CN114709906A

CN114709906A - Charging circuit based on multiple protocols and application method thereof

Info

Publication number: CN114709906A
Application number: CN202210558796.7A
Authority: CN
Inventors: 张钰玫; 钟昌斈; 钟昌佑
Original assignee: Beijing Shichangding Technology Co ltd
Current assignee: Beijing Shichangding Technology Co ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-07-05

Abstract

The invention provides a charging circuit based on multiple protocols and an application method thereof, relates to the technical field of quick charging circuits, and solves the technical problem that in the prior art, the production cost of two-port multi-protocol charging equipment is high. The charging circuit includes: the device comprises a sampling module, a feedback module, a PFC control module, a control logic module, a protocol module and a driving module; the sampling module acquires a sampling signal from an external circuit and sends the sampling signal to the control logic module; the protocol module detects protocol information of a load of the charging circuit and sends the protocol information to the control logic module; the control logic module generates a first control signal and a second control signal based on the sampling signal and the protocol information; the feedback module acquires a first control signal and controls an optical coupling switch in an external circuit; the PFC control module acquires a second control signal and controls an MOS switch in an external circuit; the driving module converts the electric energy provided by the external circuit into output electric energy and outputs the output electric energy.

Description

Charging circuit based on multiple protocols and application method thereof

Technical Field

The application relates to the technical field of quick charging circuits, in particular to a charging circuit based on multiple protocols and an application method thereof.

Background

The conventional charging mode is that the charging equipment is matched with the mobile equipment through a quick charging protocol, so that the mobile equipment is quickly charged. And the mobile equipment of each manufacturer has an independent quick charging protocol, so that charging of different mobile equipment can be completed only by tightly combining the charging equipment manufacturer with each mobile equipment manufacturer. For example, a two port multi-protocol charging device is needed to charge two different mobile devices simultaneously.

However, the prior art has the technical problem that the production cost of the two-port multi-protocol charging device is high.

Disclosure of Invention

The present application aims to provide a charging circuit based on multiple protocols and an application method thereof, so as to alleviate the technical problem in the prior art that the production cost of two-port multiple protocol charging equipment is high.

In a first aspect, an embodiment of the present application provides a charging circuit based on multiple protocols, where the charging circuit is connected to an external circuit; the charging circuit includes:

the device comprises a sampling module, a feedback module, a Power Factor Correction (PFC) control module, a control logic module, a protocol module and a driving module;

the control logic module is respectively connected with the sampling module, the feedback module, the PFC control module, the protocol module and the driving module;

the sampling module is used for acquiring a sampling signal from the external circuit and sending the sampling signal to the control logic module;

the protocol module is used for detecting protocol information of the load of the charging circuit and sending the protocol information to the control logic module;

the control logic module is used for generating a first control signal and a second control signal based on the sampling signal and the protocol information, sending the first control signal to the feedback module and sending the second control signal to the PFC control module;

the feedback module is used for acquiring the first control signal from the control logic module and controlling an optical coupling switch in the external circuit based on the first control signal;

the PFC control module is used for acquiring the second control signal from the control logic module and controlling a Metal-Oxide-Semiconductor Field-Effect Transistor (MOS) switch in the external circuit based on the second control signal;

the driving module is used for converting the electric energy provided by the external circuit into output electric energy and outputting the output electric energy to the load;

the charging circuit dynamically distributes the output electric energy based on the load and the electric energy provided by the external circuit.

In one possible implementation, the sampling module includes:

a data selector (MUX) unit, a Successive Approximation Analog-to-Digital Converter (sar adc) unit, and a Digital filtering calibration module;

the input end of the MUX unit is connected with the external circuit, and the output end of the MUX unit is connected with the input end of the SARADC unit; the output end of the SARADC unit is connected with the input end of the digital filtering calibration module; and the output end of the digital filtering calibration module is connected with the control logic module.

In one possible implementation, the feedback module includes:

a digital-to-analog Converter (DAC) unit and a first Pulse Width Modulation (PWM) controller;

the input end of the DAC unit is connected with the control logic module, and the output end of the DAC unit is connected with the optocoupler switch; the input end of the first PWM controller is connected with the control logic module, and the output end of the first PWM controller is connected with the optocoupler switch.

In one possible implementation, the driving module includes:

the device comprises a first level conversion unit, a second level conversion unit, a third level conversion unit, a bootstrap voltage detection unit, a high-voltage side driving unit and a low-voltage side driving unit;

the input end of the first level conversion unit is connected with the control logic module, and the output end of the first level conversion unit is connected with the second level conversion unit; a first output end of the second level conversion unit is connected with an input end of the bootstrap voltage detection unit; a second output end of the second level shifter is connected with an input end of the high-voltage side driving unit; a third output end of the second level shift is connected with an output end of the bootstrap voltage detection unit and an output end of the high-voltage side driving unit; the input end of the third level conversion unit is connected with the control logic module, and the output end of the third level conversion unit is respectively connected with the first input end of the low-voltage side driving unit and the input end of the voltage detection unit; and the output end of the voltage detection unit is connected with the second input end of the low-voltage side driving unit.

