DCDC converter based on millimeter wave isolation and power supply equipment

Abstract

The utility model provides a DCDC converter based on millimeter wave isolation, a power supply device, and the DCDC converter comprises a primary side bridge circuit, a transformer, a secondary side bridge circuit, a microcontroller, and a millimeter wave isolation gate driver. The primary side bridge circuit is connected with the secondary side bridge circuit through the transformer; and the microcontroller is respectively connected with the primary side bridge circuit and the secondary side bridge circuit through the millimeter wave isolation gate driver. According to the utility model, based on the characteristics of millimeter waves, isolation driving with higher speed, smaller delay, higher efficiency and higher safety and reliability can be realized, and the isolation driving performance is significantly improved; meanwhile, peripheral circuits can be reduced, and the size of the converter is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to power converter technical field, concretely relates to DCDC converter, power equipment based on millimeter wave isolation. BACKGROUND

[0002] A full-bridge DC-DC converter is a power electronic device used to convert a DC voltage into another DC voltage. The full-bridge structure uses four switching devices (such as MOSFET or IGBT), which can achieve high-efficiency power conversion and support bidirectional current flow. Such converters are widely used in electric vehicles, renewable energy systems, and power supply fields.

[0003] A full-bridge DC-DC converter is typically composed of four switching devices, which are connected between the two poles of an input DC power source. These switches can be MOSFET, IGBT, SiC, GaN, etc., used to control the on-off and direction of current flow; through appropriate control signals, the upper and lower bridge arms are alternately turned on and off, forming a controllable circuit structure. The working principle of the full-bridge drive circuit is based on pulse width modulation (PWM) technology, which adjusts the on-time and off-time of the switching tube to control the size and waveform of the output voltage.

[0004] In recent years, with the growth of sales of environmentally friendly vehicles, power devices such as IGBT (Insulated Gate Bipolar Transistor) or SiC (Silicon Carbide), GaN (Gallium Nitride) are increasingly used to drive switching devices for electric or hybrid vehicle systems that use high-voltage signals (such as motor drives or high-voltage conversions).

[0005] MOSFET / IGBT / SiC / GaN gate drive chips in the prior art may contain isolation media, especially for isolating between the signal receiving circuit and the output circuit inside the IGBT / SiC / GaN gate drive chip. The commonly used isolation media currently include: optocoupler components, NVE magnetic switches, GMR giant magnetoresistance, etc., which can be presented in the form of a separate signal isolator (IC). Among them, the optocoupler is a set of devices that use light as a medium to transmit electrical signals, and its function is to isolate between the input circuit and the output circuit, and to transmit electrical signals through the isolation layer when needed. Optocoupler devices are widely used in electrical isolation, level conversion, drive circuits, and industrial communication, but due to the problem of parasitic input-output capacitance, the optocoupler has weak ability to resist common-mode transient immunity (CMTI); in addition, speed limitation, high power consumption, and component aging are also major problems. SUMMARY

[0006] The utility model wants to solve the technical problem that provides DCDC converter, power supply equipment based on millimeter wave isolation, can improve the isolation transmission speed, and the isolation effect is safer and more reliable, greatly optimizes the isolation drive performance.

[0007] In order to solve the above technical problem, the first technical scheme of the utility model is:

[0008] DCDC converter based on millimeter wave isolation, including: primary side bridge circuit, transformer, secondary side bridge circuit, microcontroller and millimeter wave isolation gate drive,

[0009] The primary side bridge circuit is connected with the secondary side bridge circuit through the transformer, and the microcontroller is connected with the primary side bridge circuit and the secondary side bridge circuit through the millimeter wave isolation gate drive.

[0010] Optionally, the millimeter wave isolation gate drive includes main control module, millimeter wave isolation module and gate drive control module connected in sequence.

[0011] The signal input end of the main control module is connected with the microcontroller, and the gate drive control module is connected with the primary side bridge circuit and the secondary side bridge circuit.

