Charging circuit and charging device

Abstract

The utility model relates to the technical field of charging, and relates to a charging circuit and a charging device. The charging circuit comprises a first power conversion module, a second power conversion module, a first PD protocol chip, a second PD protocol chip, a first output port and a second output port, the first power conversion module is connected with an external power supply, the first output port and the first PD protocol chip, the first PD protocol chip is connected with the first output port, and the second PD protocol chip is connected with the second output port. The first power conversion module is connected with an external power supply, a first output port and a first PD protocol chip, the second power conversion module is connected with an external power supply, a second output port and a second PD protocol chip, the second PD protocol chip is connected with the second output port, the first PD protocol chip and the second PD protocol chip have the same model, a selection pin of the first PD protocol chip is set to be at a high level so as to call a first PDO protocol, a selection pin of the second PD protocol chip is set to be at a low level so as to call a second PDO protocol. The second PDO protocol is different from the first PDO protocol. The design and verification workload can be reduced, and the material warehouse management difficulty and cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of charging technology, and in particular to a charging circuit and a charging device. Background Technology

[0002] With the increasing popularity of electronic devices, users have higher and higher demands for charging devices, especially for multi-port chargers.

[0003] To meet the charging needs of different devices, charging devices typically require a separate protocol chip for each output port to support varying power outputs. For example, the first output port might be configured with a protocol chip supporting 60W power transmission, while the second output port would require a protocol chip supporting 100W power transmission. Each output port necessitates the separate design and verification of its corresponding protocol chip, increasing the design and verification workload, leading to an increase in the variety of materials, and raising the complexity and cost of warehouse management. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide a charging circuit and charging device to solve the problems of large workload in designing and verifying charging devices to achieve different power outputs, and high difficulty and cost in material warehouse management in the prior art.

[0005] This utility model discloses a charging circuit, including a first power conversion module, a second power conversion module, a first PD protocol chip, a second PD protocol chip, a first output port, and a second output port. The first power conversion module is connected to an external power supply, the first output port, and the first PD protocol chip. The first PD protocol chip is connected to the first output port. The second power conversion module is connected to an external power supply, the second output port, and the second PD protocol chip. The second PD protocol chip is connected to the second output port. The first PD protocol chip and the second PD protocol chip are of the same model. The selection pin of the first PD protocol chip is set to a high level to call the first PDO protocol, and the selection pin of the second PD protocol chip is set to a low level to call the second PDO protocol. The second PDO protocol is different from the first PDO protocol.

[0006] Optionally, the select pin of the first PD protocol chip is left floating, while the select pin of the second PD protocol chip is grounded.

[0007] Optionally, the first power conversion module includes a first buck-boost control chip and a first voltage conversion unit. The input terminal of the first voltage conversion unit is connected to an external power supply, the output terminal is connected to the first output port, and the control terminal is connected to the first buck-boost control chip. The first buck-boost control chip is also connected to the first PD protocol chip.

[0008] Optionally, the second power conversion module includes a second buck-boost control chip and a second voltage conversion unit. The input terminal of the second voltage conversion unit is connected to an external power supply, the output terminal is connected to the second output port, and the control terminal is connected to the second buck-boost control chip. The second buck-boost control chip is also connected to the second PD protocol chip.

[0009] Optionally, the first buck-boost control chip and the second buck-boost control chip are of the same model.

[0010] Optionally, the first voltage conversion unit includes a first MOSFET, a second MOSFET, a third MOSFET, a fourth MOSFET, and a first inductor. The first MOSFET and the second MOSFET are connected in series, with the series connection node connected to one end of the first inductor. The third MOSFET and the fourth MOSFET are connected in series, with the series connection node connected to the other end of the first inductor. The drain of the first MOSFET is connected to an external power supply. The source of the second MOSFET is grounded. The drain of the third MOSFET is connected to the first output port. The source of the fourth MOSFET is grounded. The gates of the first MOSFET, the second MOSFET, the third MOSFET, and the fourth MOSFET are all connected to the first buck-boost control chip.

[0011] Optionally, the second voltage conversion unit includes a fifth MOSFET, a sixth MOSFET, a seventh MOSFET, an eighth MOSFET, and a second inductor. The fifth MOSFET and the sixth MOSFET are connected in series, with the series connection node connected to one end of the second inductor. The seventh MOSFET and the eighth MOSFET are connected in series, with the series connection node connected to the other end of the second inductor. The drain of the fifth MOSFET is connected to an external power supply, the source of the sixth MOSFET is grounded, the drain of the seventh MOSFET is connected to the second output port, and the source of the eighth MOSFET is grounded. The gates of the fifth, sixth, seventh, and eighth MOSFETs are all connected to the second buck-boost control chip.

