BUCK conversion circuit, power supply and electronic equipment

Abstract

The utility model provides a BUCK conversion circuit, a power supply and electronic equipment. The circuit comprises a control circuit, a millimeter wave isolator, a high-voltage driving circuit and a voltage output end, the millimeter wave isolator comprises a first transmission channel and a second transmission channel; the high-voltage driving circuit comprises a driving and logic module and a driving part; the control circuit is connected with the driving and logic module through a first transmission channel of the millimeter wave isolator, and the driving and logic module, the driving piece and the voltage output end are connected in sequence; the voltage output end is also in feedback connection with the driving and logic module, and the driving and logic module is connected with the control circuit through a second transmission channel of the millimeter wave isolator. According to the utility model, signal safe isolation and high-speed transmission can be realized, and the risk of short circuit can be effectively avoided; and output / error feedback can be realized, and timeliness and accuracy of loop control are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power electronics, in particular to a BUCK conversion circuit, a power supply and electronic equipment. Background Art

[0002] High-voltage circuits are widely used in our daily lives, such as power supply circuits and motor drive circuits. Fast-charging battery technology used in handheld devices is a classic application of high-voltage circuits.

[0003] A typical high-voltage circuit consists of a low-voltage region and a high-voltage region. The low-voltage region is typically used to generate trigger signals and digital signals; the high-voltage region typically houses high-voltage circuits such as charging circuits, motor circuits, traditional power circuits, or specialized high-voltage devices (GaN, SiC, LDMOS). Signal transmission between the high-voltage and low-voltage regions requires high isolation to prevent the high-voltage region from damaging the low-voltage region. The device that provides this isolation is typically called a switch, isolator, or digital isolator.

[0004] Currently, mainstream isolators such as Figure 1 As shown, these circuits include optocouplers, capacitive coupling, and coil (inductive coupling). However, optocouplers require separate components; capacitive circuits require specialized oxide materials; and coil circuits present issues such as area. Therefore, with the demands of modern high-voltage circuits for fast response times, low latency, and high-bandwidth digital signal processing, the aforementioned three types of circuits are no longer sufficient. Furthermore, modern high-voltage circuits face another stringent requirement: no short circuits after high-voltage damage. Both coil and capacitive isolators present this potential short circuit risk.

[0005] High voltage bridge circuits are particularly used in power supply circuits, especially in DC / DC conversion circuits. In a typical high voltage bridge circuit, such as Figure 2 As shown, the system signal (Input) is input to the controller (Controller), which transmits the isolated signal to the gate driver and logic (Gate Driver and Logic) module, which processes and converts it into the drive signal of the special high-voltage process device (M1 and M2 in the figure).

[0006] Implementing isolated loop control in a high-voltage bridge circuit requires the following conditions: (1) short propagation delay; (2) good electromagnetic interference (EMI) characteristics; and (3) good response characteristics within 10 kHz-10 MHz (the operating frequency range of most power supply chips).

[0007] The typical ISO closed-loop high-voltage bridge circuit in the prior art has the following shortcomings in its isolation solution:

[0008] (1) The isolation speed of the optocoupler is too slow. Its response speed is at the microsecond level, which is greater than its switching cycle and cannot guarantee the accuracy and stability of the output.

[0009] (2) Capacitive coupling isolation is fast and efficient, but the signal and noise share the same transmission channel. This means that the signal frequency must be much greater than the noise frequency to present low signal impedance and high noise impedance. The switching frequency of the high-voltage bridge circuit closed-loop control is much lower than its switching noise frequency. Therefore, the use of capacitive isolation will introduce high-frequency noise from the high-voltage side into the low-voltage side, causing duty cycle interference.

[0010] (3) Inductive isolators can suppress common-mode noise, have high energy efficiency and fast speed, but their electromagnetic interference characteristics are poor; high-voltage bridge circuits generally have high power, and the power tubes are outside the chip, so the electromagnetic interference is large. As a result, the low-voltage side will be affected by the electromagnetic interference of the high-voltage side.

[0011] In addition, the new high-voltage circuit has another strict requirement, which is that no short circuit can occur after the high voltage is destroyed, and the coil and capacitive isolator have the potential for short circuit. Utility Model Content

[0012] The present invention aims to at least partially address one of the technical problems of the aforementioned technologies. To this end, one objective of the present invention is to provide a buck converter circuit that can achieve secure signal isolation and high-speed transmission while effectively mitigating short-circuit risks, while also enabling output / error feedback to ensure timely and accurate loop control.

[0013] The second purpose of the present invention is to provide a power supply that can achieve safe signal isolation and high-speed transmission while effectively avoiding short-circuit risks; and can also realize output / error feedback to ensure the timeliness and accuracy of loop control.

[0014] The third object of the present invention is to provide an electronic device whose power supply system can achieve safe signal isolation and high-speed transmission while effectively avoiding short-circuit risks; and can also realize output / error feedback to ensure the timeliness and accuracy of loop control.

[0015] To achieve the above objectives, the first embodiment of the present invention proposes a buck conversion circuit based on millimeter wave isolation, comprising: a control circuit, a millimeter wave isolator, a high-voltage drive circuit, and a voltage output terminal; the millimeter wave isolator comprises a first transmission channel and a second transmission channel; the high-voltage drive circuit comprises a drive and logic module and a driver;

[0016] The control circuit is connected to the drive and logic module via the first transmission channel of the millimeter wave isolator. The drive and logic module, the drive component and the voltage output end are connected in sequence. The voltage output end is also feedback connected to the drive and logic module. The drive and logic module is then connected to the control circuit via the second transmission channel of the millimeter wave isolator.

[0017] According to a BUCK conversion circuit based on millimeter wave isolation according to an embodiment of the present invention, on the one hand, a millimeter wave isolator is used to achieve communication isolation between the control circuit and the high-voltage drive circuit, which can not only achieve safe signal isolation and high-speed transmission; but also the millimeter wave carrier antenna is small, does not require an optical coupler and an additional isolation layer, can be packaged using a standard process, and has a low-cost competitive advantage; furthermore, even if the product is punctured, the antenna using wireless communication will not bring the risk of metal short circuit. On the other hand, the second transmission channel based on the millimeter wave isolator forms an output / error feedback closed loop. The control circuit can not only achieve dynamic adjustment of the high-voltage drive based on the feedback of the output voltage, but also can achieve timely control of the circuit output based on the error feedback, thereby ensuring the timeliness and accuracy of the loop control.