[0012] Optionally, the millimeter wave isolation module includes millimeter wave transmitter and millimeter wave receiver.

[0013] The millimeter wave transmitter is connected with the main control module, the millimeter wave receiver is connected with the gate drive control module, and the millimeter wave transmitter and the millimeter wave receiver are wirelessly connected.

[0014] Optionally, the main control module includes first control unit and first level conversion unit, and the gate drive control module includes second control unit, second level conversion unit and gate drive unit.

[0015] The first control unit, the first level conversion unit, the millimeter wave isolation module, the second control unit, the second level conversion unit and the gate drive unit are connected in sequence.

[0016] Optionally, the millimeter wave isolation gate drive further includes first undervoltage lock module, first linear voltage stabilizer, second undervoltage lock module and second linear voltage stabilizer.

[0017] One end of the first undervoltage lock module is connected with the power input end, and the other end is connected with the first control unit, one end of the first linear voltage stabilizer is connected with the power input end, and the other end is connected with the first level conversion unit and the millimeter wave transmitter.

[0018] One end of the second under-voltage lockout module is connected with the power input end, and the other end is connected with the second control unit; one end of the second linear voltage regulator is connected with the power input end, and the other end is connected with the second level conversion unit and the millimeter wave receiver respectively.

[0019] Optionally, the primary bridge circuit comprises a switch tube S1, a switch tube S2, a switch tube S3 and a switch tube S4.

[0020] The control end of the switch tube S1, the switch tube S2, the switch tube S3 and the switch tube S4 is connected with the driving end of the millimeter wave isolation gate driver; the first end of the switch tube S1 is connected with the positive pole of the power input end, and the second end is connected with the first end of the switch tube S2; the second end of the switch tube S2 is connected with the negative pole of the power input end; the first end of the switch tube S3 is connected with the positive pole of the power input end, and the second end is connected with the first end of the switch tube S4; the second end of the switch tube S2 is connected with the negative pole of the power input end.

[0021] The same end of the primary coil of the transformer is connected with the second end of the switch tube S1; the different end of the primary coil is connected with the second end of the switch tube S3.

[0022] Optionally, the secondary bridge circuit comprises a switch tube S5, a switch tube S6, a switch tube S7 and a switch tube S8.

[0023] The control end of the switch tube S5, the switch tube S6, the switch tube S7 and the switch tube S8 is connected with the driving end of the millimeter wave isolation gate driver; the first end of the switch tube S5 is connected with the positive pole of the power input end, and the second end is connected with the first end of the switch tube S6; the second end of the switch tube S6 is connected with the negative pole of the power input end; the first end of the switch tube S7 is connected with the positive pole of the power input end, and the second end is connected with the first end of the switch tube S8; the second end of the switch tube S6 is connected with the negative pole of the power input end.

[0024] The same end of the secondary coil of the transformer is connected with the second end of the switch tube S7; the different end of the secondary coil is connected with the second end of the switch tube S5.

[0025] Optionally, the switch tube S1, the switch tube S2, the switch tube S3, the switch tube S4, the switch tube S5, the switch tube S6, the switch tube S7 and the switch tube S8 are MOS tubes; the first end is the drain, the second end is the source, and the control end is the gate.

[0026] Optionally, the switch tube S1, the switch tube S2, the switch tube S3, the switch tube S4, the switch tube S5, the switch tube S6, the switch tube S7 and the switch tube S8 are provided with a capacitor in parallel between the drain and the source.

[0027] The second technical solution provided by the utility model has the beneficial effects that:

[0028] A power supply device comprising the above-mentioned DCDC converter based on millimeter wave isolation.