In one possible implementation, the control logic module includes:

an Arithmetic and Logic Unit (ALU), a Multiply and Add Unit (MAU) Unit, an interface Logic Unit, a memory Unit, a process scheduler, a timer, a memory controller, a gate, and an analog calibration circuit;

the ALU unit, the MAU unit, the interface logic unit, the memory unit, the process scheduler, the timer, the memory controller, the door watch gate, and the analog calibration circuitry are integrated into the control logic module.

In one possible implementation, the protocol module includes:

configuring a channel (CC) controller and a (DataPlus/DataMinus, DP/DM) circuit module;

the CC controller and the DP/DM circuit module are respectively connected with the control logic module.

In one possible implementation, the PFC control module includes:

a second PWM controller;

and the input end of the second PWM controller is connected with the control logic module, and the output end of the second PWM controller is connected with the MOS switch.

In a second aspect, an embodiment of the present application provides an application method of a charging circuit based on multiple protocols, which is applied to the charging circuit according to the first aspect; the charging circuit is connected with an external circuit; the charging circuit comprises a sampling module, a feedback module, a PFC control module, a control logic module, a protocol module and a driving module; the control logic module is respectively connected with the sampling module, the feedback module, the PFC control module, the protocol module and the driving module; the method comprises the following steps:

acquiring a sampling signal from the external circuit through the sampling module, and sending the sampling signal to the control logic module;

detecting protocol information of a load of the charging circuit through the protocol module, and sending the protocol information to the control logic module;

generating a first control signal and a second control signal based on the sampling signal and the protocol information through the control logic module, sending the first control signal to the feedback module, and sending the second control signal to the PFC control module;

acquiring the first control signal from the control logic module through the feedback module, and controlling an optical coupling switch in the external circuit based on the first control signal;

acquiring the second control signal from the control logic module through the PFC control module, and controlling an MOS switch in the external circuit based on the second control signal;

converting the electric energy provided by the external circuit into output electric energy through the driving module and outputting the output electric energy to the load;

and dynamically distributing the output electric energy based on the load and the electric energy provided by the external circuit.

In a third aspect, an embodiment of the present application provides a dual-port multi-protocol fast charging circuit, including an external circuit, a first Universal Serial Bus (USB) interface, a second USB interface, and the multi-protocol based charging circuit according to the first aspect; the charging circuit based on the multi-protocol comprises a sampling module, a feedback module, a PFC control module, a control logic module, a protocol module and a driving module;

the external circuit comprises an alternating current power supply, a rectifier bridge, a transformer, a first MOS switch, a second MOS switch, an alternating current PWM controller, a diode, an inductor, a first polarity capacitor, a second polarity capacitor, a non-polarity capacitor, a first resistor, a second resistor and an optical coupling switch, wherein the transformer comprises a first coil, a second coil and a third coil;

the positive electrode and the negative electrode of the alternating current power supply are respectively connected with the first pin and the second pin of the rectifier bridge; the third pin of the rectifier bridge is respectively connected with the first pin of the first coil and the first pin of the alternating current PWM controller, the second pin of the first coil is connected with the source electrode of the first MOS switch, the grid electrode of the first MOS switch is connected with the second pin of the alternating current PWM controller, a third pin of the alternating current PWM controller is respectively connected with a fourth pin of the rectifier bridge, a drain electrode of the first MOS switch and a negative electrode of the first polarity capacitor, a fourth pin of the alternating current PWM controller is connected with a first pin of the optical coupling switch, the anode of the first polarity capacitor is respectively connected with the cathode of the diode and a second pin of the optical coupling switch, a first pin of the second coil is connected with an anode of the diode, and a second pin of the second coil is connected with a cathode of the first polarity capacitor;

the driving module is respectively connected with a first pin of the inductor, a source electrode of the second MOS switch, an anode of the second polar capacitor and a first pin of the first resistor, the feedback module is respectively connected with a second pin of the first resistor, a first pin of the second resistor and a first pin of the nonpolar capacitor, a second pin of the nonpolar capacitor is connected with a third pin of the optocoupler switch, the PFC control module is connected with a grid electrode of the second MOS switch, the sampling module is respectively connected with a second pin of the second resistor, a negative electrode of the second polar capacitor, a drain electrode of the second MOS switch and a first pin of the third coil, and a second pin of the inductor is respectively connected with a second pin of the third coil and a fourth pin of the optocoupler switch;

the protocol module is respectively connected with the first USB interface and the second USB interface.

