figure 8It is explained that the first sub-control unit 211a outputs high level in the time period (t1-t2), if the dead time is 0.4us, the time period (t1-t2) in the figure is 1.6us, and the time period (t2-t3) in the figure is 0.4us. Then, the primary side switch tube 231 is turned on for 1.6us in a period, and the first sub-control unit 211a can output low level in the dead time of 0.4us in the time period (t2-t3) to make the primary side switch tube 231 completely off. After the primary side switch tube 231 is completely off, the second sub-control unit 211b starts to output low level to make the secondary side switch tube 232 conduct.

[0106] It can be understood that when the second sub-control unit 211b outputs low level in the time period (t3-t4), the first sub-control unit 211a can also output low level to make the primary side switch tube 231 in the off state, so that the circuit crosstalk caused by the mis-conduction of the primary side switch tube 231 can be avoided.

[0107] In some implementations, the preset frequency of the first control signal and the preset frequency of the second control signal can be different, which is not limited in the application.

[0108] It should be understood that the above numerical values are only illustrative, and other numerical values can also be used, which should not be particularly limited in the application.

[0109] It should also be understood that the greater the preset frequency in the embodiment of the application, that is, the smaller the period of the signal output by the control unit, the smaller the dead time can be set, and the micro-unit in the embodiment of the application can quickly transmit the signal to the switch tube, so that the switch tube can be quickly turned on or off. In addition, in the case of greater frequency, the parasitic capacitance generated by the switch tube is more obvious, and because the distance between the transmitting end and the receiving end of the micro-unit can be set to be relatively far, even if the frequency is relatively large, the parasitic capacitance generated by the switch tube cannot be transmitted to other circuit modules or devices, so that the crosstalk of the circuit can be avoided.

[0110] It is mentioned above that the distance between the transmitting end and the receiving end of the micro-unit can be set to be relatively far, which will be described in detail below.

[0111] Optionally, in some embodiments, the distance between the first transmitting end and the first receiving end included in the first micro-unit is greater than a third threshold value; the distance between the second transmitting end and the second receiving end included in the second micro-unit is greater than a fourth threshold value; and the distance between the third transmitting end and the third receiving end included in the third micro-unit is greater than a fifth threshold value.

[0112] In this embodiment of the application, the distance between the first transmitting end and the first receiving end of the first microwave unit can be greater than the third threshold. For example, if the third threshold is 1 cm, the distance between the transmitting end and the receiving end of the microwave unit can be 1.5 cm or 2 cm, etc. This application does not make a specific limitation on this.

[0113] In this embodiment of the application, the distance between the second transmitting end and the second receiving end of the second microwave unit can be greater than the fourth threshold. For example, if the fourth threshold is 0.8 cm, the distance between the second transmitting end and the second receiving end of the second microwave unit can be 1 cm or 1.5 cm, etc. This application does not make specific limitations on this.

[0114] In this embodiment, the distance between the third transmitter and the third receiver of the third microwave unit can be greater than the fifth threshold. For example, if the fifth threshold is 0.8 cm, the distance between the second transmitter and the second receiver of the second microwave unit can be 1 cm or 1.3 cm, etc. This application does not make any specific limitation on this.

[0115] In this embodiment, the distance between the first transmitting end and the first receiving end of the first microwave unit 221 may be the same as or different from the distance between the second transmitting end and the second receiving end of the second microwave unit 222 and the third transmitting end and the third receiving end of the third microwave unit 232. This application does not make specific limitations on this.

[0116] Understandably, since microwave transmission does not rely on a medium, its transmission speed is relatively fast, which can reduce signal transmission time. For a microwave unit, its transmitting end can convert control signals into microwave signals and quickly transmit the microwave signals to the receiving end. After receiving the microwave signals, the receiving end can convert the microwave signals into control signals, enabling the switching transistors to respond quickly, that is, enabling the switching transistors to be turned on or off quickly.

[0117] like Figure 9 The diagram shown is a schematic structural diagram of a charger 900 provided in another embodiment of this application. The charger 900 may include a first control unit 911, a second control unit 912, a first microwave unit 921, at least one primary-side switch 931, at least one secondary-side switch 932, and a transformer 240.

[0118] At least one primary-side switch 931 is connected to the primary side of the transformer 940.

[0119] At least one secondary-side switch 932 is connected to the secondary side of the transformer 940.