[0029] The DCDC converter of the utility model has the beneficial effects that: the microcontroller and the primary / secondary bridge circuit are driven by the millimeter wave isolation gate driver for isolated transmission of the driving signal; compared with the existing isolation type DCDC converter, higher speed, smaller delay, higher efficiency and safer and more reliable isolation driving can be realized based on the characteristics of millimeter waves, the isolation driving performance is significantly improved; in addition, the use of the millimeter wave isolation gate driver can also reduce the use of peripheral components, further improve the reliability while also reducing the size of the converter. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The utility model provides a kind of structure block diagram of DCDC converter based on millimeter wave isolation for the embodiment of the utility model;

[0031] Figure 2 The utility model provides a kind of structure block diagram of DCDC converter based on millimeter wave isolation for the embodiment of the utility model;

[0032] Figure 3 It is the schematic diagram of frequency conversion control waveform in the specific embodiment of the utility model;

[0033] Figure 4 The utility model provides a kind of structure composition and connection schematic diagram of millimeter wave isolation gate driver in DCDC converter based on millimeter wave isolation for the embodiment of the utility model. DETAILED DESCRIPTION

[0034] To explain the possible application scene, technical principle, the specific scheme that can be implemented of the utility model in detail, can realize purpose and effect etc., the following is explained in detail in conjunction with the specific embodiment listed and with the drawings.The embodiment recorded in this paper is only used to more clearly explain the technical scheme of the utility model, therefore only as example, and this can not be used to limit the protection scope of the utility model.

[0035] The term "embodiment" is mentioned in this document means that the specific features, structures or properties described in combination with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0036] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms in this document is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0037] In the description of the present application, the phrase "and / or" is a description of the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this document generally represents a "or" logical relationship between the associated objects before and after.

[0038] In the present application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary or secondary, or order relationship between the entities or operations.

[0039] Without more limitations, in the present application, the use of "includes", "contains", "has" or other similar expressions in the sentence is intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of other elements in the process, method or product including the described elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0040] As the same as the understanding in the "Guidelines for Examination", in the present application, the expressions "greater than", "less than", "exceed" and the like are understood as not including the number; the expressions "above", "below", "within" and the like are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly limited.

[0041] In the description of the embodiments of the utility model, the space related expressions used, such as '' center '' '' longitudinal '' '' transverse '' '' length '' '' width '' '' thickness '' '' upper '' '' lower '' '' front '' '' rear '' '' left '' '' right '' '' vertical '' '' horizontal '' '' perpendicular '' '' top '' '' bottom '' '' inner '' '' outer '' '' clockwise '' '' counterclockwise '' '' axial '' '' radial '' '' circumferential '' and the like, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or drawing, only for the convenience of describing the specific embodiment of the utility model or for the reader to understand, and not indicate or imply that the indicated device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, therefore, it cannot be understood as a limitation on the embodiments of the utility model.

[0042] Unless otherwise explicitly specified or limited, in the description of the embodiments of the utility model, the terms such as '' installation '' '' connection '' '' fixed '' '' set '' should be understood broadly.For example, the '' connection '' can be fixed connection, or detachable connection, or integrated setting, which can be mechanical connection, or electrical connection, or communication connection, which can be directly connected, or indirectly connected through intermediate medium, which can be the communication or interaction relationship between two elements.For the skilled in the art to which the utility model belongs, the specific meaning of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0043] Please refer to Figure 1 , the embodiment of the utility model is:

[0044] The embodiment provides a DCDC converter based on millimeter wave isolation, as shown in the figure, comprising a primary side bridge circuit, a transformer, a secondary side bridge circuit, a microcontroller and a millimeter wave isolation gate driver; Figure 1 The primary side bridge circuit is connected with the secondary side bridge circuit through the transformer, and the microcontroller is connected with the primary side bridge circuit and the secondary side bridge circuit through the millimeter wave isolation gate driver.

[0045] The primary side bridge circuit is connected with the secondary side bridge circuit through the transformer, and the microcontroller is connected with the primary side bridge circuit and the secondary side bridge circuit through the millimeter wave isolation gate driver.