In a fourth aspect, an embodiment of the present application provides a dual-port multi-protocol fast charging circuit, which includes an external circuit, a first USB interface, a second USB interface, and the multi-protocol-based charging circuit according to the first aspect; the charging circuit based on the multi-protocol comprises a sampling module, a feedback module, a PFC control module, a control logic module, a protocol module and a driving module;

the driving module is respectively connected with the first pin of the inductor, the source of the second MOS switch, the anode of the second polarity capacitor, the first pin of the first resistor and the first USB interface, the feedback module is respectively connected with the second pin of the first resistor, the first pin of the second resistor and the first pin of the nonpolar capacitor, a second pin of the non-polar capacitor is connected with a third pin of the optical coupling switch, the PFC control module is connected with a grid electrode of the second MOS switch, the sampling module is respectively connected with the second pin of the second resistor, the cathode of the second polar capacitor, the drain of the second MOS switch and the first pin of the third coil, a second pin of the inductor is respectively connected with a second pin of the third coil and a fourth pin of the optocoupler switch;

the protocol module is connected with the second USB interface.

The embodiment of the application brings the following beneficial effects:

the embodiment of the application provides a charging circuit based on multiple protocols and an application method thereof, wherein the charging circuit is connected with an external circuit; the charging circuit includes: the device comprises a sampling module, a feedback module, a PFC control module, a control logic module, a protocol module and a driving module; the control logic module is respectively connected with the sampling module, the feedback module, the PFC control module, the protocol module and the driving module; the sampling module is used for acquiring a sampling signal from an external circuit and sending the sampling signal to the control logic module; the protocol module is used for detecting the protocol information of the load of the charging circuit and sending the protocol information to the control logic module; the control logic module is used for generating a first control signal and a second control signal based on the sampling signal and the protocol information, sending the first control signal to the feedback module and sending the second control signal to the PFC control module; the feedback module is used for acquiring a first control signal from the control logic module and controlling an optical coupling switch in the external circuit based on the first control signal; the PFC control module is used for acquiring a second control signal from the control logic module and controlling an MOS switch in the external circuit based on the second control signal; the driving module is used for converting the electric energy provided by the external circuit into output electric energy and outputting the output electric energy to a load. Compared with the prior art, the charging circuit based on the multi-protocol and the application method thereof can save the voltage stabilizing diode, save the power correcting circuit chip, output two independent PD quick charging voltages simultaneously, and dynamically distribute the two independent output powers, so that the charging equipment can provide a multi-port independent quick charging function at a lower production cost, and the technical problem of higher production cost of two-port multi-protocol charging equipment in the prior art is solved. The circuit can be applied to adapters, power strips, mobile power supplies and other scenes.

Drawings

In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic circuit diagram of a conventional adapter according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of a charging circuit based on multiple protocols according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a sampling module according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a feedback module according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a driving module according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a control logic module according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a protocol module according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a PFC module according to an embodiment of the present disclosure;

fig. 9 is a schematic flowchart illustrating an application method of a charging circuit based on multiple protocols according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a dual-port multi-protocol fast charging circuit according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of another dual-port multi-protocol fast charging circuit according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "comprising" and "having," and any variations thereof, as referred to in the embodiments of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

With the wider application range of the mobile device, the requirement for the lightness and thinness of the mobile device is higher, which also limits the energy storage capacity and the manner of the device not to be changed much, so that the user needs to carry the mobile power supply for emergency when using the mobile device, and accordingly, the mobile power supply industry is a time-based or rental type. The embodiment of the application realizes that a user can more quickly enable the electric quantity of the mobile equipment to reach the state of outdoor work when using the mobile equipment from another angle, and can provide quick charging for different equipment at the same time. The conventional charging structure is shown in fig. 1, and is configured to convert an Alternating Current (AC) to a Direct Current (DC) side, and adjust an output voltage of a primary side at a secondary side DC end through an optical coupler to meet a charging requirement, but each mobile device has its own fast charging protocol, so that a conventional manner needs to be closely combined with another industry (AC-DC and DC-DC manufacturers) to complete charging of different mobile devices. If the existing secondary voltage reduction mode is adopted to support Power supply (PD) fast charging of two ports, two sets of DC-DC and fast charging protocol modules are needed, the generation cost of the mode is high, the occupied area of a Printed Circuit Board (PCB) is large, the product yield is low, and the like, most importantly, a Microcontroller (MCU) chip is needed to manage the communication and Power adjustment between different modules in the management of the total output Power and the output Power of each USB port, and the risk of timeliness, real-time performance and safety exists between two modules controlled by a feedback loop. Therefore, the prior art has the technical problem that the production cost of the two-port multi-protocol charging device is high.

Based on this, the embodiment of the application provides a charging circuit based on multiple protocols and an application method thereof, and the adopted mode is a solution scheme that a protocol, a digital DCDC and a digital circuit are controlled and integrated on one chip, so that a quick charging mode of two independent ports and multiple protocols can be realized. Primary voltage reduction and secondary voltage reduction can be realized simultaneously under the same application circuit, only software needs to be changed, hardware design does not need to be changed, and an actual system manufacturer can determine which mode to use for charging the mobile equipment; meanwhile, the total management output power and the output power between the two ports can be dynamically adjusted in the same chip, so that the timeliness, the real-time performance and the safety are safer than those of the secondary voltage reduction mode of the conventional multi-chip. The technical problem that the production cost of two-port multi-protocol charging equipment is high in the prior art can be solved.