[0012] Optionally, the first output port is a Type-C interface.

[0013] Optionally, the second output port is a Type-C interface.

[0014] This utility model also discloses a charging device, including a housing, a circuit board, and a charging circuit as described in any of the above. The first power conversion module, the second power conversion module, the first PD protocol chip, the second PD protocol chip, the first output port, and the second output port of the charging circuit are all disposed on the circuit board. The circuit board is disposed inside the housing, and the first output port and the second output port are partially exposed outside the housing.

[0015] Compared with the prior art, the beneficial effects of the charging circuit and charging device provided by this utility model embodiment are as follows: by setting a first power conversion module, a second power conversion module, a first PD protocol chip, a second PD protocol chip, a first output port and a second output port, the first PD protocol chip and the second PD protocol chip use the same model of chip, and by setting the selection pins of the first PD protocol chip and the second PD protocol chip to high level and low level respectively, different PDO protocols are called respectively, and they negotiate and communicate with the devices connected to the first output port and the second output port respectively. The first power conversion module and the second power conversion module respectively convert the input voltage of the external power supply into voltage and current suitable for the first output port and the second output port, thereby meeting the output of different power. Since the first output port and the second output port are configured with the same model of PD protocol chip, the same material is used, reducing the types of materials, reducing the design and verification workload, and reducing the difficulty and cost of material warehouse management. Attached Figure Description

[0016] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0017] Figure 1 This is a structural block diagram of the charging circuit provided in an embodiment of the present invention;

[0018] Figure 2 This is a circuit schematic diagram of the first PD protocol chip provided in this embodiment of the present invention;

[0019] Figure 3 This is a circuit diagram of the first buck-boost control chip provided in this embodiment of the present invention;

[0020] Figure 4 This is a circuit diagram of the first voltage conversion unit provided in this embodiment of the present invention;

[0021] Figure 5 This is a circuit schematic diagram of the second PD protocol chip provided in this embodiment of the present invention;

[0022] Figure 6 This is a circuit diagram of the second buck-boost control chip provided in this embodiment of the present invention;

[0023] Figure 7 This is a circuit diagram of the second voltage conversion unit provided in an embodiment of the present invention.

[0024] The labels for the attached figures are as follows:

[0025] 110, First power conversion module; 111, First buck-boost control chip; 112, First voltage conversion unit; 120, Second power conversion module; 121, Second buck-boost control chip; 122, Second voltage conversion unit; 130, First PD protocol chip; 130a, Select pin; 140, Second PD protocol chip; 150, First output port; 160, Second output port;

[0026] Q1, first MOSFET; Q2, second MOSFET; Q3, third MOSFET; Q4, fourth MOSFET; Q5, fifth MOSFET; Q6, sixth MOSFET; Q7, seventh MOSFET; Q8, eighth MOSFET; L1, first inductor; L2, second inductor. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] This utility model embodiment provides a charging circuit, such as Figure 1 , Figure 2 and Figure 5 The charging circuit includes a first power conversion module 110, a second power conversion module 120, a first PD protocol chip 130, a second PD protocol chip 140, a first output port 150, and a second output port 160. The first power conversion module 110 is connected to an external power supply, the first output port 150, and the first PD protocol chip 130. The first PD protocol chip 130 is connected to the first output port 150. The second power conversion module 120 is connected to an external power supply, the second output port 160, and the second PD protocol chip 140. The second PD protocol chip 140 is connected to the second output port 160. The first PD protocol chip 130 and the second PD protocol chip 140 are of the same model. The selection pin 130a of the first PD protocol chip 130 is set to a high level to call the first PDO protocol, and the selection pin 130a of the second PD protocol chip 140 is set to a low level to call the second PDO protocol. The second PDO protocol is different from the first PDO protocol.