[0046] It can be understood that the full bridge circuit composed of the primary side bridge circuit and the secondary side bridge circuit controls the opening and closing of the switch by the microcontroller, and realizes the regulation of the current and voltage of the load, that is, the output of the secondary side.In this embodiment, the driving control signal output by the microcontroller for controlling the full bridge circuit will drive the switching device of the full bridge circuit in an isolated manner through the millimeter wave isolation gate driver.

[0047] Therefore, compared with the DCDC converter adopting the traditional isolation gate drive, the DCDC converter based on the millimeter wave isolation can realize higher speed, smaller delay, higher efficiency and safer and more reliable transmission of the drive control signal, and significantly improve the isolation drive performance. In addition, the millimeter wave isolation gate driver can also reduce the use of peripheral components, further improve the reliability and reduce the volume.

[0048] In some specific embodiments of the present embodiment, as shown in Figure 2 The primary side bridge circuit specifically includes a switch tube S1, a switch tube S2, a switch tube S3 and a switch tube S4.

[0049] The control end of the switch tube S1, the switch tube S2, the switch tube S3 and the switch tube S4 is connected with the driving end of the millimeter wave isolation gate driver; the first end of the switch tube S1 is connected with the positive pole of the power input end, and the second end thereof is connected with the first end of the switch tube S2; the second end of the switch tube S2 is connected with the negative pole of the power input end; the first end of the switch tube S3 is connected with the positive pole of the power input end, and the second end thereof is connected with the first end of the switch tube S4; the second end of the switch tube S2 is connected with the negative pole of the power input end.

[0050] The same end of the primary side coil of the transformer is connected with the second end of the switch tube S1, that is, connected between the switch tube S1 and the switch tube S2; the different end of the primary side coil is connected with the second end of the switch tube S3, that is, connected between the switch tube S3 and the switch tube S4.

[0051] Correspondingly, as shown in Figure 2 The secondary side bridge circuit specifically includes a switch tube S5, a switch tube S6, a switch tube S7 and a switch tube S8.

[0052] The control end of the switch tube S5, the switch tube S6, the switch tube S7 and the switch tube S8 is connected with the driving end of the millimeter wave isolation gate driver; the first end of the switch tube S5 is connected with the positive pole of the power input end, and the second end thereof is connected with the first end of the switch tube S6; the second end of the switch tube S6 is connected with the negative pole of the power input end; the first end of the switch tube S7 is connected with the positive pole of the power input end, and the second end thereof is connected with the first end of the switch tube S8; the second end of the switch tube S6 is connected with the negative pole of the power input end.

[0053] The same end of the secondary side coil of the transformer is connected with the second end of the switch tube S7, that is, connected between the switch tube S7 and the switch tube S8; the different end of the secondary side coil is connected with the second end of the switch tube S5, that is, connected between the switch tube S5 and the switch tube S6.

[0054] As a preferred example, as shown in Figure 2 The switch tubes S1, S2, S3, S4, S5, S6, S7 and S8 all adopt MOS tubes as a preferred example, as shown in

[0055] The switch tubes S1, S2, S3, S4, S5, S6, S7 and S8 all adopt MOS tubes as a preferred example, as shown in Figure 2 The switch tubes S1, S2, S3, S4, S5, S6, S7 and S8 all adopt MOS tubes as a preferred example, as shown in

[0056] In combination with Figure 2 It is understood that the DCDC converter based on millimeter wave isolation described in the above specific embodiments has the working principle as follows:

[0057] When the PWM1, PWM4, PWM6 and PWM7 pins of the microcontroller output high level, the output high level drive control signal will pass through the millimeter wave isolation gate drive, drive the corresponding switch tube S1, switch tube S4, switch tube S6 and switch tube S7 to turn on, then the current flows from the power input terminal VBUS through the switch tube S1, the primary winding of the transformer and the switch tube S4 to form a current loop; at the same time, the secondary winding current of the transformer flows through the switch tube S6, the load and the switch tube S7 to form a current loop.