The charging circuit based on multiple protocols and the application method thereof provided by the embodiment of the application can be applied to, but are not limited to, the following scenes: can be applied to adapter application scenarios; the method can be applied to a socket application scene; the method can be applied to energy storage application scenes; the method can be applied to an AC-DC primary voltage reduction application scene; the method can be applied to an AC-DC secondary voltage reduction application scene; the power device structure supports one full bridge and two half bridge outputs; the quick charging of two independent PD2.0/PD3.0/PD3.1 ports at the same time is supported; the quick charge of two independent ports QC2.0/QC3.0/QC4.0/QC5.0 is supported; the method supports the quick charging of two independent FCP/SCP/SSCP at the same time; and the simultaneous two-port independent fusion quick charging is supported. The charging circuit based on multiple protocols and the application method thereof provided by the embodiment of the application include, but are not limited to, the following functions: the total power output can be dynamically managed to meet the preset output power; the power output and the total power output of the two ports can be well managed to accord with the originally set total power and the power output values of the respective USB ports; each quick charging port directly supports 140W without an additional circuit and a device except a power device; when the AC-DC primary voltage reduction application scene is adopted, a Power Factor Correction (PFC) and an optical coupler feedback circuit are integrated; the reliability of the circuit is improved by the digital optical coupler feedback circuit; the invention uses DAC and PWM to realize feedback circuit of control optical coupler; the power calibration factor circuit is digitalized, so that the reliability of the circuit is improved; supporting various different types of power devices such as MOS, gallium nitride (GaN) and silicon carbide (SiC); integrating a quick charge protocol circuit, a charge and discharge circuit and a digital control logic; temperature, overvoltage, overcurrent and undervoltage protection circuits are embedded; the output power can be dynamically distributed according to the load without changing devices on the PCB; the output power among the multiple ports can be dynamically adjusted according to actual use; the embedded load is full of the detection circuit, and the battery of the mobile device is protected.

The embodiments of the present application will be further described with reference to the accompanying drawings.

Fig. 2 is a schematic structural diagram of a charging circuit based on multiple protocols according to an embodiment of the present disclosure, wherein the charging circuit is connected to an external circuit; the charging circuit includes:

the device comprises a sampling module, a feedback module, a PFC control module, a control logic module, a protocol module and a driving module; the control logic module is respectively connected with the sampling module, the feedback module, the PFC control module, the protocol module and the driving module; the sampling module is connected with an external circuit through a pin 101, and is used for acquiring a sampling signal from the external circuit and sending the sampling signal to the control logic module; the protocol module is connected with one or more USB ports through a pin 102 and is used for detecting protocol information of a load of the charging circuit and sending the protocol information to the control logic module; the control logic module is used for generating a first control signal and a second control signal based on the sampling signal and the protocol information, sending the first control signal to the feedback module and sending the second control signal to the PFC control module; the feedback module is connected with the external circuit through a pin 103 and used for acquiring a first control signal from the control logic module and controlling an optical coupling switch in the external circuit based on the first control signal; the PFC control module is connected to the external circuit through a pin 104, and is configured to obtain a second control signal from the control logic module, and control the MOS switch in the external circuit based on the second control signal; the driving module is connected with an external circuit through an interface 105, and is used for converting electric energy provided by the external circuit into output electric energy and outputting the output electric energy to a load; the charging circuit dynamically distributes the output power based on the load and the power provided by the external circuit.

For example, the multi-protocol based charging circuit may dynamically allocate the output power of two output interfaces (USB interfaces). For example, the external circuit input is rated with a total power of 140W, and when one of the USB interfaces is plugged into use alone, the charging circuit can allocate an output of 140W for the USB interface; when two USB interfaces are used simultaneously, the charging circuit can distribute the output power of each USB interface according to the actual condition of the load corresponding to each USB interface, and if the maximum load inserted into one of the USB interfaces only needs 30W, the charging circuit can distribute 110W of output power for the other USB interface; for another example, when the maximum load inserted into one of the USB interfaces only needs 45W, the charging circuit may allocate 95W of output power to the other USB interface.

Through the charging circuit based on the multi-protocol provided by the embodiment of the application, compared with the traditional technology, the charging circuit can save a voltage stabilizing diode, save a power correcting circuit chip and output two paths of independent PD quick charging voltages simultaneously, and can dynamically distribute two paths of independent output powers, so that charging equipment can provide a multi-port independent quick charging function under the lower production cost, and the technical problem of higher production cost of two-port multi-protocol charging equipment in the prior art is solved. The circuit can be applied to adapters, power strips, mobile power supplies and other scenes.

The above-described modules are described in detail below.

In some embodiments, the sampling module comprises: the device comprises a MUX unit, a SARADC unit and a digital filtering calibration module; the input end of the MUX unit is connected with an external circuit, and the output end of the MUX unit is connected with the input end of the SARADC unit; the output end of the SARADC unit is connected with the input end of the digital filtering calibration module; and the output end of the digital filtering calibration module is connected with the control logic module.

