Symbol power tracking power supply modulator and modulation method thereof

Abstract

The invention provides a symbol power tracking power supply modulator and a modulation method thereof, which can be applied to the technical field of power supply modulation. The power supply modulator comprises a master converter circuit, a slave converter circuit, a dynamic control circuit and a coupling switch circuit, the master converter circuit is electrically connected with the slave converter circuit through the coupling switch circuit, and the master converter circuit is connected with an output node of the power supply modulator; wherein the dynamic control circuit is used for controlling the slave converter circuit to output slave ripple current under the condition that the power supply modulator is in a first working state, and controlling the coupling switch circuit to enable the slave ripple current to be added with the master ripple current at an output node; the slave ripple current and the main ripple current output by the main converter circuit are equal in size and have opposite phases, and under the condition that the power supply modulator is in the second working state, the slave converter circuit is disconnected from the main converter circuit by controlling the coupling switch circuit.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power supply modulation, and more specifically, to a sign power tracking power supply modulator and a modulation method thereof. Background Art

[0002] The sign power tracking power modulator can dynamically adjust the power supply voltage of the power amplifier to track the envelope changes of the RF signal. The sign power tracking power modulator in the related art usually uses a large load capacitor to ensure the output ripple current in the steady state. The dynamic step response under the large load capacitor requires a huge amount of charge, so the dynamic step response in a short time will require a larger average current, which increases the difficulty of implementing the sign power tracking power modulator and reduces the reliability of the sign power tracking power modulator. Summary of the invention

[0003] In view of this, the present disclosure provides a sign power tracking power modulator and a modulation method thereof.

[0004] One aspect of the present disclosure provides a sign power tracking power modulator, comprising a master converter circuit, a slave converter circuit, a dynamic control circuit and a coupling switch circuit, wherein the master converter circuit is electrically connected to the slave converter circuit via the coupling switch circuit, and the master converter circuit is connected to an output node of the power modulator;

[0005] Among them, the above-mentioned dynamic control circuit is used to control the output of the slave ripple current from the above-mentioned slave converter circuit when the above-mentioned power modulator is in the first working state, and to control the above-mentioned coupling switch circuit so that the above-mentioned slave ripple current is added to the above-mentioned main ripple current at the output node, and the above-mentioned slave ripple current is equal to the main ripple current output from the above-mentioned main converter circuit and has an opposite phase. When the above-mentioned power modulator is in the second working state, the above-mentioned slave converter circuit is disconnected from the above-mentioned main converter circuit by controlling the above-mentioned coupling switch circuit.

[0006] According to an embodiment of the present disclosure, the coupling switch circuit includes a first switch, a second switch and a first capacitor, the first end of the first switch is connected to the main converter circuit, the second end of the first switch is connected to the first end of the first capacitor, the second end of the first capacitor is connected to the slave converter circuit, the first end of the second switch is connected to the second end of the first switch, and the second end of the second switch is connected to the input voltage.

[0007] According to an embodiment of the present disclosure, the above-mentioned dynamic control circuit is used to control the above-mentioned first switch to be in a closed state and the above-mentioned second switch to be in an open state when the above-mentioned power supply modulator is in the above-mentioned first working state, and to add the above-mentioned slave ripple current to the above-mentioned main ripple current at the above-mentioned output node through the above-mentioned first capacitor.

[0008] According to an embodiment of the present disclosure, the above-mentioned dynamic control circuit is used to control the above-mentioned first switch to be in an open state and the above-mentioned second switch to be in a closed state when the above-mentioned power supply modulator is in the above-mentioned second working state, so that the above-mentioned slave converter circuit is disconnected from the above-mentioned master converter circuit, and adjust the voltage state of the above-mentioned first capacitor through the above-mentioned slave converter circuit.

[0009] According to an embodiment of the present disclosure, the master converter circuit includes a first control switch group and a first inductor, and the slave converter circuit includes a second control switch group and a second inductor.

[0010] According to an embodiment of the present disclosure, the dynamic control circuit is used to control the switching timing of the first control switch group and the second control switch group when the power modulator is in the first working state, so that the main ripple current in the first inductor and the slave ripple current in the second inductor are equal in magnitude and have opposite phases; when the power modulator is in the second working state, the dynamic control circuit is used to control the switching timing of the first control switch group and the second control switch group so that the slave converter circuit adjusts the voltage of the first capacitor.