[0029] The charging circuit of this embodiment comprises a first power conversion module 110, a second power conversion module 120, a first PD protocol chip 130, a second PD protocol chip 140, a first output port 150, and a second output port 160. The first PD protocol chip 130 and the second PD protocol chip 140 are of the same model. By setting the selection pin 130a of the first PD protocol chip 130 and the second PD protocol chip 140 to a high level and a low level, respectively, different PDO protocols are invoked to negotiate and communicate with the devices connected to the first output port 150 and the second output port 160. The first power conversion module 110 and the second power conversion module 120 convert the input voltage of the external power supply into voltage and current suitable for the first output port 150 and the second output port 160, thereby meeting the output requirements of different power levels. Since the first output port 150 and the second output port 160 are configured with the same model of PD protocol chip, the same material is used, reducing the types of materials, reducing the workload of design and verification, and reducing the difficulty and cost of material warehouse management.

[0030] The PDO protocol, part of the PD protocol, defines the power transfer parameters between the device and the charging unit, including voltage, current, and power. The first PDO protocol differs from the second PDO protocol in that it defines different voltage, current, and power parameters. Therefore, the first power conversion module 110 and the second power conversion module 120 require different output power to meet different power output demands. Optionally, the first PDO protocol corresponds to an output power of 60W, and the second PDO protocol corresponds to an output power of 100W.

[0031] Optionally, the first PD protocol chip 130 and the second PD protocol chip 140 can be of the IP2723 model, etc.

[0032] refer to Figure 1 , Figure 2 and Figure 5 In an optional embodiment of this application, the selection pin 130a of the first PD protocol chip 130 is left floating, and the selection pin 130a of the second PD protocol chip 140 is grounded. Specifically, when the selection pin 130a of the first PD protocol chip 130 is left floating, its selection pin 130a is at a high level; when the selection pin 130a of the second PD protocol chip 140 is grounded, its selection pin 130a is at a low level. Using floating and grounding to set the high and low levels of the selection pin 130a simplifies circuit design. Compared to other methods, such as using external resistors or level shifters to set the high and low levels, the floating and grounding method is more direct and simpler, and the circuit cost is also lower. Furthermore, compared to using external resistors or other methods to set the level of the PD protocol chip selection pin 130a, the floating and grounding method does not consume additional power due to the lack of external resistors, resulting in lower power consumption.

[0033] In specific implementation, refer to Figure 1 , Figure 2 and Figure 5 The selection pin 130a of the first PD protocol chip 130 and the second PD protocol chip 140 is defined as the SCK pin.

[0034] refer to Figure 3 In an optional embodiment of this application, the first power conversion module 110 includes a first buck-boost control chip 111 and a first voltage conversion unit 112. The input terminal of the first voltage conversion unit 112 is connected to an external power supply, the output terminal is connected to a first output port 150, and the control terminal is connected to the first buck-boost control chip 111. The first buck-boost control chip 111 is also connected to a first PD protocol chip 130.

[0035] Specifically, an external power source provides input power to the first power conversion module 110 by connecting to the input terminal of the first voltage conversion unit 112. The first PD protocol chip 130 communicates with the device connected to the first output port 150 to negotiate voltage and current parameters. The first buck-boost control chip 111 controls the first voltage conversion unit 112 to convert the external power source into a suitable voltage and current according to the voltage and current parameters negotiated by the first PD protocol chip 130, which is then output through the first output port 150 to meet the charging needs of the connected device and achieve efficient charging.

[0036] Optionally, the first buck-boost control chip 111 can be a buck-boost control chip such as PL5501 or LYF63303.

[0037] Optional, see reference Figures 2 to 4 The first voltage conversion unit 112 includes a first MOSFET Q1, a second MOSFET Q2, a third MOSFET Q3, a fourth MOSFET Q4, and a first inductor L1. The first MOSFET Q1 and the second MOSFET Q2 are connected in series, and the series connection node is connected to one end of the first inductor L1. The third MOSFET Q3 and the fourth MOSFET Q4 are connected in series, and the series connection node is connected to the other end of the first inductor L1. The drain of the first MOSFET Q1 is connected to an external power supply. The source of the second MOSFET Q2 is grounded. The drain of the third MOSFET Q3 is connected to the first output port 150. The source of the fourth MOSFET Q4 is grounded. The gates of the first MOSFET Q1, the second MOSFET Q2, the third MOSFET Q3, and the fourth MOSFET Q4 are all connected to the first buck-boost control chip 111.

[0038] Specifically, the first buck-boost control chip 111 outputs a PWM signal to control the on and off states of the first MOSFET Q1, the second MOSFET Q2, the third MOSFET Q3, and the fourth MOSFET Q4. By adjusting the duty cycle of the PWM signal, the on-time of each MOSFET is controlled. In conjunction with the first inductor L1, the output voltage is adjusted to meet different power output requirements. The first voltage conversion unit 112, using the above circuit, has a wide voltage input range. The voltage of the external power supply can be higher, lower, or equal to the output voltage, providing flexible voltage input.