[0120] At least one primary side switch tube 931 in the embodiment of the present application can be used to chop modulation on the voltage of the input transformer 940, for example, the voltage size of the direct current output of the secondary side of the transformer 940 can be changed by controlling the duty cycle of the primary side switch tube 931.

[0121] At least one secondary side switch tube 932 in the embodiment of the present application can be used to synchronize rectification on the voltage output by the transformer 940.

[0122] The first control unit 911 is configured to output a first control signal, the first control signal being used to control the turn-on or turn-off of the at least one primary side switch tube.

[0123] The second control unit 912 is configured to output a second control signal, the second control signal being used to control the turn-on or turn-off of the at least one secondary side switch tube.

[0124] The first control unit 911 in the embodiment of the present application can be used to output a first control signal. The first control signal can be a pulse signal with a period of 4us, or a pulse signal with a period of 0.02ns, which is not limited in the present application.

[0125] The second control unit 921 in the embodiment of the present application can be used to output a second control signal. The second control signal can be a pulse signal with a period of 2us, or a pulse signal with a period of 0.04ns, which is not limited in the present application.

[0126] The first micro unit 921 is connected with the first control unit and the second control unit respectively, and is configured to transmit a synchronization signal between the first control unit and the second control unit, the synchronization signal being used to synchronize the first control signal and the second control signal.

[0127] In the embodiment of the present application, the first micro unit 921 can transmit a synchronization signal between the first control unit and the second control unit, and the synchronization signal in the embodiment of the present application can be used to synchronize the first control signal and the second control signal.

[0128] The charger provided by the embodiments of the present application is fast in response speed, and the transmitting end can convert the first control signal into a first microwave signal and transmit the first microwave signal to the receiving end of the first microwave unit quickly, so that the driving speed is fast, the dead time can be accurately controlled, and the first switch tube can be turned on or turned off quickly even if the dead time of the first control signal is short, so that the crosstalk of the circuit is avoided. On the other hand, the transmission of the microwave does not rely on the medium transmission, so that the distance between the first transmitting end and the first receiving end of the first microwave unit can be set to be far, the transmission of the parasitic capacitance generated by the first switch tube can be isolated, and the crosstalk of the circuit is also avoided. Meanwhile, the first microwave unit is used for isolation communication, so that the fast bidirectional communication can be realized, the information such as driving information, state information and control information can be transmitted, the anti-interference performance is high, and the rapidity, flexibility and safety of the communication are improved.

[0129] Optionally, in some embodiments, the first microwave unit 921 is configured to send the synchronization signal output by the first control unit to the second control unit.

[0130] Optionally, in some embodiments, the first microwave unit 921 is configured to send the synchronization signal output by the second control unit to the first control unit.

[0131] In the embodiments of the present application, the first microwave unit 221 can send the synchronization signal output by the first control unit 911 to the second control unit 912, so that the second control unit 912 controls the on or off time of the at least one secondary side switch tube 932; the first microwave unit can also send the synchronization signal output by the second control unit 912 to the first control unit 911, so that the first control unit 911 controls the on or off time of the at least one primary side switch tube 931.

[0132] Optionally, in some embodiments, as shown in Figure 10a The charger 900 can include four primary side switch tubes and a first driving module 951.

[0133] The four primary side switch tubes 931 constitute a full-bridge rectifier circuit, which is configured to rectify and chopper-modulate the alternating current input to the charger.

[0134] The first driving module 951 is connected with the first control unit and the four primary side switch tubes respectively, and is configured to drive the on or off of the four primary side switch tubes according to the first control signal output by the first control unit.

[0135] The four primary side switch tubes in the embodiments of the present application can include MOS tube 931a, MOS tube 931b, MOS tube 931c and MOS tube 931d.

[0136] As shown in FIG. 9, the charger 900 can include two primary side switch tubes and a first drive module. Figure 10a When the first control unit 911 outputs a high level signal, if the pins of the N-channel MOS tube 931a and the N-channel MOS tube 931c are opened, the first control signal is transmitted to the first drive module 951, the first drive module 951 can amplify the received control signal and transmit the amplified signal to the N-channel MOS tube 931a and the N-channel MOS tube 931c. At this time, since the gate voltage of the N-channel MOS tube 931a is higher than the source voltage, and the gate voltage of the N-channel MOS tube 931c is higher than the source voltage, the N-channel MOS tube 931a and the N-channel MOS tube 931c can be turned on.

