Sign power tracking power supply modulator and modulation method thereof

Abstract

The present disclosure provides a sign-power tracking power modulator and a modulation method thereof, which can be applied to the field of power modulation technology. 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 electrically connected to the slave converter circuit via the coupling switch circuit, and the master converter circuit is connected to the output node of the power modulator. The dynamic control circuit is configured to, when the power modulator is in a first operating state, control the slave converter circuit to output a slave ripple current, and control the coupling switch circuit so that the slave ripple current is added to the master ripple current at the output node, so that the slave ripple current is equal in magnitude and has an opposite phase to the master ripple current output from the master converter circuit. When the power modulator is in a second operating state, the coupling switch circuit is controlled to disconnect the slave converter circuit from the master converter circuit.

Description

Technical Field

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

[0002] A sign-power tracking power modulator dynamically adjusts the power supply voltage of a power amplifier to track the envelope changes of the RF signal. Related art sign-power tracking power modulators typically use large load capacitors to ensure stable output ripple current. However, dynamic step responses with large load capacitors require a large amount of charge, resulting in a larger average current in a short period of time. This increases the implementation difficulty of sign-power tracking power modulators and reduces their reliability. 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] The dynamic control circuit is configured to control the slave converter circuit to output a slave ripple current, and to control the coupling switch circuit, when the power modulator is in the first working state, so that the slave ripple current is added to the main ripple current at the output node. 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 the second working state, the coupling switch circuit is controlled to disconnect the slave converter circuit from the main converter 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 master 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 master 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, 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. The method includes:

[0015] When the modulator is in a first operating state, the coupling switch circuit is controlled by the dynamic control circuit so that a slave ripple current is added to a master ripple current at the output node, wherein the master ripple current is output by the master 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 master ripple current and the slave ripple current have 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 an embodiment of the present disclosure, based on a post-inductor DC-DC converter, a reverse ripple current is injected into a slave converter circuit, thereby reducing the current ripple output by the power modulator in the first operating state, reducing the load capacitance by more than ten times while still maintaining the low output ripple characteristic. Compared with a traditional post-inductor DC-DC converter, the dynamic response speed can be significantly improved, no additional current path is required, and efficiency is high. At the same time, the main converter circuit and the slave converter circuit can be disconnected to prevent the slave converter circuit from affecting the operation of the main converter in the second operating 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 Schematically shows a schematic diagram of a sign power tracking power modulator according to an embodiment of the present disclosure;

[0022] Figure 3 Schematically shows a circuit diagram of a sign power tracking power modulator according to an embodiment of the present disclosure;

[0023] Figure 4 Schematically shows a circuit diagram of a 0-2 times conversion ratio sign power tracking power modulator according to an embodiment of the present disclosure;

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

[0025] Figure 5B Schematically shows an equivalent circuit diagram of a 0-2 times conversion ratio sign power tracking power modulator in a dynamic response operation according to an embodiment of the present disclosure; 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 merely exemplary and are not intended to limit the scope of the present disclosure. In the detailed description below, 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 well-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 presence of the features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0029] All terms used herein (including technical and scientific terms) 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 expressions such as "at least one of A, B, and C, etc." are used, they should generally be interpreted in accordance with the meaning 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 this disclosure, the collection, updating, analysis, processing, use, transmission, provision, disclosure, and storage of all data involved (including, but not limited to, user personal information) comply with relevant laws and regulations, are used for legitimate purposes, and do not violate public order and good morals. In particular, necessary measures have been taken to prevent unauthorized access to user personal information 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 related technologies, the sign power tracking power modulator increases the capacitor charging time by precharging or lagging the load capacitor, thereby reducing 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 demand for faster voltage changes in RF amplifiers is increasing. Therefore, achieving fast dynamic step response speeds within existing DC-DC converters has become a research hotspot in recent years. Because large load capacitors require a significant amount of charge in a dynamic step response, achieving this charge in a short period of time is difficult. Existing research has primarily focused on extending the capacitor charging time to reduce the charging current. However, this increased charging time limits the application of symbol-tracking power modulators to higher frequencies.

[0035] Figure 1A Schematically shows a circuit diagram and waveform diagram of a post-inductor DC-DC converter in the related art.

[0036] like Figure 1A The post-inductor DC-DC converter shown is a three-level boost-buck DC-DC converter. 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 period of the converter, DT represents the on-time of the power tube per period, 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 time required for the response, the larger the average current required to charge the capacitor, and even much larger than the average current in the steady state. It can be seen that for 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 of designing the sign power tracking power modulator.

[0041] Figure 1B Schematically shows a circuit diagram and waveform diagram of a capacitor separation type DC-DC converter in the related art.

[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, the 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 in the figure, for a post-inductor DC-DC converter, the average current value that the inductor needs to provide during the dynamic response process is extremely high, which is impossible for the inductor. Therefore, a sign power tracking power modulator designed based on a post-inductor 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 significantly reduces the efficiency of the system. At the same time, since the average current during the response process is too large, its loss in the resistor is reflected as heat in 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 extended and delayed charging time of the capacitor can significantly reduce the average current of the inductor and eliminate the need for 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 significantly reduces the load capacitance without increasing the output ripple, thereby significantly reducing the average current of the inductor. It does not require an auxiliary current path or extended charging time, and can be used at higher frequencies. At the same time, the circuit can expand its output to any voltage value by changing the topological structure before the inductor, and is scalable.

[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 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 The figure schematically shows a schematic diagram of a sign power tracking power modulator according to an embodiment of the present disclosure.

[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 via the coupling switch circuit 230. 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 in magnitude and has an opposite phase to the main ripple current output from the main converter circuit 210. When the power modulator 200 is in the second working state, the coupling switch circuit 240 is controlled to disconnect the slave converter circuit 220 from the main converter circuit 210.