[0011] According to an embodiment of the present disclosure, the above-mentioned dynamic control circuit includes a control subcircuit and a driving subcircuit, wherein the above-mentioned control subcircuit is used to generate a control signal, and the above-mentioned driving subcircuit is used to control the operation of the above-mentioned main converter circuit, the above-mentioned slave converter circuit and the above-mentioned coupling switch circuit according to the above-mentioned control signal.

[0012] According to an embodiment of the present disclosure, the master converter circuit is used to provide a DC current to a load, and the DC current of the slave converter circuit is 0.

[0013] According to an embodiment of the present disclosure, the first working state is a steady-state working state, and the second working state is a dynamic response working state.

[0014] Another aspect of the present disclosure provides a control method using the power modulator as described above, wherein the power modulator includes a master converter circuit, a slave converter circuit, a dynamic control circuit and a coupling switch circuit, the master converter circuit is connected to the slave converter circuit via the coupling switch circuit, the master converter circuit is connected to an output node of the power modulator, and the method includes:

[0015] When the modulator is in the first working state, the coupling switch circuit is controlled by the dynamic control circuit so that the slave ripple current is added to the main ripple current at the output node, wherein the main ripple current is output by the main converter circuit under the control of the dynamic control circuit, the slave ripple current is output by the slave converter circuit under the control of the dynamic control circuit, and the main ripple current and the slave ripple current are in opposite phases;

[0016] When the modulator is in the second working state, the coupling switch circuit is controlled by the dynamic control circuit to disconnect the slave converter circuit from the master converter circuit.

[0017] According to the embodiments of the present disclosure, based on the inductor post-type DC-DC converter, a reverse ripple current is injected from the converter circuit, thereby reducing the current ripple output by the power modulator in the first working state, reducing the load capacitance by more than ten times, and still maintaining the characteristic of low output ripple. Compared with the traditional inductor post-type DC-DC converter, the dynamic response speed can be greatly improved, no additional current path is required, and the efficiency is high. At the same time, the main converter circuit and the slave converter circuit can also be disconnected to prevent the slave converter circuit from affecting the operation of the main converter in the second working state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0019] Figure 1A Schematically shows a circuit diagram and waveform diagram of a post-inductor DC-DC converter in the related art;

[0020] Figure 1B Schematically shows a circuit diagram and waveform diagram of a capacitor separation type DC-DC converter in the related art;

[0021] Figure 2 A schematic diagram of a sign power tracking power modulator according to an embodiment of the present disclosure is schematically shown;

[0022] Figure 3 A circuit diagram of a sign power tracking power modulator according to an embodiment of the present disclosure is schematically shown;

[0023] Figure 4 The circuit diagram of the 0-2 times conversion ratio sign power tracking power modulator according to an embodiment of the present disclosure is schematically shown;

[0024] Figure 5AThe equivalent circuit diagram of the 0-2 times conversion ratio sign power tracking power modulator in steady state operation according to an embodiment of the present disclosure is schematically shown;

[0025] Figure 5B The equivalent circuit diagram of the 0-2 times conversion ratio sign power tracking power modulator in the case of dynamic response operation according to an embodiment of the present disclosure is schematically shown; and

[0026] Figure 6 The flowchart of the control method of the power modulator according to the embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0027] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0028] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0029] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0030] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0031] In the embodiments of the present disclosure, the collection, updating, analysis, processing, use, transmission, provision, disclosure, storage, etc. of the data involved (for example, including but not limited to user personal information) are in compliance with the provisions of relevant laws and regulations, are used for legitimate purposes, and do not violate public order and good morals. In particular, necessary measures are taken for user personal information to prevent illegal access to user personal information data and maintain the security of user personal information and network security.

[0032] In the embodiments of the present disclosure, the user's authorization or consent is obtained before obtaining or collecting the user's personal information.

[0033] In the related art, the sign power tracking power modulator increases the capacitor charging time by precharging or lagging the load capacitor, which can reduce the average current required by the load capacitor. However, the implementation method of extending the charging time requires an additional current path, which increases the area of ​​off-chip components and reduces the efficiency of the sign power tracking power modulator. At the same time, the shortest charging time limits the switching frequency of the sign power tracking power modulator, limiting the application of the sign power tracking power modulator in higher frequency bands.