[0137] When the first control unit 911 outputs a high level signal, if the pins of the N-channel MOS tube 931a and the N-channel MOS tube 931c are opened, the first control signal is transmitted to the first drive module 951, the first drive module 951 can amplify the received control signal and transmit the amplified signal to the N-channel MOS tube 931a and the N-channel MOS tube 931c. At this time, since the gate voltage of the N-channel MOS tube 931a is higher than the source voltage, and the gate voltage of the N-channel MOS tube 931c is higher than the source voltage, the N-channel MOS tube 931a and the N-channel MOS tube 931c can be turned on.

[0138] Optionally, in some embodiments, as shown in FIG. 9, the charger 900 can include two secondary side switch tubes and a second drive module. Figure 10b

[0139] The two secondary side switch tubes are used for synchronous rectification of the voltage output by the transformer;

[0140] The second drive module is connected with the second control unit and the two secondary side switch tubes respectively, and is used for driving the two primary side switch tubes to be turned on or turned off according to the second control signal output by the second control unit.

[0141] In the embodiments of the present application, the two secondary side switch tubes can include two MOS tubes, which are MOS tube 932a and MOS tube 932b.

[0142] ​In this embodiment, the second control signal output by the second control unit 912 can be amplified by the second drive module 952, and the amplified signal can be transmitted to MOSFETs 932a and 932b. If the second control signal is a high-level signal, since the gate voltage of MOSFETs 932a and 932b is higher than the source voltage, MOSFETs 932a and 932b can be turned on.

[0143] Optionally, in some embodiments, the dead time of the first control signal and / or the second control signal is less than a first threshold.

[0144] Optionally, in some embodiments, the preset frequency of the first control signal and / or the second control signal is greater than a second threshold.

[0145] Optionally, in some embodiments, the first microwave unit includes an integrated circuit (IC) chip, in which an extremely high frequency (UHF) antenna is packaged.

[0146] The dead time, preset frequency, and microwave unit in this application are similar to those mentioned above, and will not be repeated here for the sake of brevity.

[0147] The device embodiments of this application have been described in detail above with reference to Figures 1-10. The following section will refer to... Figures 11-12 This document describes the method embodiments of this application. The method embodiments correspond to the device embodiments, so any parts not described in detail can be referred to the preceding device embodiments.

[0148] like Figure 11 As shown, a control method 1100 is provided in an embodiment of this application. The method is applied to a charger, which includes a transformer, at least one primary-side switch, a first control unit, a second control unit, and a first microwave unit. The method 1100 may include steps 1110-1130.

[0149] 1110, the second control unit generates feedback information based on the voltage and / or current information output from the charger output terminal.

[0150] 1120, the first microwave unit transmits the feedback information to the first control unit.

[0151] 1130, the first control unit outputs a first control signal according to the feedback information to control the on or off of the at least one primary-side switching transistor.

[0152] Optionally, in some embodiments, the charger further comprises at least one secondary side switch tube, and the method further comprises: the at least one secondary side switch tube synchronously rectifying the voltage output by the transformer; and the first control unit outputting a second control signal to control the turn-on or turn-off of the at least one secondary side switch tube.

[0153] Optionally, in some embodiments, the method 1100 further comprises: the first control unit outputting the second control signal to control the turn-on or turn-off of the at least one secondary side switch tube according to the voltage / current information.

[0154] Optionally, in some embodiments, the charger further comprises at least one secondary side switch tube and a synchronous rectification driving module, and the method 1100 further comprises: the at least one secondary side switch tube synchronously rectifying the voltage output by the transformer; and the synchronous rectification driving module controlling the turn-on or turn-off of the at least one secondary side switch tube.

[0155] Optionally, in some embodiments, the charger further comprises a second micro unit and a first driving module, and the method 1100 further comprises: the second micro unit transmitting the first control signal output by the first control unit to the first driving module to enable the first driving module to drive the turn-on or turn-off of the at least one primary side switch tube.

[0156] Optionally, in some embodiments, the charger further comprises a third micro unit and a second driving module, and the method 1100 further comprises: the third micro unit transmitting the second control signal output by the first control unit to the second driving module to enable the second driving module to drive the turn-on or turn-off of the at least one secondary side switch tube.

[0157] Optionally, in some embodiments, the dead time of the first control signal and / or the second control signal is less than a first threshold value.

[0158] Optionally, in some embodiments, the preset frequency of the first control signal and / or the second control signal is greater than a second threshold value.

[0159] Optionally, in some embodiments, the first micro unit and / or the second micro unit and / or the third micro unit comprises an IC chip, and an extremely high frequency antenna is packaged in the IC chip.

