Single-stage PFC gallium nitride power supply non-inductive power distribution method and system

Abstract

The invention relates to a single-stage PFC gallium nitride power supply non-inductive power distribution method and system, and the method comprises the following steps: a main control chip of a gallium nitride power supply monitors the states of a plurality of charging interfaces, and builds communication with a load and obtains the charging parameter information of the load when there is a charging interface connected with the load; if the acquisition fails, adopting a set detection charging strategy to charge the load, and monitoring a temperature change curve of the charging interface; the main control chip predicts an output power value range when the charging interface reaches a set safe charging range according to the fed-back temperature change curve; matching a set charging strategy according to the obtained output power value range; by applying the method, the method is not only suitable for loads capable of obtaining the charging parameters through communication, but also suitable for most loads incapable of obtaining the charging parameters through communication, load charging power distribution can be carried out according to the priority, adaptability is better, and charging is more scientific and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of gallium nitride power supplies, and more specifically, to a single-stage PFC gallium nitride power supply non-inductive power distribution method and system. Background Art

[0002] GaN power supply is a power module designed by utilizing the superior properties of GaN materials. It has the advantages of high energy efficiency, small size, high temperature stability and wide application fields. The combination of GaN power supply and PFC technology is an important trend in the field of power supply design in recent years. Its core lies in optimizing the performance of power factor correction (PFC) circuits through the high frequency and high efficiency characteristics of GaN devices. When existing single-stage PFC gallium nitride power supplies are connected to multiple different loads, it is usually difficult to intelligently distribute the power, or it is necessary to collect the load model, match the model, and then select the stored corresponding power for output. This method can solve the problem to a certain extent, but the defects are also very obvious: 1. Unable to match loads of unknown models; 2. The power distribution between multiple loads charged at the same time is unclear. A single-stage PFC gallium nitride power supply non-inductive power distribution method and system that can solve this defect is needed. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a single-stage PFC gallium nitride power supply non-inductive power distribution method and a single-stage PFC gallium nitride power supply non-inductive power distribution system in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A single-stage PFC gallium nitride power supply non-inductive power distribution method is constructed, characterized in that the method comprises the following steps: Step 1: The main control chip of the GaN power supply monitors the status of multiple charging interfaces. When a charging interface is connected to a load, it establishes communication with the load and obtains the charging parameter information of the load. If the acquisition is successful, it generates a charging strategy according to the charging parameter information and jumps to step 5. If the acquisition fails, it proceeds to the next step. Step 2: Use the set detection charging strategy to charge the load and monitor the temperature change curve of the charging interface; Step 3: The main control chip predicts the output power value range when the charging interface reaches the set safe charging range based on the feedback temperature change curve; Step 4: Match the set charging strategy according to the obtained output power value range; Step 5: When only a single charging port is connected to a load, the load is charged directly according to the charging strategy; Step 6: When there are multiple charging interfaces connected to loads, determine whether the sum of the powers corresponding to the multiple charging strategies exceeds the total output power of the power supply. If not, charge the corresponding loads directly according to the charging strategy. If yes, charge according to the set priority strategy. Step 7: During the charging process, the charging status of the load is constantly monitored. If any abnormality occurs, charging is stopped and a warning is issued.

[0005] The single-stage PFC gallium nitride power supply non-inductive power distribution method of the present invention, wherein the charging of the load by adopting a set detection charging strategy comprises: According to the set charging current curve with a gradually increasing trend, the charging current is gradually increased; After the entire charging current curve is completed, the load is charged with the set minimum current and waits for subsequent actions.

[0006] In the non-inductive power distribution method of the single-stage PFC gallium nitride power supply of the present invention, the charging current curve is obtained by: Get information about multiple commonly used loads; Count the maximum charging current value of each load under safe charging state; Taking the minimum value among the multiple maximum charging current values ​​as the vertex value of the charging current curve, and subtracting a constant value from the vertex value as the starting value of the charging current curve; A coordinate system is established with time as the horizontal axis and the charging current value as the vertical axis, and a charging current curve is generated in the coordinate system with the set curvature, vertex value and starting value.

[0007] The single-stage PFC gallium nitride power supply non-inductive power distribution method described in the present invention, wherein the charging current curve corresponds to a plurality of the same product type. If it is possible to face a scenario where multiple loads of different product types are charged at the same time, multiple charging current curves are set, and the multiple charging current curves are bound to multiple charging interfaces in a one-to-one correspondence.

[0008] The single-stage PFC gallium nitride power supply non-inductive power distribution method of the present invention, wherein the priority strategy includes: Sort by the set priority from high to low, and give priority to charging the loads with high priority; If the priorities are the same, determine whether the sum of the power required by all loads with the same priority is greater than the allocatable power. If so, distribute the allocatable power evenly; otherwise, charge all loads with the same priority at the same time.

[0009] The single-stage PFC gallium nitride power supply non-inductive power distribution method described in the present invention, wherein the gallium nitride power supply is configured with a temperature detection resistor circuit for each charging interface, the loop of the temperature detection resistor circuit includes a thermistor attached to the charging interface, and the temperature change curve is obtained by monitoring the voltage or current in the loop of the temperature detection resistor circuit.