[0018] In addition, the millimeter wave isolation-based buck conversion circuit proposed in the above embodiment of the present invention may also have the following additional technical features:

[0019] Optionally, the millimeter wave isolator includes a first millimeter wave transceiver circuit corresponding to the first transmission channel and a second millimeter wave transceiver circuit corresponding to the second transmission channel; the first millimeter wave transceiver circuit includes a first millimeter wave transmitting end, a first millimeter wave receiving end, a first transmitting antenna and a first receiving antenna; the second millimeter wave transceiver circuit includes a second millimeter wave transmitting end, a second millimeter wave receiving end, a second transmitting antenna and a second receiving antenna;

[0020] The output end of the control circuit, the first millimeter wave transmitting end, and the first transmitting antenna are connected in sequence; the first transmitting antenna and the first receiving antenna are connected based on millimeter wave wireless communication; the first receiving antenna, the first millimeter wave receiving end, and the input end of the driving and logic module are connected in sequence;

[0021] The output end of the driving and logic module, the second millimeter-wave transmitting end and the second transmitting antenna are connected in sequence; the second transmitting antenna and the second receiving antenna are connected based on millimeter-wave wireless communication; the second receiving antenna, the second millimeter-wave receiving end and the feedback input end of the control circuit are connected in sequence.

[0022] Optionally, the first millimeter wave transceiver circuit further includes a first signal modulation circuit and a first signal demodulation circuit; the second millimeter wave transceiver circuit further includes a second signal modulation circuit and a second signal demodulation circuit;

[0023] The output end of the control circuit is connected to the first millimeter wave transmitting end via the first signal modulation circuit; the first millimeter wave receiving end is connected to the input end of the driving and logic module via the first signal demodulation circuit;

[0024] The output end of the driving and logic module is connected to the second millimeter wave transmitting end via the second signal modulation circuit; the second millimeter wave receiving end is connected to the feedback input end of the control circuit via the second signal demodulation circuit.

[0025] Optionally, the millimeter wave isolator further includes a matching network;

[0026] A matching network is connected between the first millimeter wave transmitting end and the first transmitting antenna; a matching network is connected between the first millimeter wave receiving end and the first receiving antenna;

[0027] A matching network is connected between the second millimeter wave transmitting end and the second transmitting antenna; and a matching network is connected between the second millimeter wave receiving end and the second receiving antenna.

[0028] Optionally, the first millimeter wave transmitting end includes a first oscillator and a transmitting end power amplifier; the output end of the first oscillator is connected to the first input end of the transmitting end power amplifier, and the second input end of the transmitting end power amplifier receives an input signal; or the input end of the first oscillator receives an input signal, and the output end is connected to the input end of the transmitting end power amplifier;

[0029] Alternatively, the first millimeter wave transmitting end includes a first oscillator; an input end of the first oscillator receives an input signal, and an output end is connected to the first transmitting antenna.

[0030] Optionally, the second millimeter wave transmitting end includes a first oscillator and a transmitting end power amplifier; the output end of the first oscillator is connected to the first input end of the transmitting end power amplifier, and the second input end of the transmitting end power amplifier receives an input signal; or the input end of the first oscillator receives an input signal, and the output end is connected to the input end of the transmitting end power amplifier;

[0031] Or the second millimeter wave transmitting end includes a first oscillator; the input end of the first oscillator receives an input signal, and the output end is connected to the second transmitting antenna.

[0032] Optionally, the first millimeter wave receiving end includes a receiving end power amplifier and a detector; the input end of the receiving end power amplifier is connected to the first receiving antenna, and the output end thereof is connected to the input end of the detector;

[0033] Alternatively, the first millimeter wave receiving end includes a receiving end power amplifier and a mixer; the input end of the receiving end power amplifier is connected to the first receiving antenna, the first output end thereof is connected to the first input end of the mixer, and the second output end thereof is connected to the second input end of the mixer;

[0034] Or the first millimeter wave receiving end includes a receiving end power amplifier, a mixer and a second oscillator; the input end of the receiving end power amplifier is connected to the first receiving antenna, the output end thereof is connected to the first input end of the mixer, and the output end of the second oscillator is connected to the second input end of the mixer.

[0035] Optionally, the second millimeter wave receiving end includes a receiving end power amplifier and a detector; the input end of the receiving end power amplifier is connected to the second receiving antenna, and the output end thereof is connected to the input end of the detector;

[0036] Alternatively, the second millimeter wave receiving end includes a receiving end power amplifier and a mixer; the input end of the receiving end power amplifier is connected to the second receiving antenna, the first output end thereof is connected to the first input end of the mixer, and the second output end thereof is connected to the second input end of the mixer;

[0037] Or the second millimeter wave receiving end includes a receiving end power amplifier, a mixer and a second oscillator; the input end of the receiving end power amplifier is connected to the second receiving antenna, the output end thereof is connected to the first input end of the mixer, and the output end of the second oscillator is connected to the second input end of the mixer.

[0038] Optionally, the control circuit includes an off-time blanking unit, a control terminal and an operation unit, an SR trigger, a constant on-time unit, a control terminal logic level shifter, and an error detection unit;

[0039] The feedback input terminal of the control circuit and the output terminal of the off-time blanking unit are respectively connected to the input terminal of the control terminal and the operation unit; the output terminal of the control terminal and the operation unit are connected to the S terminal of the SR flip-flop; the constant on-time unit is connected to the R terminal of the SR flip-flop; the Q terminal of the SR flip-flop is connected to the input terminal of the control-terminal logic level shifter; and the output terminal of the control-terminal logic level shifter is connected to the output terminal of the control circuit;

[0040] The output end of the error detection unit is connected to the control end logic level shifter; the input end of the error detection unit and the feedback input end of the control circuit are respectively connected to the second transmission channel of the millimeter wave isolator.

[0041] Optionally, the control circuit further includes a control terminal bias and reference unit, a control terminal undervoltage lockout unit, and an overvoltage protection unit;

[0042] The control end bias and reference unit are respectively connected to the off-time blanking unit, the control end and operation unit, the SR trigger, the constant on-time unit, the control end logic level shifter, the error detection unit, the control end undervoltage lockout unit and the overvoltage protection unit; the control end undervoltage lockout unit and the overvoltage protection unit are respectively connected to the control end logic level shifter.

[0043] Optionally, the driving and logic module includes a driving end logic level shifter, a driving chain unit, a comparator, and a driving end AND operation unit;

[0044] The input end of the driving and logic module, the driving end logic level shifter, the driving chain unit and the output end of the driving and logic module are connected in sequence;

[0045] The feedback input terminal of the driving and logic module is connected to the negative input terminal of the comparator; the output terminal of the comparator and the error signal output terminal of the driving end logic level shifter are respectively connected to the input terminal of the driving end and the operation unit; the output terminal of the driving end and the operation unit is connected to the second transmission channel.

[0046] Optionally, the driving and logic module further includes a minimum on-time output unit and a clock generation unit;

[0047] The input end of the driving and logic module is connected to the driving end logic level shifter via the minimum on-time output unit; and the clock generation unit is connected to the driving end logic level shifter.

[0048] Optionally, the driving and logic module further includes a driving end bias and reference unit, a driving end undervoltage lockout unit and an overcurrent protection unit; the driving end bias and reference unit are respectively connected to the driving end logic level shifter, the driving chain unit, the comparator, the driving end and operation unit, the driving end undervoltage lockout unit and the overcurrent protection unit; the driving end undervoltage lockout unit and the overcurrent protection unit are respectively connected to the driving end logic level shifter.

