Multi-port charging circuit and charging equipment

Abstract

The embodiment of the utility model provides a multi-port charging circuit and charging equipment, and relates to the technical field of quick charging. The multi-port charging circuit comprises an AC-DC module, a protocol module, a DC-DC module, a second switch module, a first switch module, a first output port group and a second output port group. And under the condition of single-port group charging, any output port group can independently provide quick charging, and the adaptability of the quick charging function is higher. Moreover, under the condition that both the first output port group and the second output port group are charged, the first output port group can still provide quick charging, so that the charging efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of fast charging technology, and in particular to a multi-port charging circuit and a charging device (the "multi" in the present application refers to at least two). Background Art

[0002] With the advancement of technology, mobile devices such as smartphones and tablets have become indispensable in people's daily life, work and study. These devices usually need to be charged frequently, so the demand for fast charging has increased accordingly.

[0003] However, in order to pursue high cost performance, most of the smart charging devices on the market currently use a shared solution, that is, a single port can be fast charged, and multiple ports are 5V slow charged; or only one port is fast charged, and the other ports are 5V slow charged. The characteristics of 5V slow charging are low power and slow charging speed.

[0004] That is, the fast charging function of the multi-port charging device on the market has limitations and is not very adaptable. The technical problem to be solved by this application is to make the fast charging function of the multi-port charging device more adaptable. Summary of the invention

[0005] The purpose of this application is to provide a multi-port charging circuit and a charging device with a more adaptable fast charging function.

[0006] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions.

[0007] In a first aspect, an embodiment of the present application provides a multi-port charging circuit, including an AC-DC module, a protocol module, a DC-DC module, a second switch module, a first switch module, a first output port group, and a second output port group;

[0008] The protocol module is connected to the control end of the first switch module and the control end of the second switch module respectively;

[0009] The output end of the AC-DC module is respectively connected to the first end of the first switch module, the first end of the DC-DC module and the first end of the second switch module;

[0010] The second end of the first switch module is connected to the first output port group;

[0011] The second end of the DC-DC module and the second end of the second switch module are both connected to the second output port group;

[0012] The AC-DC module is used to convert alternating current into direct current and output a direct current voltage;

[0013] When the first switch module is turned on and the second switch module is turned off, the first output port group provides a first fast charge;

[0014] When the first switch module is turned on and the second switch module is turned on, the first output port group provides second fast charging, and the second output port group provides normal charging; the power of the first fast charging is greater than the power of the second fast charging;

[0015] When the first switch module is disconnected and the second switch module is turned on, the second output port group provides a first fast charge;

[0016] When the first switch module is disconnected and the second switch module is disconnected, the second output port group provides normal charging.

[0017] Optionally, the second output port group includes at least one port;

[0018] The second end of the DC-DC module and the second end of the second switch module are both connected to the port.

[0019] Optionally, the multi-port charging circuit further includes a number of port switches equal to the number of ports;

[0020] The protocol module is also connected to the control terminals of all the port switches;

[0021] The second end of the DC-DC module and the second end of the second switch module are both connected to the respective ports through the port switch.

[0022] Optionally, the second output port group includes a first port and a second port; the port switch includes a first switch and a second switch;

[0023] The protocol module is also connected to the control end of the first switch and the control end of the second switch respectively;

[0024] The second end of the DC-DC module and the second end of the second switch module are both connected to the first port through the first switch;

[0025] The second end of the DC-DC module and the second end of the second switch module are both connected to the second port through the second switch.

[0026] Optionally, the number of ports in the second output port group is at least two, the number of the DC-DC modules is equal to the number of ports in the second output port group, and the number of the second switch modules is equal to the number of ports in the second output port group;

[0027] Each of the DC-DC modules and one of the second switch modules are connected in parallel to form a first medium unit;

[0028] Each port in the second output port group is connected to the output end of the AC-DC module through one of the first media units.

[0029] Optionally, the multi-port charging circuit further includes port switches, and the number of the port switches is equal to the number of ports in the second output port group;

[0030] The protocol module is also respectively connected to the control end of each of the port switches;

[0031] Each of the first media units and one of the port switches is connected in series to form a second media unit;

[0032] Each port in the second output port group is connected to the output end of the AC-DC module through a second media unit.