[0058] When the PWM2, PWM3, PWM5 and PWM8 pins of the microcontroller output high level, the output high level drive control signal will pass through the millimeter wave isolation gate drive, drive the corresponding switch tube S2, switch tube S3, switch tube S5 and switch tube S8 to turn on, then the current flows from the power input terminal VBUS through the switch tube S2, the primary winding of the transformer and the switch tube S3 to form a current loop; at the same time, the secondary winding current of the transformer flows through the switch tube S5, the load and the switch tube S8 to form a current loop.

[0059] The millimeter wave isolation based DCDC converter provided by the embodiment uses a millimeter wave isolation gate driver to perform isolated transmission of a driving signal between a microcontroller and a primary / secondary bridge circuit; compared with an isolation driver used in an existing DCDC converter, higher speed, smaller delay, higher efficiency and safer and more reliable isolation driving can be achieved based on the millimeter wave, and the isolation driving performance is significantly improved; in addition, the use of the millimeter wave isolation gate driver can also reduce the use of peripheral components, further improve reliability and reduce volume.

[0060] In the following, the working principle of the millimeter wave isolation based DCDC converter provided by the embodiment in driving control will be further described with reference to the variable frequency control waveform diagram of the embodiment. Figure 3

[0061] Here, the dead time is increased for analysis convenience, and the dead time is relatively short compared with the entire cycle in actual application. Figure 3 V gS refers to the voltage difference between the gate and the source in the switch tube, that is, the minimum gate voltage required for conduction; V DS refers to the voltage difference between the drain and the source in the switch tube; V AB is the voltage difference between points A and B; V cr is the voltage difference between the resonant capacitors.

[0062] As can be seen from Figure 3 , in the (t0-t1) time period: the voltage between the drain and the source of the switch tube S1 and the switch tube S4 is approximately 0, and the switch tube S1 and the switch tube S4 realize zero voltage turn-on. Wherein, t1 is the low-voltage side resonant current zero-crossing point, after which the resonant current starts to reverse, at this time the resonant capacitor voltage is maximum.

[0063] In the (t1-t2) time period: the voltage across the transformer is clamped by the output voltage HV, and the energy is transferred from the primary side to the secondary side, and at t2 the energy transfer is completed, and the transformer excitation inductance is added to the resonance.

[0064] In the (t3-t4) time period: at t3, the switch tube S1 and the switch tube S4 start to close, the capacitor Cs1 and the capacitor Cs4 start to charge, and the capacitor Cs2 and the capacitor Cs3 start to discharge, and at t4 the capacitor charging and discharging is completed, and the switch tube S2 and the switch tube S3 are turned on, which has the condition of zero voltage turn-on.

[0065] In the (t4-t5) time period: the switch tube S1 and the switch tube S4 are closed, and the switch tube S2 and the switch tube S4 are turned on, which has the condition of zero voltage turn-on.

[0066] When working in the forward direction, Figure 2 ​The resonant circuit composed of Lp and Cr of the transformer presents different impedance to different frequency of the fundamental wave, the voltage drop on the resonant circuit changes with the frequency, and the output voltage HV transmitted to the load side changes accordingly, which is the basic principle of the LLC resonant converter to realize frequency regulation gain.

[0067] Similarly, the DCDC converter adopts frequency control, and when working in the reverse mode, the working principle and soft switching process are the same as those of the forward mode.

[0068] Please refer to Figure 4 The second embodiment of the utility model is:

[0069] The embodiment is further extended based on the first embodiment, and the millimeter wave isolation gate driver is refined.

[0070] The DCDC converter based on millimeter wave isolation of the embodiment comprises a master control module, a millimeter wave isolation module and a gate drive control module connected in sequence; a signal input end of the master control module is connected with the microcontroller; the gate drive control module is connected with the primary side bridge circuit and the secondary side bridge circuit respectively.

