CN110912239A - A multi-port charging device - Google Patents
A multi-port charging device Download PDFInfo
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- CN110912239A CN110912239A CN201911384709.5A CN201911384709A CN110912239A CN 110912239 A CN110912239 A CN 110912239A CN 201911384709 A CN201911384709 A CN 201911384709A CN 110912239 A CN110912239 A CN 110912239A
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Abstract
The embodiment of the invention discloses a multi-port charging device. The method comprises the following steps: the device comprises a plurality of charging interfaces, a detection module, a control module, a switch module and a voltage regulation and control module; the detection module comprises a plurality of detection units, and the switch module comprises a plurality of switch units; the charging interfaces, the switch units and the detection units are in one-to-one correspondence; the control module is used for receiving the connection state of the charging interface and the external equipment fed back by each detection unit and sending a switch control signal to the switch unit according to the connection state of the charging interface and the external equipment; the control module is used for adjusting the voltage output by the voltage output end of the voltage regulation and control module to the power supply end of the charging interface according to the connection state of the charging interface and the external equipment fed back by each detection unit. The technical scheme provided by the embodiment of the invention can accurately control the on and off of each charging interface and intelligently distribute power.
Description
Technical Field
The embodiment of the invention relates to the technical field of charging, in particular to a multi-port charging device.
Background
With the development of electronic devices, there is an increasing demand for multi-port charging devices in the market, and therefore, multi-port charging devices become a hot spot for research.
At present, a plurality of charging interfaces in most multi-interface charging devices respectively have fixed output power, for example, a multi-interface charging device includes two charging interfaces, one of which has a smaller output power value and the other has a larger output power value, when two output ports are respectively connected to devices of different power levels, when the charging interface with the smaller output power value is connected to the charging device with the larger power, the charging device cannot obtain enough charging power, and when the charging interface with the larger output power value is connected to the charging device with the smaller power, the charging device will waste the charging power. That is to say, the problem that power distribution cannot be performed generally exists in the existing multi-port charging device, and user experience is affected.
Disclosure of Invention
The invention provides a multi-port charging device, which is used for accurately controlling the on and off of each charging interface and intelligently distributing power.
In a first aspect, an embodiment of the present invention provides a multi-port charging device, including: the device comprises a plurality of charging interfaces, a detection module, a control module, a switch module and a voltage regulation and control module; the detection module comprises a plurality of detection units, and the switch module comprises a plurality of switch units; the charging interfaces, the switch units and the detection units are in one-to-one correspondence;
the voltage output end of the detection unit is electrically connected with the voltage end of the charging interface, the grounding end of the charging interface is electrically connected with the first end of the switch unit and the first input end of the detection unit respectively, the second input end of the detection unit is electrically connected with the second end of the switch unit, the switch control input end of the switch unit is electrically connected with the switch control output end of the control module, and the state output end of the detection unit is electrically connected with the state input end of the control module; the detection unit is used for detecting the connection state of the charging interface and the external equipment; the control module is used for receiving the connection state of the charging interface and the external equipment fed back by each detection unit and sending a switch control signal to the switch unit according to the connection state of the charging interface and the external equipment;
the voltage output end of the voltage regulation and control module is electrically connected with the power supply end of the charging interface, the interface communication end of the voltage regulation and control module is electrically connected with the communication end of the charging interface, the control communication end of the voltage regulation and control module is electrically connected with the communication end of the control module, and the second end of the switch unit and the grounding end of the voltage regulation and control module are electrically connected with the ground end of the multi-port charging equipment; the control module is used for adjusting the power output from the voltage output end of the voltage regulation and control module to the charging interface according to the connection state of the charging interface and the external equipment fed back by each detection unit.