[0034] As 5G communication speeds continue to increase, the requirements for the speed of change of the power supply voltage of the RF amplifier are getting higher and higher. Therefore, how to achieve fast dynamic step response speed based on the existing DC-DC converter has become a research hotspot in recent years. Since the large load capacitor has a huge charge demand in the dynamic step response, it is difficult to complete it in a short time. Therefore, existing research mainly focuses on how to extend the charging time of the capacitor to reduce the charging current, but the increase in charging time limits the application of symbol tracking power modulators to higher frequencies.

[0035] Figure 1A The circuit diagram and waveform diagram of a post-inductor DC-DC converter in the related art are schematically shown in FIG.

[0036] like Figure 1A The inductor post-type DC-DC converter shown is a three-level boost-buck DC-DC converter, and its steady-state ripple can be expressed as:

[0037] (1)

[0038] Figure 1A The average value of the inductor current during the dynamic response of the converter shown can be expressed as:

[0039] (2)

[0040] Where V in is the input voltage, V OUT1 、V OUT2is the value of the output voltage at different times, L is the inductance value, D represents the duty cycle of the power tube control signal, D<1, T is the switching cycle of the converter, DT represents the on-time of the power tube per cycle, C L is the size of the load capacitance, T DVS is the time required for dynamic response, I O_AVG is the average value of the load current during this process. From formula (1), we can see that the output ripple is inversely proportional to the load capacitance value. The larger the capacitance, the smaller the ripple. From formula (2), we can see that when the load undergoes a dynamic step response, the larger the capacitance value and the shorter the response time, the larger the average current required to charge the capacitor, which may even be much larger than the average current in the steady state. Figure 1A The converter structure shown cannot simultaneously meet the requirements of small output ripple and small average inductor current during dynamic response, which increases the difficulty in designing a sign power tracking power modulator.

[0041] Figure 1B The circuit diagram and waveform diagram of a capacitor separation DC-DC converter in the related art are schematically shown in FIG.

[0042] like Figure 1B The capacitor splitting DC-DC converter shown splits the load capacitance into a large capacitor C SPT And a small capacitor C L Two parts. In C SPT Below, an auxiliary switch S is added SPT To extend the capacitor charging time. When the dynamic step response comes, S SPT Disconnect, at this time, the load capacitance of the modulator becomes CL, and the required charging current drops significantly. After the output voltage is basically stable, SPT Slightly open, control S SPT A small current I flows SPT C SPT Charging. When C SPT When the lower plate is charged to near ground level, S SPT Fully open, C SPT and C L By connecting them in parallel and working together as load capacitors, the output ripple is reduced in steady state. SPT The charging time is shortened, which reduces the average inductor current in the dynamic response and increases the reliability of the system.

[0043] like Figure 1AAs shown, for the inductor post-type DC-DC converter, during the dynamic response process, the average current value that the inductor needs to provide is extremely high, which is impossible for the inductor. Therefore, the sign power tracking power modulator designed based on the inductor post-type DC-DC converter usually requires an additional current path to replace the inductor to provide the average current during dynamic response. Since this path requires a fast response speed, a resistive path is generally used to implement the additional current path. The design of the resistive path greatly reduces the efficiency of the system. At the same time, since the average current during the response process is too large, its loss on the resistor is reflected as heat on the resistor, reducing the stability and reliability of the system.

[0044] like Figure 1B As shown in the figure, for the capacitor separation sign power tracking power modulator, since C SPT The capacitor charging time is extended and delayed, which can significantly reduce the average current of the inductor and does not require an auxiliary current path. SPT During the charging process, S SPT As a resistive current path, it will still reduce the system efficiency. SPT The length of the charging time determines the hopping frequency of the modulator topology, limiting the application of this structure at higher frequencies.

[0045] In view of this, the present disclosure provides a low-ripple sign power tracking power supply modulator, which greatly reduces the load capacitance without increasing the output ripple, thereby greatly reducing the average current of the inductor. It does not require an auxiliary current path or extend the charging time, and can be used at a higher frequency. At the same time, the circuit can expand its output to any voltage value by changing the topological structure before the inductor, and has scalability.

[0046] An embodiment of the present disclosure provides a sign power tracking power modulator including a main converter circuit, a slave converter circuit, a dynamic control circuit and a coupling switch circuit. The main converter circuit is electrically connected to the slave converter circuit through the coupling switch circuit, and the main converter circuit is connected to the output node of the power modulator; wherein the dynamic control circuit is used to control the output of a slave ripple current from the slave converter circuit when the power modulator is in a first working state, and to control the coupling switch circuit so that the slave ripple current is added to the main ripple current at the output node, and the slave ripple current is equal in magnitude to the main ripple current output from the main converter circuit and has an opposite phase. When the power modulator is in a second working state, the slave converter circuit is disconnected from the main converter circuit by controlling the coupling switch circuit.

