Multi-port charging circuit and electronic equipment accessory

Abstract

The utility model discloses a multi-port charging circuit and an electronic equipment accessory, the multi-port charging circuit comprises a control unit and at least three electric transmission interfaces, each electric transmission interface comprises a power supply transmission end and a configuration detection end, the power supply transmission end is connected with the power supply port of the control unit, and the configuration detection end is connected with the power supply port of the control unit. The configuration detection end is connected with a signal port of the control unit; wherein when the external equipment is connected to the electric transmission interface, the control unit is used for detecting an electric signal of the configuration detection end through the signal port so as to determine whether the external equipment is power supply equipment or power receiving equipment, and carrying out PD protocol communication with the power supply equipment or the power receiving equipment through the signal port; and the power port is used for performing electric transmission with the power transmission end based on a PD protocol, so that multi-path PD two-way transmission of the electronic equipment accessory is realized, and the use experience of a user can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mobile power supply technical field especially, relate to a multi -outlet charging circuit and electronic equipment accessories. BACKGROUND

[0002] In the traditional electronic equipment accessories, the electronic equipment accessories lack the identification ability to external equipment, and cannot automatically judge whether the connected equipment is a power supply equipment or a power receiving equipment, so the multiple interfaces of the electronic equipment accessories generally only support unidirectional current flow, for fixed power receiving or power output, and cannot perform bidirectional communication and bidirectional transmission based on the PD protocol with the external equipment at the same interface, which limits the ability of the electronic equipment accessories to charge multiple devices at the same time; and since some interfaces of the electronic equipment accessories do not support charging, it will lead the user to believe that there is a defect in the product without knowing, affecting the user's experience. SUMMARY

[0003] The utility model aims at least solve one of the technical problems existing in the prior art, and provide a multi -outlet charging circuit and electronic equipment accessories, which can realize multi -channel PD bidirectional transmission of the electronic equipment accessories.

[0004] In the first aspect, the utility model embodiment provides a multi -outlet charging circuit, which comprises a control unit and at least three electric transmission interfaces, a plurality of electric transmission interfaces all include power transmission end and configuration detection end, the power transmission end is connected with the power port of control unit, the configuration detection end is connected with the signal port of control unit;Wherein, when the external equipment is connected to the electric transmission interface, the control unit is used to detect the electric signal of the configuration detection end through the signal port to determine that the external equipment is a power supply equipment or a power receiving equipment, and carries out PD protocol communication with the power supply equipment or the power receiving equipment through the signal port;The power port is used for electric transmission with the power transmission end based on the PD protocol.

[0005] In some embodiments, the electric transmission interface is a Type-C interface or a Lightning interface, and the configuration detection end is a configuration channel pin of the Type-C interface or the Lightning interface.

[0006] In some embodiments, the electric transmission interface is further provided with a data positive end pin and a data negative end pin, and the data positive end pin and the data negative end pin are connected with the data transmission port of the control unit.

[0007] In some embodiments, the plurality of electrical transmission interfaces are three electrical transmission interfaces including a Type-C interface and / or a Lightning interface, at least one of the three electrical transmission interfaces is a reprogrammable interface, a data positive end pin of the reprogrammable interface is connected to a data positive end bus of the control unit through the data transmission port, and a data negative end pin of the reprogrammable interface is connected to a data negative end bus of the control unit through the data transmission port.

[0008] In some embodiments, the control unit is an MTP chip, and the MTP chip is provided with an electrically erasable programmable memory connected to the data positive end bus and the data negative end bus.

[0009] In some embodiments, the multi-port charging circuit further comprises a power supply module connected to the control unit, and the power supply module comprises a positive input end, a negative input end, and a battery protection chip connected in sequence, and the positive input end and the negative input end are used to connect the positive and negative poles of a battery.

[0010] In some embodiments, a switch module is arranged between the power supply transmission end and the power supply port, a control end of the switch module is connected to a control signal port of the control unit, and the switch module is used to connect the power supply transmission end and the power supply port when receiving the control signal of the control unit.