[0033] Optionally, each of the DC-DC modules includes an enable terminal, and the protocol module is also connected to the enable terminal of each of the DC-DC modules respectively;

[0034] When a second switch module is turned on, the DC-DC module connected in parallel with the second switch module is in a disabled state, and the port connected in series with the second switch module provides a first fast charge;

[0035] When a port switch is turned on and the DC-DC module in the first medium unit connected in series with the port switch is in an enabled state, the port connected in series with the DC-DC module provides normal charging.

[0036] Optionally, the first output port group includes a Type-C port.

[0037] Optionally, the second output port group includes USB ports.

[0038] In a second aspect, an embodiment of the present application provides a charging device, comprising the multi-port charging circuit of the first aspect.

[0039] Compared with the prior art, this application has the following beneficial effects:

[0040] In the multi-port charging circuit provided in the embodiment of the present application, the first output port group can provide fast charging only when the first output port group has a charging demand, and the second output port group can provide fast charging only when the second output port group has a charging demand, that is, in the case of charging with a single port group, any output port group can provide fast charging alone, and the fast charging function has stronger adaptability. Moreover, in the case of charging both the first output port group and the second output port group, the first output port group can still provide fast charging, thereby improving the charging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 This is a schematic diagram of the first charging circuit solution with limitations;

[0043] Figure 2 A schematic diagram of a second charging circuit solution with limitations;

[0044] Figure 3 A schematic diagram of a multi-port charging circuit provided in an embodiment of the present application;

[0045] Figure 4 A schematic diagram of a multi-port charging circuit with an enabling terminal for a DC-DC module provided in an embodiment of the present application;

[0046] Figure 5 A schematic diagram of a multi-port charging circuit with a port switch provided in an embodiment of the present application;

[0047] Figure 6 A schematic diagram of a multi-port charging circuit in which a Type-C port and a USB port are grouped, provided in an embodiment of the present application;

[0048] Figure 7 A schematic diagram of a multi-port charging circuit with multiple DC-DC modules provided in an embodiment of the present application;

[0049] Figure 8 A schematic diagram of an AC-DC module provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. The described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described in the drawings here can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0052] In the description of this application, it should be noted that relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium.

[0053] The first charging circuit scheme is as follows Figure 1 , consisting of an AC-DC module, a protocol IC, a first control switch Q1, a second control switch Q2, a third control switch Q3 and an output port. The AC-DC module is used to convert AC power into DC power. The output ports include a Type-C port, a USB1 port and a USB2 port. The protocol IC can be an XPD977 chip. The working status is as follows:

[0054] (1) Single-channel working mode: When any USB port among USB1 port and USB2 port recognizes that there is a power output demand, the protocol IC controls the AC-DC module to change the output voltage and turns on the corresponding control switch at the same time. The USB port outputs a maximum power of 30W for fast charging.

[0055] (2) Multi-channel working mode: When multiple output ports are identified to have power output requirements, the protocol IC controls the AC-DC module to change the output voltage to 5V, and the output ports share the output power. Each output port has a maximum of 5V3A and can only perform normal charging.

[0056] The second charging circuit scheme is as follows Figure 2, which consists of an AC-DC module, a protocol IC, a fourth control switch Q4, a Type-C port, a USB1 port, and a USB2 port. The protocol IC may be an IP2723T chip, and the working status is as follows:

[0057] (1) Single-channel working mode: When the Type-C port is identified as having a power output requirement, the protocol IC controls the AC-DC module to change the output voltage and turns on the fourth control switch Q4 to perform fast charging with a maximum output power of 30W. When the USB1 port or USB2 port is identified as having a power output requirement, the protocol IC controls the AC-DC module to change the output voltage to 5.5V, and the USB1 port or USB2 port performs slow charging at 5V and a power of 10W. That is, in the single-channel working mode, only the Type-C port can be fast charged.

[0058] (2) Multi-channel working mode: When the output current of USB1 port or USB2 port is greater than 20mA, the Type-C port reduces power to 20W for fast charging, while USB1 port and USB2 port perform slow charging at 5V and their total power is 10W. In other words, in multi-channel working mode, only the Type-C port can charge quickly, and the power of the Type-C port will be evenly distributed to other ports to meet the total power of 30W.

[0059] According to the analysis of the above two solutions, both have limitations:

[0060] The first charging circuit solution cannot be charged quickly in the multi-channel working mode (any port cannot be charged quickly in the multi-channel working mode, and can only output 5V for normal charging);

[0061] In the second charging circuit solution, no matter in single-channel working mode or multi-channel working mode, only one port can be quickly charged, and other ports cannot be quickly charged even in single-channel working mode.

