CN116846006A - Dual Type-C interface quick charging device and method for mobile electronic equipment - Google Patents

Abstract

The application discloses a dual Type-C interface quick charging device and method for mobile electronic equipment, wherein the dual Type-C interface quick charging device comprises a Type-C interface, a PD protocol controller, a bidirectional buck-boost power conversion chip, a buck power conversion chip, a main controller and a battery pack, wherein the PD protocol controller judges the Type of external equipment and transmits information to the main controller through a serial bus protocol, the main controller performs power path management and controls the charging state according to the received information, and the PD protocol controller controls the connection and disconnection of a corresponding power path according to a power path management instruction sent by the main controller through the serial bus protocol. The device can support the dual-fast charging Type-C interface, and simultaneously the dual-Type-C interface also supports the external reverse charging function, and the application simplifies the circuit structure, reduces the number of chips, reduces the system cost, further optimizes the PCB layout, improves the device performance, simultaneously makes the device volume smaller, and is more convenient for popularization and application of products.

Description

Dual Type-C interface quick charging device and method for mobile electronic equipment

Technical Field

The application belongs to the technical field of Type-C interface quick charging, and particularly relates to a double Type-C interface quick charging device and method for mobile electronic equipment.

Background

The quick charging technology can charge the equipment in a short time, so that the charging time of a user is greatly saved, the use experience of the user is effectively improved, and the quick charging technology is rapidly developed along with the rapid popularization of the mobile equipment. The Type-C interface is one of the most popular interfaces at present, has the advantages of reversible plug, high-speed data transmission support, quick charge and the like, and is widely applied to devices such as notebook computers and the like.

In modern notebook computers, multiple external devices, such as an external display, a mouse, a keyboard, etc., are often required to be used simultaneously, and meanwhile, external devices, such as a smart phone, a tablet computer, etc., may need to be charged reversely, so that the design of the dual Type-C interface supporting the fast charging function can meet the above requirements, and therefore, the dual fast charging Type-C interface is becoming popular in mobile electronic devices such as modern notebook computers. The current dual Type-C interface fast charging scheme is that each Type-C interface is provided with a set of independent fast charging protocol chip and power conversion chip, and the fast charging function is completed by matching with A Processor (AP) or an Embedded Controller (EC), so that the overall cost is high, and the scheme is complex, so that the product popularization is influenced.

Disclosure of Invention

The application aims to provide a dual Type-C interface quick charging device and a dual Type-C interface quick charging method for mobile electronic equipment, which aim at the defects of the prior art, are ingenious and reasonable in design and high in practicability, the dual Type-C interface quick charging device can support the dual Type-C interface quick charging, meanwhile, the dual Type-C interface also supports the external reverse charging function, the circuit structure is simplified, the number of chips is reduced, the system cost is reduced, the PCB layout is further optimized, the device performance is improved, meanwhile, the device volume is smaller, and the popularization and the application of products are facilitated.

In order to solve the technical problems, the application adopts the following technical scheme:

a dual Type-C interface fast charging device for mobile electronic equipment comprises;

the Type-C interface is used for plugging between the external equipment and the quick charging device, realizing a charging function and data transmission, and comprises a Type-C interface I and a Type-C interface II;

the PD protocol controller is used for identifying the Type of the external equipment of the Type-C interface and managing a power path;

the bidirectional buck-boost power conversion chip is used for power conversion of quick charge and reverse quick charge;

the buck power supply conversion chip is used for providing fixed output voltage for external equipment;

a main controller for charge control and path management;

and a battery pack;

the PD protocol controller judges the type of the external device, transmits information to the main controller through the serial bus protocol, and the main controller performs power path management and controls the charging state according to the received information, and then controls the on and off of the corresponding power paths according to the power path management instructions sent by the main controller through the serial bus protocol.

Further, a MOS tube Q1 is arranged between the first Type-C interface and the buck power conversion chip, a MOS tube Q4 is arranged between the second Type-C interface and the buck power conversion chip, a PD protocol controller is connected with the gates of the MOS tube Q1 and the MOS tube Q4 through GPIO ports, and the PD protocol controller controls the on and off of the MOS tube Q1 and the MOS tube Q4 to realize the on and off of a power path between the Type-C interface and the buck power conversion chip. The PD protocol controller controls the on and off of the corresponding MOS tube to realize the on and off of the corresponding power supply channel. MOS pipe Q1 switches on, can realize the switching on of the power supply route between Type-C interface one and the buck power conversion chip, and MOS pipe Q4 switches on, can realize the switching on of the power supply route between Type-C interface two and the buck power conversion chip, and buck power conversion chip outputs stable 5v voltage all the time.

