High voltage linear source output circuit, method, device, equipment, medium and power supply

Abstract

The present application discloses a high-voltage linear source output circuit, method, device, equipment, medium and power supply. By introducing a primary voltage regulation unit, a MOS tube pressure difference detection unit and a bus voltage control unit, accurate regulation of the bus voltage can be achieved. The main control unit can obtain a preset value of the bus voltage according to the measured voltage between the main MOS tube poles and the preset voltage of the MOS tube linear operation. On the basis of achieving accurate regulation of the bus voltage, the preset value of the bus voltage can be used to maintain the voltage between the bus voltage output terminal and the power supply output terminal in a relatively low range, thereby reducing the power consumption of the MOS tube in the linear source.

Description

Technical Field

[0001] The present application relates to the field of power supplies, and in particular to a high-voltage linear source output circuit, method, device, equipment, medium and power supply. Background Art

[0002] Linear power supply is a relatively common power supply. In order to adjust the output voltage, the linear power supply solutions currently on the market usually adopt a method of fixed voltage input and adjusting the gate voltage of the MOS tube. However, when the fixed input voltage encounters an output voltage requirement with a large voltage difference, it will cause a large voltage drop of the MOS tube of the linear power supply (especially in high-voltage linear sources), so that the power consumption of the MOS tube is high. The high power consumption will make the output power of the linear power supply unable to be increased, thereby hindering the development of high-power high-voltage linear sources. Summary of the invention

[0003] The present application aims to provide a high-voltage linear source output circuit, method, device, equipment, medium and power supply, which can effectively reduce the power consumption of MOS tubes in linear sources.

[0004] According to the first aspect of the present application, a high-voltage linear source output circuit includes:

[0005] A primary voltage regulating unit, comprising a primary voltage input terminal, a bus voltage output terminal and an output voltage regulating terminal, wherein the primary voltage input terminal is used to input a working voltage, and the primary voltage regulating unit is used to adjust the bus voltage of the bus voltage output terminal according to the bus feedback voltage input by the output voltage regulating terminal;

[0006] A main power MOS tube unit, whose drain is connected to the bus voltage output terminal and whose source is used as a power output terminal;

[0007] A constant current control unit, used for collecting the power output current flowing through the power output end, and adjusting the gate voltage of the main power MOS tube unit according to the power output current and the voltage corresponding to the output current preset value;

[0008] A constant voltage control unit, used for collecting the power output voltage of the power output terminal, and adjusting the gate voltage of the main power MOS tube unit according to the power output voltage and the voltage corresponding to the preset output voltage value;

[0009] A MOS tube voltage difference detection unit, used to collect the measured voltage between the source and drain of the main power MOS tube unit;

[0010] A bus voltage control unit, used for collecting the bus voltage of the bus voltage output terminal, and adjusting the bus feedback voltage of the output voltage regulating terminal according to the bus voltage of the bus voltage output terminal and the voltage corresponding to the bus voltage preset value;

[0011] A main control unit is used to obtain the output current preset value, the output voltage preset value, and the bus voltage preset value, and output the voltage corresponding to the output current preset value to the constant current control unit, output the voltage corresponding to the output voltage preset value to the constant voltage control unit, and output the voltage corresponding to the bus voltage preset value to the bus voltage control unit; wherein the bus voltage preset value is determined according to the measured voltage between the electrodes of the main MOS tube and the MOS tube linear working preset voltage, and the MOS tube linear working preset voltage is determined according to the electrical structure characteristics of the main power MOS tube unit.

[0012] According to the second aspect of the present application, a high-voltage linear source output circuit control method is applied to the high-voltage linear source output circuit as described above. The high-voltage linear source output circuit control method includes:

[0013] Obtaining the measured voltage between the electrodes of the main MOS tube;

[0014] Determine a preset value of the bus voltage according to the measured voltage between the electrodes of the main MOS tube and the preset linear working voltage of the MOS tube;

[0015] Outputting the voltage corresponding to the preset bus voltage value to a bus voltage control unit, so that the bus voltage control unit adjusts the bus feedback voltage of the output voltage regulating end according to the bus voltage at the bus voltage output end and the voltage corresponding to the preset bus voltage value, so as to adjust the bus voltage;

[0016] The preset linear working voltage of the MOS tube is determined according to the electrical structural characteristics of the main power MOS tube unit.