[0011] In some embodiments, the switch module comprises a MOS tube, a source of the MOS tube is connected to the power supply transmission end, a gate of the MOS tube is connected to the control signal port, and a drain of the MOS tube is connected to the power supply port. In some embodiments, the multi-port charging circuit further comprises an indicator light module connected to the control unit.

[0012] In the second aspect, the utility model embodiment provides a kind of electronic equipment accessories, including the multi-port charging circuit as described in any one of the first aspect.

[0013] According to the embodiment of the utility model provides a multi -port charging circuit and electronic equipment accessories, at least have following beneficial effect: the utility model embodiment's multi -port charging circuit, including control unit and at least three electric transmission interface, a plurality of electric transmission interface all include power transmission end and configuration detection end, power transmission end is connected with the power port of control unit, and configuration detection end is connected with the signal port of control unit;Among them, when external equipment connects to electric transmission interface, control unit is used to detect the electric signal of configuration detection end through signal port, and according to the resistance value corresponding to electric signal determines that external equipment is power supply equipment or power receiving equipment, and carries out PD protocol communication with power supply equipment or power receiving equipment through signal port;Power port is used to carry out electric transmission with power transmission end based on PD protocol, can make electronic equipment accessories realize the function of multi -way PD bidirectional transmission;It can be understood that, the control unit of the utility model can detect the resistance value of connected equipment, determine whether the equipment is power supply equipment or power receiving equipment, further, control unit carries out PD protocol communication with external equipment through signal port, carries out PD protocol handshake deception, to determine power configuration, and then can carry out electric transmission with power transmission end based on the above power configuration through power port, so that every interface can carry out power input or power output according to the type of connected equipment, to realize the multi -way PD bidirectional transmission of electronic equipment accessories;It is worth mentioning that, since the multiple interfaces in the application all support the bidirectional communication and input and output of PD protocol, when charging and discharging the electronic equipment accessories, the user is no longer limited to the function of a specific interface, and the use experience of the user can be effectively improved.

[0014] Other features and advantages of the present application will be set forth in the following description of the application, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the description and claims hereof as well as in the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and serve to explain the principles of the application, but do not limit the technical scheme of the application.

[0016] The application will be further described below with reference to the drawings and embodiments.

[0017] Figure 1 is a structure schematic view of a multi -port charging circuit provided by the embodiment of the utility model;

[0018] Figure 2 is another structure schematic view of a multi -port charging circuit provided by the embodiment of the utility model;

[0019] Figure 3 is a structure schematic view of the data transmission port in the multi-port charging circuit provided by the embodiment of the utility model;

[0020] Figure 4 is a structure schematic view of the memory in the multi-port charging circuit provided by the embodiment of the utility model;

[0021] Figure 5 is a structure schematic view of the control signal port in the multi-port charging circuit provided by the embodiment of the utility model;

[0022] Figure 6 is a structure schematic view of the power module and the indicator light module in the multi-port charging circuit provided by the embodiment of the utility model.

[0023] Reference signs:

[0024] 110, control unit; 121, first Type-C interface; 122, second Type-C interface; 123, third Type-C interface; 130, power module; 140, indicator light module. DETAILED DESCRIPTION

[0025] This part will describe the specific embodiments of the utility model in detail, the preferred embodiments of the utility model are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.

[0026] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number, "any one" means one or more, "at least one of the following" and similar expressions mean any combination of these items, including single or multiple items. If there is a description of the first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features.

[0027] It should be noted that the words such as setting, installing and connecting in the embodiments of the utility model should be understood in a broad sense, and the person skilled in the art can determine the specific meaning of the above words in the embodiments of the utility model in combination with the specific content of the technical scheme. For example, the term "connection" can be mechanical connection, electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium.