Optionally, the detection unit comprises: the circuit comprises a first resistor, a second resistor, a first filter circuit, a second filter circuit and a detection chip;
the first end of the first resistor is electrically connected with a first power supply end of the multi-port charging equipment, the second end of the first resistor is electrically connected with a power supply end of a charging interface, a grounding end of the charging interface is electrically connected with the first end of the second resistor, and the second end of the second resistor is grounded;
the first end of the first filtering circuit is electrically connected with the first end of the second resistor and the first end of the switch unit respectively, and the second end of the first filtering circuit is electrically connected with the first input end of the detection chip; the first end of the second filter circuit is electrically connected with the second end of the switch unit and the ground end of the multi-port charging device respectively, and the second end of the second filter circuit is electrically connected with the second input end of the detection chip;
the first filtering circuit and the second filtering circuit are used for filtering; the detection chip is used for generating a state signal for representing the connection state of the charging interface and the external equipment according to signals input by the first input end of the detection chip and the second input end of the detection chip, and the state signal comprises a first level signal, a second level signal and a clock signal.
Optionally, the detection chip includes a first comparator, a second comparator, an and gate, an nand gate, and a clock generator;
the positive phase input end of the first comparator and the positive phase input end of the second comparator are electrically connected with the second end of the first filter circuit, the negative phase input end of the first comparator is electrically connected with the second end of the second filter circuit, and the output end of the first comparator is electrically connected with the first input end of the AND gate;
the inverting input end of the second comparator is electrically connected with the reference voltage end of the multi-port charging equipment, the output end of the second comparator is electrically connected with the first input end of the NAND gate, the output end of the clock generator is electrically connected with the second input end of the NAND gate, and the output end of the NAND gate is electrically connected with the second input end of the AND gate;
the output end of the AND gate is electrically connected with the control module.
Optionally, the detection chip further includes a debouncer, a first end of the debouncer is electrically connected to the output end of the first comparator, and a second end of the debouncer is electrically connected to the first input end of the and gate.
Optionally, the detection chip further includes a first switch, and the detection unit further includes a third resistor;
the control end of the first switch is electrically connected with the output end of the AND gate, the first end of the first switch is electrically connected with the second end of the third resistor, the first end of the third resistor is electrically connected with the first power supply end of the multi-port charging device, and the second end of the first switch is grounded.
Optionally, the detection unit further includes a first diode, an anode of the first diode is electrically connected to the second end of the first resistor, and a cathode of the first diode is electrically connected to a power supply terminal of the charging interface.
Optionally, the first filter line comprises a fourth resistor and a first capacitor; the second filter circuit comprises a fifth resistor, a first capacitor and a second capacitor;
the first end of the fourth resistor is electrically connected with the first end of the switch unit, the second end of the fourth resistor is electrically connected with the first end of the first capacitor, and the second end of the first capacitor is grounded;
the first end of the fifth resistor is electrically connected with the second end of the switch unit, the second end of the fifth resistor is electrically connected with the first end of the second capacitor, and the second end of the second capacitor is grounded.
Optionally, the switching unit comprises a metal-oxide semiconductor field effect transistor.
Optionally, the charging interface comprises a TYPE-a interface.
Optionally, the control module comprises a microcontroller.
According to the multi-interface charging device provided by the embodiment of the invention, the detection module is used for detecting the connection state of each charging interface and the external device, so that the control module can turn off the charging interface which is not connected with the external device according to the connection state of each charging interface and the external device, and adjust the power output from the voltage output end of the voltage regulation and control module to the charging interface according to the power grade of the external device connected with each charging interface, so that each external device can be charged with charging power as large as possible under the safe condition, the charging efficiency is improved, the problem that power distribution cannot be carried out in the prior art is solved, and the effects of accurately controlling the on and off of each charging interface and intelligently carrying out power distribution are realized.