[0017] According to the third aspect of the present application, a high-voltage linear source output circuit control device is applied to the high-voltage linear source output circuit as described above, and the high-voltage linear source output circuit control device includes:

[0018] An inter-electrode voltage acquisition module, used to obtain the measured inter-electrode voltage of the main MOS tube;

[0019] A bus voltage preset module, used to determine a bus voltage preset value according to the measured voltage between the electrodes of the main MOS tube and the MOS tube linear working preset voltage;

[0020] A bus voltage regulating module, used for outputting the voltage corresponding to the preset bus voltage value to a bus voltage control unit, so that the bus voltage control unit adjusts the bus feedback voltage of the output voltage regulating end according to the bus voltage at the bus voltage output end and the voltage corresponding to the preset bus voltage value, so as to adjust the bus voltage;

[0021] The preset linear working voltage of the MOS tube is determined according to the electrical structural characteristics of the main power MOS tube unit.

[0022] According to a fourth aspect of the present application, the electronic device comprises: a processor and a memory storing computer program instructions;

[0023] When the processor executes the computer program instructions, the high-voltage linear source output circuit control method of the second aspect embodiment is implemented.

[0024] According to the computer-readable storage medium of the fifth aspect embodiment of the present application, computer executable instructions are stored, and the computer executable instructions are used to execute the high-voltage linear source output circuit control method as described in the second aspect embodiment above.

[0025] The power supply according to the present application includes the high-voltage linear source output circuit as described above.

[0026] The high-voltage linear source output circuit, method, device, equipment, medium and power supply of the embodiments of the present application can achieve precise regulation of the bus voltage by introducing a primary voltage regulation unit, a MOS tube pressure difference detection unit and a bus voltage control unit, and the main control unit can obtain a bus voltage preset value according to the measured voltage between the main MOS tube electrodes and the MOS tube linear working preset voltage, and then, on the basis of achieving precise regulation of the bus voltage, the bus voltage preset value can be used to maintain the voltage between the bus voltage output terminal and the power supply output terminal in a lower range, thereby achieving reduction in power consumption of the MOS tube in the linear source.

[0027] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 A system diagram of a high-voltage linear source output circuit provided in an embodiment of the present application;

[0030] Figure 2 A circuit diagram of a primary voltage regulating unit provided in an embodiment of the present application;

[0031] Figure 3 A circuit diagram of a constant current control unit and a constant voltage control unit provided in an embodiment of the present application;

[0032] Figure 4 A circuit diagram of a MOS tube pressure difference detection unit, a bus voltage control unit, and an overvoltage protection unit provided in an embodiment of the present application;

[0033] Figure 5 A flow chart of a high-voltage linear source output circuit control method provided in an embodiment of the present application;

[0034] Figure 6 A schematic diagram of a high-voltage linear source output circuit control device provided in an embodiment of the present application.

[0035] Reference numerals:

[0036] A primary voltage regulating unit 110 , a main power MOS tube unit 120 , a constant current control unit 130 , a constant voltage control unit 140 , a MOS tube pressure difference detection unit 150 , a bus voltage control unit 160 , a main control unit 170 , and an overvoltage protection unit 180 . DETAILED DESCRIPTION

[0037] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0038] In the description of this application, if there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present application, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In the description of this application, it should be noted that, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above terms in this application based on the specific content of the technical solution.

[0041] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments.

[0042] See also Figures 1 to 4 As shown, a high-voltage linear source output circuit provided by an embodiment of the present application includes:

[0043] A primary voltage regulating unit 110, which has a primary voltage input terminal, a bus voltage output terminal and an output voltage regulating terminal, wherein the primary voltage input terminal is used to input a working voltage, and the primary voltage regulating unit 110 is used to adjust the bus voltage of the bus voltage output terminal according to the bus feedback voltage input by the output voltage regulating terminal;

[0044] A main power MOS tube unit 120, whose drain is connected to the bus voltage output terminal and whose source is used as a power output terminal;

[0045] The constant current control unit 130 is used to collect the power output current flowing through the power output terminal, and adjust the gate voltage of the main power MOS tube unit 120 according to the power output current and the voltage corresponding to the output current preset value;

[0046] The constant voltage control unit 140 is used to collect the power output voltage of the power output terminal, and adjust the gate voltage of the main power MOS tube unit 120 according to the power output voltage and the voltage corresponding to the preset value of the output voltage;

[0047] The MOS tube voltage difference detection unit 150 is used to collect the measured voltage between the source and the drain of the main power MOS tube unit 120;

[0048] The bus voltage control unit 160 is used to collect the bus voltage at the bus voltage output terminal, and adjust the bus feedback voltage at the output voltage regulation terminal according to the bus voltage at the bus voltage output terminal and the voltage corresponding to the bus voltage preset value;

[0049] The main control unit 170 is used to obtain an output current preset value, an output voltage preset value, and a bus voltage preset value, and output the voltage corresponding to the output current preset value to the constant current control unit 130, output the voltage corresponding to the output voltage preset value to the constant voltage control unit 140, and output the voltage corresponding to the bus voltage preset value to the bus voltage control unit 160; wherein the bus voltage preset value is determined based on the actual measured voltage between the electrodes of the main MOS tube and the MOS tube linear working preset voltage, and the MOS tube linear working preset voltage is determined based on the electrical structure characteristics of the main power MOS tube unit 120.