[0028] It should be explained that the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] Currently, in the traditional electronic device accessories, the electronic device accessories lack the identification ability to the external device, and cannot automatically judge whether the connected device is a power supply device or a power receiving device, so the multiple interfaces of the electronic device accessories generally only support unidirectional current flow, for fixed power receiving or power output, and cannot perform bidirectional communication and bidirectional transmission based on the PD protocol with the external device at the same interface, which limits the ability of the electronic device accessories to charge multiple devices at the same time; and since part of the interfaces of the electronic device accessories do not support charging, it will cause the user to believe that there is a defect in the product without knowing, affecting the user's experience.

[0030] Therefore, the utility model aims to at least solve one of the technical problems in the prior art, and provides a multi-port charging circuit and an electronic device accessory, which can realize multi-path PD bidirectional transmission of the electronic device accessory.

[0031] The embodiments of the present application will be further described below with reference to the drawings.

[0032] Reference Figure 1 , Figure 1 is a structural schematic diagram of a multi-port charging circuit provided by the utility model embodiment; in the first aspect, the utility model embodiment provides a multi-port charging circuit, which comprises a control unit 110 and at least three electric transmission interfaces, the multiple electric transmission interfaces each comprise a power transmission end and a configuration detection end, the power transmission end is connected with a power port of the control unit 110, and the configuration detection end is connected with a signal port of the control unit 110; wherein when an external device is connected to the electric transmission interface, the control unit 110 is used for detecting an electric signal of the configuration detection end through the signal port to determine that the external device is a power supply device or a power receiving device, and performs PD protocol communication with the power supply device or the power receiving device through the signal port; and the power port is used for performing electric transmission with the power transmission end based on the PD protocol.

[0033] In some embodiments, the electric transmission interface is a Type-C interface or a Lightning interface, and the configuration detection end is a configuration channel pin of the Type-C interface or the Lightning interface; in addition, the electric transmission interface is also provided with a data positive end pin and a data negative end pin, and the data positive end pin and the data negative end pin are connected with a data transmission port of the control unit.

[0034] In some embodiments, as Figure 1As shown, specifically, the plurality of electrical transmission interfaces in the application can include a first Type-C interface 121, a second Type-C interface 122, and a third Type-C interface 123, the first Type-C interface 121 includes a power transmission end VBUS1 and a configuration detection end CC1, the second Type-C interface 122 includes a power transmission end VBUS2 and a configuration detection end CC2, and the third Type-C interface 123 includes a power transmission end VBUS3 and a configuration detection end CC3; the CC1, CC2 and CC3 are respectively connected with the signal port of the control unit 110, and the VBUS1, VBUS2 and VBUS3 are respectively connected with the power port of the control unit 110.

[0035] It can be understood that the control unit 110 in the application can detect the resistance value of the connected device, determine whether the device is a power supply device or a power receiving device, further, the control unit 110 performs PD protocol communication with the external device through the signal port, performs PD protocol handshake deception, to determine the power supply configuration, and then can perform electrical transmission with the power transmission end based on the above power supply configuration through the power port, so that each interface can perform power input or power output according to the type of the connected device, thereby realizing multi-channel PD bidirectional transmission of electronic device accessories; it is worth mentioning that since the plurality of interfaces in the application support bidirectional communication and input and output of the PD protocol, when the user charges and discharges the electronic device accessories, the user is no longer limited to the function of a specific interface, and the use experience of the user can be effectively improved.

[0036] Among them, the control unit 110 includes an MCU control chip, the control unit 110 is used for receiving and sending PD protocol communication signals through the signal port, executing a step-up and step-down protocol, and performing power transmission through the power port, and the control unit 110 can integrate a PD protocol controller inside, which can identify and process PD protocol communication; each electrical transmission interface includes a power transmission end and a configuration detection end, the power transmission end is connected with the power port of the control unit 110 and is used for power transmission, and the configuration detection end is connected with the signal port of the control unit 110 and is used for detecting the type of the connected device; when the external device is connected to the electrical transmission interface, the control unit 110 first detects the resistance value of the connected device through the configuration detection end, according to the different resistance values, the control unit 110 can judge whether the connected device is a power supply device or a power receiving device, after determining the type of the device, the control unit 110 performs PD protocol communication with the external device through the signal port, performs PD protocol handshake deception, to determine the power supply configuration (voltage, current, etc.), based on the determined power supply configuration, the control unit 110 performs electrical transmission with the power transmission end through the power port, to realize the input or output of power.