[0049] To achieve the above-mentioned objectives, a second embodiment of the present invention provides a power supply, which includes the above-mentioned BUCK conversion circuit based on millimeter wave isolation.

[0050] In addition, the power supply according to the above embodiment of the present invention may also have the following additional technical features:

[0051] Optionally, the BUCK conversion circuit is a high-voltage bridge BUCK conversion circuit;

[0052] The control circuit is the control signal circuit of the upper bridge and the control signal circuit of the lower bridge in the high-voltage bridge BUCK conversion circuit; the high-voltage drive circuit is the high-voltage device of the upper bridge and the high-voltage device of the lower bridge in the high-voltage bridge BUCK conversion circuit.

[0053] To achieve the above-mentioned purpose, a second embodiment of the present invention provides an electronic device, which includes the above-mentioned power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 Schematic diagram of the structures of three common high and low voltage isolators in the prior art;

[0055] Figure 2 This is a schematic diagram of a typical high-voltage bridge circuit structure in the prior art;

[0056] Figure 3 A schematic diagram of the structure of a BUCK conversion circuit based on millimeter wave isolation provided by an embodiment of the present utility model;

[0057] Figure 4 Schematic diagram of the structure and connection of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided by the embodiment of the utility model Figure 1 ;

[0058] Figure 5 Schematic diagram of the structure of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided by the embodiment of the utility model Figure 2 ;

[0059] Figure 6 Schematic diagram of the structure of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided by the embodiment of the utility model Figure 3 ;

[0060] Figure 7 A feasible implementation method for the transmitting end and receiving end of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided in the embodiment of the utility model;

[0061] Figure 8 Another feasible implementation method of the transmitting end and receiving end of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided in the embodiment of the utility model;

[0062] Figure 9 Another feasible implementation method of the transmitting end and receiving end of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided in the embodiment of the utility model;

[0063] Figure 10 Another feasible implementation method of the transmitting end and receiving end of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided in the embodiment of the utility model;

[0064] Figure 11 Another feasible implementation method of the transmitting end and receiving end of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided in the embodiment of the utility model;

[0065] Figure 12 Another feasible implementation method of the transmitting end and receiving end of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided in the embodiment of the utility model;

[0066] Figure 13 Another feasible implementation method of the transmitting end and receiving end of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided in the embodiment of the utility model;

[0067] Figure 14 Another feasible implementation method of the transmitting end and receiving end of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided in the embodiment of the utility model;

[0068] Figure 15 Another feasible implementation method of the transmitting end and receiving end of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided in the embodiment of the utility model;

[0069] Figure 16 A schematic diagram of the structure of a control circuit in a BUCK conversion circuit based on millimeter wave isolation provided by an embodiment of the present invention;

[0070] Figure 17A schematic structural diagram of a high-voltage drive circuit in a buck conversion circuit based on millimeter-wave isolation provided by an embodiment of the present invention;

[0071] Figure 18 A schematic diagram of the overall structure of a BUCK conversion circuit based on millimeter wave isolation provided by an embodiment of the present utility model;

[0072] Figure 19 This is a structural diagram of a high-voltage bridge-type BUCK conversion circuit provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0073] The following describes in detail embodiments of the present invention, examples of which 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 intended to explain the present invention, and should not be construed as limiting the present invention.

[0074] Different from the BUCK conversion circuit in the prior art, the present invention uses a millimeter-wave isolator to achieve communication isolation between the control circuit and the high-voltage drive circuit, which can achieve safe isolation and high-speed transmission of signals and avoid the risk of short circuit after the product is punctured; more importantly, an output / error feedback closed loop is formed through the second transmission channel of the millimeter-wave isolator, which can simultaneously achieve dynamic adjustment of the high-voltage drive and timely control of output errors.

[0075] To better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0076] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0077] Figure 3 A schematic structural diagram of a millimeter-wave isolation-based BUCK conversion circuit provided in an embodiment of the present invention.

[0078] like Figure 3 As shown, the embodiment of the present invention provides a BUCK conversion circuit based on millimeter wave isolation, which includes a control circuit Controller, a millimeter wave isolator mmW Isolater (hereinafter referred to as millimeter wave isolator mmW I), a high-voltage drive circuit HVDC and a voltage output terminal VO The millimeter wave isolator mmW I includes a first transmission channel mmW I-1 and a second transmission channel mmW I-2; the high-voltage drive circuit includes a drive and logic module Gate Driver and Logic and a drive element M;

[0079] The control circuit Controller is connected to the driving and logic module Gate Driver and Logic via the first transmission channel mmW I-1 of the millimeter wave isolator mmW I. The driving and logic module Gate Driver and Logic, the driver M and the voltage output terminal V O Connect in sequence, the voltage output terminal V O It is also feedback-connected to the driving and logic module Gate Driver and Logic, and the driving and logic module Gate Driver and Logic is then connected to the control circuit via the second transmission channel mmW I-2 of the millimeter wave isolator mmW I.

[0080] In this embodiment, regarding the first transmission channel mmW I-1: After the system signal is input into the buck converter circuit of this embodiment, the control circuit isolates the digital signal via the first transmission channel and transmits it at high speed to the driver and logic modules in the high-voltage driver circuit for conversion into a drive signal capable of driving the driver. This demonstrates that this embodiment implements isolated loop drive control via the first transmission channel mmW I-1.

[0081] In this embodiment, regarding the second transmission channel mmW I-2: the output voltage V of the BUCK conversion circuit O The feedback is fed back to the drive and logic modules in the high-voltage drive circuit, which converts it into a digital feedback signal. The feedback signal is then isolated and transmitted to the control circuit at high speed via the second transmission channel. The control circuit generates a corresponding control signal based on the feedback signal, which is transmitted via the first transmission channel to dynamically adjust the drive control. At the same time, when errors such as undervoltage or overcurrent occur in the circuit, the error information will also be transmitted to the control circuit in the form of a feedback signal via the second transmission channel in isolation, so that the control circuit can promptly control the loop error, such as controlling the disabling of V OUT Output.

[0082] It's important to note that due to loop transmission delay (typically less than 10ns), the nonlinearity of the control system will be greater than that of a non-isolated system. Specifically, the control circuit typically employs hysteresis control or constant on-time control, and the loop control signal transmitted by hysteresis control / constant on-time control (via the second transmission channel) is a high-low digital logic signal. Since a circuit error occurs, the output (on the driver side) is a low-level digital logic signal (the default is high when normal). Therefore, the error signal, also digital, can share the same channel with the loop control signal.

[0083] The millimeter-wave isolation-based buck converter circuit utilizes millimeter-wave isolators for communication isolation between its control circuit and high-voltage drive circuit. This ensures safe isolation and high-speed transmission of high- and low-voltage signals, ensuring timely and accurate loop control and mitigating short-circuit risks. More importantly, the second transmission channel constructed through the millimeter-wave isolator forms an output / error feedback closed loop, enabling both dynamic regulation of the high-voltage drive and timely control of output errors.