[0050] In the embodiment of the present application, by introducing the primary voltage regulation unit 110, the MOS tube pressure difference detection unit 150, and the bus voltage control unit 160, the bus voltage can be accurately regulated, and the main control unit 170 can obtain the bus voltage preset value according to the measured voltage between the main MOS tube electrodes and the MOS tube linear working preset voltage, and then on the basis of realizing the accurate regulation of the bus voltage, the bus voltage preset value can be used to maintain the voltage between the bus voltage output end and the power supply output end in a lower range, thereby achieving the reduction of the power consumption of the linear source MOS tube (Metal Oxide-Semiconductor Field Effect Transistor).

[0051] The working voltage input to the primary voltage input terminal of the primary voltage regulating unit 110 is fixed, and the output voltage regulating terminal is used to access the bus feedback voltage output by the bus voltage control unit 160, so that the output voltage of the bus voltage output terminal can be adjusted according to the bus feedback voltage input to the output voltage regulating terminal.

[0052] The primary voltage regulation unit 110 may be implemented in a variety of forms, and the specific implementation form is not specifically limited in this application, and only needs to be able to achieve output voltage regulation according to the bus feedback voltage.

[0053] Here, an implementation scheme for the primary voltage regulating unit 110 is given, such as Figure 2 As shown, the primary voltage regulation unit 110 includes a transformer (such as Figure 2 As shown in T1), primary MOS tube (such as Figure 2 As shown in Q1), a primary MOS tube regulating unit; one end of the primary side of the transformer is used as a primary voltage input end, and the other end is connected to the drain of the primary MOS tube, and the secondary side of the transformer is used as a bus voltage output end; the source of the primary MOS tube is connected to the ground wire, and the gate is connected to the bus voltage control unit 160 through the primary MOS tube regulating unit; one end of the primary MOS tube regulating unit connected to the bus voltage control unit 160 is used as an output voltage regulating end; the bus voltage control unit 160 adjusts the gate voltage of the primary MOS tube through the primary MOS tube regulating unit to adjust the output voltage of the secondary side of the transformer.

[0054] The above-mentioned primary MOS tube adjustment unit may include an isolation optical coupler for realizing isolation between strong and weak electricity to prevent strong electricity from damaging the control circuit.

[0055] The primary voltage regulating unit 110 may also directly adopt a digital transformer with voltage regulating capability, or any other circuit with voltage regulating capability.

[0056] The main power MOS tube unit 120 may include a MOS tube or a MOS tube group composed of multiple MOS tubes in cascade. When set as a MOS tube group, the measured voltage between the electrodes of the main MOS tube can be understood as directly detecting the voltage between the two ends of the entire MOS tube group for the main current to flow through. Figures 1 to 4 In the example, a MOS tube (such as Figures 1 to 4 The schematic diagram of Q2) is shown in FIG.

[0057] like Figure 3 As shown, in some embodiments, the constant current control unit 130 is composed of operational amplifiers U7 and U5 as the core; wherein the operational amplifier U7 is used to construct a collection circuit for collecting the voltage across the current sampling resistor connected in series at the bus voltage output terminal to obtain the sampling result of the power supply output current; the operational amplifier U5 is used to construct a comparison amplifier circuit, the negative input terminal of the operational amplifier U5 is used to input the sampling result of the power supply output current, and the positive input terminal is used to input the voltage corresponding to the preset value of the output current (such as Figure 3 As shown in Iout_set), the closed-loop control of the output current can be completed according to the sampling results of the voltage corresponding to the output current preset value and the power supply output current. It should be noted that when in the constant voltage mode, there is no need to give the output current preset value.