[0047] Figure 2 A schematic diagram of a sign power tracking power modulator according to an embodiment of the present disclosure is schematically shown.

[0048] like Figure 2As shown, the sign power tracking power modulator 200 includes a master converter circuit 210, a slave converter circuit 220, a dynamic control circuit 230 and a coupling switch circuit 240, the master converter circuit 210 is electrically connected to the slave converter circuit 220 through the coupling switch circuit 230, and the master converter circuit 210 is connected to the output node of the power modulator 200;

[0049] Among them, the dynamic control circuit 230 is used to control the output of the slave ripple current from the slave converter circuit 220 when the power modulator 200 is in the first working state, and to control the coupling switch circuit 240 so that the slave ripple current is added to the main ripple current at the output node, and the slave ripple current is equal to the main ripple current output from the main converter circuit 210 and has an opposite phase. When the power modulator 200 is in the second working state, the slave converter circuit 220 is disconnected from the main converter circuit 210 by controlling the coupling switch circuit 240.

[0050] According to an embodiment of the present disclosure, the main converter circuit can regulate the output voltage and provide a DC value of the output current to the load.

[0051] According to an embodiment of the present disclosure, when the power modulator is in the first working state, the slave converter circuit can generate a slave ripple current. The slave ripple current generated by the slave converter circuit is opposite in phase to the main ripple current generated by the main converter circuit. When the slave ripple current is added to the output node, it can complement the main current ripple of the output of the main converter circuit, thereby reducing the ripple current output by the power modulator.

[0052] According to an embodiment of the present disclosure, the coupling switch circuit can inject the slave ripple current of the slave converter circuit into the output node. At the same time, when the power modulator is in the second working state, the reverse current of the slave converter circuit will reduce the charging speed of the power modulator to the load capacitance. Therefore, the coupling switch circuit can also disconnect the slave converter circuit from the main converter circuit to achieve a fast response.

[0053] According to an embodiment of the present disclosure, a dynamic control circuit may control the respective actions of a master converter circuit, a slave converter circuit, and a coupling switch circuit.

[0054] According to the embodiments of the present disclosure, based on the inductor post-type DC-DC converter, a reverse ripple current is injected from the converter circuit, thereby reducing the current ripple output by the power modulator in the first working state, reducing the load capacitance by more than ten times, and still maintaining the characteristic of low output ripple. Compared with the traditional inductor post-type DC-DC converter, the dynamic response speed can be greatly improved, no additional current path is required, and the efficiency is high. At the same time, the main converter circuit and the slave converter circuit can also be disconnected to prevent the slave converter circuit from affecting the operation of the main converter in the second working state.

[0055] Figure 3 The circuit diagram of a sign power tracking power modulator according to an embodiment of the present disclosure is schematically shown.

[0056] like Figure 3 As shown, the coupling switch circuit 340 includes a first switch S1, a second switch S2 and a first capacitor C1, the first end of the first switch S1 is connected to the main converter circuit, the second end of the first switch S1 is connected to the first end of the first capacitor C1, the second end of the first capacitor C1 is connected to the slave converter circuit, the first end of the second switch S2 is connected to the second end of the first switch S1, and the second end of the second switch S2 is connected to the input voltage.

[0057] According to an embodiment of the present disclosure, the dynamic control circuit 330 is used to control the first switch S1 to be in a closed state and the second switch S2 to be in an open state when the power modulator is in a first working state, so that the slave ripple current is added to the main ripple current at the output node through the first capacitor C1.

[0058] According to an embodiment of the present disclosure, the dynamic control circuit 330 is used to control the first switch S1 to be in an open state and the second switch S2 to be in a closed state when the power modulator 300 is in the second working state, so that the slave converter circuit 320 is disconnected from the main converter circuit 310, and the voltage state of the first capacitor C1 is adjusted by the slave converter circuit 320.

[0059] According to an embodiment of the present disclosure, the main converter circuit is used to provide a DC current to the load, and the DC current of the slave converter circuit is zero.

