Circuit for charging power supply using type-c interface and portable electronic device

Abstract

The application discloses a circuit for charging and supplying power by using a TYPE-C interface and a portable electronic device in the technical field of portable electronic device charging and power supply. 2 The C bus is in communication connection with the protocol processing unit and the charging management unit, and is used for controlling protocol negotiation and power supply parameter setting. 2 The C bus is in communication connection with the protocol processing unit and the charging management unit, and is used for controlling protocol negotiation and power supply parameter setting. The charging management unit works in a narrow voltage direct current (NVDC) mode and accepts the charging parameter setting transmitted by the host control unit, and the above scheme solves the problems of single function of the Type-C interface and poor compatibility of old devices in the prior art, and achieves the technical effects of reducing cost, reducing size and improving charging efficiency.

Description

Technical Field

[0001] This utility model relates to the field of portable electronic device charging and power supply technology, specifically a circuit and portable electronic device that use a TYPE-C interface for charging and power supply. Background Technology

[0002] With the adoption rate of USB Type-C interface in 3C consumer electronics products exceeding 93%, the problems of interface redundancy and poor protocol compatibility of traditional power banks are becoming increasingly prominent. Currently, they mainly face three technical bottlenecks: (1) the traditional dual-interface design occupies PCB space; (2) older devices cannot be adapted to the PD fast charging protocol; and (3) there is a lack of intelligent charging and discharging role switching mechanism.

[0003] Currently, the charging and power supply functions of the Type-C interface mainly rely on the USB PD protocol for negotiation. Role recognition, power configuration, and protection mechanisms are realized through the CC pin. The charging and power supply circuit based on the Type-C interface generally adopts the architecture of "protocol controller + power management chip (PMIC)". Standardized PD communication is realized through protocol control unit, power conversion unit, physical interface unit, protection unit, etc. However, the cost is high, with the cost of the protocol chip accounting for 30%-50%. In addition, the need to adapt to the fixed pin definition of the chip limits the flexibility of hardware design and causes problems such as insufficient compatibility with niche protocols such as QC4+, SCP, and VOOC fast charging protocols. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a circuit and portable electronic device that uses a TYPE-C interface for charging and power supply, thereby solving the problems of poor hardware design flexibility and poor protocol compatibility in existing technologies.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A circuit for charging and powering using a Type-C interface includes a Type-C interface unit, a main control unit, a protocol processing unit, a charging management unit, a synchronous step-up / step-down power switch, and a battery pack. The main control unit communicates with the protocol processing unit and the charging management unit via an I²C bus to control protocol negotiation and power parameter settings. The protocol processing unit communicates with the Type-C interface unit via a CC pin to negotiate charging and discharging protocols and identify device roles. The charging management unit is connected to the protocol processing unit and the Type-C interface unit, and is also connected to the battery pack. It uses a synchronous step-up / step-down power switch for voltage conversion and power output. The charging management unit operates in narrow-voltage DC (NVDC) mode and receives charging parameter settings from the main control unit.

[0006] Preferably, the data pins of the TYPE-C interface unit are also connected to ESD electrostatic protection devices and electromagnetic interference suppression devices.

[0007] Preferably, the charging management unit uses SYV976.

[0008] Preferably, the protocol processing unit adopts a PD protocol controller, which integrates a full protocol stack of USB PD3.0, PPS and QC4.0+.

[0009] Preferably, the synchronous step-up / step-down power switch uses the TDM3478 chip.

[0010] Preferably, the protocol processing unit uses the CH224Q chip.

[0011] Preferably, the electromagnetic interference suppression device uses a common-mode filter.

[0012] Preferably, the electrostatic discharge protection device uses an SM712 diode.

[0013] Preferably, the battery pack has a built-in BMS battery management module, which provides the battery pack's own power and status information.

[0014] Based on the same inventive concept, this application also uses the following solution: A portable electronic device includes the aforementioned circuitry that is charged and powered via a TYPE-C interface.