[0010] The single-stage PFC gallium nitride power supply non-inductive power distribution method of the present invention, wherein the gallium nitride power supply establishes communication with the connected load according to a set protocol and obtains charging parameter information of the load.

[0011] A single-stage PFC gallium nitride power supply non-inductive power distribution system, wherein the system comprises: a main control chip, multiple charging interfaces, multiple interface temperature detection units and a memory; The interface temperature detection unit is used to detect the temperature of the charging interface; The memory is used to store the set charging strategy; The main control chip is used to execute the above-mentioned single-stage PFC gallium nitride power supply non-inductive power distribution method.

[0012] The beneficial effects of the present invention are as follows: the application of the method of the present application is not only suitable for loads that can communicate to obtain charging parameters, but can also adapt to most loads that cannot communicate to obtain charging parameters, and can allocate load charging power according to priority, with better adaptability and more scientific and efficient charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work: Figure 1 This is a flow chart of a non-inductive power distribution method for a single-stage PFC gallium nitride power supply according to a preferred embodiment of the present invention; Figure 2 It is a principle block diagram of a single-stage PFC gallium nitride power supply non-inductive power distribution system of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0015] The non-inductive power distribution method of the single-stage PFC gallium nitride power supply in the preferred embodiment of the present invention is as follows Figure 1 shown, and includes the following steps: S01: The main control chip of the gallium nitride power supply monitors the states of multiple charging interfaces. When there is a load connected to a charging interface, it establishes communication with the load and obtains the charging parameter information of the load. If the acquisition is successful, it generates a charging strategy according to the charging parameter information and jumps to step five. If the acquisition fails, it proceeds to the next step; In the first step, load identification is performed. If the identification is successful, it can directly jump to the priority allocation link. Otherwise, output power prediction is required, and the prediction method is as described below; S02: Charge the load using the set detection charging strategy and monitor the temperature change curve of the charging interface; Specifically, it includes: Gradually increase the charging current according to the set charging current curve showing a gradually rising trend; After completing the entire charging current curve, charge the load with the set minimum current and wait for subsequent actions.

[0016] The charging current curve is obtained by: Obtain the information of multiple common loads; Statistically calculate the maximum charging current value in the safe charging state of each load; Take the minimum value among multiple maximum charging current values as the vertex value of the charging current curve, and subtract a constant value from the vertex value as the starting value of the charging current curve; Establish a coordinate system with time as the horizontal axis and the charging current value as the vertical axis, and generate a charging current curve in the coordinate system with the set curvature, vertex value, and starting value; Among them, the constant value and the set curvature can be set according to experience and are not limited in this regard; Since there may be a large span in the charging power between different types of products, further product type limitations are required: The charging current curve corresponds to multiple loads belonging to the same product type. If there may be a scenario where multiple loads of different product types are charged simultaneously, set multiple charging current curves and bind the multiple charging current curves to multiple charging interfaces one by one; Taking the mobile phone type and the laptop computer type as examples, two different charging interfaces need to be configured accordingly. The charging current curve of each charging interface is designed for the two products respectively, which can effectively solve the problem of too large a span when there are multiple product types; It can be understood that if it is only for one product type, such as a mobile phone, then it is not necessary to be so complicated, and only one charging current curve needs to be designed.

[0017] S03: The main control chip predicts the output power value range when the charging interface reaches the set safe charging range according to the feedback temperature change curve; Since the specific charging data of the load cannot be obtained, it is necessary to make a prediction based on the curve at this time. Generally, it can be considered that when the temperature of the charging interface does not exceed the safe range value, the charging is generally safe and stable. Of course, in the subsequent step seven, the charging state is further supplemented to ensure charging safety; S04: Match the set charging strategy according to the obtained output power value range; The charging strategy can be further customized here. Specifically, the charging process can be divided into: fast charging, slow charging, and trickle charging processes. The design of this part can adopt the existing design and will not be elaborated here; S05: When only a single charging interface is connected to a load, directly charge the load according to the charging strategy; if there is only one load, there will be no problem of power distribution for multiple loads at this time, and the load can be directly charged according to the charging strategy; S06: When multiple charging interfaces are connected to loads, judge whether the sum of the powers corresponding to multiple charging strategies exceeds the total output power of the power supply. If not, directly charge the corresponding load according to the charging strategy. If so, allocate the charging according to the set priority strategy; If there are multiple loads, then it needs to be designed according to actual needs at this time; The priority strategies include: Sort according to the set priority from high to low, and give priority to charging the load with a high priority; If the priorities are the same, judge whether the sum of the powers required by all loads with the same priority is greater than the distributable power. If so, evenly distribute the distributable power, otherwise charge all loads with the same priority at the same time; S07: Continuously detect the charging state of the load during the charging process. If a charging abnormality occurs, stop charging and issue a warning externally; Applying the method of the present application is not only applicable to loads that can obtain charging parameters through communication, but also can adapt to most loads that cannot obtain charging parameters through communication, and can allocate the charging power of the load according to the priority, with better adaptability, and more scientific and efficient charging.