[0039] refer to Figures 5 to 7 In an optional embodiment of this application, the second power conversion module 120 includes a second buck-boost control chip 121 and a second voltage conversion unit 122. The input terminal of the second voltage conversion unit 122 is connected to an external power supply, the output terminal is connected to a second output port 160, and the control terminal is connected to the second buck-boost control chip 121. The second buck-boost control chip 121 is also connected to a second PD protocol chip 140.

[0040] Specifically, an external power source provides input power to the second power conversion module 120 by connecting to the input terminal of the second voltage conversion unit 122. The second PD protocol chip 140 communicates with the device connected to the second output port 160 to negotiate voltage and current parameters. The second buck-boost control chip 121 controls the external power source of the second voltage conversion unit 122 to convert it into a suitable voltage and current according to the voltage and current parameters negotiated by the first PD protocol chip 130, which is then output through the second output port 160 to meet the charging needs of the connected device and achieve efficient charging.

[0041] Optional, continue to refer to Figures 5 to 7 The second voltage conversion unit 122 includes a fifth MOSFET Q5, a sixth MOSFET Q6, a seventh MOSFET Q7, an eighth MOSFET Q8, and a second inductor L2. The fifth MOSFET Q5 and the sixth MOSFET Q6 are connected in series, and the series connection node is connected to one end of the second inductor L2. The seventh MOSFET Q7 and the eighth MOSFET Q8 are connected in series, and the series connection node is connected to the other end of the second inductor L2. The drain of the fifth MOSFET Q5 is connected to an external power supply. The source of the sixth MOSFET Q6 is grounded. The drain of the seventh MOSFET Q7 is connected to the second output port 160. The source of the eighth MOSFET Q8 is grounded. The gates of the fifth MOSFET Q5, the sixth MOSFET Q6, the seventh MOSFET Q7, and the eighth MOSFET Q8 are all connected to the second buck-boost control chip 121.

[0042] Specifically, the second buck-boost control chip 121 outputs a PWM signal to control the conduction and cutoff of the fifth MOSFET Q5, the sixth MOSFET Q6, the seventh MOSFET Q7, and the eighth MOSFET Q8. By adjusting the duty cycle of the PWM signal, the conduction time of each MOSFET is controlled. In conjunction with the second inductor L2, the output voltage is adjusted to meet different power output requirements. The second voltage conversion unit 122 adopts the above circuit, which has a wide voltage input range. The voltage of the external power supply can be higher, lower, or equal to the output voltage, providing flexible voltage input.

[0043] In an optional embodiment of this application, the first buck-boost control chip 111 and the second buck-boost control chip 121 are of the same model. Using the same model of buck-boost control chip can simplify the circuit design and management process, reduce the design and verification difficulty, make it easier for designers to maintain and adjust the entire circuit, and reduce the types of materials, thereby reducing the difficulty and cost of material warehouse management.

[0044] In an optional embodiment of this application, the first output port 150 is a Type-C interface.

[0045] The Type-C interface is highly versatile and can be used to connect various devices, such as smartphones, tablets, and laptops. The Type-C interface features a reversible design, eliminating concerns about incorrect insertion and making plugging and unplugging easier, thus improving the user experience.

[0046] Optionally, the second output port 160 also uses a Type-C interface.

[0047] This utility model embodiment also provides a charging device, including a housing, a circuit board and a charging circuit as described above. The first power conversion module 110, the second power conversion module 120, the first PD protocol chip 130, the second PD protocol chip 140, the first output port 150 and the second output port 160 of the charging circuit are all disposed on the circuit board, which is disposed inside the housing. The first output port 150 and the second output port 160 are partially exposed outside the housing.

[0048] The circuit board provides a carrier for the various modules, chips, and output ports of the charging circuit. The housing provides additional protection for the circuit board and the components mounted on it, preventing the circuit board from being affected or damaged by the external environment. Meanwhile, the partially exposed output ports allow users to easily connect devices.