[0015] This application proposes a circuit and portable electronic device for charging and powering using a Type-C interface. Based on the USB Type-C interface standard, it integrates charging and power supply functions. Through hardware circuit innovation, it solves industry pain points such as the single function of the Type-C interface and poor compatibility with older devices. It supports a maximum power transmission of 100W and can provide power and charging for the system power supply. The layout of this solution is simple, the hardware cost is less than half that of existing technologies, the size can be made very small, the charging efficiency is improved by 20%, it provides Type-C charging for devices below 100W, and it is compatible with current mainstream PD protocol charging devices. Attached Figure Description

[0016] Figure 1 A schematic block diagram of an embodiment of the circuit for charging and powering using the TYPE-C interface in this application; Figure 2 Example of peripheral circuitry for an embodiment of the circuit protocol processing unit and TYPE-C interface unit that uses the TYPE-C interface for charging and power supply in this application; Figure 3 Example of peripheral circuitry for a circuit power management unit that uses a TYPE-C interface for charging and power supply in this application; Among them, 1: Protocol processing unit, 2: Main control unit, 3: Charging management unit, 31: Synchronous step-up power switch, 4: Battery pack, 5: System power supply output, 6: TYPE-C interface unit, 71: ESD electrostatic protection device, 72: Electromagnetic interference suppression device. Detailed Implementation

[0017] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0018] This embodiment provides a technical solution: a circuit for charging and powering using a TYPE-C interface, comprising a TYPE-C interface unit 6, a main control unit 2, a protocol processing unit 1, a charging management unit 3, a synchronous step-up / step-down power switch 31, and a battery pack 4. In this embodiment, the TYPE-C interface 6 adopts a simplified 16-pin board-mounted Type-C female connector, supporting reversible insertion, and integrating CC (Configuration Channel) pins, SBU (Sideband Use) pins, and VBUS / VGND power channels. The CC pins include CC1 and CC2 pins, used for detecting connection direction, role recognition, and power negotiation; the SBU pins include SBU1 and SBU2 pins, serving as backup signal channels, configurable as audio signals or USB 3.1 differential pairs; the VBUS pins are the main power channel, connected to the charging management unit 3 and the synchronous step-up / step-down power switch 31 via a current sampling resistor.

[0019] In this embodiment, the TYPE-C interface unit 6 can be connected to an adapter with protocols such as PD3.0 or a compatible power bank. The protocol processing unit 1 uses a CH224Q chip and communicates with the main control unit 2 via I²C. It dynamically sets the PD protocol output voltage value according to the external power supply protocol device. The main control unit 2 controls the charging management unit 3 via the I²C bus. The battery pack 4 has a built-in BMS battery management module. The interface of the battery pack 4 includes SMBUS bus pins, which can output the battery power and status information in real time. The system power supply output 5 provides a dynamically settable voltage for system power supply. In this embodiment, the voltage range is 1.024-19.2V.

[0020] The protocol processing unit 1 employs a PD protocol controller, integrating a full protocol stack of USB PD3.0, PPS (Programmable Power Supply), and QC4.0+. The workflow is as follows: Initially, after the CC pin detects the Sink device being connected, it enters negotiation mode and then negotiates the protocol: PD message frames are exchanged via the CC line to obtain the Sink's voltage / current requirements, such as a request for 19V / 3.32A. Then, the protocol processing unit 1 indirectly controls the charging management unit 3 to adjust the output parameters via the I²C interface, while simultaneously supplying power to the charging management unit 3, thus enabling the configuration to take effect. During charging, dynamic adjustment of PPS based on load changes is supported.

[0021] The charging management unit 3 is a switch-mode battery charging control unit. This unit drives four synchronous step-up / step-down power switches 31 to support a wide input voltage range and multiple lithium-ion / lithium-polymer batteries. The integrated circuit provides comprehensive protection mechanisms during charging to ensure safety. The controller operates in a narrow-voltage DC (NVDC) mode. This feature ensures that the system voltage will not fall below the set minimum system voltage even if the battery is depleted or removed. In NVDC mode, the charging current drops to the pre-charge level. The unit also features Dynamic Power Management (DPM) to prevent AC adapter overload. The host control interface enables flexible system configuration, integrating ADC monitoring of voltage, current, and power overheat protection, input / system / battery overvoltage protection, and input / MOSFET / inductor overcurrent protection. In addition to battery charging, the charging management unit 3 also enables direct USB OTG connection to mobile terminals, allowing the battery pack 4 to power the input port in reverse. In this embodiment, the charging management unit 3 uses the SYV976 from XILGE, and the synchronous step-up / step-down power switches 31 use the TDM3478 chip.

[0022] The main control unit 2 is connected to the protocol processing unit 1 and the charging management unit 3 via the I²C bus. It is used to control protocol negotiation and power parameter setting. On the one hand, it controls the protocol processing unit 1 to obtain compatible protocol communication and draw power to the downstream devices through the I²C bus. On the other hand, it sets the charging voltage and current of the charging management unit 3 through the I²C bus.