Further, a first MOS tube group is arranged between the first Type-C interface and the bidirectional buck-boost power supply conversion chip, the first MOS tube group comprises a MOS tube Q2 and a MOS tube Q3, a second MOS tube group is arranged between the second Type-C interface and the bidirectional buck-boost power supply conversion chip, the second MOS tube group comprises a MOS tube Q5 and a MOS tube Q6, the PD protocol controller is connected with the gates of the MOS tube Q2, the MOS tube Q3, the MOS tube Q5 and the MOS tube Q6 through GPIO ports, and the on and off of the MOS tube Q2, the MOS tube Q3, the MOS tube Q5 and the MOS tube Q6 are controlled through the PD protocol controller, so that the on and off of a power supply passage between the Type-C interface and the bidirectional buck-boost power supply conversion chip are realized, the design is reasonable, each MOS tube group comprises two MOS tubes, and the on and off of the corresponding power supply passage are realized through the synchronous on and off of the two MOS tubes, and the safety and reliability of the using process of the device are effectively improved.

The MOS tube is an N-channel or P-channel MOSFET, one end of the MOS tube group is connected with the Type-C interface, and the other end of the MOS tube group is connected with the bidirectional buck-boost power conversion chip, and the MOSFET cannot be completely turned off in two directions due to parasitic diodes, and the N-channel MOSFET is taken as an example: the MOS tube is an N-channel MOSFET, a parasitic diode exists between the Source (D) end and the Source (S) end, and even if the MOSFET is in a closed state, when the voltage of the Source end is higher than that of the Source end, the direction from the Source end to the Source end is still in a conducting state. Therefore, the MOS tube group adopts two MOS tubes which are connected back to back, so that bidirectional complete closing can be realized, the use safety performance is improved, and the occurrence of abnormality of a power supply passage is avoided.

Further, the input end of the bidirectional buck-boost power conversion chip is connected with the MOS tube Q3 and the MOS tube Q6, and the output end of the bidirectional buck-boost power conversion chip is connected with the battery pack.

Further, the input end of the buck power supply conversion chip is connected with the bidirectional buck-boost power supply conversion chip, the output end of the buck power supply conversion chip is connected with the MOS tube Q1 and the MOS tube Q4, and the output voltage of the buck power supply conversion chip is fixed 5V voltage.

Further, the PD protocol controller is connected with the CC pin of the Type-C interface I and the CC pin of the Type-C interface II respectively, and the PD protocol controller judges the access state and the Type of the external device through the CC pins.

The CC pin of the Type-C interface is a pin for identifying the role and direction of the connected device. There are two CC pins of each Type-C interface, CC1 and CC2, respectively, which can perform device identification and direction determination through alternate connection. The CC1 and CC2 pins may carry a variety of functions, such as for transmitting power information, for transmitting communication signals, for measuring voltage and current, and the like. In the plug process of the Type-C interface, the CC pins can be automatically configured according to the role and the direction of the connection equipment, so that quick charging and high-speed data transmission are realized.

For example, when the Type-C interface has Device access, the CC pin at the Device end may execute the following workflow:

the device can detect whether the connected cable supports the Type-C interface or not through the CC pin, a cable which does not accord with the Type-C interface cannot be inserted into the Type-C interface, and a cable which accords with the Type-C interface is inserted into the Type-C interface;

the device can detect whether the connected cable supports a quick charge protocol through the CC pin, wherein the quick charge protocol can be a USB PD (USB Power Delivery), and if the connected device supports the quick charge protocol, communication and configuration can be carried out according to the corresponding quick charge protocol; for example, the VBUS pin supply voltage can be increased from 5V to 9V/15V/20V, etc.; if the connected device does not support the fast charge protocol, the VBUS pin supply voltage remains 5V.

The device detects the role and the direction of the connected equipment through the CC pins to determine whether the equipment is Source or Sink;

the device configures its own CC pins according to the role and direction of the connection device, so as to achieve fast charging and high-speed data transmission.