Drawings
Fig. 1 is a schematic structural diagram of a multi-port charging device according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a multi-port charging device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a multi-port charging device according to an embodiment of the present invention. Referring to fig. 1, the multi-port charging apparatus includes: the charging system comprises a plurality of charging interfaces 50, a detection module, a control module 30, a switch module and a voltage regulation and control module 40; the detection module includes a plurality of detection units 110, and the switching module includes a plurality of switching units 210; the plurality of charging interfaces 50, the plurality of switch units 210, and the plurality of detection units 110 correspond one to one. The voltage output terminal VOUT of the detecting unit 110 is electrically connected to the voltage terminal VBUS of the charging interface 50, the ground terminal Gnd of the charging interface 50 is electrically connected to the first terminal D of the switching unit 210 and the first input terminal IN + of the detecting unit 110, respectively, the second input terminal IN-of the detecting unit 110 is electrically connected to the second terminal S of the switching unit 210, the switch control input terminal G of the switching unit 210 is electrically connected to the switch control output terminal C of the control module 30 (the control module 30 exemplarily shown IN fig. 1 includes the first switch control output terminal C1 and the second switch control terminal C2), and the status output terminal FLAG of the detecting unit 110 is electrically connected to the status input terminal F of the control module 30 (the control module 30 exemplarily shown IN fig. 1 includes the first status input terminal F1 and the second status input terminal F2); the detection unit 110 is configured to detect a connection state of the charging interface 50 with an external device; the control module 30 is configured to receive the connection state of the charging interface 50 and the external device fed back by each detection unit 110, and send a switch control signal to the switch unit 210 according to the connection state of the charging interface 50 and the external device; a voltage output terminal vout of the voltage regulation and control module 40 (fig. 1 exemplarily shows that the voltage regulation and control module 40 includes a first voltage output terminal vout1 and a second voltage output terminal vout2) is electrically connected to the power terminal VBUS of the charging interface 50, an interface communication terminal d of the voltage regulation and control module 40 (fig. 1 exemplarily shows that the voltage regulation and control module 40 includes a first interface communication terminal d1 and a second interface communication terminal d2) is electrically connected to a communication terminal d' of the charging interface 50, a control communication terminal T of the voltage regulation and control module 40 is electrically connected to a communication terminal T of the control module 30, and both the second terminal S of the switch unit 210 and the ground terminal GND of the voltage regulation and control module 40 are electrically connected to the ground terminal GND of the multi-port charging device; the control module 30 is configured to adjust the power output from the voltage output end of the voltage regulating and controlling module 40 to the charging interface 50 according to the connection state between the charging interface 50 and the external device fed back by each detection unit 110.
Specifically, the multi-port charging device may be a charging adapter or a mobile power supply, which is not limited in this application. The external device can be an electronic device such as a mobile phone, a computer and an intelligent wearable device, and the application does not limit the electronic device.
Specifically, the detecting unit 110 is configured to detect a connection state of the charging interface 50 corresponding to the detecting unit and the external device, where the connection state may include that the external device is not accessed, that the external device is accessed instantaneously, and that the external device is being charged.
Specifically, the control module 30 is configured to turn off the charging interface 50 that is not connected to the external device through the switch unit 210 according to the connection state with the external device fed back by each detection unit 110, and turn on the charging interface 50 that is connected to the external device (the charging interface 50 that is just connected to the external device and the charging interface 50 that is charging the external device) through the switch unit 210 so that the voltage regulation and control module 40 can charge the external device through the charging interface 50.
Specifically, the voltage regulation and control module 40 is configured to communicate with external devices connected to each charging interface 50, so as to obtain the rated charging power of each external device connected to each charging interface 50. The voltage regulation and control module 40 is further configured to communicate with the control module 30, the voltage regulation and control module 40 may send the rated charging power of each external device to the control module 30, and after the control module 30 learns the rated charging power of each external device and the on-off state of each charging interface 50, the control module 30 may obtain an optimal charging power value according to a built-in regulation and control strategy and send the optimal charging power value to the voltage regulation and control module 40, so that the power output by the voltage regulation and control module 40 to each charging interface 50 connected to the external device is the optimal charging power value. The specific regulation strategy can be set by a person skilled in the art according to actual conditions, and is not limited herein, and for example, the regulation strategy can be: among the external devices connected to each charging interface 50, the external device having the smallest rated charging power has its rated charging power set as the optimal charging power value.