[0084] See also Figure 4 and Figure 5 , Figure 4 The structure and connection diagram of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided by the embodiment of the utility model Figure 1 ; Figure 5 Schematic diagram of the structure of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided by the embodiment of the utility model Figure 2 ; Figure 6 Schematic diagram of the structure of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided by the embodiment of the utility model Figure 3 .

[0085] This embodiment Figure 3 Further expansion is made on the basis of the embodiment, and the millimeter wave isolator mmW I is further refined.

[0086] like Figure 4 As shown, the millimeter wave isolator mmW I structure described in this embodiment includes a first millimeter wave transceiver circuit TR-1 corresponding to a first transmission channel and a second millimeter wave transceiver circuit TR-2 corresponding to a second transmission channel.

[0087] The first millimeter wave transceiver circuit TR-1 includes a first millimeter wave transmitting end TX1, a first millimeter wave receiving end RX1, a first transmitting antenna and a first receiving antenna;

[0088] The second millimeter wave transceiver circuit TR-2 includes a second millimeter wave transmitting end TX2, a second millimeter wave receiving end RX2, a second transmitting antenna and a second receiving antenna;

[0089] The output end of the control circuit Controller, the first millimeter-wave transmitting end TX1, and the first transmitting antenna are connected in sequence; the first transmitting antenna and the first receiving antenna are connected based on millimeter-wave wireless communication; the first receiving antenna, the first millimeter-wave receiving end RX1, and the input end of the driver and logic module Gate Driver and Logic are connected in sequence;

[0090] The output end of the driver and logic module Gate Driver and Logic, the second millimeter-wave transmitting end TX2, and the second transmitting antenna are connected in sequence; the second transmitting antenna and the second receiving antenna are connected based on millimeter-wave wireless communication; the second receiving antenna, the second millimeter-wave receiving end RX2, and the feedback input end of the control circuit Controller are connected in sequence.

[0091] Here, the millimeter-wave isolator mmW1 operates in full-duplex mode and has bidirectional communication capabilities. A first transmission channel is formed by the first millimeter-wave transmitter TX1, the first transmitting antenna, the first receiving antenna, and the first millimeter-wave receiver RX1, namely, the first millimeter-wave transceiver circuit TR-1, serving as a high-voltage drive control communication channel from the control circuit to the high-voltage drive circuit. A second transmission channel is formed by the second millimeter-wave transmitter TX2, the second transmitting antenna, the second receiving antenna, and the second millimeter-wave receiver RX2, namely, the first millimeter-wave transceiver circuit TR-1, serving as an output / error feedback communication channel from the high-voltage drive circuit to the control circuit.

[0092] The working principle of the buck conversion circuit based on the above-mentioned millimeter-wave isolator is as follows:

[0093] The input signal is generated by the control circuit and then output to the first millimeter-wave transmitter TX1, which controls the first transmitting antenna to transmit the signal to the first receiving antenna for reception. The first millimeter-wave receiver RX1 demodulates the received control signal and sends it to the drive and logic module in the high-voltage drive circuit, which generates the drive signal for the driver. This realizes the drive control of the loop.

[0094] At the same time, the buck's output voltage, VO, is fed back in real time to the driver and logic module. After processing, it is converted into a digital feedback signal and output to the second millimeter-wave transmitter, TX2. This second millimeter-wave transmitter controls the second transmitting antenna to transmit millimeter waves to the second receiving antenna. The feedback signal is then demodulated at the second millimeter-wave receiver, RX2, and transmitted to the control circuit for processing. The control circuit generates a corresponding control signal based on the received feedback signal. This signal is then transmitted via the first millimeter-wave transmitter, TX1, to control the first transmitting antenna. After receiving the signal at the first receiving antenna, RX1 demodulates the signal and sends it to the driver and logic module, which generates the drive signal for the driver. This forms a closed-loop output feedback circuit, enabling dynamic adjustment of the loop's high-voltage drive.

[0095] Furthermore, when an error occurs in the buck converter circuit, such as undervoltage or overcurrent, this error information is transmitted sequentially via the second millimeter-wave transmitter TX2, the second transmitting antenna, the second receiving antenna, and the second millimeter-wave receiver RX2 (i.e., the second transmission channel) to the control circuit for processing. The control circuit generates a corresponding control signal based on the received error signal and transmits it via the first transmission channel to the driver and logic module, which controls the shutdown of the driver. This forms a closed-loop error feedback loop, enabling timely control of loop errors.

[0096] In some specific implementations of this embodiment, Figure 5 As shown, the first millimeter wave transceiver circuit TR-1 further includes a first signal modulation circuit and a first signal demodulation circuit; the second millimeter wave transceiver circuit TR-2 further includes a second signal modulation circuit and a second signal demodulation circuit.

[0097] The output end of the control circuit Controller is connected to the first millimeter wave transmitting end TX1 via the first signal modulation circuit; the first millimeter wave receiving end RX1 is connected to the input end of the driver and logic module Gate Driver and Logic via the first signal demodulation circuit;

[0098] The output end of the driver and logic module Gate Driver and Logic is connected to the second millimeter wave transmitter TX2 via the second signal modulation circuit; the second millimeter wave receiver RX1 is connected to the feedback input end of the control circuit Controller via the second signal demodulation circuit.

[0099] Among them, the first signal modulation circuit and the second signal modulation circuit are used to load the baseband signal to be transmitted into the carrier signal, and control the antenna to radiate it in the form of an amplitude modulated wave, a phase modulated wave or a frequency modulated wave to ensure that the signal can be transmitted and received correctly.

[0100] The first signal demodulation circuit and the second signal demodulation circuit are used to restore the original baseband signal by demodulating and recovering the received modulated signal to ensure that the signal can be correctly interpreted.

[0101] Here, by respectively setting up signal modulation and signal demodulation circuits in the first millimeter-wave transceiver circuit TR1 and the second millimeter-wave transceiver circuit TR2, it is ensured that the first transmission channel corresponding to the first millimeter-wave transceiver circuit and the second transmission channel corresponding to the second millimeter-wave transceiver circuit can effectively and correctly transmit signals, thereby establishing a high-quality bidirectional communication mechanism.

[0102] In some specific implementations of this embodiment, Figure 6 As shown, the millimeter wave isolator mmW I also includes four matching networks.

[0103] A matching network is connected between the first millimeter wave transmitting end TX1 and the first transmitting antenna; a matching network is connected between the first millimeter wave receiving end RX1 and the first receiving antenna;

[0104] A matching network is connected between the second millimeter wave transmitting end TX2 and the second transmitting antenna; and a matching network is connected between the second millimeter wave receiving end RX2 and the second receiving antenna.

[0105] Here, in order to avoid antenna coupling that may occur between the transmitting antenna and the receiving antenna in the millimeter wave isolator due to the close distance, this specific embodiment configures matching networks at both the transmitting end and the receiving end in the first millimeter wave transceiver circuit and the second millimeter wave transceiver circuit to improve communication through impedance matching and ensure effective signal transmission.

[0106] See also Figures 7 to 16 , Figures 7 to 16 The figures are schematic structural diagrams of several feasible implementations of the transmitting end and the receiving end of the millimeter wave isolator in the buck conversion circuit based on millimeter wave isolation provided in the embodiments of the present invention.