[0058] like Figure 3 As shown, in some embodiments, the constant voltage control unit 140 is composed of operational amplifiers U8 and U6 as the core; wherein the operational amplifier U8 is used to construct an acquisition circuit for acquiring the power supply output voltage at the bus voltage output terminal to obtain a sampling result of the power supply output voltage; the operational amplifier U6 is used to construct a comparison amplifier circuit, the negative input terminal of the operational amplifier U6 is used to input the sampling result of the power supply output voltage, and the positive input terminal is used to input the voltage corresponding to the preset value of the output voltage (such as Figure 3 As shown in Vout_set), the closed-loop control of the output voltage can be completed according to the voltage corresponding to the output voltage preset value and the sampling result of the power supply output voltage. It should be noted that when in the constant current mode, there is no need to give the output voltage preset value.

[0059] like Figure 4 As shown, in some embodiments, the MOS tube voltage difference detection unit 150 is composed of an operational amplifier U3 as a core, and the operational amplifier U3 is used to construct an acquisition circuit for collecting the measured voltage between the main MOS tube electrodes between the source and the drain of the main power MOS tube unit 120 to obtain a sampling result of the measured voltage between the main MOS tube electrodes.

[0060] like Figure 4As shown, in some embodiments, the bus voltage control unit 160 is composed of operational amplifiers U4 and U2 as the core; wherein the operational amplifier U4 is used to construct an acquisition circuit for collecting the bus voltage to obtain a sampling result of the bus voltage; the operational amplifier U2 is used to construct a comparison amplifier circuit, the negative input terminal of the operational amplifier U2 is used to input the sampling result of the bus voltage, and the positive input terminal is used to input the voltage corresponding to the preset value of the bus voltage (such as Figure 4 HV_set as shown in , and then the closed-loop control of the bus voltage can be completed according to the voltage corresponding to the output bus voltage preset value and the sampling result of the bus voltage.

[0061] The above-mentioned MOS tube linear working preset voltage is determined according to the electrical structural characteristics of the main power MOS tube unit 120. The main power MOS tube unit 120 uses different types of MOS tubes and has different electrical structural characteristics, that is, it is necessary to maintain the voltage between the source and the drain of the MOS tube at a suitable voltage difference so that the MOS tube can work in the linear working area. In the embodiment of the present application, the result of the smaller voltage between the source and the drain of the MOS tube is preferred, and the MOS tube only needs to be operated in the linear working area, thereby effectively reducing the power consumption of the MOS tube. In some embodiments, the voltage between the source and the drain of the MOS tube can be maintained at 30V according to the model of the MOS tube.

[0062] The above-mentioned bus voltage preset value can be used to adjust the bus feedback voltage output by the bus voltage control unit 160. The bus voltage preset value is mainly determined according to the actual measured voltage between the electrodes of the main MOS tube and the linear working preset voltage of the MOS tube. The linear working preset voltage of the MOS tube is an ideal state. In actual operation, it may be impossible to maintain the voltage between the drain and the source of the MOS tube at the linear working preset voltage of the MOS tube. At this time, the bus voltage preset value can be corrected by detecting the actual measured voltage between the electrodes of the main MOS tube and using the actual measured voltage between the electrodes of the main MOS tube, thereby avoiding the situation where the MOS tube cannot work in the linear region due to the voltage between the drain and the source being too low.

[0063] The above-mentioned output current preset value and output voltage preset value can be directly input by the user from the human-computer interaction unit.

[0064] In some embodiments, Figure 4 As shown, the high voltage linear source output circuit also includes:

[0065] The overvoltage protection unit 180 is connected between the MOS tube pressure difference detection unit 150 and the output voltage regulation end, and is used to adjust the bus feedback voltage of the output voltage regulation end according to the actual measured voltage between the main MOS tube electrodes and the overvoltage protection preset voltage. The overvoltage protection preset voltage is greater than the MOS tube linear working preset voltage.

[0066] The overvoltage protection unit 180 is composed of an operational amplifier U1 as a core. The operational amplifier U1 is used to construct a comparison amplifier circuit. The negative input terminal of the operational amplifier U1 is used to input the sampling result of the measured voltage between the main MOS tube electrodes, and the positive input terminal is used to input the overvoltage protection preset voltage (such as Figure 4 Vmos_ovp) is shown in FIG, and protection control can be implemented according to the sampling result of the overvoltage protection preset voltage and the actual measured voltage between the main MOS tube electrodes.

[0067] The overvoltage protection preset voltage needs to be greater than the MOS tube linear working preset voltage, so as to avoid triggering the overvoltage protection when the high voltage linear source is in normal operation. The overvoltage protection action can be to directly disconnect the input or output of the primary voltage regulating unit 110.