Further, the serial bus protocol is an I2C bus or an SMBUS, and the I2C bus or the SMBUS are all serial bus protocols for connecting various devices in an electronic system. Both are simple protocols that require only two lines (data and clock lines) to communicate, typically for connecting sensors, LCD screens, data converters, and memory devices.

The quick charging method adopting the double Type-C interface quick charging device for the mobile electronic equipment comprises the following steps:

1) When the Type-C interface is accessed by the device, the PD protocol controller detects the role and the direction of the connected device, determines whether the device is an adapter or a device to be charged, and transmits information to the main controller through a serial bus protocol;

2) The PD protocol controller controls the on and off of the corresponding power supply path according to the power supply path management instruction sent by the main controller through the serial bus protocol.

Further, in the step 2), the PD protocol controller controls the on/off of the corresponding power path according to the power path management command sent by the main controller through the serial bus protocol, and the PD protocol controller includes the following three types:

(1) When the fact that the access device on the Type-C interface is an adapter is detected, after the PD protocol controller finishes device identification and direction judgment, the PD protocol controller controls the MOS tube group I or the MOS tube group II to be conducted, so that the adapter charges the battery pack through the bidirectional buck-boost power conversion chip;

(2) When the access equipment on the Type-C interface is detected to be equipment to be charged, after the PD protocol controller finishes equipment identification and direction judgment, the PD protocol controller controls the MOS pipe group I or the MOS pipe group II to be conducted, the bidirectional buck-boost power supply conversion chip works in a reverse buck-boost state, the battery pack is used as an input end of the bidirectional buck-boost power supply conversion chip, and power is supplied to the equipment to be charged through the bidirectional buck-boost power supply conversion chip;

(3) When detecting that one of the Type-C interfaces is connected with the adapter and the other of the Type-C interfaces is connected with the equipment to be charged, after the PD protocol controller completes equipment identification and direction judgment, the PD protocol controller controls the power supply channel between the Type-C interface connected with the equipment to be charged and the buck power supply conversion chip to be conducted, power is supplied to the equipment to be charged, and the power supply channel between the Type-C interface connected with the equipment to be charged and the bidirectional buck-boost power supply conversion chip is disconnected, and meanwhile the PD protocol controller controls the power supply channel between the Type-C interface connected with the adapter and the bidirectional buck-boost power supply conversion chip to be conducted.

Further, in the above step (3), the power supply to the device to be charged includes three types:

(1) when the input power of the adapter is larger than the output power of the equipment to be charged, after the adapter supplies power to the bidirectional buck-boost power supply conversion chip, the bidirectional buck-boost power supply conversion chip charges the battery pack, and simultaneously the bidirectional buck-boost power supply conversion chip supplies power to the buck power supply conversion chip, and then the buck power supply conversion chip supplies power to the equipment to be charged;

(2) when the input power of the adapter is smaller than the output power of the equipment to be powered, the adapter and the battery pack supply power to the bidirectional buck-boost power conversion chip at the same time, then the bidirectional buck-boost power conversion chip supplies power to the buck power conversion chip, and then the buck power conversion chip supplies power to the charging equipment;

(3) when the input power of the adapter is equal to the output power of the equipment to be powered, the adapter supplies power to the bidirectional buck-boost power conversion chip, the bidirectional buck-boost power conversion chip supplies power to the buck power conversion chip, and the buck power conversion chip supplies power to the charging equipment.

Due to the adoption of the technical scheme, the application has the following beneficial effects:

the dual-Type-C interface dual-voltage power supply device is ingenious and reasonable in design and high in practicality, the dual-Type-C interface dual-voltage power supply device can support dual-rapid charging Type-C interfaces, meanwhile, the dual-Type-C interface dual-voltage power supply device also supports an external reverse charging function, the circuit structure is simplified, the number of chips is reduced, the dual-Type-C interfaces share a set of bidirectional voltage-boosting and voltage-boosting power supply conversion chip and a PD protocol controller, the system cost is effectively reduced, the PCB layout is further optimized, the device performance is improved, meanwhile, the device size is smaller, popularization and application of products are facilitated, meanwhile, the safety performance of the device in use is good, the overall use stability and reliability are improved, and the user experience is better.

Drawings

The application is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic diagram of a dual Type-C interface fast charging device for mobile electronic devices according to the present application;

FIG. 2 shows the structure of a MOS transistor according to the present application;

fig. 3 is a schematic layout structure of two MOS transistors in the first MOS transistor set or the second MOS transistor set according to the present application.