[0107] The embodiments of the present invention are further expanded based on the above embodiments, and provide several feasible implementation methods for the transmitting end and the receiving end in the millimeter wave isolator.

[0108] like Figures 7 to 9 As shown, one implementation of the first millimeter wave transmitting end TX1 / the second millimeter wave transmitting end TX2 is:

[0109] The invention comprises a first oscillator VCO and a transmitting end power amplifier PA, wherein the first oscillator VCO may be a voltage controlled oscillator VCO.

[0110] Specifically, the output end of the first oscillator VCO is connected to the first input end of the transmitter power amplifier PA, and the second input end of the transmitter power amplifier PA receives the signal to be modulated; the output end of the transmitter power amplifier PA is connected to the transmitting antenna; if a matching network is configured, the output end of the transmitter power amplifier PA is further connected to the transmitting antenna via the matching network.

[0111] Based on the above implementation, the modulation of the carrier signal and the signal to be modulated can be achieved directly at the transmitting end power amplifier PA.

[0112] like Figures 10 to 12 As shown, another implementation of the first millimeter wave transmitting end TX1 / the second millimeter wave transmitting end TX2 is:

[0113] The invention comprises a first oscillator VCO and a transmitting end power amplifier PA, wherein the first oscillator VCO may be a voltage controlled oscillator VCO.

[0114] Specifically, the input end of the first oscillator VCO receives the signal to be modulated, and the output end is connected to the input end of the transmitting power amplifier PA; the input end of the transmitting power amplifier PA is connected to the transmitting antenna; if a matching network is configured, the output end of the transmitting power amplifier PA is further connected to the transmitting antenna via the matching network.

[0115] Based on the above implementation, the modulation of the carrier signal and the signal to be modulated can be achieved directly at the first oscillator VCO at the transmitting end.

[0116] It should be noted that both of the above implementations omit the mixer at the transmitter end, and the carrier and signal modulation are directly set up at the transmitter power amplifier or the first oscillator. This eliminates the mixer and reduces the power amplifier's on-time, saving power to a certain extent.

[0117] like Figures 13 to 15 As shown, another implementation of the first millimeter wave transmitting end TX1 / the second millimeter wave transmitting end TX2 is:

[0118] The invention comprises a first oscillator VCO, wherein the first oscillator VCO may be a voltage controlled oscillator VCO.

[0119] Specifically, the input end of the first oscillator VCO receives the signal to be modulated, and the output end is connected to the transmitting antenna; if a matching network is configured, the output end of the first oscillator VCO is further connected to the transmitting antenna via the matching network.

[0120] Based on the above implementation, the first oscillator VCO at the transmitter not only generates a carrier wave but also modulates the signal with the carrier wave to form a mixed wave, which is then transmitted through the antenna. This not only satisfies signal transmission requirements but also saves space.

[0121] like Figure 7 、 Figure 10 and Figure 13 As shown, one implementation of the first millimeter wave receiving end RX1 / the second millimeter wave receiving end RX2 is:

[0122] It includes a receiving end power amplifier AMP and a detector Envelope Detector.

[0123] Specifically, the input end of the receiving end power amplifier AMP is connected to the receiving antenna. If a matching network is configured, the input end of the receiving end power amplifier AMP is connected to the matching network; the output end of the receiving end power amplifier AMP is connected to the input end of the detector Envelope Detector.

[0124] like Figure 8 、 Figure 11 and Figure 14 As shown, another implementation of the first millimeter wave receiving end RX1 / the second millimeter wave receiving end RX2 is:

[0125] The system comprises a receiving end power amplifier AMP, a mixer and a second oscillator LO, wherein the second oscillator is a local voltage-controlled oscillator LO.

[0126] Specifically, the input end of the receiving end power amplifier AMP is connected to the first receiving antenna. If a matching network is configured, the input end of the receiving end power amplifier AMP is connected to the matching network; the output end of the receiving end power amplifier AMP is connected to the first input end of the mixer Mixe, and the output end of the second oscillator LO is connected to the second input end of the mixer Mixe.

[0127] like Figure 9 、 Figure 12 and Figure 15 As shown, another implementation of the first millimeter wave receiving end RX1 / the second millimeter wave receiving end RX2 is:

[0128] It includes a receiving end power amplifier AMP and a mixer Mixe.

[0129] An input end of the receiving end power amplifier AMP is connected to a first receiving antenna. If a matching network is configured, the input end of the receiving end power amplifier AMP is connected to the matching network. A first output end of the receiving end power amplifier AMP is connected to a first input end of the mixer Mixe, and a second output end thereof is connected to a second input end of the mixer Mixe.

[0130] As can be seen from the above, in this embodiment, the first millimeter-wave transmitting end TX1 and the second millimeter-wave transmitting end TX2 each have three optional implementations. Correspondingly, the first millimeter-wave receiving end RX1 and the second millimeter-wave receiving end RX2 also have three optional implementations. Therefore, through the optional combination of the first millimeter-wave transmitting end TX1 and the first millimeter-wave receiving end RX1, the first millimeter-wave transceiver circuit TR-1 has nine optional implementations. Similarly, through the optional combination of the second millimeter-wave transmitting end TX2 and the second millimeter-wave receiving end RX2, the second millimeter-wave transceiver circuit TR-2 also has nine optional implementations. Furthermore, the millimeter-wave isolator MMW1 in the millimeter-wave isolation-based buck converter circuit provided in this embodiment has 18 optional implementations.

[0131] In some specific implementations of this embodiment, the millimeter wave isolator is a packaged chip structure of a millimeter wave chip.

[0132] The buck converter circuit of this embodiment utilizes a millimeter-wave chip for signal isolation and transmission. This not only offers the advantages of high transmission speed and high bandwidth (1Mbps at low frequencies to 10Gbps at high frequencies), adapting to any scenario. Furthermore, the millimeter-wave carrier antenna is small, and the contactless chip's embedded antenna provides secure and reliable transmission isolation. It eliminates the need for optocouplers and additional isolation layers, and can utilize standard CMOS processes and packaging, offering a competitive advantage in cost. Furthermore, millimeter-wave chips with standardized packaging processes are easier to integrate into buck converter circuit products, offering even greater advantages. Furthermore, millimeter-wave wireless communication prevents metal shorts from occurring even if the product is punctured.

[0133] See also Figure 16 , Figure 16 This is a schematic diagram of the structure of the control circuit in the buck conversion circuit based on millimeter wave isolation provided by an embodiment of the present invention.

[0134] This embodiment further expands upon any of the above embodiments and specifically refines the control circuit therein.

[0135] like Figure 16 As shown, the control circuit Controller includes an off-time blanking unit T min,offBlanking, control end and operation unit, SR trigger SR Latch, constant on-time unit Constant On-timeCell, control end logic level shifter Logic and Level Shifter and error detection unit FaultMonitoring.