[0049] The charging circuit of the charging device in this embodiment of the application sets up a first power conversion module 110, a second power conversion module 120, a first PD protocol chip 130, a second PD protocol chip 140, a first output port 150, and a second output port 160. The first PD protocol chip 130 and the second PD protocol chip 140 are of the same model. By setting the selection pin 130a of the first PD protocol chip 130 and the second PD protocol chip 140 to a high level and a low level respectively, different PDO protocols are invoked to negotiate and communicate with the devices connected to the first output port 150 and the second output port 160 respectively. The first power conversion module 110 and the second power conversion module 120 convert the input voltage of the external power supply into voltage and current suitable for the first output port 150 and the second output port 160 respectively, thereby meeting the output of different power. Since the first output port 150 and the second output port 160 are configured with the same model of PD protocol chip and the same material, the types of materials are reduced, the design and verification workload is reduced, and the difficulty and cost of material warehouse management are reduced.

[0050] This charging device includes the same structure and beneficial effects as the charging circuit in the foregoing embodiments. The structure and beneficial effects of the charging circuit have been described in detail in the foregoing embodiments and will not be repeated here.

[0051] It should be understood that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of this utility model.

Claims

1. A charging circuit, characterized by, The system includes a first power conversion module, a second power conversion module, a first PD protocol chip, a second PD protocol chip, a first output port, and a second output port. The first power conversion module is connected to an external power supply, the first output port, and the first PD protocol chip. The first PD protocol chip is connected to the first output port. The second power conversion module is connected to an external power supply, the second output port, and the second PD protocol chip. The second PD protocol chip is connected to the second output port. The first PD protocol chip and the second PD protocol chip are of the same model. The select pin of the first PD protocol chip is set to a high level to invoke the first PDO protocol. The select pin of the second PD protocol chip is set to a low level to invoke the second PDO protocol. The second PDO protocol is different from the first PDO protocol.

2. The charging circuit of claim 1, wherein, The select pin of the first PD protocol chip is left floating, while the select pin of the second PD protocol chip is grounded.

3. The charging circuit according to claim 1 or 2, characterized in that, The first power conversion module includes a first buck-boost control chip and a first voltage conversion unit. The input terminal of the first voltage conversion unit is connected to an external power supply, the output terminal is connected to the first output port, and the control terminal is connected to the first buck-boost control chip. The first buck-boost control chip is also connected to the first PD protocol chip.

4. The charging circuit of claim 3, wherein, The second power conversion module includes a second buck-boost control chip and a second voltage conversion unit. The input terminal of the second voltage conversion unit is connected to an external power supply, the output terminal is connected to the second output port, and the control terminal is connected to the second buck-boost control chip. The second buck-boost control chip is also connected to the second PD protocol chip.

5. The charging circuit of claim 4, wherein, The first buck-boost control chip and the second buck-boost control chip have the same model.

6. The charging circuit of claim 3, wherein, The first voltage conversion unit includes a first MOSFET, a second MOSFET, a third MOSFET, a fourth MOSFET, and a first inductor. The first MOSFET and the second MOSFET are connected in series, with the series connection node connected to one end of the first inductor. The third MOSFET and the fourth MOSFET are connected in series, with the series connection node connected to the other end of the first inductor. The drain of the first MOSFET is connected to an external power supply. The source of the second MOSFET is grounded. The drain of the third MOSFET is connected to the first output port. The source of the fourth MOSFET is grounded. The gates of the first MOSFET, the second MOSFET, the third MOSFET, and the fourth MOSFET are all connected to the first buck-boost control chip.

7. The charging circuit of claim 4, wherein, The second voltage conversion unit includes a fifth MOSFET, a sixth MOSFET, a seventh MOSFET, an eighth MOSFET, and a second inductor. The fifth MOSFET and the sixth MOSFET are connected in series, with the series connection node connected to one end of the second inductor. The seventh MOSFET and the eighth MOSFET are connected in series, with the series connection node connected to the other end of the second inductor. The drain of the fifth MOSFET is connected to an external power supply, the source of the sixth MOSFET is grounded, the drain of the seventh MOSFET is connected to the second output port, and the source of the eighth MOSFET is grounded. The gates of the fifth, sixth, seventh, and eighth MOSFETs are all connected to the second buck-boost control chip.

8. The charging circuit according to claim 1 or 2, characterized by The first output port is a Type-C interface.

9. The charging circuit according to claim 1 or 2, characterized by The second output port is a Type-C interface.

10. A charging device, characterized by The device includes a housing, a circuit board, and a charging circuit as described in any one of claims 1-9. The first power conversion module, the second power conversion module, the first PD protocol chip, the second PD protocol chip, the first output port, and the second output port of the charging circuit are all disposed on the circuit board, which is disposed inside the housing. The first output port and the second output port are both partially exposed outside the housing.

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