In the figure: a 101-PD protocol controller; 102-a bidirectional buck-boost power conversion chip; 103-a buck power conversion chip; 104-a main controller; 105-Type-C interface one; 106-Type-C interface II; 107-battery pack; Q1-MOS tube Q1; Q2-MOS tube Q2; Q3-MOS tube Q3; Q4-MOS tube Q4; Q5-MOS transistor Q5; Q6-MOS transistor Q6.

Detailed Description

As shown in fig. 1 to 3, the dual Type-C interface fast charging device for mobile electronic equipment according to the present application includes: the Type-C interface is used for being inserted between the external equipment and the quick charging device, so that the charging function and data transmission are realized, and the Type-C interface comprises a Type-C interface I105 and a Type-C interface II 106; the PD protocol controller 101 is used for identifying the Type of the external equipment of the Type-C interface and managing a power path; a bidirectional buck-boost power conversion chip 102 for power conversion for fast charge and reverse fast charge; the buck power conversion chip 103 is used for providing fixed output voltage for external equipment; a main controller 104 for charging control and path management, the main controller 104 may be an embedded controller; and a battery pack 107, wherein the battery pack 107 is 1 or more lithium ion batteries or other types of rechargeable batteries, and the voltage of a single lithium ion battery is about 4.2V.

The PD protocol controller 101 determines the type of the external device, and transmits information to the main controller 104 through the serial bus protocol, the main controller 104 performs power path management and controls the charging state according to the received information, and the PD protocol controller 101 controls the on/off of the corresponding power path according to the power path management command sent by the main controller 104 through the serial bus protocol.

The bi-directional buck-boost power conversion chip 102 is a power management chip that integrates both the functions of step-up and step-down. Boost function: when the input voltage is lower than the output voltage, the internal circuit of the chip starts a boosting function, the input voltage is boosted to the output voltage, and the output voltage is controlled to be stabilized at a set value; blood pressure reducing function: when the input voltage is higher than the output voltage, the internal circuit of the chip starts a step-down function to reduce the input voltage to the output voltage, and simultaneously controls the output voltage to be stabilized at a set value.

Meanwhile, the bidirectional buck-boost power conversion chip 102 supports role conversion of an input end and an output end, namely the input end is changed into an output end, the output end is changed into an input end, and when the input and output roles are converted, the working principle is consistent with the above-described buck-boost principle;

and a MOS tube Q1 is arranged between the Type-C interface I105 and the buck power conversion chip 103, a MOS tube Q4 is arranged between the Type-C interface II 106 and the buck power conversion chip 103, the PD protocol controller 101 is connected with the gates of the MOS tube Q1 and the MOS tube Q4 through GPIO ports, and the PD protocol controller 101 controls the on and off of the MOS tube Q1 and the MOS tube Q4 to realize the on and off of a power supply passage between the Type-C interface and the buck power conversion chip 103. The PD protocol controller 101 controls the on and off of the corresponding MOS transistor to realize the on and off of the corresponding power supply path. MOS pipe Q1 switches on, can realize the switching on of the power supply route between Type-C interface one 105 and the buck power conversion chip 103, and MOS pipe Q4 switches on, can realize the switching on of the power supply route between Type-C interface two 106 and the buck power conversion chip 103, and buck power conversion chip 103 outputs stable 5v voltage all the time.

The Type-C interface I105 and the bidirectional buck-boost power conversion chip 102 between be equipped with MOS nest of tubes I, MOS nest of tubes I includes MOS pipe Q2 and MOS pipe Q3, be equipped with MOS nest of tubes II between Type-C interface II 106 and the bidirectional buck-boost power conversion chip 102, MOS nest of tubes II includes MOS pipe Q5 and MOS pipe Q6, PD protocol controller 101 passes through GPIO mouth and MOS pipe Q2, MOS pipe Q3, MOS pipe Q5, MOS pipe Q6 grid connection, pass through the switching on and switching off of PD protocol controller 101 control MOS pipe Q2, MOS pipe Q3, MOS pipe Q5, MOS pipe Q6, realize the switch-on and the switch-off of power supply passageway between Type-C interface and the bidirectional buck-boost power conversion chip 102, and reasonable in design, every group of MOS pipe all has contained two MOS pipes, synchronous switch-on and the switch-off through two MOS pipes, realize corresponding power supply passageway's switching on and switch-off, thereby effectively improve the security and the reliability of device use.