Specifically, the working process of the multi-port charging device shown in fig. 1 is as follows: each detection unit 110 detects the connection state of the corresponding charging interface 50 and the external device; the control module 30 disconnects the charging interface 50 that is not accessed to the external device through each switch unit 210 according to the connection state between the charging interface 50 and the external device fed back by each detection unit 110, and connects the charging interface 50 that has just been accessed to the external device and the charging interface 50 that is charging the external device; the voltage regulation and control module 40 acquires the rated charging power of the external device accessed to each charging port 50 accessed with the external device and sends the rated charging power to the control module 30; the control module 30 obtains an optimal charging power value according to a regulation strategy; the voltage regulation and control module 40 outputs power to each charging interface 50 connected to the external device according to the optimal charging power value.
For example, to clearly illustrate that the multi-port charging device in the present application can precisely control the on and off of each charging interface 50 and intelligently perform power regulation, the following description will be given by taking specific application scenarios as an example. For example, the multi-interface charging device in fig. 1 includes two charging interfaces 50, one charging interface 50 is connected to a tablet computer, and the rated charging power of the tablet computer is 20W, and the other charging interface 50 is connected to a mobile phone, and the rated charging power of the mobile phone is 10W, so that the optimal charging power value is 10W, and the power output by the voltage regulation and control module 40 to the two charging interfaces 50 is 10W; when the mobile phone is removed and the tablet computer is still charged, the control module 30 disconnects the charging interface 50 originally connected with the mobile phone through the switch unit 110, meanwhile, the charging interface 50 connected with the tablet computer is kept connected, and the control module 30 controls the voltage regulation and control module 40 to increase the output power of the charging interface connected with the tablet computer to 20W, so that the charging efficiency of the tablet computer is improved.
It should be noted that, for convenience of drawing, fig. 1 only exemplarily shows that two charging interfaces 50 are included in the multi-interface charging device, but the application is not limited thereto, and the number of charging interfaces 50 in the multi-interface charging device may be set by a person skilled in the art according to practical situations.
According to the multi-interface charging device provided by the embodiment of the invention, the connection state of each charging interface 50 and the external device is detected by the detection module, so that the control module 30 can turn off the charging interface 50 which is not connected with the external device according to the connection state of each charging interface 50 and the external device, and adjust the power output from the voltage output end of the voltage regulation and control module 40 to the charging interface 50 according to the power grade of the external device connected with each charging interface 50, so that each external device can be charged with charging power as large as possible under the safe condition, the charging efficiency is improved, the problem that power distribution cannot be carried out in the prior art is solved, and the effects of accurately controlling the on and off of each charging interface 50 and intelligently carrying out power distribution are realized.
Specifically, there are various specific implementations of the modules in the multi-port charging device, and the following description will be given with reference to the typical example, but not limiting the present application.
Fig. 2 is a circuit diagram of a multi-port charging device according to an embodiment of the present invention. Referring to fig. 1 and 2, optionally, the detection unit 110 includes: the detection circuit comprises a first resistor R1, a second resistor R2, a first filter circuit, a second filter circuit and a detection chip 111; a first terminal of the first resistor R1 is electrically connected to the first power terminal of the multi-port charging device, a second terminal of the first resistor R1 (i.e., the voltage output terminal VOUT of the detecting unit 110) is electrically connected to the power terminal VBUS of the charging interface 50, a ground terminal Gnd of the charging interface 50 is electrically connected to a first terminal of the second resistor R2 (i.e., the first input terminal IN +) of the detecting unit 110, and a second terminal of the second resistor R2 is grounded; a first end of the first filter line is electrically connected to a first end of the second resistor R2 and a first end D of the switch unit 210, respectively, and a second end of the first filter line is electrically connected to a first input end of the detection chip 111; a first end of the second filtering circuit (i.e., the second input end IN-) of the detection unit 110 is electrically connected to the second end S of the switch unit 210 and the ground GND of the multi-port charging device, respectively, and a second end of the second filtering circuit is electrically connected to the second input end of the detection chip 111; the first filtering circuit and the second filtering circuit are used for filtering; the detection chip 111 is configured to generate a status signal for characterizing a connection status of the charging interface 50 and an external device according to signals input by the first input terminal of the detection chip 111 and the second input terminal of the detection chip 111, where the status signal includes a first level signal, a second level signal, and a clock signal.