[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 operating state, the slave converter circuit can generate a slave ripple current. The slave ripple current generated by the slave converter circuit has an opposite phase to the main ripple current generated by the master converter circuit. When the slave ripple current is applied to the output node, it can complement the main current ripple of the output of the master 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 the master converter circuit, the slave converter circuit, and the coupling switch circuit.

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

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

[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 master 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 as to disconnect the slave converter circuit 320 from the master converter circuit 310, and adjust the voltage state of the first capacitor C1 through the slave converter circuit 320.

[0059] According to an embodiment of the present disclosure, the master converter circuit is configured 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, a coupling switch circuit can inject the slave ripple current of the converter circuit into the input node, while improving the steady-state and dynamic characteristics of the circuit. To ensure the normal operation of the slave converter circuit and the DC current is zero, a coupling capacitor is required to isolate the output voltages of the master and slave converters. At the same time, 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 slave 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 optimized to ensure that the master 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. Dynamic control circuit 430 includes a control subcircuit 431 and a driver subcircuit 432. Control subcircuit 431 is configured to generate a control signal, and driver subcircuit 432 is configured to control the operation of master converter circuit 410, slave converter circuit 420, and coupling switch circuit 440 based on 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 and 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 sub-circuit 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 switches are also fully 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 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 capacitance C of the power stage circuit is 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 portion and a control loop portion. The dynamic detection portion may send a detection signal (Tran Detected) to detect whether the power modulator needs to respond, and the control loop portion 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 operate in completely opposite directions. At this time, the first inductor L1 is magnetized and the second inductor L2 is demagnetized. The slopes of their 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 in Figure 2. Even with a tenfold reduction in output capacitance, this topology can still achieve an output ripple level comparable to that of conventional solutions. Furthermore, from (2), the average value of the required inductor current is reduced tenfold when the power modulator is in dynamic response mode. Therefore, the dynamic current requirement can be met without the use of auxiliary current paths 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 the dynamic response working state, the control switch S3 is disconnected and S4 is turned on, which can disconnect the two-phase inductors and eliminate the complementary effect of the two-phase inductors on the output current. The inductors and capacitors in the main converter circuit and the slave converter circuit are controlled separately to achieve fast and stable dynamic response.

[0073] When the dynamic response occurs, the output voltage needs to be 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 Also need to start from V 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 C L The charging slope is from k L1 + k L2 Transformed 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 , preparing 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. At this time, the driving circuit turns off 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 switch realizes the control of the voltage of the first capacitor C1 by the second inductor L2. When the dynamic control signal Tran_EN switches back to a low level, the first switch S1 is turned on, the second switch S2 is turned off, and S B1 ~S B2 The control signal of the switch is switched back to S A1 ~S A2 Switch reversed.

[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 ripple level can still be very low under the condition of . The current demand during dynamic response is reduced, and the load capacitance C can be completed through ordinary single inductor operation. L At the same time, by switching the mode during dynamic response, the output current slope is increased again during dynamic response, thus achieving a fast response speed.

[0076] The symbol 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 the reverse current of the slave converter circuit reducing the output charging speed, a new control switch and control logic are designed to separate the slave converter circuit from the main converter circuit when 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, thereby greatly reducing the average current requirement for dynamic response, improving the dynamic response efficiency, simplifying the control of dynamic response, and facilitating the application of the modulator at higher frequencies; 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 is scalable.

[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 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 through the coupling switch circuit. The master converter circuit is connected to the output node of the power modulator. 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 have opposite phases.

[0081] In operation S620 , when the modulator is in the second operating 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 architectures, 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 can represent a module, program segment, or part of the code, which contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the boxes can also occur in an order different from that marked in the accompanying drawings. For example, two boxes shown 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, as well as the combination of boxes in the block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified functions or operations, or can be implemented using a combination of dedicated hardware and computer instructions. It will be understood by those skilled in the art that the features described in the various embodiments of the present disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in the present disclosure. In particular, without departing from the spirit and teachings of the present disclosure, the features described in the various embodiments of the present disclosure may be combined and / or coupled in various ways, and all of these combinations and / or couplings fall within the scope of the present disclosure.

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

Claims

1. 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; in, The dynamic control circuit is configured to, when the power modulator is in a first working state, control the slave converter circuit to output a slave ripple current, and control the coupling switch circuit so that the slave ripple current is added to the master ripple current at the output node, and the slave ripple current is equal in magnitude and has an opposite phase to the master ripple current output from the master converter circuit; and, when the power modulator is in a second working state, disconnect the slave converter circuit from the master converter circuit by controlling the coupling switch circuit; 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 master 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.

2. The power supply modulator according to claim 1, 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 master ripple current at the output node through the first capacitor.

3. The power supply modulator according to claim 1, 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.

4. The power supply modulator according to claim 1, 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.

5. The power supply modulator according to claim 4, wherein: The dynamic control circuit is configured 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; and to control the switching timing of the first control switch group and the second control switch group when the power modulator is in the second working state, so that the slave converter circuit adjusts the voltage of the first capacitor.

6. The power supply modulator according to any one of claims 1 to 4, 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.

7. The power supply modulator according to any one of claims 1 to 4, wherein: The master converter circuit is used to provide a direct current to a load, and the direct current of the slave converter circuit is zero.

8. The power supply modulator according to any one of claims 1 to 4, wherein: The first working state is a steady-state working state, and the second working state is a dynamic response working state.

9. A control method using the power modulator according to any one of claims 1 to 8, 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. The method includes: When the modulator is in the first working state, the coupling switch circuit is controlled by the dynamic control circuit so that a slave ripple current is added to a master ripple current at the output node, wherein the master ripple current is output by the master 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 master ripple current and the slave ripple current have 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.

Images