[0060] According to an embodiment of the present disclosure, the coupling switch circuit can inject the slave ripple current of the converter circuit into the input node, and the steady-state and dynamic characteristics of the circuit. In order to ensure the normal operation of the slave converter circuit and the DC current is 0, a coupling capacitor is required to isolate the output voltages of the master and slave converters, and two ripple currents with opposite phases can be superimposed through the coupling capacitor, which is the first capacitor.

[0061] According to an embodiment of the present disclosure, the first working state may be a steady-state working state, and the second working state may be a dynamic response working state.

[0062] Figure 4 The circuit diagram of a 0-2 times conversion ratio sign power tracking power modulator according to an embodiment of the present disclosure is schematically shown.

[0063] like Figure 4 As shown, the main converter circuit 410 includes a first control switch group S A1 ~S A5and a first inductor L1, the converter circuit 420 includes a second control switch group S B1 ~S B5 The dynamic control circuit 430 is used to control the first control switch group S A1 ~S A5 and the second control switch group S B1 ~S B5 The switching timing is such that the main ripple current in the first inductor L1 and the slave ripple current in the second inductor L2 are equal in magnitude and have opposite phases. The dynamic control circuit 430 includes a control subcircuit 431 and a drive subcircuit 432, wherein the control subcircuit 431 is used to generate a control signal, and the drive subcircuit 432 is used to control the operation of the main converter circuit 410, the slave converter circuit 420 and the coupling switch circuit 440 according to the control signal.

[0064] According to an embodiment of the present disclosure, the first control switch group S A1 ~S A5 Used to control the first inductor L1, the second control switch group S B1 ~S B5 In the case of a steady-state operation state, the control signal S generated by the control subcircuit for controlling the main converter circuit is A and a control signal S for controlling the slave converter circuit B is a pair of complementary control signals. After inputting into the driving sub-circuit, the driving sub-circuit responds to the control signal S A and S B Control the first control switch group S A1 ~S A5 and the second control switch group S B1 ~S B5 The two sets of control switch groups are also completely complementary. The first switch S1 of the coupling switch circuit is turned on, and the second switch S2 is turned off. The two-phase filter inductors achieve complementary working states through complementary control signals, and then the output ripple can be reduced by matching the current slope between the two inductors. Therefore, under the premise of consistent output ripple magnitude, the load capacitor C of the power stage circuit L The value can be much smaller than the load capacitance of an ordinary DC-DC converter.

[0065] According to an embodiment of the present disclosure, the power modulator may further include a dynamic detection part and a control loop part. The dynamic detection may send a detection signal (Tran Detected) for detecting whether the power modulator needs to respond, and the control loop may send a pulse width modulation signal (Pulse Width Modulation, PWM).

[0066] Figure 5AThe equivalent circuit diagram of the 0-2 times conversion ratio sign power tracking power modulator in steady state operation according to an embodiment of the present disclosure is schematically shown.

[0067] like Figure 5A As shown, when the power modulator is in steady-state operation, the two-phase inductors work in completely opposite directions. At this time, the first inductor L1 is magnetized and the second inductor L2 is demagnetized. The slopes of the respective inductor currents are:

[0068] (3)

[0069] (4)

[0070] When the power modulator is in steady-state operation, it is hoped that the current slopes of the two inductors are complementary, that is, From equations (3) and (4), we can get V C =V IN -V OUT At this time, the two-phase inductor currents complement each other, and the total output current of the topology is almost ripple-free. Therefore, the load capacitance can be greatly reduced without affecting the output ripple. Figure 5A As shown. After reducing the output capacitance by ten times, this topology can still meet the output ripple level comparable to the traditional solution. At the same time, from (2), it can be obtained that the average value of the required inductor current is reduced by ten times when the power modulator is in a dynamic response working state. Therefore, the dynamic current demand can be met without using an auxiliary current path or complex delayed charging logic.

[0071] Figure 5B The equivalent circuit diagram of the 0-2 times conversion ratio sign power tracking power modulator in dynamic response operation according to an embodiment of the present disclosure is schematically shown.

[0072] like Figure 5B As shown, when the power modulator is in a dynamic response working state, the control switch S3 is disconnected and S4 is turned on, so that the two-phase inductance can be disconnected, the complementary effect of the two-phase inductance on the output current can be released, and the inductance and capacitance in the main converter circuit and the slave converter circuit can be controlled separately to achieve fast and stable dynamic response.