[0062] To overcome the above limitations, please refer to Figure 3 An embodiment of the present application provides a multi-port charging circuit, including an AC-DC module 101, a protocol module 102, a DC-DC module 103, a second switch module 104, a first switch module 105, a first output port group 106 and a second output port group 107.

[0063] The AC-DC module 101 is used to convert alternating current into direct current and output a direct current voltage. For example, the AC-DC module outputs a stable 5V.

[0064] The DC-DC module 103 can be a step-down, step-up, or step-up / step-down IC, and can be a buck circuit or a buck-boost circuit.

[0065] like Figure 3 , with the following connection relationship:

[0066] The protocol module 102 is connected to the control end of the first switch module 105 and the control end of the second switch module 104 respectively;

[0067] The output end of the AC-DC module 101 is respectively connected to the first end of the first switch module 105, the first end of the DC-DC module 103, and the first end of the second switch module 104;

[0068] The second end of the first switch module 105 is connected to the first output port group 106;

[0069] The second end of the DC-DC module 103 and the second end of the second switch module 104 are both connected to the second output port group 107 .

[0070] In different conduction states, the output port groups have different functions:

[0071] When the first switch module 105 is turned on and the second switch module 104 is turned off, and the second output port group 107 has no charging demand and does not provide charging, the first output port group 106 provides a first fast charging. Assuming the power is P OMAX ;

[0072] When the first switch module 105 is turned on and the second switch module 104 is turned on, the first output port group 106 provides the second fast charge, and the second output port group 107 provides the normal charge; the power of the first fast charge is greater than the power of the second fast charge, and the power of the first fast charge may be the sum of the power of the second fast charge and the power of the second output port group charging at this time;

[0073] When the first switch module 105 is turned off and the second switch module 104 is turned on, the second output port group 107 provides a first fast charge with a power of P OMAX , the first output port group 106 does not provide charging;

[0074] When the first switch module 105 is disconnected and the second switch module 104 is disconnected, the DC-DC module 103 can enable the second output port group 107 to provide normal charging.

[0075] In the multi-port charging circuit, the first output port group can provide fast charging only when the first output port group has a charging demand, and the second output port group can provide fast charging only when the second output port group has a charging demand, that is, in the case of charging with a single port group, any output port group can provide fast charging alone, and the fast charging function has stronger adaptability. Moreover, in the case of charging both the first output port group and the second output port group, the first output port group can still provide fast charging, thereby improving the charging efficiency.

[0076] In order to save power, when there is no charging demand for the second output port group 107, the DC-DC module 103 can be disabled and turned off, thereby reducing the standby power consumption of the whole machine and also having the effect of reducing temperature rise and EMI. Figure 4 The DC-DC module 103 includes an enable terminal EN, and the protocol module 102 is also connected to the enable terminal of the DC-DC module 103 .

[0077] The number of ports in the second output port group 107 may be one or at least two.

[0078] The multi-port charging circuit may further include a number of port switches equal to the number of ports. The second end of the DC-DC module 103 and the second end of the second switch module 104 are connected to each port through the port switch, and the port switch can power off the port when there is no charging demand. The protocol module 102 is also connected to the control end of all the port switches to control the conduction and cutoff of the port switches.

[0079] The number of ports in the second output port group 107 may be at least two. Figure 5 An example is shown in which the second output port group 107 includes a first port 1071 and a second port 1072, and correspondingly, the port switch includes a first switch Q12 and a second switch Q13. The first switch module 105 may be a switch tube Q11, the second switch module 104 includes a switch tube Q10, and the protocol module 102 is further connected to the control end of the switch tube Q10, the control end of the first switch Q12, and the control end of the second switch Q13, respectively.

[0080] The second end of the DC-DC module 103 and the second end of the second switch module 104 are both connected to the first port 1071 through the first switch Q12;

[0081] The second end of the DC-DC module 103 and the second end of the second switch module 104 are both connected to the second port 1072 through the second switch Q13 .

[0082] In this way, the power on and off of the two ports can be flexibly controlled by the switch.

[0083] like Figure 6 , the first output port group 106 may be a Type-C port. The second output port group 107 may be a USB port, including a USB1 port and a USB2 port. That is, the Type-C port is a port that is prioritized for fast charging. When there is no charging demand on the Type-C port, the USB port implements fast charging.