[0071] The millimeter wave isolation module comprises a millimeter wave transmitter and a millimeter wave receiver; the millimeter wave transmitter comprises a millimeter wave transmitting unit and a millimeter wave transmitting antenna; the millimeter wave receiver comprises a millimeter wave receiving unit and a millimeter wave receiving antenna; the millimeter wave transmitting unit, the millimeter wave transmitting antenna, the millimeter wave receiving antenna and the millimeter wave receiving unit are connected in sequence, wherein the millimeter wave transmitting antenna and the millimeter wave receiving antenna are connected based on millimeter wave technology wireless communication.

[0072] The millimeter wave transmitter is further connected with the master control module; and the millimeter wave receiver is further connected with the gate drive control module.

[0073] In some specific embodiments, as Figure 4 The master control module comprises a first control unit Control Logic and a first level shifting unit Level Shifter on the same side of the millimeter wave transmitter in the figure; the gate drive control module comprises a second control unit Control Logic, a second level shifting unit Level Shifter and a gate drive unit on the same side of the millimeter wave receiver in the figure; the first control unit, the first level shifting unit, the millimeter wave isolation module (i.e. the millimeter wave isolation device in the figure), the second control unit, the second level shifting unit and the gate drive unit are connected in sequence. In addition, the signal input (IN+, IN-) is also connected with the first control unit.

[0074] The above-mentioned millimeter wave isolation gate driver, in combination Figure 4 It is understood that the working principle is as follows:

[0075] The signal input end (IN+, IN-) inputs a signal to the first control unit (i.e. Control Logic on the left side in the figure), and the signal is subjected to logic level conversion by the first level conversion unit (i.e. Level Shifter on the left side in the figure) to obtain an input level signal, and then transmitted to the millimeter wave receiver by the millimeter wave transmitter in a millimeter wave wireless manner. After the millimeter wave receiver receives the output level signal, the output level signal is transmitted to the second control unit (i.e. Control Logic on the right side in the figure). The second control unit submits the input level signal to the second level conversion unit (i.e. Level Shifter on the right side in the figure) for logic level conversion to obtain an output drive signal, and outputs the output drive signal through the drive output end (OUTH, OUTL).

[0076] The signal input end (IN+, IN-) input signal refers to a signal output by a microcontroller to control a transistor in the primary / secondary bridge circuit, such as a PWM (Pulse Width Modulation) signal. The input level signal refers to a signal with high and low levels determined based on the input signal, which can be a square wave signal. The output level signal refers to an output high and low level signal after wireless transmission by the millimeter wave isolation module. The millimeter wave transmission method can avoid the defects of the optical coupling component isolation, thereby ensuring the reliability of the entire circuit from the signal transmission, and achieving normal driving of the transistor in the primary / secondary bridge circuit through the above control.

[0077] In some embodiments, as shown in Figure 4 The millimeter wave isolation gate driver further includes an Active Shut-down circuit. One end of the Active Shut-down circuit is connected to the power input end VCC2, and the other end is connected to the second level conversion unit (i.e. Level Shifter on the right side in the figure).

[0078] Here, through the Active Shut-down circuit, it can be ensured that all processes or tasks are completed before the converter device is shut down, thereby ensuring the stability of the device system.

[0079] In some embodiments, as shown in Figure 4As shown, the gate drive unit specifically includes MOS tube Q1, MOS tube Q2 and MOS tube Q3; the gates of the MOS tube Q1, MOS tube Q2 and MOS tube Q3 are connected with the second level conversion unit respectively; the source of the MOS tube Q1 is grounded, the drain is connected with the Active Shut-down circuit and serves as a driving output end OUTL; the sources of the MOS tube Q2 and the MOS tube Q3 are connected and serve as a driving output end OUTH, and the drains thereof are connected with the power input end VCC2 respectively.

[0080] Here, it can be understood that when driving the transistor to be driven, i.e., the primary / secondary bridge circuit, it is mainly divided into high-level driving and low-level driving. Among them, MOS tube Q1 and MOS tube Q2 form a high-level output circuit, and the second level conversion unit can realize high-level output by controlling the gate thereof. The low-level output circuit composed of MOS tube Q3, the second level conversion unit can realize low-level output by controlling the gate thereof. In particular, through the communication of the second control unit and the second level conversion unit, the conduction time of MOS tube Q1, MOS tube Q2 and MOS tube Q3 can be controlled, and the time of outputting high and low levels can be controlled.