[0037] In some embodiments, as Figure 1As shown, the present application can realize at least 3-way PD bidirectional transmission, each Type-C interface includes a power transmission end (VBUS1, VBUS2, VBUS3) and a configuration detection end (CC1, CC2, CC3). The power transmission end is connected with the power port of the control unit 110 for power transmission. The configuration detection end is connected with the signal port of the control unit 110 for detecting the type of the connected device (power supply device or powered device). It can be understood that the control unit 110 determines the power configuration through PD protocol communication, so that each interface supports the input and output of power, and the user can flexibly select the interface for charging and discharging operation according to the needs.

[0038] In some embodiments, the process of connecting the configuration detection end with the signal port of the control unit 110 for detecting the type of the connected device (power supply device or powered device) can include: in the initial state, each Type-C interface has a CC pin, and when there is no connected device, the CC pin is usually in a high resistance state; when an external device is connected to the Type-C interface, the control unit 110 first detects the state of the CC pin, and the connected device will pull the CC pin to different voltage levels according to its role (power supply device or powered device); the power supply device and the powered device will connect different resistance values on the CC pin, for example, the power supply device will pull the CC pin to the Vbus voltage of 5V, and change the pin voltage value through the pull-up resistor, and the powered device will usually pull the CC pin to the ground, and change the pin voltage value through the pull-down resistor; the control unit 110 judges the type of the connected device by detecting the voltage change on the CC pin, if the CC pin is pulled to the Vbus voltage, it means that the power supply device is connected, and if the CC pin is pulled to the ground, it means that the powered device is connected; further, after determining the type of the connected device, the control unit 110 can perform handshake communication with the connected device through the PD protocol, the PD protocol communication includes sending and receiving PD messages to determine the voltage, current and other parameters, according to the result of the PD protocol communication, the control unit 110 can determine the power configuration, for example, if the powered device is connected, the control unit 110 will select the appropriate voltage and current output according to the PD protocol, and if the power supply device is connected, the control unit 110 will select the appropriate voltage and current input according to the PD protocol; and then the power transmission end and the power port can be connected to start power transmission.

[0039] It can be understood that the present application can realize the input and output functions of multiple PDs through the PD handshake deception protocol, and the circuit architecture is simple, which can effectively optimize the product size.

[0040] Reference Figure 2 , Figure 2This is another structural schematic diagram of a multi-port charging circuit provided by an embodiment of the present invention; in some embodiments, the electrical transmission interface can be a Type-C interface, and the configuration detection terminal is a configuration channel pin of the Type-C interface, such as... Figure 2 As shown, in this application, multiple electrical transmission interfaces can each be equipped with two configuration detection terminals. For example, the first Type-C interface 121 includes a power transmission terminal VBUS1, a configuration channel pin CC11, and a configuration channel pin CC12; the second Type-C interface 122 includes a power transmission terminal VBUS2, a configuration channel pin CC21, and a configuration channel pin CC22; and the third Type-C interface 123 includes a power transmission terminal VBUS3, a configuration channel pin CC31, and a configuration channel pin CC32. CC11, CC12, CC21, CC22, CC31, and CC32 are respectively connected to the signal port of the control unit 110, and VBUS1, VBUS2, and VBUS3 are respectively connected to the power port of the control unit 110. The two configuration channel pins of each electrical transmission interface are used to perform handshake identification with the control module to determine whether the external device is a power supply device or a power receiving device, and to perform corresponding processing.