[0068] It should be noted that the operational amplifiers in each module unit in the embodiment of the present application have the functions of shrinking and amplifying. Among them, a shrinking design is adopted for the sampling circuit part, and an amplifying design is adopted for the comparison amplifier circuit part. The specific shrinking or amplifying factor can be adjusted according to the actual situation.

[0069] In addition, after each preset value is determined in the embodiment of the present application, the digital-to-analog conversion unit (such as Figure 1 The DAC shown in FIG. 1 is converted into a corresponding voltage to realize the control of the corresponding comparison amplifier circuit. Each voltage sampling result and current sampling result can be converted into a corresponding voltage by an analog-to-digital conversion unit (such as Figure 1 The ADC shown in FIG. 1 is converted into a corresponding digital quantity so that the main control unit 170 can complete logical operations and control. The accuracy of the digital quantity depends on the number of bits of analog-to-digital conversion and digital-to-analog conversion. For example, in this application, 16-bit accuracy can be used.

[0070] In some implementations, the main power MOS tube unit 120 is composed of at least one MOS tube.

[0071] The main power MOS tube unit 120 may include a MOS tube or a MOS tube group composed of multiple MOS tubes in cascade. When set as a MOS tube group, the measured voltage between the electrodes of the main MOS tube can be understood as directly detecting the voltage between the two ends of the entire MOS tube group for the main current to flow through. Figure 1 Medium to Figure 4 In the figure, a schematic diagram for setting up a MOS tube is given.

[0072] See also Figure 5 As shown, Figure 5 : is a flow chart of a high-voltage linear source output circuit control method provided by an embodiment of the present application, and the high-voltage linear source output circuit control method includes:

[0073] Get the measured voltage between the electrodes of the main MOS tube;

[0074] Determine the preset value of the bus voltage according to the measured voltage between the electrodes of the main MOS tube and the preset voltage of the MOS tube linear operation;

[0075] Outputting a voltage corresponding to the preset value of the bus voltage to the bus voltage control unit 160, so that the bus voltage control unit 160 adjusts the bus feedback voltage of the output voltage regulating end according to the bus voltage at the bus voltage output end and the voltage corresponding to the preset value of the bus voltage, so as to adjust the bus voltage;

[0076] The MOS tube linear operation preset voltage is determined according to the electrical structural characteristics of the main power MOS tube unit 120 .

[0077] The high-voltage linear source output circuit control method in the embodiment of the present application is implemented based on the above-mentioned high-voltage linear source output circuit. The high-voltage linear source output circuit has been described in detail above and will not be repeated here.

[0078] The above-mentioned main MOS tube inter-electrode measured voltage is acquired by the MOS tube voltage difference detection unit 150 .

[0079] The above-mentioned MOS tube linear working preset voltage is determined according to the electrical structural characteristics of the main power MOS tube unit 120. The main power MOS tube unit 120 uses different types of MOS tubes and has different electrical structural characteristics, that is, it is necessary to maintain the voltage between the source and the drain of the MOS tube at a suitable voltage difference so that the MOS tube can work in the linear working area. In the embodiment of the present application, the result of the smaller voltage between the source and the drain of the MOS tube is preferred, and the MOS tube only needs to be operated in the linear working area, thereby effectively reducing the power consumption of the MOS tube. In some embodiments, the voltage between the source and the drain of the MOS tube can be maintained at 30V according to the model of the MOS tube.

[0080] The above-mentioned bus voltage preset value can be used to adjust the bus feedback voltage output by the bus voltage control unit 160. The bus voltage preset value is mainly determined according to the actual measured voltage between the electrodes of the main MOS tube and the linear working preset voltage of the MOS tube. The linear working preset voltage of the MOS tube is an ideal state. In actual operation, it may be impossible to maintain the voltage between the drain and the source of the MOS tube at the linear working preset voltage of the MOS tube. At this time, the bus voltage preset value can be corrected by detecting the actual measured voltage between the electrodes of the main MOS tube and using the actual measured voltage between the electrodes of the main MOS tube, thereby avoiding the situation where the MOS tube cannot work in the linear region due to the voltage between the drain and the source being too low.

[0081] The above-mentioned bus voltage preset value is converted from digital to analog and then outputs the corresponding voltage to the bus voltage control unit 160, so that the bus voltage control unit 160 can adjust the bus feedback voltage at the output voltage regulation end according to the bus voltage at the bus voltage output end and the voltage corresponding to the bus voltage preset value, so as to adjust the bus voltage so that the voltage between the drain and the source of the main power MOS tube unit 120 can be maintained at the MOS tube linear working preset voltage as much as possible.