[0081] In some specific embodiments, as shown in the figure, Figure 4 As shown, the millimeter wave isolation gate driver further includes a first undervoltage lockout module UVLO1, a first linear voltage regulator LDO1, a second undervoltage lockout module UVLO2 and a second linear voltage regulator LDO2;

[0082] One end of the first undervoltage lockout module UVLO1 is connected with the power input end VCC1, and the other end is connected with the first control unit (i.e., the Control Logic located on the left side in the figure); one end of the first linear voltage regulator LDO1 is connected with the power input end VCC1, and the other end is connected with the first level conversion unit (i.e., the LevelShifter located on the left side in the figure) and the millimeter wave transmitter respectively;

[0083] One end of the second undervoltage lockout module UVLO2 is connected with the power input end VCC2, and the other end is connected with the second control unit (i.e., the Control Logic located on the right side in the figure); one end of the second linear voltage regulator LDO2 is connected with the power input end VCC2, and the other end is connected with the second level conversion unit (i.e., the LevelShifter located on the right side in the figure) and the millimeter wave receiver respectively.

[0084] The first under-voltage lock module UVLO1 and the second under-voltage lock module UVLO2 are arranged to feed back and inform when under-voltage or other abnormal conditions occur at the corresponding power input terminal VCC1 and the power input terminal VCC2, thereby controlling the external transistor to be turned off, and ensuring the safety of the circuit.

[0085] The first linear voltage stabilizer LDO1 and the second linear voltage stabilizer LDO2 are arranged to filter interference signals from the corresponding power input terminal VCC1 and the power input terminal VCC2, and ensure the stability of the output voltage.

[0086] The millimeter wave isolation gate driver structure for the DCDC converter has the advantages of simple structure and perfect function, can realize efficient, safe and reliable isolation driving of the gate driver based on the millimeter wave technology, and can reduce the use of peripheral components and the size of the DCDC converter.

[0087] Embodiment three

[0088] The power supply device based on the millimeter wave isolation DCDC converter is further developed based on any of the above embodiments.

[0089] The structure and working principle of the millimeter wave isolation DCDC converter will not be repeated here, and details can be referred to the description of the above embodiments.

[0090] The DCDC converter used in the power supply device can realize efficient, safe and reliable isolation driving based on the millimeter wave technology, thereby significantly improving the reliability of energy conversion driving, and ensuring the DCDC conversion reliability of the power supply device.

[0091] In summary, the millimeter wave isolation DCDC converter and the power supply device have the microcontroller and the primary / secondary bridge circuit driven by the millimeter wave isolation gate driver for isolation transmission of the driving signal, can realize higher speed, smaller delay, higher efficiency and safer and more reliable isolation driving based on the characteristics of the millimeter wave, significantly improve the isolation driving performance, and further improve the reliability while reducing the size of the converter by using the millimeter wave isolation gate driver.

[0092] The above description is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation or direct or indirect application in the related technical field based on the content of the utility model specification and drawings is also included in the patent protection range of the utility model.

Claims

1. A DCDC converter based on millimeter wave isolation, characterized in that, The application relates to a millimeter wave isolation gate driver. The primary side bridge circuit is connected with the secondary side bridge circuit through the transformer; the microcontroller is connected with the primary side bridge circuit and the secondary side bridge circuit through the millimeter wave isolation gate driver. The millimeter wave isolation gate driver comprises a master control module, a millimeter wave isolation module and a gate drive control module connected in sequence.

2. The millimeter-wave-isolation-based DCDC converter of claim 1, wherein, The signal input end of the master control module is connected with the microcontroller; the gate drive control module is connected with the primary side bridge circuit and the secondary side bridge circuit respectively. The millimeter wave isolation module comprises a millimeter wave transmitter and a millimeter wave receiver.