Illustratively, as shown in fig. 3, in the embodiment of the present application, 12-bit SAR ADC analog-to-digital conversion is adopted, and the main function is to provide the sampled voltage and current to the control logic module to determine whether the power output magnitude is in accordance with the expectation, sampling of various protocol signals, PFC signal feedback, and signal sampling of the feedback module. The MUX selects multiple analog inputs to share one SAR ADC; a Programmable Gain Amplifier (PGA) mainly performs Gain amplification on a signal with a small input amplitude, such as current or temperature, and then inputs the signal to an ADC for conversion; the SAR ADC mainly has the function of converting an analog signal into a digital signal, and the effective bit ENOB of the SAR ADC is actually tested to be 11 bits. The digital output from ADC will go to digital filter and calibration circuit module, which mainly has the function of filtering out the unreasonable analog converted data caused by jitter and preventing the ADC value from going to control logic module to make wrong judgment. The circuit supports straight-through, 2, 4, 8, 16, 32 and 64 times of filtering sampling; the calibration circuit is used for compensating the deviation of the final reading value of the SAR ADC and the theoretical value caused by the process, PCB wiring and device deviation during the production of the SAR ADC, so that the deviation of the ADC reading value received by the control logic unit and the theoretical value can be reduced.

In some embodiments, the feedback module comprises: a DAC unit and a first PWM controller; the input end of the DAC unit is connected with the control logic module, and the output end of the DAC unit is connected with the optocoupler switch; the input end of the first PWM controller is connected with the control logic module, and the output end of the first PWM controller is connected with the optocoupler switch.

Illustratively, as shown in fig. 4, the feedback module mainly functions to provide a reference voltage and a current of the optocoupler to achieve the purpose of adjusting the pulse width ratio of the PWM controller on the AC side, so as to control the DC output voltage on the secondary side. And a PWM pulse width controller is used by default to adjust the duty ratio to reach the voltage required by the optocoupler, and a resistor and a capacitor are required to be connected externally when the PWM controller is used. Another way is to directly use a conventional DAC to adjust the required output voltage of the optocoupler, where the externally required resistance and capacitance values are different from those used with a PWM controller. The adjustment of the voltage output is controlled by a control logic module, and the output voltage is adjusted according to the numerical value obtained by the sampling module.

In some embodiments, the drive module comprises: the device comprises a first level conversion unit, a second level conversion unit, a third level conversion unit, a bootstrap voltage detection unit, a high-voltage side driving unit and a low-voltage side driving unit; the input end of the first level conversion unit is connected with the control logic module, and the output end of the first level conversion unit is connected with the second level conversion unit; the first output end of the second level conversion unit is connected with the input end of the bootstrap voltage detection unit; the second output end of the second level conversion is connected with the input end of the high-voltage side driving unit; a third output end of the second level conversion is connected with the output end of the bootstrap voltage detection unit and the output end of the high-voltage side driving unit; the input end of the third level conversion unit is connected with the control logic module, and the output end of the third level conversion unit is respectively connected with the first input end of the low-voltage side driving unit and the input end of the voltage detection unit; the output end of the voltage detection unit is connected with the second input end of the low-voltage side driving unit.

For example, as shown in fig. 5, the main function of the driving module is to output voltage, and the driving circuit may provide a complete power device in full-bridge topology, or may provide 2 groups of power devices in half-bridge topology, so as to output two independent voltages simultaneously. When the whole system is realized by a group of full-bridge power devices, the PFC control module, the feedback module and the sampling module are matched to realize the primary voltage reduction of one USB port, and the other USB port realizes the function of voltage reduction BUCK-BOOST. If the whole system is realized by two groups of half-bridge power, the control logic can output two paths of voltage reduction BUCK functions to achieve two paths of independent output voltages. The voltage and power of the two paths of outputs are obtained after negotiation between the protocol module and the load.

In some embodiments, the control logic module comprises: the device comprises an ALU unit, an MAU unit, an interface logic unit, a storage unit, a flow scheduler, a timer, a storage controller, a door watching port and an analog calibration circuit; the ALU unit, MAU unit, interface logic unit, memory unit, process scheduler, timer, memory controller, look-up gate, and analog calibration circuitry are integrated into the control logic block.