[0082] In some implementations, when the high-voltage linear source output circuit operates in a constant voltage mode, determining a preset bus voltage value according to the measured voltage between the electrodes of the main MOS tube and the preset linear operation voltage of the MOS tube includes:

[0083] Determine a preset intermediate value of the bus voltage according to a preset output voltage value and a preset linear working voltage of the MOS tube;

[0084] Determine the preset adjustment value of the bus voltage according to the measured voltage between the electrodes of the main MOS tube and the preset linear working voltage of the MOS tube;

[0085] The bus voltage preset value is obtained according to the bus voltage preset intermediate value and the bus voltage preset adjustment value.

[0086] In this embodiment, the high-voltage linear source output circuit operates in a constant voltage mode. At this time, the output voltage at the power supply output end is determined by the constant voltage control unit 140, that is, it is determined by the output voltage preset value, and then a bus voltage preset intermediate value can be directly determined using the output voltage preset value and the MOS tube linear working preset voltage. Further considering the errors existing in the late electronic device itself, the bus voltage preset adjustment value is determined using the main MOS tube inter-electrode measured voltage and the MOS tube linear working preset voltage. Finally, the bus voltage preset intermediate value is corrected using the bus voltage preset adjustment value to obtain the final bus voltage preset value.

[0087] The above-mentioned method of determining the preset intermediate value of the bus voltage based on the preset output voltage value and the preset linear working voltage of the MOS tube can first obtain the digital quantity corresponding to the preset linear working voltage of the MOS tube, and then use the digital quantity and the preset output voltage value to perform an addition operation to obtain the preset intermediate value of the bus voltage.

[0088] The bus voltage preset adjustment value is determined according to the actual measured voltage between the electrodes of the main MOS tube and the preset linear working voltage of the MOS tube. After obtaining the digital quantity corresponding to the preset linear working voltage of the MOS tube and the digital quantity corresponding to the actual measured voltage between the electrodes of the main MOS tube, a subtraction operation is performed to obtain the preset bus voltage adjustment value.

[0089] The bus voltage preset value is obtained according to the bus voltage preset intermediate value and the bus voltage preset adjustment value, and the bus voltage preset intermediate value and the bus voltage preset adjustment value can be directly added to obtain the bus voltage preset value. The bus voltage preset value can be converted into a corresponding voltage by a digital-to-analog conversion unit and then output to the bus voltage control unit 160 to complete voltage adjustment.

[0090] In some implementations, when the high-voltage linear source output circuit operates in a constant current mode, determining a preset bus voltage value according to the measured voltage between the electrodes of the main MOS tube and the preset linear operation voltage of the MOS tube includes:

[0091] Determine a preset intermediate value of the bus voltage according to the power supply output voltage and the MOS tube linear working preset voltage;

[0092] Determine the preset adjustment value of the bus voltage according to the measured voltage between the electrodes of the main MOS tube and the preset linear working voltage of the MOS tube;

[0093] The bus voltage preset value is obtained according to the bus voltage preset intermediate value and the bus voltage preset adjustment value.

[0094] In this embodiment, the high-voltage linear source output circuit operates in a constant current mode. At this time, the power supply output voltage at the power supply output end is determined by the load. If the load changes, the power supply output voltage will change. Then, a bus voltage preset intermediate value can be directly determined using the sampling result of the power supply output voltage and the MOS tube linear working preset voltage. Further considering the errors existing in the late electronic device itself, the bus voltage preset adjustment value is determined using the main MOS tube inter-electrode measured voltage and the MOS tube linear working preset voltage. Finally, the bus voltage preset adjustment value is used to correct the bus voltage preset intermediate value, thereby obtaining the final bus voltage preset value.

[0095] The preset intermediate value of the bus voltage is determined according to the power supply output voltage and the MOS tube linear working preset voltage. The digital quantity corresponding to the sampling result of the power supply output voltage can be obtained first, and then the digital quantity corresponding to the MOS tube linear working preset voltage can be obtained. Then, the digital quantity corresponding to the MOS tube linear working preset voltage and the digital quantity corresponding to the sampling result of the power supply output voltage are added to obtain the preset intermediate value of the bus voltage.

[0096] The bus voltage preset adjustment value is determined according to the actual measured voltage between the electrodes of the main MOS tube and the preset linear working voltage of the MOS tube. After obtaining the digital quantity corresponding to the preset linear working voltage of the MOS tube and the digital quantity corresponding to the actual measured voltage between the electrodes of the main MOS tube, a subtraction operation is performed to obtain the preset bus voltage adjustment value.