Specifically, the resistance of the second resistor R2 is much greater than the resistance of the first resistor R1, for example, the resistance of the second resistor R2 is 2M, and the resistance of the first resistor R1 is 1K, so that when the external device is just connected to the charging interface 50, the voltage that the first input terminal IN + of the detection chip 111 can receive is approximately equal to the voltage provided by the first VCC of the multi-port charging device, i.e., receives a high level. Specifically, the conduction voltage drop of the switching unit 210 is much smaller than the voltage provided by the first power terminal VCC of the multi-port charging device, for example, the voltage provided by the first power terminal VCC of the multi-port charging device is 3.3V, and the conduction voltage drop of the switching unit 210 is 0.3V.
Specifically, when no external device is connected to the charging interface 50, the switch unit 110 is in an off state, the first input end of the detection chip 111 inputs a low level, and the second input end of the detection chip 111 inputs a low level; when the external device is just connected to the charging interface 50, the switch unit 110 is still in the off state, the first input end of the detection chip 111 inputs a high level, and the second input end of the detection chip 111 inputs a low level; when the charging interface 50 is charging an external device, the switch unit 110 is in a conducting state, the voltage value input by the first input terminal of the detection chip 111 is the conducting voltage drop value of the switch unit 110, and the second input terminal of the detection chip 111 inputs a low level. It can be seen that, when the connection states of the charging interface 50 and the external device are not connected to the external device, the external device is connected to the external device instantly, or the external device is being charged, the signals received by the detection chip 111 are different, so that the detection chip 111 can generate the state signal for representing the connection state of the charging interface 50 and the external device according to the signals input by the first input terminal of the detection chip 111 and the second input terminal of the detection chip 111.
Specifically, the status signals include three types, which are respectively a first level signal, a second level signal and a clock signal. The three status signals correspond to the connection statuses of the three charging interfaces 50 and the external device one by one, and the specific corresponding situation can be set by those skilled in the art according to the actual situation, which is not limited herein. Illustratively, the first level signal corresponds to a non-access to the external device, the clock signal corresponds to an instant of access to the external device, and the second level signal corresponds to a charging of the external device.
With continued reference to fig. 1 and 2, optionally, the detection chip includes a first comparator CMP1, a second comparator CMP2, an and gate a, a nand gate NA, and a clock generator CLK; the positive phase input terminal of the first comparator CMP1 and the positive phase input terminal of the second comparator CMP2 are electrically connected to the second terminal of the first filter line, the negative phase input terminal of the first comparator CMP1 is electrically connected to the second terminal of the second filter line, and the output terminal of the first comparator CMP1 is electrically connected to the first input terminal of the and gate a; the inverting input end of the second comparator CMP2 is electrically connected with the reference voltage end of the multi-port charging equipment, the output end of the second comparator CMP2 is electrically connected with the first input end of the NAND gate NA, the output end of the clock generator CLK is electrically connected with the second input end of the NAND gate NA, and the output end of the NAND gate NA is electrically connected with the second input end of the AND gate A; the output terminal of the and gate a (i.e., the state signal terminal FLAG of the detection unit 110) is electrically connected to the control module 30.