Illustratively, as shown in fig. 6, the control logic module is a main circuit for controlling the whole process, and the control logic module is used for integrally managing and controlling the device plugging-in and unplugging, protocol judgment, output voltage and output current control, optical coupler voltage and current control to the control of the phase of the PFC switch, output power control, overvoltage, overcurrent, and overtemperature alarm, etc. The ALU unit and the MAU unit are an arithmetic logic unit and a multiplication and addition operation unit, and the two circuits are used for accelerating the operation speed. The storage unit is used as a buffer for intermediate data, such as an operation process, a data buffer during protocol analysis, a data buffer during encryption and decryption, an interface data buffer, and the like. The memory controller is mainly used for controlling and scheduling the circuit when the circuit needs to be used in a memory unit. The doorways and the timers are mainly used for periodically counting to ensure the timeliness and the timing of the whole system. The analog calibration circuit is mainly used for calibrating and simulating the compensation of the nonlinearity and the consistency deviation of the device caused by process, voltage and temperature (PVT); the calibration is to make the process scheduling more accurate and consistent in determining voltage, current and temperature. The flow scheduler mainly has the functions of controlling all operations of the whole flow from insertion detection, extraction detection, protocol type judgment, protocol content analysis, voltage regulation control, voltage detection control, current detection control, temperature detection control, sampling module control, feedback module control, circuit control of a PFC control module, circuit control of a driving module, power dynamic regulation and the like to be completed in a control logic module; alternatively, the control logic module may be implemented as a microcontroller.

In some embodiments, the protocol module comprises: CC controller and DP/DM circuit module; and the CC controller and the DP/DM circuit module are respectively connected with the control logic module.

Illustratively, as shown in fig. 7, the protocol module detects the types of the fast charging protocol that can be supported after the load is inserted and the maximum power that can be supported. The protocol module mainly has the function of detecting a fast charge protocol supported by a load, and the module supports PD2.0/3.0/3.1, BC1.2, QC/2.0/3.0/4.0/5.0, apple fast charge protocol, MTK fast charge protocol, Huacheng FCP/SCP/SSCP, converged fast charge protocol (UFCS), Samsung fast charge protocol and the like. The DP/DM circuit module is responsible for detecting the DP/DM voltage of the USB port and generating the voltage. Generating a waveform of a specific protocol on a DP/DM circuit, such as a fast charging protocol of integrated fast charging (UFCS) and FCP/SCP/SSCP; the main functions of the CC controller are to send and receive the standard required by PD protocol CC (one pin of CC1 or CC2) communication, such as discriminating CC (CC1 or CC2) and VCONN (CC2 or CC1), and to provide 5V voltage to VCONN, send the protocol signal required by PD at CC pin, receive the information sent by the mobile device at CC pin, identify the electronic tag (e-Marked) cable, and the CC pin wake-up function. The control logic module judges the type of the current device according to the value obtained by the sampling module, and controls the DP/DM circuit and the CC controller to judge the type of the current device and the maximum power supported by the current device in the judging process.

In some embodiments, the PFC control module comprises: a second PWM controller; the input end of the second PWM controller is connected with the control logic module, and the output end of the second PWM controller is connected with the MOS switch.

For example, as shown in fig. 8, the PFC control module is collocated with the sampling module to control the external MOS switch; the MOS switch enables the output switch phase to be consistent with the phase of load fluctuation, and therefore the whole output efficiency is improved. And the control logic module adjusts the output phase of the PWM controller for controlling the MOS switch according to the numerical value obtained by the sampling module, so that the phases of the output and input switching circuits are synchronous.

Fig. 9 is a schematic flowchart of an application method of a multi-protocol-based charging circuit according to an embodiment of the present application, applied to the multi-protocol-based charging circuit described above; the charging circuit is connected with an external circuit; the charging circuit comprises a sampling module, a feedback module, a PFC control module, a control logic module, a protocol module and a driving module; the control logic module is respectively connected with the sampling module, the feedback module, the PFC control module, the protocol module and the driving module. As shown in fig. 9, the method includes:

step S901, obtaining a sampling signal from an external circuit through a sampling module, and sending the sampling signal to a control logic module.

Step S902, detecting protocol information of the load of the charging circuit by the protocol module, and sending the protocol information to the control logic module.

Step S903, generating a first control signal and a second control signal based on the sampling signal and the protocol information through the control logic module, sending the first control signal to the feedback module, and sending the second control signal to the PFC control module.

Step S904, a first control signal is obtained from the control logic module through the feedback module, and the optocoupler switch in the external circuit is controlled based on the first control signal.

Step S905, a second control signal is obtained from the control logic module through the PFC control module, and the MOS switch in the external circuit is controlled based on the second control signal.

Step S906, converting the electric energy provided by the external circuit into output electric energy through the driving module and outputting the output electric energy to the load.

In step S907, output power is dynamically allocated based on the load and the power provided by the external circuit.

Compared with the prior art, the application method of the charging circuit based on the multi-protocol can save the voltage stabilizing diode, save the power correcting circuit chip, output two independent PD quick charging voltages simultaneously, and dynamically distribute the two independent output powers, so that the charging equipment can provide a multi-port independent quick charging function at a lower production cost, and the technical problem of higher production cost of two-port multi-protocol charging equipment in the prior art is solved. The circuit can be applied to adapters, power strips, mobile power supplies and other scenes.