[0136] Specifically, the feedback input terminal V IN The blanking unit with the off time T min,off The output end of Blanking is connected to the control end and the input end of the operation unit respectively; the output end of the control end and the operation unit is connected to the S end of the SR trigger SR Latch; the constant on-time cell is connected to the R end of the SR trigger SR Latch; the Q end of the SR trigger SR Latch is connected to the input end of the control end logic level shifter Logic and Level Shifter; the output end of the control end logic level shifter Logic and Level Shifter is connected to the output end V of the control circuit OUT connect;

[0137] The output end of the fault detection unit Fault Monitoring is connected to the control end logic level shifter Logic and Level Shifter; the input end of the fault detection unit Fault Monitoring is connected to the feedback input end V of the control circuit. IN They are respectively connected to the second transmission channel of the millimeter wave isolator, specifically to the output end of the second millimeter wave receiving end RX2.

[0138] The working principle of the control circuit Controller in this embodiment to achieve dynamic adjustment of high-voltage drive and timely control of output errors is as follows:

[0139] The feedback signal transmitted through the second transmission channel is transmitted through the feedback input terminal V IN With the off time blanking unit T min,off Blanking performs an AND operation and controls the SR trigger SR Latch to set. If the setting is valid, the constant on-time cell is triggered to start timing, and the SR trigger SRLatch is reset after a fixed timing. The Q-end output of the SR trigger SR Latch is processed by the control-end logic level shifter Logic andLevel Shifter and then outputs V OUT .

[0140] At the same time, when the second transmission channel transmits the error signal Fault, the error detection unit FaultMonitoring will notify the control end logic level shifter Logic and LevelShifter to disable V OUT Output control.

[0141] In some specific implementations of this embodiment, Figure 16 As shown, the control circuit Controller further includes a control end bias and reference unit Biasing and Reference, a control end undervoltage lockout unit UndervoltageLockout and an overvoltage protection unit Overvoltage Protection.

[0142] Specifically, the control-end bias and reference unit Biasing and Reference is connected to each unit in the control circuit; the control-end undervoltage lockout unit Undervoltage Lockout and the overvoltage protection unit Overvoltage Protection are respectively connected to the control-end logic level shifter Logic and Level Shifter.

[0143] Here, the control end bias and reference unit Biasing and Reference is used to provide the required bias and reference voltage for each unit in the control unit; the control end undervoltage lockout unit Undervoltage Lockout and the overvoltage protection unit Overvoltage Protection can shut down the chip when undervoltage and overvoltage occur, respectively, to play the role of undervoltage and overvoltage protection. As local protection units, the control end undervoltage lockout unit and the overvoltage protection unit have the characteristics of fast response speed, no loop control and high priority, and can play a good protection role. Optionally, other local protection units can be added or subtracted according to specific circumstances, such as overtemperature protection unit, short circuit protection unit, etc.

[0144] See also Figure 17 , Figure 17 This is a schematic structural diagram of a high-voltage drive circuit in a buck conversion circuit based on millimeter-wave isolation provided by an embodiment of the present invention.

[0145] This embodiment further expands upon any of the above embodiments and specifically refines the high-voltage drive circuit therein.

[0146] like Figure 17As shown, the gate driver and logic module specifically includes a driver-end logic level shifter, a driver chain unit, a comparator, and a driver-end and operation unit;

[0147] The input terminal PWM_IN of the driving and logic module, the driving end logic level shifter Logic and Level Shifter, the driving chain unit Driver Chain and the output terminal of the driving and logic module are connected in sequence;

[0148] The feedback input terminal of the driving and logic module is connected to the negative input terminal of the comparator; the output terminal of the comparator and the error signal output terminal FT of the driving end logic level shifter Logic and Level Shifter are respectively connected to the input terminal of the driving end and operation unit; the output terminal CT of the driving end and operation unit is connected to the second transmission channel of the millimeter wave isolator, specifically to the input terminal of the second millimeter wave transmitting end TX2.

[0149] The driving-end logic and level shifter is used for logic synthesis and level shifting, and can convert the received signal into a correct driving logic signal and perform level shifting on the driving signal.

[0150] As an optional example of this embodiment, the driver chain unit Driver Chain may be composed of a bootstrap circuit, a dead time logic circuit Deadtime Logic, and an inverter chain Inverter Chain.

[0151] The working principle of the gate driver and logic module described in this embodiment is as follows:

[0152] The input terminal PWM_IN signal of the driving and logic module is converted into a driving logic signal by the driving terminal logic level shifter Logic and Level Shifter and then output to the driver chain unit Driver Chain, which converts the driving logic signal into a driving component ( Figure 17 M1 and M2 in the figure) have their own appropriate driving signals;

[0153] Buck converter circuit output voltage V O After performing an AND operation with the error signal Fault output from the error signal output terminal FT, the control signal CT is output through the output terminal CT to the second transmission channel of the millimeter wave isolator, that is, the output terminal of the second millimeter wave transmitting terminal TX2.

[0154] In some specific implementations of this embodiment, Figure 17 As shown, the driving and logic module GateDriver and Logic also includes a minimum on-time output unit Minimum On-time (also known as a minimum input pulse width unit) and a clock generation unit CLK Generator;

[0155] The input terminal PWM_IN of the driving and logic module is connected to the driving end logic level shifter Logic and Level Shifter via the minimum on-time output unit MinimumOn-time; the clock generating unit CLK Generator is connected to the driving end logic level shifter Logic and Level Shifter.

[0156] Here, the minimum on-time output unit and the clock generation unit play a role of input control, and can supplement and optimize the signal inputted by the input terminal PWM_IN to reduce signal interference and improve signal quality.

[0157] In some specific implementations of this embodiment, Figure 17 As shown, the driving and logic module GateDriver and Logic also includes a driving end bias and reference unit Biasing and Reference, a driving end undervoltage lockout unit Undervoltage Lockout and an overcurrent protection unit Overcurrent Protection.

[0158] The driving end bias and reference unit Biasing and Reference is connected to each unit in the driving and logic module; the driving end undervoltage lockout unit Undervoltage Lockout and the overcurrent protection unit Overcurrent Protection are respectively connected to the driving end logic level shifter Logic and Level Shifter.

[0159] The driver-side bias and reference unit provides the required bias and reference voltages for each unit in the driver and logic modules. The driver-side undervoltage lockout unit and overcurrent protection unit serve as local protection units, offering fast response, independence from loop control, and high priority, providing excellent protection. Optionally, other local protection units, such as an overtemperature protection unit and a short-circuit protection unit, can be added or removed depending on the specific situation.

[0160] like Figure 17As shown, in this embodiment, the driving components in the high-voltage driving circuit specifically include transistors M1 and M2, which are preferably enhancement-mode gallium nitride power transistors and are normally-off switches.

[0161] In this embodiment, when the gate voltage VGS (i.e., the output voltage of the driver and logic module) of transistors M1 and M2 is greater than the threshold voltage Vth, the resistance of the source and drain electrodes is generally several hundred milliohms, and the on-state voltage drop is very small, and the switches are considered to be open, that is, transistors M1 and M2 are turned on. When the gate-source voltage VGS is less than the threshold voltage Vth, the resistance of the source and drain electrodes is generally several thousand ohms, which can withstand high voltages of tens to hundreds of volts, and the switches are considered to be closed, that is, transistors M1 and M2 are turned off.