The MOS tube is an N-channel or P-channel MOSFET, one end of the MOS tube group is connected with the Type-C interface, and the other end of the MOS tube group is connected with the bidirectional buck-boost power conversion chip 102, and the MOSFET cannot be completely turned off in two directions due to parasitic diodes, and the N-channel MOSFET is taken as an example for illustration, as shown in an attached drawing 2 of the specification and an attached drawing 3 of the specification: the MOS tube is an N-channel MOSFET, a parasitic diode exists between the Source (D) end and the Source (S) end, and even if the MOSFET is in a closed state, when the voltage of the Source end is higher than that of the Source end, the direction from the Source end to the Source end is still in a conducting state. Therefore, the MOS tube group adopts two MOS tubes which are connected back to back, so that bidirectional complete closing can be realized, the use safety performance is improved, and the occurrence of abnormality of a power supply passage is avoided.

The input end of the bidirectional buck-boost power conversion chip 102 is connected with the MOS transistor Q3 and the MOS transistor Q6, and the output end of the bidirectional buck-boost power conversion chip 102 is connected with the battery pack 107. The battery pack 107 is 1 or more lithium ion batteries or other types of rechargeable batteries, and the voltage of a single lithium ion battery is about 4.2V. MOS pipe Q2 is connected with the VBUS pin of Type-C interface one 105, and MOS pipe Q5 is connected with the VBUS pin of Type-C interface two 106. When the Type-C interface is connected with the adapter, the adapter supplies power to the bidirectional buck-boost power supply conversion chip 102, the bidirectional buck-boost power supply conversion chip 102 charges the battery pack 107, and simultaneously supplies power to the buck power supply conversion chip 103, the input end of the buck power supply conversion chip 103 is connected with the bidirectional buck-boost power supply conversion chip 102, the output end of the buck power supply conversion chip 103 is connected with the MOS tube Q1 and the MOS tube Q4, and the output voltage of the buck power supply conversion chip 103 is fixed 5V voltage.

When the Type-C interface access device is an adapter, the bidirectional buck-boost power conversion chip 102 charges the battery pack 107 and also supplies power to the buck-boost power conversion chip 103. When the Type-C port has no device access or the accessed device needs the battery pack 107 to supply power to the outside, the battery pack 107 is responsible for supplying power to the buck power conversion chip 103.

The PD protocol controller 101 is respectively connected with a CC pin of the Type-C interface I105 and a CC pin of the Type-C interface II 106, and the PD protocol controller 101 judges the access state and the Type of the external device through the CC pins. The CC pin of the Type-C interface is a pin for identifying the role and direction of the connected device. There are two CC pins of each Type-C interface, CC1 and CC2, respectively, which can perform device identification and direction determination through alternate connection. The CC1 and CC2 pins may carry a variety of functions, such as for transmitting power information, for transmitting communication signals, for measuring voltage and current, and the like. In the plug process of the Type-C interface, the CC pins can be automatically configured according to the role and the direction of the connection equipment, so that quick charging and high-speed data transmission are realized.

For example, when the Type-C interface has Device access, the CC pin at the Device end may execute the following workflow:

the device can detect whether the connected cable supports the Type-C interface or not through the CC pin, a cable which does not accord with the Type-C interface cannot be inserted into the Type-C interface, and a cable which accords with the Type-C interface is inserted into the Type-C interface;

the device can detect whether the connected cable supports a quick charge protocol through the CC pin, wherein the quick charge protocol can be a USB PD (USB Power Delivery), and if the connected device supports the quick charge protocol, communication and configuration can be carried out according to the corresponding quick charge protocol; for example, the VBUS pin supply voltage can be increased from 5V to 9V/15V/20V, etc.; if the connected device does not support the fast charge protocol, the VBUS pin supply voltage remains 5V.

The serial bus protocol is an I2C bus or an SMBUS, and the I2C bus or the SMBUS are all serial bus protocols for connecting various devices in an electronic system. Both are simple protocols that require only two lines (data and clock lines) to communicate, typically for connecting sensors, LCD screens, data converters, and memory devices.