[0160] Figure 12A control method 1200 is provided for another embodiment of the present application, the method 1200 is applied to a charger, the charger includes a transformer, at least one primary side switch tube, at least one secondary side switch tube, a first control unit, a second control unit and a first micro unit, the method 1200 can include steps 1210-1230.

[0161] 1210, the first control unit outputs a first control signal, the first control signal is used to control the conduction or turn-off of the at least one primary side switch tube.

[0162] 1220, the second control unit outputs a second control signal, the second control signal is used to control the conduction or turn-off of the at least one secondary side switch tube.

[0163] 1230, the first micro unit transmits a synchronization signal between the first control unit and the second control unit, the synchronization signal is used to synchronize the first control signal and the second control signal.

[0164] Optionally, in some embodiments, the first micro unit transmits a synchronization signal between the first control unit and the second control unit, including: the first micro unit sends the synchronization signal output by the first control unit to the second control unit.

[0165] Optionally, in some embodiments, the first micro unit transmits a synchronization signal between the first control unit and the second control unit, including: the first micro unit sends the synchronization signal output by the second control unit to the first control unit.

[0166] Optionally, in some embodiments, the charger further includes four primary side switch tubes and a first driving module; the four primary side switch tubes rectify and chopper modulate alternating current input to the charger; the first driving module drives the conduction or turn-off of the four primary side switch tubes according to the first control signal output by the first control unit.

[0167] Optionally, in some embodiments, the charger further includes two primary side switch tubes and a second driving module; the two secondary side switch tubes synchronously rectify the voltage output by the transformer; the second driving module drives the conduction or turn-off of the two primary side switch tubes according to the second control signal output by the second control unit.

[0168] Optionally, in some embodiments, the dead time of the first control signal and / or the second control signal is less than a first threshold.

[0169] Optionally, in some embodiments, the preset frequency of the first control signal and / or the second control signal is greater than a second threshold.

[0170] Optionally, in some embodiments, the first micro-unit includes an IC chip in which an extremely high frequency antenna is packaged.

[0171] The embodiments of the present application further provide a computer readable storage medium, which stores computer executable instructions, and the computer executable instructions are configured to execute any one of the control methods 1100 or 1200.

[0172] The embodiments of the present application further provide a computer program product, which includes a computer program stored in a computer readable storage medium, and the computer program includes program instructions, and when the program instructions are executed by a computer, the computer is caused to execute any one of the control methods 1100 or 1200.

[0173] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available medium can be a magnetic medium (for example, floppy disk, hard disk, magnetic tape), an optical medium (for example, digital video disc (DVD)) or a semiconductor medium (for example, solid state disk (SSD)) and the like.

[0174] Those skilled in the art can appreciate that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0175] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are only schematic. The division of the units is only a logical function division. In actual implementation, there can be another division manner. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or in other forms.

[0176] When used in the present application, although the terms "first", "second" and the like can be used to describe various devices, these devices should not be limited by these terms. These terms are only used to distinguish one device from another. For example, the first device can be called the second device, and similarly, the second device can be called the first device, without changing the meaning of the description, as long as all occurrences of "first device" are consistently renamed and all occurrences of "second device" are consistently renamed. The first device and the second device are both devices, but can not be the same device.

[0177] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. they can be located in one place or distributed on multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiment according to actual needs.

[0178] In addition, the functional units in each embodiment of the present application can be integrated into one processing unit, or each unit can exist physically, or two or more units can be integrated into one unit.

[0179] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A charger, characterized in that, include: transformer; At least one primary-side switch is used to chop-modulate the voltage input to the transformer; First control unit; The second control unit is used to generate feedback information based on the voltage and / or current information output from the charger output terminal; The first microwave unit is connected to both the first control unit and the second control unit, and is used to transmit the feedback information to the first control unit. The first control unit is configured to output a first control signal based on the feedback information to control the on or off of the at least one primary-side switching transistor. At least one secondary-side switching transistor is used to synchronously rectify the voltage output by the transformer; The first control unit is further configured to output a second control signal to control the on or off state of the at least one secondary-side switch. The second microwave unit is connected to the first control unit; The first driving module is connected to the second microwave unit and the at least one primary-side switching transistor, respectively. The second microwave unit is used to transmit the first control signal output by the first control unit to the first drive module, so that the first drive module drives the at least one primary-side switch to turn on or off. The third microwave unit is connected to the first control unit; The second driving module is connected to the third microwave unit and the at least one secondary-side switching transistor, respectively; The third microwave unit is used to transmit the second control signal output by the first control unit to the second drive module, so that the second drive module drives the at least one secondary-side switch to turn on or off. The first control unit includes: a first control subunit connected to the second microwave unit, configured to output the first control signal to the second microwave unit and to control the output time of the first control signal; and a second sub-control unit connected to the third microwave unit, configured to output the second control signal to the third microwave unit and to control the output time of the second control signal. Wherein, the distance between the first transmitter and the first receiver of the first microwave unit is greater than a third threshold; the distance between the second transmitter and the second receiver of the second microwave unit is greater than a fourth threshold; and the distance between the third transmitter and the third receiver of the third microwave unit is greater than a fifth threshold.