[0162] As can be seen from the above, the millimeter-wave isolation-based buck converter circuit provided by each of the above embodiments of the present invention utilizes millimeter-wave isolation technology to achieve safe isolation and high-speed transmission of signals between the control circuit in the low-voltage area and the high-voltage drive circuit in the high-voltage area, thereby isolating the electromagnetic interference and noise in the high-voltage area and reducing the operating voltage and quiescent current of the low-voltage control circuit. At the same time, by combining a control circuit using constant on-time control, millimeter-wave communication at the nanosecond level, and a high-voltage drive circuit equipped with a local protection mechanism, the effectiveness of system control and the safety of operation are guaranteed. More importantly, the second transmission channel in the full-duplex mode millimeter-wave isolator is used to construct an output / error feedback closed loop. The control circuit can not only dynamically adjust the high-voltage drive based on the feedback of the output voltage, but also timely control the circuit output based on the error feedback, thereby ensuring the timeliness and accuracy of the loop control.

[0163] See also Figure 18 and Figure 19 , Figure 18 A schematic diagram of the overall structure of a BUCK conversion circuit based on millimeter wave isolation provided by an embodiment of the present utility model; Figure 19 This is a structural diagram of a high-voltage bridge-type BUCK conversion circuit provided by an embodiment of the utility model.

[0164] This embodiment further expands upon any of the above embodiments and is specifically applied to power supply circuits, particularly DC / DC conversion circuits.

[0165] This embodiment provides a power supply, which includes the BUCK conversion circuit based on millimeter wave isolation described in any of the above embodiments. Figure 18 The specific structure of the millimeter-wave isolation-based BUCK conversion circuit is not repeated here. For details, please refer to the description of the above embodiment.

[0166] In some specific implementations of this embodiment, the millimeter-wave isolation-based BUCK conversion circuit can be applied to a high-voltage bridge power supply circuit.

[0167] Specifically, if Figure 19 As shown, the control circuit is the control signal circuit of the upper bridge and the control signal circuit of the lower bridge in the high-voltage bridge BUCK conversion circuit; the high-voltage drive circuit is the high-voltage device of the upper bridge and the high-voltage device of the lower bridge in the high-voltage bridge BUCK conversion circuit.

[0168] Here, the control signal (input) output by the control circuit is input to the upper bridge and the lower bridge respectively; in the upper bridge and the lower bridge, the control signal is isolated and transmitted to the corresponding driving circuit ( Figure 19 The signals are then converted into driving signals for driving the high-voltage devices M1 and M2.

[0169] The two groups of first millimeter wave transceiver circuits are preferably two groups of millimeter wave isolation chips.

[0170] In this embodiment, the first transmission channel in the millimeter wave isolator is provided with two groups of first millimeter wave transceiver circuits to construct two unidirectional transmission paths, which are used for isolated transmission in the upper bridge and the lower bridge respectively.

[0171] High voltage bridge circuits can be divided into different types based on the signal cycle. Among them, the upper and lower bridge type is a general-purpose structure. Figure 19 As shown, the upper bridge Up Bridge and the lower bridge Bottom Bridge respectively adopt a set of first millimeter-wave transceiver circuits described in the above embodiment to realize isolated signal transmission, which can effectively solve the requirements of fast response time, low latency and high-bandwidth digital signal processing required by new high-voltage circuits; and can effectively prevent short circuits from occurring after high voltage destruction.

[0172] The embodiment of the utility model further provides an electronic device based on the power supply described in the above embodiment.

[0173] The electronic device of this embodiment includes the power supply described in the above embodiment.

[0174] In this embodiment, the electronic device may be any device that meets the power circuit configuration requirements.

[0175] The electronic device of this embodiment uses a millimeter-wave isolator in its power supply circuit, using a buck converter circuit to isolate the communication between the control circuit and the high-voltage drive circuit. This not only ensures secure signal isolation and high-speed transmission, but also allows for standard packaging processes, resulting in a low-cost competitive advantage. Furthermore, even if the product is punctured, the wireless antenna eliminates the risk of metal short circuits. More importantly, the millimeter-wave isolator's second transmission channel forms an output / error feedback closed loop. This allows the control circuit to dynamically adjust the high-voltage drive based on output voltage feedback and to promptly control the circuit output based on error feedback, thereby ensuring the timeliness and accuracy of loop control.

[0176] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0177] The present invention is described 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 invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks 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, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0178] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0179] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0180] It should be noted that in the claims, any reference signs placed between brackets shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claim. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0181] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0182] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

[0183] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0184] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0185] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0186] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0187] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A buck conversion circuit based on millimeter wave isolation, characterized in that: include: A control circuit, a millimeter wave isolator, a high-voltage drive circuit, and a voltage output terminal; the millimeter wave isolator includes a first transmission channel and a second transmission channel; The high voltage driving circuit includes a driving and logic module and a driving element; The control circuit is connected to the drive and logic module via the first transmission channel of the millimeter wave isolator, and the drive and logic module, the drive component and the voltage output end are connected in sequence; the voltage output end is also feedback connected to the drive and logic module, and the drive and logic module is then connected to the control circuit via the second transmission channel of the millimeter wave isolator.

2. The millimeter wave isolation-based BUCK conversion circuit according to claim 1, wherein: The millimeter wave isolator includes a first millimeter wave transceiver circuit corresponding to the first transmission channel and a second millimeter wave transceiver circuit corresponding to the second transmission channel; the first millimeter wave transceiver circuit includes a first millimeter wave transmitting end, a first millimeter wave receiving end, a first transmitting antenna and a first receiving antenna; The second millimeter wave transceiver circuit includes a second millimeter wave transmitting end, a second millimeter wave receiving end, a second transmitting antenna and a second receiving antenna; The output end of the control circuit, the first millimeter wave transmitting end, and the first transmitting antenna are connected in sequence; the first transmitting antenna and the first receiving antenna are connected based on millimeter wave wireless communication; the first receiving antenna, the first millimeter wave receiving end, and the input end of the driving and logic module are connected in sequence; The output end of the driving and logic module, the second millimeter wave transmitting end and the second transmitting antenna are connected in sequence; The second transmitting antenna and the second receiving antenna are connected based on millimeter wave wireless communication; the second receiving antenna, the second millimeter wave receiving end and the feedback input end of the control circuit are connected in sequence.

3. The millimeter wave isolation-based BUCK conversion circuit according to claim 2, wherein: The first millimeter wave transceiver circuit further includes a first signal modulation circuit and a first signal demodulation circuit; the second millimeter wave transceiver circuit further includes a second signal modulation circuit and a second signal demodulation circuit; The output end of the control circuit is connected to the first millimeter wave transmitting end via the first signal modulation circuit; the first millimeter wave receiving end is connected to the input end of the driving and logic module via the first signal demodulation circuit; The output end of the driving and logic module is connected to the second millimeter wave transmitting end via the second signal modulation circuit; the second millimeter wave receiving end is connected to the feedback input end of the control circuit via the second signal demodulation circuit.