The quick charging method adopting the double Type-C interface quick charging device for the mobile electronic equipment comprises the following steps:

1) When the Type-C interface has a device access, the PD protocol controller 101 detects a role and a direction of connection to the device, determines whether the device is an adapter or a device to be charged, and transmits information to the main controller 104 through a serial bus protocol;

2) The main controller 104 performs power path management and controls the charging state according to the received information, and the PD protocol controller 101 controls the on/off of the corresponding power path according to the power path management command sent by the main controller 104 through the serial bus protocol, including the following three types:

(1) When the access device on the Type-C interface is detected to be an adapter, after the PD protocol controller 101 completes device identification and direction judgment, the PD protocol controller 101 controls the MOS tube group I or the MOS tube group II to be conducted, so that the adapter charges the battery pack 107 through the bidirectional buck-boost power conversion chip 102;

the adapter voltage is transferred from the Type-C interface to the bi-directional buck-boost power conversion chip 102, the bi-directional buck-boost power conversion chip 102 compares the adapter voltage with the battery pack 107 voltage, and if the adapter voltage is higher than the battery pack 107 voltage, the bi-directional buck-boost power conversion chip 102 operates in buck mode (buck mode), for example, when the adapter voltage is 9V and the battery pack 107 voltage is 4V, the bi-directional buck-boost power conversion chip 102 operates in buck mode; if the adapter voltage is lower than the battery pack 107 voltage, the bi-directional buck-boost power conversion chip 102 operates in the boost mode (boost mode), for example, when the adapter voltage is 5V and the battery pack 107 voltage is 8V, the bi-directional buck-boost power conversion chip 102 operates in the boost mode.

(2) When the access device on the Type-C interface is detected to be the device to be charged, after the PD protocol controller 101 completes device identification and direction judgment, the PD protocol controller 101 controls the MOS tube group I or the MOS tube group II to be conducted, the bidirectional buck-boost power supply conversion chip 102 works in a reverse buck-boost state, the battery pack 107 serves as an input end of the bidirectional buck-boost power supply conversion chip 102, and power is supplied to the device to be charged through the bidirectional buck-boost power supply conversion chip 102;

the voltage required by the equipment to be charged is transmitted to the bidirectional buck-boost power conversion chip 102 from the Type-C interface, the bidirectional buck-boost power conversion chip 102 compares the voltage required by the equipment to be charged with the voltage of the battery pack 107, if the voltage required by the equipment to be charged is lower than the voltage of the battery pack 107, the bidirectional buck-boost power conversion chip 102 works in a reverse buck mode (buck mode), for example, when the equipment to be charged needs 5V power supply and the voltage of the battery pack 107 is 8V, the buck-boost chip 102 works in the buck mode; if the voltage required by the device to be charged is higher than the voltage of the battery pack 107, the bi-directional buck-boost power conversion chip 102 operates in a reverse boost mode (boost mode), for example, when the device to be charged requires 15V power, and the battery pack 107 operates in a boost mode at 8V.

(3) When detecting that one of the Type-C interfaces is connected to the adapter and the other is connected to the device to be charged, after the PD protocol controller 101 completes equipment identification and direction judgment, the PD protocol controller 101 controls the power supply channel between the Type-C interface connected to the device to be charged and the buck power supply conversion chip 103 to be conducted, power is supplied to the device to be charged, the output voltage of the buck power supply conversion chip 103 is fixed 5V, and the power supply channel between the Type-C interface connected to the device to be charged and the bidirectional buck-boost power supply conversion chip 102 is disconnected, so that the abnormality of the power supply channel is avoided, and meanwhile, the PD protocol controller 101 controls the power supply channel between the Type-C interface connected to the adapter and the bidirectional buck-boost power supply conversion chip 102 to be conducted;

when one access adapter and the other access to the equipment to be charged on the Type-C interface are detected, the power supply for the equipment to be charged comprises the following three types:

(1) when the input power of the adapter is larger than the output power of the equipment to be charged, after the adapter supplies power to the bidirectional buck-boost power conversion chip 102, the bidirectional buck-boost power conversion chip 102 charges the battery pack 107, and meanwhile, the bidirectional buck-boost power conversion chip 102 also supplies power to the buck power conversion chip 103, and then the buck power conversion chip 103 supplies power to the equipment to be charged;

for example: if the maximum power of the accessed adapter is 18W (9v@2a), the power required by the device to be powered is 5W (5v@1a), in which case the adapter can supply power to the battery pack 107 and the device to be charged simultaneously, and if the battery pack 107 has completed charging, the adapter only supplies power of 5W to the device to be powered.