[0041] In some embodiments, VBUS1, VBUS2, and VBUS3 are respectively connected to the power ports of the control unit 110. These pins are used to transmit power. When a device is connected, power can be input or output through these pins. That is, the power supply device will provide power to the powered device through these pins, and the powered device will receive power through these pins. CC11, CC12, CC21, CC22, CC31, and CC32 are respectively connected to the signal ports of the control unit 110. These pins are used to identify the type of connected device and to perform PD protocol communication to determine the power configuration. Specifically, this may include: determining whether the connected device is a power supply device or a powered device by detecting voltage changes on the CC pin, and performing PD protocol communication through the CC pin to negotiate the power configuration. The control unit 110 performs handshake communication with the connected device through the CC pin to ensure the security and efficiency of power transmission.

[0042] refer to Figure 3 , Figure 3 This is a schematic diagram of a multi-port charging circuit according to an embodiment of the present invention, showing a data transmission port. In some embodiments, the electrical transmission interface is further provided with a positive data pin and a negative data pin, which are connected to the data transmission port of the control unit 110, such as... Figure 3As shown, the first Type-C interface 121 is further provided with a data positive end pin DPC1 and a data negative end pin DMC1, the second Type-C interface 122 is further provided with a data positive end pin DPC2 and a data negative end pin DMC2, the third Type-C interface 123 is further provided with a data positive end pin DPC3 and a data negative end pin DMC3, and the DPC1, the DMC1, the DPC2, the DMC2, the DPC3 and the DMC3 are respectively connected with the data transmission port of the control unit 110.

[0043] In some embodiments, the data positive end pin DPC1 of the first Type-C interface 121 is used for the positive pole of data transmission, the data negative end pin DMC1 is used for the negative pole of data transmission, the two pins are connected with the data transmission port of the control unit 110 to realize data transmission, the data positive end pin DPC2 of the second Type-C interface 122 is used for the positive pole of data transmission, the data negative end pin DMC2 is used for the negative pole of data transmission, the two pins are connected with the data transmission port of the control unit 110 to realize data transmission, and the data positive end pin DPC3 of the third Type-C interface 123 is used for the positive pole of data transmission, the data negative end pin DMC3 is used for the negative pole of data transmission, and the two pins are connected with the data transmission port of the control unit 110 to realize data transmission.

[0044] It can be understood that through the data positive end and data negative end pins, the Type-C interface can perform high-speed data transmission and support USB2.0, USB3.0 and other protocols, and the control unit 110 receives and sends data through the data transmission ports to realize communication between devices.

[0045] Reference Figure 4 , Figure 4 In some embodiments, the plurality of electrical transmission interfaces are three electrical transmission interfaces including a Type-C interface and / or a Lightning interface, and at least one of the three electrical transmission interfaces is a repeatable burning interface. Figure 4 As shown, the plurality of electrical transmission interfaces include a first Type-C interface 121, a second Type-C interface 122 and a third Type-C interface 123, at least one of the first Type-C interface 121, the second Type-C interface 122 and the third Type-C interface 123 is a repeatable burning interface, a data positive end pin of the repeatable burning interface is connected with a data positive end bus of the control unit 110 through a data transmission port, and a data negative end pin of the repeatable burning interface is connected with a data negative end bus of the control unit 110 through the data transmission port. Figure 4As shown, the third Type-C interface 123 is a reprogrammable interface. The positive data pin DPC3 and the negative data pin DMC3 of this reprogrammable interface are respectively connected to the positive data bus DPB and the negative data bus DMB of the control unit 110 through the data transmission port.

[0046] Among them, the third Type-C interface 123 serves as a reprogrammable interface. Its positive data pin DPC3 is connected to the positive data bus DPB of the control unit 110 through the data transmission port, and its negative data pin DMC3 is connected to the negative data bus DMB of the control unit 110 through the data transmission port. It can be understood that the reprogrammable interface is connected to the data bus of the control unit 110 through the data transmission port to realize fast data transmission and updates, enabling the control unit 110 to exchange data with the reprogrammable interface and supporting functions such as high-speed data transmission and firmware updates.

[0047] In some embodiments, the control unit 110 is an MTP chip, which includes an electrically erasable programmable memory (EEPROM) connected to a positive data bus and a negative data bus; wherein, as... Figure 4 As shown, the electrically erasable programmable memory is connected to the data transmission port via the data positive terminal bus DPB and the data negative terminal bus DMB.