Specifically, when the external device is just connected to the charging interface 50, the voltage input by the first input terminal IN + of the detection chip 111 is greater than the voltage of the reference voltage terminal REF of the multi-port charging device. Illustratively, when the external device is just connected to the charging interface 50, the voltage that the first input terminal IN + of the detection chip 111 can receive is approximately equal to 3.3V, and the voltage of the reference voltage terminal REF of the multi-port charging device is 1V. Specifically, the clock generator CLK is used to generate a clock signal.
Specifically, the working principle of the detection chip 111 is as follows: when no external device is connected to the charging interface 50, the switch unit 110 is in an off state, the first input terminal of the detection chip 111 inputs a low level, the second input terminal of the detection chip 111 inputs a low level, the first comparator CMP1 outputs a low level, the second comparator CMP2 outputs a low level, the nand gate NA outputs a high level, and the and gate a outputs a low level. When the external device is just connected to the charging interface 50, the switch unit 110 is still in an off state, the first input end of the detection chip 111 inputs a high level, the second input end of the detection chip 111 inputs a low level, the first comparator CMP1 outputs a high level, the second comparator CMP2 outputs a high level, the nand gate NA outputs a clock, and the and gate a outputs a clock signal. When the charging interface 50 is charging an external device, the switch unit 110 is in a conducting state, the voltage value input by the first input terminal of the detection chip 111 is the conducting voltage drop value of the switch unit 110, the second input terminal of the detection chip 111 inputs a low level, the first comparator CMP1 outputs a high level, the second comparator CMP2 outputs a low level, the nand gate NA outputs a high level, and the and gate a outputs a high level.
With continued reference to fig. 1 and 2, optionally, the detection chip further includes an debouncer DEB having a first terminal electrically connected to the output of the first comparator CMP1 and a second terminal electrically connected to a first input of the and gate a. The advantage of this arrangement is that it can prevent and gate a from regarding the jitter signal at its first input terminal as a valid signal, and further avoid the detection chip from falsely detecting the connection state of the corresponding charging interface 50 and the external device.
With continued reference to fig. 1 and 2, optionally, the detection chip further includes a first switch Q1, and the detection unit 110 further includes a third resistor R3; the control terminal of the first switch Q1 is electrically connected to the output terminal of the and gate a, the first terminal of the first switch Q1 (i.e., the status signal terminal FLAG of the detecting unit 110) is electrically connected to the second terminal of the third resistor R3, the first terminal of the third resistor R3 is electrically connected to the first power terminal VCC of the multi-port charging device, and the second terminal of the first switch Q1 is grounded.
Optionally, the first switch Q1 includes a Metal oxide semiconductor Field Effect Transistor (MOS for short), the first switch Q1 may be a P-type MOS or an N-type MOS, and those skilled in the art may set the switch according to actual situations, which is not limited in this application. For example, when the first switch Q1 is an N-type MOS, when the control terminal of the first switch Q1 inputs a low level, the first switch Q1 is in an off state, and the first terminal of the first switch Q1 (i.e., the state output terminal FLAG of the detection unit 110) outputs a high level; when the clock is input to the control terminal of the first switch Q1, the first switch Q1 is in a continuous on and off state, and the first terminal of the first switch Q1 outputs the clock; when the control terminal of the first switch Q1 inputs a high level, the first switch Q1 is in a conducting state, and the first terminal of the first switch Q1 outputs a low level.
It is understood that, when the first terminal of the first switch Q1 outputs a high level, the specific value of the high level is related to the voltage of the first power terminal VCC of the multi-port charging device and the third resistor R3, and the specific value of the high level output by the first terminal of the first switch Q1 can be flexibly adjusted by adjusting the voltage of the first power terminal VCC and the third resistor R3, so that the high level can meet the subsequent requirements of use.