[0084] Specifically, in single-channel working mode, each channel can achieve a power of P OMAXFast charging. In multi-channel working mode:

[0085] Charging the Type-C port and the USB1 port: When it is recognized that the output ports Type-C port and the USB1 port have output power requirements, the switch tube Q10 and the second switch Q13 are in a normally open state, the first switch Q12 and the switch tube Q11 are turned on, and the DC-DC module 103 works;

[0086] Charging the Type-C port and the USB2 port: When it is recognized that the output ports Type-C port and the USB2 port have output power requirements, the switch tube Q10 and the first switch Q12 are in a normally open state, the second switch Q13 and the switch tube Q11 are turned on, and the DC-DC module 103 works;

[0087] Charging the USB1 port and the USB2 port: When it is recognized that the output ports USB1 port and USB2 port have output power requirements, the switch tubes Q10 and Q11 are in a normally open state, the first switch Q12 and the second switch Q13 are turned on, and the DC-DC module 103 works;

[0088] Charging the Type-C port, USB1 port and USB2 port: When it is recognized that the output ports Type-C port, USB1 port and USB2 port have output power requirements, the switch tube Q10 is in a normally open state, the first switch Q12, the second switch Q13 and the switch tube Q11 are turned on, and the DC-DC module 103 works; wherein, the operation of the DC-DC module 103 corresponds to setting the signal EN1 to a high level.

[0089] The power of the Type-C port in multi-channel working mode is lower than P OMAX The output power of the AC-DC module 101 can still be P OMAX , a portion of the output power of the AC-DC module 101 is evenly distributed to other ports.

[0090] like Figure 7 , the number of DC-DC modules 103 can be equal to the number of ports in the second output port group 107, and the number of second switch modules 104 is equal to the number of ports in the second output port group 107. The connection relationship is as follows: each DC-DC module 103 and a second switch module 104 are connected in parallel to form a first intermediary unit; each port in the second output port group 107 is connected to the output end of the AC-DC module 101 through a first intermediary unit.

[0091] When a DC-DC module 103 does not need to work, it can be set to a disabled state to reduce power consumption.

[0092] Furthermore, the multi-port charging circuit may further include a port switch. Figure 7 The switch tubes Q4 and Q5 in the second output port group 107 are connected, and the number of port switches is equal to the number of ports in the second output port group 107. The protocol module 102 is also connected to the control end of each port switch respectively; each first media unit and a port switch are connected in series to form a second media unit; each port in the second output port group 107 is connected to the output end of the AC-DC module 101 through a second media unit.

[0093] Thus, more flexible power output can be achieved through the control of the DC-DC module or the port switch. For example, in one case, the power supply of the USB1 port is fast charged by the switch tube Q4, and the power supply of the USB2 port is slow charged by the DC-DC module. Or in another case, the power supply of the USB2 port is fast charged by the switch tube Q5, and the power supply of the USB1 port is slow charged by the DC-DC module.

[0094] Each DC-DC module 103 may include an enable terminal, and the protocol module 102 is also connected to the enable terminal of each DC-DC module 103. In this way, when the DC-DC module is not needed to work, the DC-DC module can be set to be disabled to save power consumption. Specifically:

[0095] When a second switch module 104 is turned on, the DC-DC module 103 connected in parallel with the second switch module 104 is in a non-enabled state, and the port connected in series with the second switch module 104 provides a first fast charge; when a port switch is turned on and the DC-DC module 103 in the first medium unit connected in series with the port switch is in an enabled state, the port connected in series with the DC-DC module 103 provides a normal charge.

[0096] Figure 8 An implementation of an AC-DC module 101 is shown, where chip U1 is a PWM power IC, such as LD5555. Chip U2 is a synchronous rectification IC, such as LD8526. The protocol module can output an analog voltage to NetC1_2 according to the protocol, thereby controlling the brightness of the optocoupler U3A, thereby controlling the state of U3B, and thereby changing the voltage of capacitor C16, thereby changing the output voltage or power characteristics of the entire AC-DC.

[0097] Based on the above embodiments, the embodiments of the present application further provide a charging device, including the above multi-port charging circuit.

[0098] In general, the present application proposes a multi-port charging circuit and a charging device. When charging with a single port group, any output port group can provide fast charging independently, and the fast charging function has stronger adaptability. Moreover, when both the first output port group and the second output port group are charged, the first output port group can still provide fast charging, thereby improving the charging efficiency.