[0073] When the dynamic response occurs, the output voltage needs to be increased from V OUT1 Quickly jump to V OUT2 At this time, the negative inductor current slope k of L2 L2 Will reduce C L At the same time, during the dynamic response process, V C It is also necessary to IN -V OUT1 Change to V IN-V OUT2 At this time, the first switch S1 is turned off, the second switch S2 is turned on, and L2 to C L The current path is disconnected, and only the first inductor L1 provides current to C L Stable at V OUT2 At L The charging slope is from k L1 + k L2 Transform to k L1 , which improves C L At the same time, the second inductor L2 changes the voltage difference of the first capacitor C1 from V IN -2V OUT1 Stable to V IN -2V OUT2 , to prepare for the voltage of the first capacitor C1 in the subsequent steady state. After the two capacitors are stable, the first switch S1 is turned on again and the second switch S2 is turned off to achieve the inductor current complementary function in the steady state.

[0074] When the dynamic control circuit responds dynamically, the dynamic control signal Tran_EN switches to a high level, and the driving circuit disconnects the first switch S1 and turns on the second switch S2. A1 ~S A2 Switch reverse S B1 ~S B2 The switch is controlled by V C Voltage independent control S B1 ~S B2 The first switch S1 is turned on, the second switch S2 is turned off, and the second inductor L2 controls the voltage of the first capacitor C1. B1 ~S B2 The control signal of the switch is switched back to S A1 ~S A2 Switch reverse.

[0075] According to the embodiment of the present disclosure, when the power modulator is in steady-state operation, the slope of the output current is reduced to approximately 0 through the ripple elimination structure, which greatly reduces the load capacitance C compared with the traditional structure. L The current requirement during dynamic response is reduced, and the load capacitance C can be completed through ordinary single inductor operation. L At the same time, through the mode switching during the dynamic response, the output current slope is increased again during the dynamic state, thus obtaining a fast response speed.

[0076] The symbolic power tracking power modulator proposed in the present disclosure uses a slave converter circuit to provide ripple current, which solves the problem that the traditional structure cannot simultaneously meet the requirements of small output ripple and small average inductor current during dynamic response. There is no need for auxiliary current paths and slow charging control, which improves the efficiency of the system and provides the possibility for the application of the modulator at higher frequencies. In addition, in order to solve the problem of reducing the output charging speed due to the reverse current of the slave converter circuit, a new control switch and control logic are designed to separate the slave converter circuit from the main converter circuit when a dynamic response occurs. By reconstructing the ripple elimination topology, the output current slope of the power modulator is further improved.

[0077] The electrical modulator proposed in the present disclosure can be applied to a sign power tracking power modulator of any conversion ratio, and only the switch capacitor topology in the power stage needs to be changed. The slave converter circuit proposed in the present disclosure can be implemented using different methods, such as a small inductor or a linear regulator structure operating at a higher frequency, and only the topology of the slave converter circuit needs to be changed. The present disclosure has fast dynamic response capability, a wide range of applications, and scalability. The new sign power tracking power modulator designed in the present disclosure greatly reduces the output ripple and output capacitance by using ripple elimination technology, so the average current requirement for dynamic response is greatly reduced, the dynamic response efficiency is improved, the control of dynamic response is simplified, and it is conducive to the application of the modulator at a higher frequency; in view of the shortcomings of ripple elimination technology, the control and topology of the modulator are optimized to achieve fast dynamic response; the present invention can be applied to a sign power tracking power modulator of any conversion ratio and has scalability.

[0078] Figure 6 The flowchart of the control method of the power modulator according to the embodiment of the present disclosure is schematically shown.

[0079] like Figure 6 As shown, the power modulator includes a main converter circuit, a slave converter circuit, a dynamic control circuit and a coupling switch circuit, the main converter circuit is connected to the slave converter circuit through the coupling switch circuit, the main converter circuit is connected to the output node of the power modulator, and the method includes operations S610 to S620.

[0080] In operation S610, when the modulator is in the first working state, the coupling switch circuit is controlled by the dynamic control circuit so that the slave ripple current is added to the main ripple current at the output node, wherein the main ripple current is output by the main converter circuit under the control of the dynamic control circuit, and the slave ripple current is output by the slave converter circuit under the control of the dynamic control circuit, and the main ripple current and the slave ripple current are in opposite phases.

[0081] In operation S620 , when the modulator is in the second working state, the coupling switch circuit is controlled by the dynamic control circuit to disconnect the slave converter circuit from the master converter circuit.