[0097] The bus voltage preset value is obtained according to the bus voltage preset intermediate value and the bus voltage preset adjustment value, and the bus voltage preset intermediate value and the bus voltage preset adjustment value can be directly added to obtain the bus voltage preset value. The bus voltage preset value can be converted into a corresponding voltage by a digital-to-analog conversion unit and then output to the bus voltage control unit 160 to complete voltage adjustment.

[0098] refer to Figure 6 The embodiment of the present application further provides a high-voltage linear source output circuit control device, the high-voltage linear source output circuit control device comprising:

[0099] The inter-electrode voltage acquisition module is used to obtain the measured inter-electrode voltage of the main MOS tube;

[0100] The bus voltage preset module is used to determine the bus voltage preset value according to the measured voltage between the main MOS tube electrodes and the MOS tube linear working preset voltage;

[0101] A bus voltage regulating module, used for outputting a voltage corresponding to a preset bus voltage value to the bus voltage control unit 160, so that the bus voltage control unit 160 adjusts the bus feedback voltage at the output voltage regulating end according to the bus voltage at the bus voltage output end and the voltage corresponding to the preset bus voltage value, so as to adjust the bus voltage;

[0102] The MOS tube linear operation preset voltage is determined according to the electrical structural characteristics of the main power MOS tube unit 120 .

[0103] The embodiment of the present application also provides a power supply, including the high-voltage linear source output circuit as described above. Because the high-voltage linear source output circuit described above is applied, the beneficial effects brought by the high-voltage linear source output circuit described above are obtained, which will not be described in detail here.

[0104] The high-voltage linear source output circuit control device in the embodiment of the present application can be an electronic device, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal, or it can be other devices other than a terminal. Exemplarily, the electronic device can be a mobile phone, a tablet computer, a laptop computer, a PDA, a car-mounted electronic device, a mobile Internet device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR) / virtual reality (VirtUal reality, VR) device, a robot, a wearable device, an ultra-mobile personal computer (Ultra-mobile per Sonal Computer, UMPC), a netbook or a personal digital assistant (per Sonal digital asSiStant, PDA), etc., and can also be a server, a network attached storage (Network AttaChed Storage, NAS), a personal computer (per Sonal Computer, PC), a television (teleViSion, tV), a teller machine or a self-service machine, etc., which is not specifically limited in the embodiment of the present application.

[0105] The embodiment of the present application also provides an electronic device, including: a processor and a memory storing computer program instructions; when the processor executes the computer program instructions, the high-voltage linear source output circuit control method as described above is implemented. The source meter provided in the embodiment of the present application can implement each process implemented in the embodiment of the high-voltage linear source output circuit control method described above, and achieve the same beneficial effects, so to avoid repetition, it will not be described here.

[0106] An embodiment of the present application also provides a computer-readable storage medium, which stores computer-executable instructions. The computer-executable instructions are executed by a processor or a control module, so that the above-mentioned processor can execute the high-voltage linear source output circuit control method in the above-mentioned embodiment, for example, execute the method described above.

[0107] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0108] The functional blocks shown in the above structural block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier. "Machine-readable medium" may include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0109] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0110] Aspects of the present disclosure are described above with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the functions / actions specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0111] The above are only specific implementation methods of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A high voltage linear source output circuit, characterized in that: include: A primary voltage regulating unit, comprising a primary voltage input terminal, a bus voltage output terminal and an output voltage regulating terminal, wherein the primary voltage input terminal is used to input a working voltage, and the primary voltage regulating unit is used to adjust the bus voltage of the bus voltage output terminal according to the bus feedback voltage input by the output voltage regulating terminal; A main power MOS tube unit, whose drain is connected to the bus voltage output terminal and whose source is used as a power output terminal; A constant current control unit, used for collecting the power output current flowing through the power output end, and adjusting the gate voltage of the main power MOS tube unit according to the power output current and the voltage corresponding to the output current preset value; A constant voltage control unit, used for collecting the power output voltage of the power output terminal, and adjusting the gate voltage of the main power MOS tube unit according to the power output voltage and the voltage corresponding to the preset output voltage value; A MOS tube voltage difference detection unit, used to collect the measured voltage between the source and drain of the main power MOS tube unit; A bus voltage control unit, used for collecting the bus voltage of the bus voltage output terminal, and adjusting the bus feedback voltage of the output voltage regulating terminal according to the bus voltage of the bus voltage output terminal and the voltage corresponding to the bus voltage preset value; A main control unit is used to obtain the output current preset value, the output voltage preset value, and the bus voltage preset value, and output the voltage corresponding to the output current preset value to the constant current control unit, output the voltage corresponding to the output voltage preset value to the constant voltage control unit, and output the voltage corresponding to the bus voltage preset value to the bus voltage control unit; wherein the bus voltage preset value is determined according to the measured voltage between the electrodes of the main MOS tube and the MOS tube linear working preset voltage, and the MOS tube linear working preset voltage is determined according to the electrical structure characteristics of the main power MOS tube unit.