[0099] The above-described device and system embodiments are merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. A person skilled in the art may understand and implement the present embodiment without creative effort.

[0100] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A multi-port charging circuit, characterized in that: It comprises an AC-DC module (101), a protocol module (102), a DC-DC module (103), a second switch module (104), a first switch module (105), a first output port group (106) and a second output port group (107); The protocol module (102) is respectively connected to a control end of the first switch module (105) and a control end of the second switch module (104); The output end of the AC-DC module (101) is respectively connected to the first end of the first switch module (105), the first end of the DC-DC module (103), and the first end of the second switch module (104); The second end of the first switch module (105) is connected to the first output port group (106); The second end of the DC-DC module (103) and the second end of the second switch module (104) are both connected to the second output port group (107); The AC-DC module (101) is used to convert alternating current into direct current and output a direct current voltage; When the first switch module (105) is turned on and the second switch module (104) is turned off, the first output port group (106) provides a first fast charge; When the first switch module (105) is turned on and the second switch module (104) is turned on, the first output port group (106) provides second fast charging, and the second output port group (107) provides normal charging; the power of the first fast charging is greater than the power of the second fast charging; When the first switch module (105) is disconnected and the second switch module (104) is turned on, the second output port group (107) provides a first fast charge; When the first switch module (105) is disconnected and the second switch module (104) is disconnected, the second output port group (107) provides normal charging.

2. The multi-port charging circuit according to claim 1, characterized in that: The second output port group (107) includes at least one port; The second end of the DC-DC module (103) and the second end of the second switch module (104) are both connected to the port.

3. The multi-port charging circuit as claimed in claim 2, characterized in that: The multi-port charging circuit also includes a number of port switches equal to the number of ports; The protocol module (102) is also connected to the control terminals of all the port switches; The second end of the DC-DC module (103) and the second end of the second switch module (104) are both connected to the respective ports through the port switch.

4. The multi-port charging circuit as claimed in claim 3, characterized in that: The second output port group (107) includes a first port (1071) and a second port (1072); the port switch includes a first switch (Q12) and a second switch (Q13); The protocol module (102) is also connected to the control end of the first switch (Q12) and the control end of the second switch (Q13) respectively; The second end of the DC-DC module (103) and the second end of the second switch module (104) are both connected to the first port (1071) via the first switch (Q12); The second end of the DC-DC module (103) and the second end of the second switch module (104) are both connected to the second port (1072) via the second switch (Q13).

5. The multi-port charging circuit as claimed in claim 1, characterized in that: The number of ports in the second output port group (107) is at least two, the number of the DC-DC modules (103) is equal to the number of ports in the second output port group (107), and the number of the second switch modules (104) is equal to the number of ports in the second output port group (107); Each of the DC-DC modules (103) and one of the second switch modules (104) are connected in parallel to form a first medium unit; Each port in the second output port group (107) is connected to the output end of the AC-DC module (101) via one of the first intermediary units.

6. The multi-port charging circuit as claimed in claim 5, characterized in that: The multi-port charging circuit further comprises port switches, the number of the port switches being equal to the number of ports in the second output port group (107); The protocol module (102) is also respectively connected to the control end of each of the port switches; Each of the first media units and a port switch is connected in series to form a second media unit; Each port in the second output port group (107) is connected to the output end of the AC-DC module (101) via a second intermediary unit.

7. The multi-port charging circuit according to claim 6, characterized in that: Each of the DC-DC modules (103) comprises an enable terminal, and the protocol module (102) is also respectively connected to the enable terminal of each of the DC-DC modules (103); When a second switch module (104) is turned on, the DC-DC module (103) connected in parallel to the second switch module (104) is in a non-enabled state, and the port connected in series to the second switch module (104) provides a first fast charge; When a port switch is turned on and the DC-DC module (103) in the first medium unit connected in series with the port switch is in an enabled state, the port connected in series with the DC-DC module (103) provides normal charging.

8. The multi-port charging circuit as claimed in claim 1, characterized in that: The first output port group (106) includes a Type-C port.

9. The multi-port charging circuit according to claim 1, characterized in that: The second output port group (107) includes USB ports.

10. A charging device, characterized in that: A multi-port charging circuit comprising any one of claims 1-9.

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