[0082] According to an embodiment of the present disclosure, operations S610 to S620 may refer to the description of other embodiments of the present disclosure and will not be repeated here.

[0083] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram may represent a module, a program segment, or a part of a code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box may also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions. It can be understood by those skilled in the art that the features recorded in the various embodiments of the present disclosure can be combined and / or combined in a variety of ways, even if such a combination or combination is not explicitly recorded in the present disclosure. In particular, without departing from the spirit and teaching of the present disclosure, the features described in the various embodiments of the present disclosure may be combined and / or combined in a variety of ways. All of these combinations and / or combinations fall within the scope of the present disclosure.

[0084] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A signed power tracking power modulator, comprising a master converter circuit, a slave converter circuit, a dynamic control circuit and a coupling switch circuit, wherein the master converter circuit is electrically connected to the slave converter circuit through the coupling switch circuit, and the master converter circuit is connected to an output node of the power modulator; in, The dynamic control circuit is used to control the slave converter circuit to output a slave ripple current when the power modulator is in a first working state, and to control the coupling switch circuit so that the slave ripple current is added to the main ripple current at the output node, and the slave ripple current is equal in magnitude to the main ripple current output from the main converter circuit and has an opposite phase. When the power modulator is in a second working state, the coupling switch circuit is controlled to disconnect the slave converter circuit from the main converter circuit.

2. The power modulator according to claim 1, wherein: The coupling switch circuit includes a first switch, a second switch and a first capacitor, wherein a first end of the first switch is connected to the master converter circuit, a second end of the first switch is connected to a first end of the first capacitor, a second end of the first capacitor is connected to the slave converter circuit, a first end of the second switch is connected to a second end of the first switch, and a second end of the second switch is connected to an input voltage.

3. The power modulator according to claim 2, wherein: The dynamic control circuit is used to control the first switch to be in a closed state and the second switch to be in an open state when the power modulator is in the first working state, and to add the slave ripple current to the main ripple current at the output node through the first capacitor.

4. The power modulator according to claim 2, wherein: The dynamic control circuit is used to control the first switch to be in an open state and the second switch to be in a closed state when the power modulator is in the second working state, so as to disconnect the slave converter circuit from the master converter circuit and adjust the voltage state of the first capacitor through the slave converter circuit.

5. The power modulator according to claim 2, wherein: The master converter circuit includes a first control switch group and a first inductor, and the slave converter circuit includes a second control switch group and a second inductor.

6. The power modulator according to claim 5, wherein: The dynamic control circuit is used to control the switching timing of the first control switch group and the second control switch group when the power modulator is in the first working state, so that the main ripple current in the first inductor and the slave ripple current in the second inductor are equal in magnitude and have opposite phases; when the power modulator is in the second working state, control the switching timing of the first control switch group and the second control switch group so that the slave converter circuit adjusts the voltage of the first capacitor.

7. The power modulator according to any one of claims 1 to 5, wherein: The dynamic control circuit includes a control subcircuit and a drive subcircuit, wherein the control subcircuit is used to generate a control signal, and the drive subcircuit is used to control the operation of the master converter circuit, the slave converter circuit and the coupling switch circuit according to the control signal.

8. The power modulator according to any one of claims 1 to 5, wherein: The main converter circuit is used to provide a direct current to a load, and the direct current of the slave converter circuit is zero.

9. The power modulator according to any one of claims 1 to 5, wherein: The first working state is a steady-state working state, and the second working state is a dynamic response working state.

10. A control method using the power modulator according to any one of claims 1 to 9, wherein: The power modulator comprises a master converter circuit, a slave converter circuit, a dynamic control circuit and a coupling switch circuit, wherein the master converter circuit is connected to the slave converter circuit via the coupling switch circuit, and the master converter circuit is connected to an output node of the power modulator, and the method comprises: When the modulator is in the first working state, the coupling switch circuit is controlled by the dynamic control circuit so that the slave ripple current is added to the main ripple current at the output node, wherein the main ripple current is output by the main converter circuit under the control of the dynamic control circuit, the slave ripple current is output by the slave converter circuit under the control of the dynamic control circuit, and the main ripple current and the slave ripple current are in opposite phases; When the modulator is in the second working state, the coupling switch circuit is controlled by the dynamic control circuit to disconnect the slave converter circuit from the master converter circuit.

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