2. The high voltage linear source output circuit according to claim 1, characterized in that: The high voltage linear source output circuit further includes: An overvoltage protection unit is connected between the MOS tube pressure difference detection unit and the output voltage regulation end, and is used to adjust the bus feedback voltage of the output voltage regulation end according to the actual measured voltage between the electrodes of the main MOS tube and the overvoltage protection preset voltage, and the overvoltage protection preset voltage is greater than the MOS tube linear working preset voltage.

3. The high voltage linear source output circuit according to claim 2, characterized in that: The main power MOS tube unit is composed of at least one MOS tube.

4. A high voltage linear source output circuit control method, characterized in that: Applied to the high-voltage linear source output circuit according to any one of claims 1 to 3, the high-voltage linear source output circuit control method comprises: Obtaining the measured voltage between the electrodes of the main MOS tube; Determine a preset value of the bus voltage according to the measured voltage between the electrodes of the main MOS tube and the preset linear working voltage of the MOS tube; Outputting the voltage corresponding to the preset bus voltage value to a bus voltage control unit, so that the bus voltage control unit adjusts the bus feedback voltage of the output voltage regulating end according to the bus voltage at the bus voltage output end and the voltage corresponding to the preset bus voltage value, so as to adjust the bus voltage; The preset linear working voltage of the MOS tube is determined according to the electrical structural characteristics of the main power MOS tube unit.

5. The high voltage linear source output circuit control method according to claim 4, characterized in that: When the high-voltage linear source output circuit operates in a constant voltage mode, determining the preset value of the bus voltage according to the measured voltage between the electrodes of the main MOS tube and the preset linear working voltage of the MOS tube includes: Determine a preset intermediate value of the bus voltage according to the preset output voltage value and the preset linear working voltage of the MOS tube; Determine a preset adjustment value of the bus voltage according to the measured voltage between the electrodes of the main MOS tube and the preset linear working voltage of the MOS tube; The bus voltage preset value is obtained according to the bus voltage preset intermediate value and the bus voltage preset adjustment value.

6. The high voltage linear source output circuit control method according to claim 4, characterized in that: When the high-voltage linear source output circuit operates in a constant current mode, determining the preset value of the bus voltage according to the measured voltage between the electrodes of the main MOS tube and the preset linear working voltage of the MOS tube includes: Determine a preset intermediate value of the bus voltage according to the power supply output voltage and the preset linear working voltage of the MOS tube; Determine a preset adjustment value of the bus voltage according to the measured voltage between the electrodes of the main MOS tube and the preset linear working voltage of the MOS tube; The bus voltage preset value is obtained according to the bus voltage preset intermediate value and the bus voltage preset adjustment value.

7. A high voltage linear source output circuit control device, characterized in that: Applicable to the high-voltage linear source output circuit according to any one of claims 1 to 3, the high-voltage linear source output circuit control device comprises: An inter-electrode voltage acquisition module, used to obtain the measured inter-electrode voltage of the main MOS tube; A bus voltage preset module, used to determine a bus voltage preset value according to the measured voltage between the electrodes of the main MOS tube and the MOS tube linear working preset voltage; A bus voltage regulating module, used for outputting the voltage corresponding to the preset bus voltage value to a bus voltage control unit, so that the bus voltage control unit adjusts the bus feedback voltage of the output voltage regulating end according to the bus voltage at the bus voltage output end and the voltage corresponding to the preset bus voltage value, so as to adjust the bus voltage; The preset linear working voltage of the MOS tube is determined according to the electrical structural characteristics of the main power MOS tube unit.

8. An electronic device, characterized in that: The electronic device comprises a processor and a memory storing computer program instructions; When the processor executes the computer program, the high-voltage linear source output circuit control method according to any one of claims 4 to 6 is implemented.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the high-voltage linear source output circuit control method according to any one of claims 4 to 6.

10. A power supply, characterized in that: It comprises the high voltage linear source output circuit as claimed in any one of claims 1 to 3.

Images