3. The mmWave-isolation-based DCDC converter of claim 2, wherein, The millimeter wave transmitter is connected with the master control module; the millimeter wave receiver is connected with the gate drive control module; the millimeter wave transmitter and the millimeter wave receiver are wirelessly connected. The master control module comprises a first control unit and a first level conversion unit; the gate drive control module comprises a second control unit, a second level conversion unit and a gate drive unit.

4. The mmWave-isolation-based DCDC converter of claim 3, wherein, The first control unit, the first level conversion unit, the millimeter wave isolation module, the second control unit, the second level conversion unit and the gate drive unit are connected in sequence. The millimeter wave isolation gate driver further comprises a first under-voltage lock module, a first linear voltage stabilizer, a second under-voltage lock module and a second linear voltage stabilizer.

5. The mmWave-isolation-based DCDC converter of claim 4, wherein, One end of the first under-voltage lock module is connected with a power input end, and the other end is connected with the first control unit; one end of the first linear voltage stabilizer is connected with the power input end, and the other end is connected with the first level conversion unit and the millimeter wave transmitter respectively. One end of the second under-voltage lock module is connected with the power input end, and the other end is connected with the second control unit; one end of the second linear voltage stabilizer is connected with the power input end, and the other end is connected with the second level conversion unit and the millimeter wave receiver respectively. The primary side bridge circuit comprises a switch tube S1, a switch tube S2, a switch tube S3 and a switch tube S4.

6. The millimeter-wave-isolation-based DCDC converter of claim 1, wherein, The control ends of the switch tube S1, the switch tube S2, the switch tube S3 and the switch tube S4 are connected with the driving ends of the millimeter wave isolation gate driver respectively; the first end of the switch tube S1 is connected with the positive pole of a power input end, and the second end is connected with the first end of the switch tube S2; the second end of the switch tube S2 is connected with the negative pole of the power input end; the first end of the switch tube S3 is connected with the positive pole of the power input end, and the second end is connected with the first end of the switch tube S4; the second end of the switch tube S2 is connected with the negative pole of the power input end. The same name end of the primary side coil of the transformer is connected with the second end of the switch tube S1; the different name end of the primary side coil is connected with the second end of the switch tube S3. The secondary side bridge circuit comprises a switch tube S5, a switch tube S6, a switch tube S7 and a switch tube S8.

7. The millimeter-wave-isolation-based DCDC converter of claim 6, wherein, ​ The control end of the switch tube S5, the switch tube S6, the switch tube S7 and the switch tube S8 is connected with the driving end of the millimeter wave isolation gate driver respectively; the first end of the switch tube S5 is connected with the positive pole of the power input end, and the second end thereof is connected with the first end of the switch tube S6; the second end of the switch tube S6 is connected with the negative pole of the power input end; the first end of the switch tube S7 is connected with the positive pole of the power input end, and the second end thereof is connected with the first end of the switch tube S8; the second end of the switch tube S6 is connected with the negative pole of the power input end; The same end of the secondary coil of the transformer is connected with the second end of the switch tube S7; and the different end of the secondary coil is connected with the second end of the switch tube S5.

8. The millimeter-wave-isolation-based DCDC converter of claim 7, wherein, The switch tube S1, the switch tube S2, the switch tube S3, the switch tube S4, the switch tube S5, the switch tube S6, the switch tube S7 and the switch tube S8 are MOS tubes; the first end is a drain, the second end is a source, and the control end is a gate.

9. The millimeter-wave-isolation-based DCDC converter of claim 7, wherein, A capacitor is arranged between the drain and the source in each of the switch tube S1, the switch tube S2, the switch tube S3, the switch tube S4, the switch tube S5, the switch tube S6, the switch tube S7 and the switch tube S8.

10. A power supply device characterized by comprising: The DCDC converter based on millimeter wave isolation comprises the DCDC converter based on millimeter wave isolation according to any one of claims 1 to 9.

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