(2) When the input power of the adapter is smaller than the output power of the equipment to be powered, the adapter and the battery pack 107 supply power to the bidirectional buck-boost power conversion chip 102 at the same time, then the bidirectional buck-boost power conversion chip 102 supplies power to the buck power conversion chip 103, and then the buck power conversion chip 103 supplies power to the charging equipment;

for example: if the maximum power of the accessed adapter is 5W (5 v@1a), the power required by the device to be powered is 10W (5 v@2a), in which case the adapter can only provide a maximum of 5W power, and the battery pack 107 and the adapter can simultaneously provide 5W power to the device to be powered.

(3) When the input power of the adapter is equal to the output power of the equipment to be powered, the adapter supplies power to the bidirectional buck-boost power conversion chip 102, the bidirectional buck-boost power conversion chip 102 supplies power to the buck power conversion chip 103, and the buck power conversion chip 103 supplies power to the charging equipment.

The application has the advantages of ingenious and reasonable design and strong practicability, the device can support the dual-fast charging Type-C interface, simultaneously the dual-Type-C interface also supports the external reverse charging function, the application simplifies the circuit structure, reduces the number of chips, and the dual-Type-C interface shares a set of bidirectional buck-boost power supply conversion chip 102 and PD protocol controller 101, thereby effectively reducing the system cost, further optimizing the PCB layout, improving the device performance, simultaneously ensuring smaller device volume, being more convenient for popularization and application of products, simultaneously ensuring good safety performance when the device is used, improving the overall use stability and reliability, and ensuring better user experience.

The above is only a specific embodiment of the present application, but the technical features of the present application are not limited thereto. Any simple changes, equivalent substitutions or modifications made on the basis of the present application to achieve substantially the same technical effects are included in the scope of the present application.

Claims (10)

1. Two Type-C interface fast-charging devices to mobile electronic device, characterized by includes:

the Type-C interface is used for plug connection between the external equipment and the quick charging device, has a charging function and data transmission, and comprises a Type-C interface I and a Type-C interface II;

the PD protocol controller is used for identifying the Type of the Type-C interface external equipment and managing a power path;

the bidirectional buck-boost power conversion chip is used for power conversion of quick charge and reverse quick charge;

the buck power supply conversion chip is used for providing fixed output voltage for external equipment;

a main controller for charge control and path management;

and a battery pack;

the PD protocol controller judges the type of the external equipment, transmits information to the main controller through a serial bus protocol, the main controller performs power path management and controls the charging state according to the received information, and then controls the on and off of a corresponding power path according to a power path management instruction sent by the main controller through the serial bus protocol.

2. The dual Type-C interface fast charging device for a mobile electronic device of claim 1, wherein: the Type-C interface I with be equipped with MOS pipe Q1 between the step-down power conversion chip, type-C interface II with be equipped with MOS pipe Q4 between the step-down power conversion chip, PD protocol controller pass through the GPIO mouth with MOS pipe Q1 MOS pipe Q4 grid is connected, PD protocol controller control MOS pipe Q1 MOS pipe Q4 switch on and switch off, realize the Type-C interface with switch on and switch off of the power supply passageway between the step-down power conversion chip.

3. The dual Type-C interface fast charging device for a mobile electronic device of claim 1, wherein: the Type-C interface I with be equipped with MOS nest of tubes one between the two-way buck-boost power conversion chip, MOS nest of tubes one includes MOS pipe Q2 and MOS pipe Q3, type-C interface II with be equipped with MOS nest of tubes two between the two-way buck-boost power conversion chip, MOS nest of tubes II includes MOS pipe Q5 and MOS pipe Q6, PD protocol controller pass through the GPIO mouth with MOS pipe Q2 MOS pipe Q3 MOS pipe Q5 MOS pipe Q6 grid connection, through PD protocol controller control MOS pipe Q2 MOS pipe Q3 MOS pipe Q5 MOS pipe Q6's switch on and switch-off, realization Type-C interface with switch-on and switch-off of the power supply passageway between the two-way buck-boost power conversion chip.