[0048] Understandably, the MTP (Multi-Transaction Protocol) chip supports firmware updates, receiving new firmware code through the data transmission port and updating the contents of the memory, which supports repeated burning; the electrically erasable programmable memory (EEPROM) is a non-volatile memory set in the MTP chip. In the multi-port charging circuit, the main function of the EEPROM is to store key parameters and configuration information.

[0049] It is understood that in the embodiments of this application, the MTP chip is responsible for overall power management and data transmission control, ensuring the operation of the multi-port charging circuit, and works with the electrically erasable programmable memory (EEPROM) to store key configuration information and firmware code to support online upgrades of the power bank. This allows the application to be flexibly used to realize online repeated burning of finished products, which can shorten the development cycle by preparing materials in advance; at the same time, it avoids disassembly and rework, which would cause scrap and waste and losses to users.

[0050] In some embodiments, such as Figure 4As shown, the data positive end pin DPC3 and the data negative end pin DMC3 are connected with the data positive end bus DPB and the data negative end bus DMB of the control unit 110 through the data transmission port, when the firmware needs to be updated, the MTP chip receives the new firmware code through the data transmission port, the new firmware code is written into the electrically erasable programmable memory through the data positive end bus DPB and the data negative end bus DMB, after the update is completed, the MTP chip reads the new firmware code from the electrically erasable programmable memory and executes.

[0051] Reference Figure 5 , Figure 5 The control signal port is provided in a multi-port charging circuit, and a structural schematic diagram is provided; in some embodiments, a switch module is arranged between the power transmission end and the power port, a control end of the switch module is connected with the control signal port of the control unit 110, and the switch module is used for connecting the power transmission end and the power port when receiving the control signal of the control unit 110; in some embodiments, the switch module comprises a MOS tube, a source electrode of the MOS tube is connected with the power transmission end, a gate electrode is connected with the control signal port, and a drain electrode is connected with the power port.

[0052] As shown in the figure, Figure 5 As shown, the control signal port VOUT is connected with the power transmission end VBUS1 of the first Type-C interface 121 through the first MOS tube, the source electrode of the first MOS tube is connected with the power transmission end VBUS1, the gate electrode is connected with the control signal port VOUT, and the drain electrode is connected with VOUTC1 and VBUSC1 of the power port; the control signal port VOUT is connected with the power transmission end VBUS2 of the second Type-C interface 122 through the second MOS tube, the source electrode of the second MOS tube is connected with the power transmission end VBUS2, the gate electrode is connected with the control signal port VOUT, and the drain electrode is connected with VOUTC2 and VBUSC2 of the power port; the control signal port VOUT is connected with the power transmission end VBUS3 of the third Type-C interface 123 through the third MOS tube, the source electrode of the third MOS tube is connected with the power transmission end VBUS3, the gate electrode is connected with the control signal port VOUT, and the drain electrode is connected with VOUTC3 and VBUSC3 of the power port.

[0053] Among them, the VOUTC (Voltage Output Control) pin corresponding to each interface is used for controlling the voltage and current of the power supply, the VBUSC (Voltage Bus Control) pin corresponding to each interface corresponds to the voltage bus of the power transmission end, and the state of the MOS tube is controlled to connect VOUTC, VOUTC and the corresponding interface to determine the on-off of the power supply.

[0054] In some embodiments, the switch module includes a MOS tube (metal oxide semiconductor field effect transistor) for controlling the communication state between the power transmission end and the power port, the source of the MOS tube is connected with the power transmission end, the gate is connected with the control signal port, and the drain is connected with the power port; wherein, the switch module can determine whether the power flows from the power port to the load device by controlling the state of the MOS tube, when the control unit 110 issues a control signal, the switch module will open or close the MOS tube accordingly, thereby controlling the on-off of the power supply, in the multi-port charging circuit, the switch module can adjust the power supply configuration according to the needs of the connected device, for example, when a certain interface is connected with a device requiring high power, the switch module can adjust the corresponding power output.