Fig. 10 is a schematic structural diagram of a dual-port multi-protocol fast charging circuit according to an embodiment of the present disclosure, which includes an external circuit 200, a first USB interface 300, a second USB interface 400, and the multi-protocol based charging circuit 100; the charging circuit 100 based on multiple protocols comprises a sampling module, a feedback module, a PFC control module, a control logic module, a protocol module and a driving module;

the external circuit 200 includes an ac power supply 201, a rectifier bridge 202, a transformer 203, a first MOS switch 204, a second MOS switch 205, an ac PWM controller 206, a diode 207, an inductor 208, a first polarity capacitor 209, a second polarity capacitor 210, a non-polarity capacitor 211, a first resistor 212, a second resistor 213, and an optocoupler switch 214, where the transformer 203 includes a first coil 2031, a second coil 2032, and a third coil 2033;

the positive electrode and the negative electrode of the alternating current power supply 201 are respectively connected with a first pin and a second pin of the rectifier bridge 202; a third pin of the rectifier bridge 202 is connected with a first pin of the first coil 2031 and a first pin of the alternating current PWM controller 206, a second pin of the first coil 2031 is connected with a source of the first MOS switch 204, a gate of the first MOS switch 204 is connected with a second pin of the alternating current PWM controller 206, a third pin of the alternating current PWM controller 206 is connected with a fourth pin of the rectifier bridge 202, a drain of the first MOS switch 204 and a negative electrode of the first polarity capacitor 209, a fourth pin of the alternating current PWM controller 206 is connected with a first pin of the optical coupler switch 214, a positive electrode of the first polarity capacitor 209 is connected with a cathode of the diode 207 and a second pin of the optical coupler switch 214, a first pin of the second coil 2032 is connected with an anode of the diode 207, and a second pin of the second coil 2032 is connected with a negative electrode of the first polarity capacitor 209;

the driving module is respectively connected with a first pin of the inductor 208, a source of the second MOS switch 205, an anode of the second polar capacitor 210, and a first pin of the first resistor 212, the feedback module is respectively connected with a second pin of the first resistor 212, a first pin of the second resistor 213, and a first pin of the nonpolar capacitor 211, a second pin of the nonpolar capacitor 211 is connected with a third pin of the opto-coupler switch 214, the PFC control module is connected with a gate of the second MOS switch 205, the sampling module is respectively connected with a second pin of the second resistor 213, a cathode of the second polar capacitor 210, a drain of the second MOS switch 205, and a first pin of the third coil 2033, and a second pin of the inductor 208 is respectively connected with a second pin of the third coil 2033 and a fourth pin of the opto-coupler switch 214;

the protocol module is connected to the first USB interface 300 and the second USB interface 400, respectively.

The double-port multi-protocol quick charging circuit is suitable for being applied to a secondary voltage reduction independent two-port quick charging application scene, and the application can realize the production fastest, because only an AC side outputs a fixed voltage which is slightly higher than the voltage required by a USB port, and other ideas of using the existing DC-DC are used for realizing quick charging. The existing scheme can not realize independent fast charging of multiple ports on the same circuit, if the multiple ports are supported, the independent fast charging of two USB ports can be supported by one chip.

Through the quick charging circuit of two port multiprotocols that this application embodiment provided, compare in the conventional art and can save zener diode, save power correction circuit chip and can export two way independent PD fast charging voltage simultaneously, and can carry out dynamic allocation to two way independent output power, thereby can be under lower manufacturing cost, make battery charging outfit can provide the function of filling soon independently of many ports, alleviated the higher technical problem of manufacturing cost to two port multiprotocol battery charging outfit among the prior art. The circuit can be applied to adapters, power strips, mobile power supplies and other scenes.

Fig. 11 is a schematic structural diagram of another dual-port multi-protocol fast charging circuit according to an embodiment of the present disclosure, which includes an external circuit 200, a first USB interface 300, a second USB interface 400, and the multi-protocol based charging circuit 100; the charging circuit 100 based on multiple protocols comprises a sampling module, a feedback module, a PFC control module, a control logic module, a protocol module and a driving module;

the external circuit 200 includes an ac power supply 201, a rectifier bridge 202, a transformer 203, a first MOS switch 204, a second MOS switch 205, an ac PWM controller 206, a diode 207, an inductance 208, a first polarity capacitance 209, a second polarity capacitance 210, a non-polarity capacitance 211, a first resistor 212, a second resistor 213, and an opto-coupler switch 214, the transformer 203 includes a first coil 2031, a second coil 2032, and a third coil 2033;

the driving module is connected with a first pin of the inductor 208, a source of the second MOS switch 205, an anode of the second polar capacitor 210, a first pin of the first resistor 212, and a first USB interface, the feedback module is connected with a second pin of the first resistor 212, a first pin of the second resistor 213, and a first pin of the non-polar capacitor 211, a second pin of the non-polar capacitor 211 is connected with a third pin of the opto-coupler switch 214, the PFC control module is connected with a gate of the second MOS switch 205, the sampling module is connected with a second pin of the second resistor 213, a negative electrode of the second polar capacitor 210, a drain of the second MOS switch 205, and a first pin of the third coil 2033, and a second pin of the inductor 208 is connected with a second pin of the third coil 2033 and a fourth pin of the opto-coupler switch 214;

the protocol module is connected to the second USB interface 400.