With continued reference to fig. 1 and 2, optionally, the detecting unit 110 further includes a first diode D1, an anode of the first diode D1 is electrically connected to the second terminal of the first resistor R1, and a cathode of the first diode D1 is electrically connected to the power source terminal VBUS of the charging interface 50. This arrangement is advantageous in preventing the voltage regulation module 40 from supplying power to the charging interface 50 when the current flows back to the first power terminal VCC of the multi-port charging device.
With continued reference to fig. 1 and 2, optionally, the first filter circuit includes a fourth resistor R4 and a first capacitor C1; the second filter circuit comprises a fifth resistor R5 and a second capacitor C2; a first end of the fourth resistor R4 is electrically connected to the first end of the switch unit 210, a second end of the fourth resistor R4 is electrically connected to the first end of the first capacitor C1, and a second end of the first capacitor C1 is grounded; a first terminal of the fifth resistor R5 is electrically connected to the second terminal of the switch unit 210, a second terminal of the fifth resistor R5 is electrically connected to the first terminal of the second capacitor C2, and a second terminal of the second capacitor C2 is grounded. It can be understood that the RC filter circuit is simple in circuit and strong in anti-interference performance, and is beneficial to reducing the cost.
With continued reference to fig. 1 and 2, optionally, the switching unit 210 includes a metal-oxide semiconductor field effect transistor. Specifically, the MOS in the switching unit 210 may be a P-type MOS or an N-type MOS, and those skilled in the art may set the MOS according to actual situations, which is not limited in this application.
Specifically, the first comparator CMP1 may be a comparator with high detection accuracy, and may be, for example, a comparator with detection accuracy of 50 μ V or less. It can be understood that the source and drain impedance of the MOS is usually 0.001 Ω, and since 50 μ V/0.001 Ω, when the current of the external device is greater than 5mA during charging, the detection unit 110 can detect that the external device is connected to the charging interface 50, that is, the detection unit 110 can accurately detect the connection state between the charging interface 50 and the external device.
With continued reference to fig. 1 and 2, optionally, the charging interface 50 includes a TYPE-a interface. It will be appreciated that the TYPE-a interface itself is typically not provided with circuitry to detect whether an external device is connected thereto, and thus the charging interface in this application may comprise a TYPE-a interface.
With continued reference to fig. 1 and 2, optionally, the control module 30 may include a Microcontroller (MCU). It can be understood that the MCU has the advantages of low cost, small size, low power consumption, etc., which is beneficial to reduce the cost and size of the multi-port charging device.
It should be noted that, since each detection unit 110 in the detection module is the same, for convenience of drawing, the reference numerals of the corresponding circuit elements in the two detection units 110 in fig. 2 are the same and are not distinguished. It should be noted that, for simplicity, the ground terminal GND of the multi-port charging device is referred to as "ground" in the above.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
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| CN112117810A (en) * | 2020-09-28 | 2020-12-22 | 无锡睿勤科技有限公司 | Charging circuit and charging method suitable for hybrid charger |
| CN114465318A (en) * | 2022-02-18 | 2022-05-10 | 坎德拉（深圳）科技创新有限公司 | Charging control device and charging pile |
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| CN107171407A (en) * | 2017-07-13 | 2017-09-15 | 广东小天才科技有限公司 | Charging base |
| CN109905042A (en) * | 2019-03-20 | 2019-06-18 | 深圳市创芯微微电子有限公司 | A power supply device and its power supply circuit |
| CN211018347U (en) * | 2019-12-28 | 2020-07-14 | 江苏紫米电子技术有限公司 | Multi-port charging equipment |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117810A (en) * | 2020-09-28 | 2020-12-22 | 无锡睿勤科技有限公司 | Charging circuit and charging method suitable for hybrid charger |
| CN112117810B (en) * | 2020-09-28 | 2022-05-10 | 无锡睿勤科技有限公司 | Charging circuit and charging method suitable for hybrid charger |
| CN114465318A (en) * | 2022-02-18 | 2022-05-10 | 坎德拉（深圳）科技创新有限公司 | Charging control device and charging pile |
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