4. The millimeter wave isolation-based BUCK conversion circuit according to claim 3, wherein: The millimeter wave isolator further includes a matching network; A matching network is connected between the first millimeter wave transmitting end and the first transmitting antenna; a matching network is connected between the first millimeter wave receiving end and the first receiving antenna; A matching network is connected between the second millimeter wave transmitting end and the second transmitting antenna; A matching network is connected between the second millimeter wave receiving end and the second receiving antenna.

5. The millimeter wave isolation-based BUCK conversion circuit according to any one of claims 2 to 4, characterized in that: The first millimeter wave transmitting end includes a first oscillator and a transmitting end power amplifier; the output end of the first oscillator is connected to the first input end of the transmitting end power amplifier, and the second input end of the transmitting end power amplifier receives an input signal; or the input end of the first oscillator receives an input signal, and the output end is connected to the input end of the transmitting end power amplifier; Alternatively, the first millimeter wave transmitting end includes a first oscillator; an input end of the first oscillator receives an input signal, and an output end is connected to the first transmitting antenna.

6. The millimeter wave isolation-based BUCK conversion circuit according to any one of claims 2 to 4, characterized in that: The second millimeter wave transmitting end includes a first oscillator and a transmitting end power amplifier; the output end of the first oscillator is connected to the first input end of the transmitting end power amplifier, and the second input end of the transmitting end power amplifier receives an input signal; or the input end of the first oscillator receives an input signal, and the output end is connected to the input end of the transmitting end power amplifier; Or the second millimeter wave transmitting end includes a first oscillator; the input end of the first oscillator receives an input signal, and the output end is connected to the second transmitting antenna.

7. The millimeter wave isolation-based BUCK conversion circuit according to any one of claims 2 to 4, characterized in that: The first millimeter wave receiving end includes a receiving end power amplifier and a detector; the input end of the receiving end power amplifier is connected to the first receiving antenna, and the output end thereof is connected to the input end of the detector; Alternatively, the first millimeter wave receiving end includes a receiving end power amplifier and a mixer; the input end of the receiving end power amplifier is connected to the first receiving antenna, the first output end thereof is connected to the first input end of the mixer, and the second output end thereof is connected to the second input end of the mixer; Or the first millimeter wave receiving end includes a receiving end power amplifier, a mixer and a second oscillator; the input end of the receiving end power amplifier is connected to the first receiving antenna, the output end thereof is connected to the first input end of the mixer, and the output end of the second oscillator is connected to the second input end of the mixer.

8. The millimeter wave isolation-based BUCK conversion circuit according to any one of claims 2 to 4, characterized in that: The second millimeter wave receiving end includes a receiving end power amplifier and a detector; the input end of the receiving end power amplifier is connected to the second receiving antenna, and the output end thereof is connected to the input end of the detector; Alternatively, the second millimeter wave receiving end includes a receiving end power amplifier and a mixer; the input end of the receiving end power amplifier is connected to the second receiving antenna, the first output end thereof is connected to the first input end of the mixer, and the second output end thereof is connected to the second input end of the mixer; Or the second millimeter wave receiving end includes a receiving end power amplifier, a mixer and a second oscillator; the input end of the receiving end power amplifier is connected to the second receiving antenna, the output end thereof is connected to the first input end of the mixer, and the output end of the second oscillator is connected to the second input end of the mixer.

9. The millimeter wave isolation-based BUCK conversion circuit according to claim 1, wherein: The control circuit includes an off-time blanking unit, a control terminal and an operation unit, an SR trigger, a constant on-time unit, a control terminal logic level shifter, and an error detection unit; The feedback input terminal of the control circuit and the output terminal of the off-time blanking unit are respectively connected to the input terminal of the control terminal and the operation unit; the output terminal of the control terminal and the operation unit are connected to the S terminal of the SR trigger; the constant on-time unit is connected to the R terminal of the SR trigger; the Q terminal of the SR trigger is connected to the input terminal of the control terminal logic level shifter; The output end of the control end logic level shifter is connected to the output end of the control circuit; The output end of the error detection unit is connected to the control end logic level shifter; the input end of the error detection unit and the feedback input end of the control circuit are respectively connected to the second transmission channel of the millimeter wave isolator.

10. The millimeter wave isolation-based BUCK conversion circuit according to claim 9, characterized in that: The control circuit further includes a control terminal bias and reference unit, a control terminal undervoltage lockout unit, and an overvoltage protection unit; The control end bias and reference unit are respectively connected to the off-time blanking unit, the control end and operation unit, the SR trigger, the constant on-time unit, the control end logic level shifter, the error detection unit, the control end undervoltage lockout unit and the overvoltage protection unit; the control end undervoltage lockout unit and the overvoltage protection unit are respectively connected to the control end logic level shifter.

11. The millimeter wave isolation-based BUCK conversion circuit according to claim 1, wherein: The driving and logic module includes a driving end logic level shifter, a driving chain unit, a comparator and a driving end AND operation unit; The input end of the driving and logic module, the driving end logic level shifter, the driving chain unit and the output end of the driving and logic module are connected in sequence; The feedback input terminal of the driving and logic module is connected to the negative input terminal of the comparator; the output terminal of the comparator and the error signal output terminal of the driving end logic level shifter are respectively connected to the input terminal of the driving end and the operation unit; the output terminal of the driving end and the operation unit is connected to the second transmission channel.

12. The millimeter wave isolation-based BUCK conversion circuit according to claim 11, wherein: The driving and logic module further includes a minimum on-time output unit and a clock generation unit; The input end of the driving and logic module is connected to the driving end logic level shifter via the minimum on-time output unit; and the clock generation unit is connected to the driving end logic level shifter.

13. The millimeter wave isolation-based BUCK conversion circuit according to claim 11, wherein: The driving and logic module further includes a driving end bias and reference unit, a driving end undervoltage lockout unit, and an overcurrent protection unit; the driving end bias and reference unit are respectively connected to the driving end logic level shifter, the driving chain unit, the comparator, the driving end and operation unit, the driving end undervoltage lockout unit, and the overcurrent protection unit; The driving-end undervoltage lockout unit and the overcurrent protection unit are respectively connected to the driving-end logic level shifter.

14. A power supply, characterized in that: The invention comprises the buck conversion circuit based on millimeter wave isolation as described in any one of claims 1 to 13.

15. The power supply according to claim 14, wherein: The BUCK conversion circuit is a high-voltage bridge BUCK conversion circuit; The control circuit is the control signal circuit of the upper bridge and the control signal circuit of the lower bridge in the high-voltage bridge BUCK conversion circuit; the high-voltage drive circuit is the high-voltage device of the upper bridge and the high-voltage device of the lower bridge in the high-voltage bridge BUCK conversion circuit.

16. An electronic device, characterized in that: A power supply comprising the power supply according to claim 14 or 15.

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