[0018] Preferably, the gallium nitride power supply is configured with a temperature detection resistance circuit for each charging interface. The loop of the temperature detection resistance circuit includes a thermosensitive resistor attached to the charging interface, and the temperature change curve is obtained by monitoring the voltage or current in the loop of the temperature detection resistance circuit.

[0019] Preferably, the gallium nitride power supply establishes communication with the connected load according to a set protocol and obtains charging parameter information of the load.

[0020] A single-stage PFC GaN power supply non-inductive power distribution system, such as Figure 2 As shown, the system includes: a main control chip 10, multiple charging interfaces 11, multiple interface temperature detection units 12 and a memory 13; An interface temperature detection unit 12, used to detect the temperature of the charging interface 11; A memory 13, used for storing a set charging strategy; The main control chip 10 is used to execute the above-mentioned single-stage PFC gallium nitride power supply non-inductive power distribution method; The system applied in the present application is not only suitable for loads that can communicate to obtain charging parameters, but can also adapt to most loads that cannot communicate to obtain charging parameters, and can allocate load charging power according to priority, with better adaptability and more scientific and efficient charging.

[0021] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A method for non-inductive power distribution of a single-stage PFC gallium nitride power supply, characterized in that: The method includes the following steps: Step 1: The main control chip of the gallium nitride power supply monitors the states of multiple charging interfaces. When a charging interface is connected to a load, it establishes communication with the load and obtains the charging parameter information of the load. If the acquisition is successful, it generates a charging strategy according to the charging parameter information and jumps to Step 5. If the acquisition fails, it proceeds to the next step; Step 2: Charge the load using a set detection charging strategy and monitor the temperature change curve of the charging interface; Step 3: Based on the feedback temperature change curve, the main control chip predicts the output power value range when the charging interface reaches the set safe charging range; Step 4: Match the set charging strategy according to the obtained output power value range; Step 5: When only a single charging interface is connected to a load, directly charge the load according to the charging strategy; Step 6: When multiple charging interfaces are connected to loads, determine whether the sum of the powers corresponding to multiple charging strategies exceeds the total output power of the power supply. If not, directly charge the corresponding loads according to the charging strategies. If so, perform charge allocation according to the set priority strategy; Step 7: Continuously detect the charging state of the load during the charging process. If a charging anomaly occurs, stop charging and issue a warning externally.

2. The method for non-inductive power distribution of a single-stage PFC gallium nitride power supply according to claim 1, characterized in that: The charging the load using a set detection charging strategy includes: Gradually increase the charging current according to a set charging current curve showing a gradually increasing trend; After completing the entire charging current curve, charge the load with a set minimum current and wait for subsequent actions.

3. The method for non-inductive power distribution of a single-stage PFC gallium nitride power supply according to claim 2, characterized in that: The acquisition of the charging current curve adopts: Obtain the information of multiple common loads; Statistically calculate the maximum charging current value in the safe charging state of each load; Take the minimum value among multiple maximum charging current values as the vertex value of the charging current curve, and subtract a constant value downward from the vertex value as the starting value of the charging current curve; Establish a coordinate system with time as the horizontal axis and the charging current value as the vertical axis, and generate a charging current curve in the coordinate system with a set curvature, vertex value, and starting value.

4. The method for non-inductive power distribution of a single-stage PFC gallium nitride power supply according to claim 3, characterized in that: The charging current curve corresponds to multiple loads belonging to the same product type. If it is possible to face the scenario of charging multiple loads of different product types simultaneously, set multiple charging current curves and bind the multiple charging current curves to the multiple charging interfaces one by one.

5. The method for non-inductive power distribution of a single-stage PFC gallium nitride power supply according to claim 1, characterized in that: The priority strategy includes: Sort according to the set priorities from high to low, and preferentially satisfy the charging of loads with high priorities; If the priorities are the same, determine whether the sum of the powers required by all loads with the same priority is greater than the distributable power. If so, evenly distribute the distributable power. Otherwise, simultaneously satisfy the charging of all loads with the same priority.

6. The method for non-inductive power distribution of a single-stage PFC gallium nitride power supply according to claim 1, characterized in that: The gallium nitride power supply is configured with a temperature detection resistance circuit for each charging interface. The loop of the temperature detection resistance circuit includes a thermosensitive resistor attached to the charging interface, and the temperature change curve is obtained by monitoring the voltage or current in the loop of the temperature detection resistance circuit.

7. The method for non-inductive power distribution of a single-stage PFC gallium nitride power supply according to claim 1, characterized in that: The gallium nitride power supply establishes communication with the connected load according to a set protocol and obtains the charging parameter information of the load.

8. A single-stage PFC gallium nitride power supply non-inductive power distribution system, characterized in that: The system includes: a main control chip, multiple charging interfaces, multiple interface temperature detection units, and a memory; The interface temperature detection unit is used to detect the temperature of the charging interface; The memory is used to store the set charging strategy; The main control chip is used to execute the non-inductive power distribution method of the single-stage PFC gallium nitride power supply as described in any one of claims 1-7.

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