[0023] In this embodiment, the battery pack 4 has a built-in BMS battery management module. The BMS battery management module is used for current monitoring, internal resistance estimation and / or voltage monitoring, and temperature monitoring. The first battery pack 5 and the second battery pack 6 support communication with the main control unit 4 via SMBUS bus and transmit the monitoring data to the main control unit 4 in real time. For example, the battery pack 4's power and status information can be output in real time.

[0024] The data pins of the TYPE-C interface unit 6 are also connected to an ESD electrostatic protection device 71 and an electromagnetic interference suppression device 72 to form a protection and peripheral circuit. Together with other peripheral circuits, they provide a stable power supply to the system. In this embodiment, the ESD protection device 71 uses an SM712 diode, connected across the data pin and ground. The electromagnetic interference suppression device 72 uses a common-mode filter, such as the ACM2012-900-2P-T001 from Todenka. The entire circuit using the TYPE-C interface for charging and power supply features a wide input voltage of 9V-20V, multi-level output adjustment of 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, and 20V / 5A, and comprehensive overcurrent, overvoltage, and overtemperature protection mechanisms. This embodiment of the circuit using the TYPE-C interface for charging and power supply can provide power to a 100W system. This embodiment of the circuit using the TYPE-C interface for charging and power supply can also use a power bank to power the device.

[0025] Based on the same inventive concept, this application also discloses a portable electronic device, including the aforementioned circuit for charging and powering via a TYPE-C interface. This embodiment is currently applied to a portable oxygen concentrator project, and after actual testing and operation, its feasibility is excellent, and customer feedback is positive. Because it supports the USB PD (Power Delivery) protocol, the maximum output power can reach 100W, and it is compatible with USB 2.0 / 3.1 data transfer functions, making it suitable for power supply needs in various scenarios such as laptops, smart terminals, and industrial control equipment.

[0026] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A circuit that uses a TYPE-C interface for charging and power supply, characterized in that: The device includes a TYPE-C interface unit (6), a main control unit (2), a protocol processing unit (1), a charging management unit (3), a synchronous step-up power switch (31), and a battery pack (4). The main control unit (2) communicates with the protocol processing unit (1) and the charging management unit (3) via the I²C bus and is used to control protocol negotiation and power parameter settings. The protocol processing unit (1) communicates with the TYPE-C interface unit (6) via the CC pin and is used to negotiate the charging and discharging protocol and identify the device role. The charging management unit (3) is connected to the protocol processing unit (1) and the Type-C interface unit (6) and is connected to the battery pack (4). It is used for voltage conversion and power output via the synchronous step-up power switch (31). The charging management unit (3) works in narrow voltage DC NVDC mode and receives charging parameter settings from the main control unit (2).

2. The circuit for charging and powering using a TYPE-C interface according to claim 1, characterized in that: The data pins of the TYPE-C interface unit (6) are also connected to an ESD electrostatic protection device (71) and an electromagnetic interference suppression device (72).

3. The circuit for charging and powering using a TYPE-C interface according to claim 1, characterized in that: The charging management unit (3) uses the SYV976 chip.

4. The circuit for charging and powering using a TYPE-C interface according to claim 1, characterized in that: The protocol processing unit (1) adopts a PD protocol controller and integrates a full protocol stack of USB PD3.0, PPS and QC4.0+.

5. The circuit for charging and powering using a TYPE-C interface according to claim 1, characterized in that: The synchronous step-up power switch (31) uses the TDM3478 chip.

6. The circuit for charging and powering using a TYPE-C interface according to claim 4, characterized in that: The protocol processing unit (1) uses the CH224Q chip.

7. The circuit for charging and powering using a TYPE-C interface according to claim 2, characterized in that: The electromagnetic interference suppression device (72) uses a common-mode filter.

8. The circuit for charging and powering using a TYPE-C interface according to claim 2, characterized in that: The electrostatic discharge protection device (71) uses an SM712 diode.

9. The circuit for charging and powering via a TYPE-C interface according to claim 1, characterized in that: The battery pack (4) has a built-in BMS battery management module, which is used to provide the battery pack (4) with its own power and status information.

10. A portable electronic device, characterized in that: It includes a circuit that uses a TYPE-C interface for charging and power supply as described in any one of claims 1 to 9.

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