[0055] Reference Figure 6 , Figure 6 is a structure schematic view of the multi-port charging circuit provided by the embodiment of the utility model; in some embodiments, the multi-port charging circuit further includes a power module 130, the power module 130 is connected with the control unit 110, and the power module 130 includes a positive input end, a negative input end and a battery protection chip connected in sequence, the positive input end and the negative input end are used for connecting the positive and negative poles of a battery, the battery protection chip is located between the two input ends and is used for managing power input and output, protecting the battery and feeding back the power state.

[0056] In some embodiments, the battery connected with the power module 130 can be a 4.2V ternary lithium battery or two parallel connected battery cells.

[0057] In some embodiments, the multi-port charging circuit further includes an indicator light module 140, the indicator light module 140 is connected with the control unit 110 and can be used for lighting or extinguishing the corresponding indicator light according to the signal issued by the control unit 110 to display the current working state.

[0058] In the second aspect, the utility model embodiment provides an electronic equipment accessory, including the multi-port charging circuit of any one in the first aspect, and the electronic equipment accessory can include a charger, a mobile power supply, a HUB, a car charger, a wireless charger and the like.

[0059] The embodiments of the utility model are described in detail above combined with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range of ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A multi-port charging circuit, comprising: The multi-port charging circuit comprises a control unit and at least three electrical transmission interfaces, each of the electrical transmission interfaces comprises a power transmission end and a configuration detection end, the power transmission end is connected with a power port of the control unit, and the configuration detection end is connected with a signal port of the control unit. When an external device is connected to the electrical transmission interface, the control unit is configured to detect an electrical signal of the configuration detection end through the signal port to determine whether the external device is a power supply device or a powered device, and perform PD protocol communication with the power supply device or the powered device through the signal port; and the power port is configured to perform electrical transmission with the power transmission end based on the PD protocol.

2. The multi-port charging circuit of claim 1, wherein, The electrical transmission interface is a Type-C interface or a Lightning interface, and the configuration detection end is a configuration channel pin of the Type-C interface or the Lightning interface.

3. The multi-port charging circuit of claim 2, wherein, The electrical transmission interface is further provided with a data positive end pin and a data negative end pin, and the data positive end pin and the data negative end pin are connected with a data transmission port of the control unit.

4. The multi-port charging circuit of claim 3, wherein, The three electrical transmission interfaces include a Type-C interface and / or a Lightning interface, and at least one of the three electrical transmission interfaces is a reprogrammable interface, the data positive end pin of the reprogrammable interface is connected with a data positive end bus of the control unit through the data transmission port, and the data negative end pin of the reprogrammable interface is connected with a data negative end bus of the control unit through the data transmission port.

5. The multi-port charging circuit of claim 4, wherein, The control unit is an MTP chip, and the MTP chip is provided with an electrically erasable programmable memory connected with the data positive end bus and the data negative end bus.

6. The multi-port charging circuit of claim 1, wherein, The multi-port charging circuit further comprises a power module connected with the control unit, the power module comprises a positive input end, a negative input end and a battery protection chip connected in sequence, and the positive input end and the negative input end are used for connecting positive and negative poles of a battery.

7. The multi-port charging circuit of claim 1, wherein, A switch module is arranged between the power transmission end and the power port, a control end of the switch module is connected with a control signal port of the control unit, and the switch module is used for connecting the power transmission end and the power port when receiving a control signal of the control unit.

8. The multi-port charging circuit of claim 7, wherein, The switch module comprises a MOS tube, a source of the MOS tube is connected with the power transmission end, a gate of the MOS tube is connected with the control signal port, and a drain of the MOS tube is connected with the power port.

9. The multi-port charging circuit of claim 1, wherein, The multi-port charging circuit further comprises an indicator light module connected with the control unit.

10. An electronic device accessory, characterized in that, The multi-port charging circuit comprises the multi-port charging circuit according to any one of claims 1 to 9.

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