4. The dual Type-C interface fast charging device for a mobile electronic device of claim 3, wherein: the input end of the bidirectional buck-boost power conversion chip is connected with the MOS tube Q3 and the MOS tube Q6, the output end of the bidirectional buck-boost power conversion chip is connected with the battery pack, the MOS tube Q2 is connected with the VBUS pin of the Type-C interface I, and the MOS tube Q5 is connected with the VBUS pin of the Type-C interface II.

5. The dual Type-C interface fast charging device for a mobile electronic device of claim 2, wherein: the input end of the buck power supply conversion chip is connected with the bidirectional buck-boost power supply conversion chip, the output end of the buck power supply conversion chip is connected with the MOS tube Q1 and the MOS tube Q4, and the output voltage of the buck power supply conversion chip is fixed 5V voltage.

6. The dual Type-C interface fast charging device for a mobile electronic device of claim 1, wherein: the PD protocol controller is respectively connected with the CC pin of the Type-C interface I and the CC pin of the Type-C interface II, and the PD protocol controller judges the access state and the Type of the external device through the CC pin.

7. The dual Type-C interface fast charging device for a mobile electronic device of claim 1, wherein: the serial bus protocol is an I2C bus or an SMBUS.

8. The quick charging method for the dual Type-C interface quick charging device of the mobile electronic device according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:

1) When the Type-C interface is accessed by the device, the PD protocol controller detects the role and the direction of the connected device, determines whether the device is an adapter or a device to be charged, and transmits information to the main controller through a serial bus protocol;

2) The PD protocol controller controls the on and off of the corresponding power supply path according to the power supply path management instruction sent by the main controller through the serial bus protocol.

9. The quick charging method of the dual Type-C interface quick charging device for a mobile electronic device according to claim 8, wherein the method comprises the following steps: in the step 2), the PD protocol controller controls the on/off of the corresponding power path according to the power path management command sent by the main controller through the serial bus protocol, and the PD protocol controller includes the following three types:

(1) When the access equipment on the Type-C interface is an adapter, after equipment identification and direction judgment are completed, the PD protocol controller controls the MOS tube group I or the MOS tube group II to be conducted, so that the adapter charges the battery pack through the bidirectional buck-boost power conversion chip;

(2) When the access equipment on the Type-C interface is equipment to be charged, after the PD protocol controller finishes equipment identification and direction judgment, the PD protocol controller controls the MOS pipe group I or the MOS pipe group II to be conducted, the bidirectional buck-boost power conversion chip works in a reverse buck-boost state, the battery pack is used as an input end of the bidirectional buck-boost power conversion chip, and power is supplied to the equipment to be charged through the bidirectional buck-boost power conversion chip;

(3) When one of the Type-C interfaces is connected with the adapter and the other is connected with the equipment to be charged, after the PD protocol controller completes equipment identification and direction judgment, the PD protocol controller controls the power supply channel between the Type-C interface connected with the equipment to be charged and the buck power supply conversion chip to be conducted, power is supplied to the equipment to be charged, and the power supply channel between the Type-C interface connected with the equipment to be charged and the bidirectional buck-boost power supply conversion chip is disconnected, and meanwhile, the PD protocol controller controls the power supply channel between the Type-C interface connected with the adapter and the bidirectional buck-boost power supply conversion chip to be conducted.

10. The quick charging method for the dual Type-C interface quick charging device of the mobile electronic device according to claim 9, wherein the method comprises the following steps: in the above step (3), the power supply to the device to be charged includes three types:

(1) when the input power of the adapter is larger than the output power of the equipment to be charged, after the adapter supplies power to the bidirectional buck-boost power supply conversion chip, the bidirectional buck-boost power supply conversion chip charges the battery pack, and simultaneously the bidirectional buck-boost power supply conversion chip supplies power to the buck power supply conversion chip, and then the buck power supply conversion chip supplies power to the equipment to be charged;

(2) when the input power of the adapter is smaller than the output power of the equipment to be powered, the adapter and the battery pack supply power to the bidirectional buck-boost power conversion chip at the same time, then the bidirectional buck-boost power conversion chip supplies power to the buck power conversion chip, and then the buck power conversion chip supplies power to the charging equipment;

(3) when the input power of the adapter is equal to the output power of the equipment to be powered, the adapter supplies power to the bidirectional buck-boost power conversion chip, the bidirectional buck-boost power conversion chip supplies power to the buck power conversion chip, and the buck power conversion chip supplies power to the charging equipment.