The double-port multi-protocol quick charge circuit is suitable for being applied to a two-port quick charge application scene needing one-time voltage reduction and independence, the voltage output at the primary side of AC is adjusted by feeding back information to a PWM (pulse width modulation) controller at the primary side through an optical coupler, and whether quick charge at a second USB port is BOOST (BOOST) or BUCK (BUCK) is determined by the other port according to load and the voltage converted at the current primary side. The benefit of this approach is that the output voltage at one of the two ports is supplied directly from the AC side PWM without a further step down, which can increase the efficiency of one of the ports without increasing the cost.

Through another kind of two port multi-protocol's quick charge circuit that this application embodiment provided, compare in the conventional art and can save zener diode, save power correction circuit chip and can export two ways of independent PD fast charging voltage simultaneously, and can carry out dynamic allocation to two ways of independent output power, thereby can be under lower manufacturing cost, make battery charging outfit can provide many ports independent quick charge function, alleviated the higher technical problem of manufacturing cost to two port multi-protocol battery charging outfit among the prior art. The circuit can be applied to adapters, power strips, mobile power supplies and other scenes.

It will be understood by those skilled in the art that in the method of the present invention, the order of writing the steps does not imply a strict order of execution and any limitations on the implementation, and the specific order of execution of the steps should be determined by their function and possible inherent logic.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. In the several embodiments provided in the present disclosure, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present disclosure. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

Finally, it should be noted that: the above-mentioned embodiments are merely specific embodiments of the present disclosure, which are used for illustrating the technical solutions of the present disclosure and not for limiting the same, and the scope of the present disclosure is not limited thereto, and although the present disclosure is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still make modifications or changes to the embodiments described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope of the disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present disclosure, and should be construed as being included therein. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A multi-protocol based charging circuit, wherein the charging circuit is connected to an external circuit; the charging circuit includes:

the device comprises a sampling module, a feedback module, a PFC control module, a control logic module, a protocol module and a driving module;

the PFC control module is used for acquiring the second control signal from the control logic module and controlling an MOS switch in the external circuit based on the second control signal;

2. The charging circuit of claim 1, wherein the sampling module comprises:

the device comprises a MUX unit, a SARADC unit and a digital filtering calibration module;

3. The charging circuit of claim 1, wherein the feedback module comprises:

a DAC unit and a first PWM controller;

4. The charging circuit of claim 1, wherein the driving module comprises:

5. The charging circuit of claim 1, wherein the control logic module comprises:

the system comprises an ALU unit, an MAU unit, an interface logic unit, a storage unit, a flow scheduler, a timer, a storage controller, a door watching port and an analog calibration circuit;

the ALU unit, the MAU unit, the interface logic unit, the memory unit, the process scheduler, the timer, the memory controller, the door view gate, and the analog calibration circuit are integrated in the control logic module.

6. The charging circuit of claim 1, wherein the protocol module comprises:

CC controller and DP/DM circuit module;

7. The charging circuit of claim 1, wherein the PFC control module comprises:

a second PWM controller;

8. A method for applying a charging circuit based on multiple protocols, characterized by applying to a charging circuit according to any one of claims 1-7; the charging circuit is connected with an external circuit; the charging circuit comprises a sampling module, a feedback module, a PFC control module, a control logic module, a protocol module and a driving module; the control logic module is respectively connected with the sampling module, the feedback module, the PFC control module, the protocol module and the driving module; the method comprises the following steps:

9. A dual port multi-protocol fast charging circuit, comprising an external circuit, a first USB interface, a second USB interface, and a multi-protocol based charging circuit according to any one of claims 1-7; the charging circuit based on the multi-protocol comprises a sampling module, a feedback module, a PFC control module, a control logic module, a protocol module and a driving module;

the positive pole and the negative pole of the alternating current power supply are respectively connected with the first pin and the second pin of the rectifier bridge; the third pin of the rectifier bridge is respectively connected with the first pin of the first coil and the first pin of the alternating current PWM controller, the second pin of the first coil is connected with the source electrode of the first MOS switch, the grid electrode of the first MOS switch is connected with the second pin of the alternating current PWM controller, a third pin of the alternating current PWM controller is respectively connected with a fourth pin of the rectifier bridge, a drain electrode of the first MOS switch and a negative electrode of the first polarity capacitor, a fourth pin of the alternating current PWM controller is connected with a first pin of the optical coupling switch, the anode of the first polarity capacitor is respectively connected with the cathode of the diode and a second pin of the optical coupling switch, a first pin of the second coil is connected with an anode of the diode, and a second pin of the second coil is connected with a cathode of the first polarity capacitor;

10. A dual-port multi-protocol fast charging circuit, comprising an external circuit, a first USB interface, a second USB interface, and the multi-protocol based charging circuit of any one of claims 1-7; the charging circuit based on the multi-protocol comprises a sampling module, a feedback module, a PFC control module, a control logic module, a protocol module and a driving module;

the protocol module is connected with the second USB interface.