2. The charger according to claim 1, characterized in that, The first control unit is further configured to output the second control signal based on the feedback information, so as to control the on or off of the at least one secondary-side switch.

3. The charger according to claim 1 or 2, characterized in that, The charger also includes: A synchronous rectification drive module is used to control the on or off of the at least one secondary-side switching transistor.

4. The charger according to claim 1 or 2, characterized in that, The dead time of the first control signal and / or the second control signal is less than the first threshold.

5. The charger according to claim 1 or 2, characterized in that, The preset frequency of the first control signal and / or the second control signal is greater than the second threshold.

6. The charger according to claim 1 or 2, characterized in that, The first microwave unit and / or the second microwave unit and / or the third microwave unit include an integrated circuit (IC) chip, in which an extremely high frequency (UHF) antenna is packaged.

7. A control method, characterized in that, The method is applied to a charger, which includes a transformer, at least one first primary-side switch, a first control unit, a second control unit, a first microwave unit, at least one secondary-side switch, a third microwave unit, and a second drive module. The third microwave unit is connected to the first control unit; the second drive module is connected to both the third microwave unit and the at least one secondary-side switch. The second microwave unit is connected to the first control unit; A first driving module is connected to the second microwave unit and the at least one primary-side switching transistor, respectively; the method includes: The second control unit generates feedback information based on the voltage and / or current information output from the charger's output terminal; The first microwave unit transmits the feedback information to the first control unit; The first control unit outputs a first control signal based on the feedback information to control the on or off of the at least one primary-side switching transistor; The at least one secondary-side switch performs synchronous rectification of the voltage output by the transformer; The first control unit is used to output a second control signal to control the on or off of the at least one secondary-side switching transistor; The third microwave unit transmits the second control signal output by the first control unit to the second drive module, so that the second drive module drives the at least one secondary-side switch to turn on or off. The second microwave unit is used to transmit the first control signal output by the first control unit to the first drive module, so that the first drive module drives the at least one primary-side switch to turn on or off. The first control unit includes: a first control subunit connected to the second microwave unit, configured to output the first control signal to the second microwave unit and to control the output time of the first control signal; and a second sub-control unit connected to the third microwave unit, configured to output the second control signal to the third microwave unit and to control the output time of the second control signal. Wherein, the distance between the first transmitter and the first receiver of the first microwave unit is greater than a third threshold; the distance between the second transmitter and the second receiver of the second microwave unit is greater than a fourth threshold; and the distance between the third transmitter and the third receiver of the third microwave unit is greater than a fifth threshold.

8. The method according to claim 7, characterized in that, The charger further includes at least one secondary-side switching transistor, and the method further includes: The first control unit outputs a second control signal to control the on or off of the at least one secondary-side switch.

9. The method according to claim 7 or 8, characterized in that, The method further includes: The first control unit outputs the second control signal based on the voltage and / or current information to control the on or off of the at least one secondary-side switch.

10. The method according to claim 7 or 8, characterized in that, The charger further includes at least one secondary-side switching transistor and a synchronous rectification drive module, and the method further includes: The at least one secondary-side switch performs synchronous rectification of the voltage output by the transformer; The synchronous rectification drive module controls the on or off of at least one secondary-side switching transistor.

11. The method according to claim 7 or 8, characterized in that, The dead time of the first control signal and / or the second control signal is less than the first threshold.

12. The method according to claim 7 or 8, characterized in that, The preset frequency of the first control signal and / or the second control signal is greater than the second threshold.

13. The method according to claim 7 or 8, characterized in that, The first microwave unit and / or the second microwave unit and / or the third microwave unit include an integrated circuit (IC) chip, in which an extremely high frequency (UHF) antenna is packaged.

14. A computer-readable storage medium storing computer-executable instructions configured to perform the method of any one of claims 7 to 13.

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