Grid driver power supply

Abstract

The utility model discloses a grid driver power supply, which comprises an input driving circuit, an output circuit and a grid driving circuit, and the first output end of the output circuit is connected with the input end of the grid driving circuit. The input driving circuit is connected with the first input end of the output circuit through a first isolation signal channel circuit; the first isolation signal channel circuit is a millimeter wave isolator; in the grid driver power supply, the input driving circuit and the output circuit are isolated through the millimeter wave isolator, and compared with the existing optical isolation and magnetic isolation, the millimeter wave isolation mode can realize higher signal transmission speed and higher isolation voltage; the high isolation voltage can be realized while the signal transmission speed is improved, and the problems of low speed and low isolation voltage of the existing optical isolation and magnetic isolation are well solved.

Description

Technical Field

[0001] The utility model relates to the field of gate driver power supplies, in particular to a gate driver power supply. Background Art

[0002] In the prior art, there are two ways to isolate the gate driver power supply, one is optical coupling isolation and the other is magnetic isolation. Optical coupling isolation uses optical coupling devices to convert electrical signals into optical signals, and then converts them into electrical signals for transmission; magnetic isolation uses the principle of electromagnetic conversion to transmit signals. However, both optical isolation and magnetic isolation have the problems of slow speed and low isolation voltage. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a gate driver power supply, which can improve the signal transmission speed and realize a higher isolation voltage at the same time.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is:

[0005] A gate driver power supply comprises an input drive circuit, an output circuit and a gate drive circuit, wherein a first output terminal of the output circuit is connected to an input terminal of the gate drive circuit, and the input drive circuit is connected to the first input terminal of the output circuit via a first isolation signal channel circuit;

[0006] The first isolation signal channel circuit is a millimeter wave isolator.

[0007] Furthermore, it also includes a feedback circuit, wherein the second output end of the output circuit is connected to one end of the feedback circuit, and the other end of the feedback circuit is connected to the input drive circuit via a second isolation signal channel circuit;

[0008] The second isolation signal channel circuit is a millimeter wave isolator.

[0009] Furthermore, it also includes a data source, and the first output terminal of the gate driving circuit is connected to the data source via a third isolation signal channel circuit;

[0010] The third isolation signal channel circuit is a millimeter wave isolator.

[0011] Further, it also includes a power tube;

[0012] The second output terminal of the gate driving circuit is connected to the load through the power tube.

[0013] Furthermore, it also includes a rectifier circuit and an output control circuit;

[0014] The output end of the first isolation signal channel circuit is connected to the input end of the rectifier circuit, and the first output end of the rectifier circuit is connected to the first input end of the output circuit;

[0015] The second output terminal of the rectifier circuit is connected to the second input terminal of the output circuit.

[0016] Furthermore, it also includes a controller;

[0017] The feedback circuit includes a sensing circuit;

[0018] One end of the sensing circuit is connected to the second output end of the output circuit, and the other end of the sensing circuit is connected to one end of the second isolation signal channel circuit;

[0019] The other end of the second isolation signal channel circuit is connected to the input end of the controller;

[0020] The output end of the controller is connected to the input end of the input driving circuit.

[0021] Further, the millimeter wave isolator includes a transmitting end and a receiving end;

[0022] The transmitting end and the receiving end perform wireless communication via millimeter waves;

[0023] The transmitting end and the receiving end both include a voltage-controlled oscillator, a power amplifier or a buffer amplifier and an antenna which are connected in sequence.

[0024] Furthermore, the gate driving circuit is in a driving mode of driving upper and lower double tubes in a half-bridge mode, a driving mode of driving a single tube, or a driving mode of driving an H-bridge.

[0025] Further, when the gate drive circuit is in a driving mode of an upper and lower double-tube half-bridge, the gate drive circuit includes a first receiving circuit, a first buffer amplifier, a bootstrap circuit, and a second buffer amplifier connected in sequence, and a second receiving circuit and a third buffer amplifier connected in sequence;

[0026] The power tube comprises an upper power tube and a lower power tube;

[0027] The first output end of the output circuit is connected to the input end of the first receiving circuit and the input end of the second receiving circuit respectively;

[0028] The output end of the second buffer amplifier is connected to the gate of the upper power tube;

[0029] The output end of the third buffer amplifier is connected to the gate of the lower power tube;

[0030] The source of the upper power tube and the source of the lower power tube are connected to loads respectively.

[0031] Further, when the gate driving circuit is in a single-tube driving mode, the gate driving circuit includes a receiving circuit, a fourth buffer amplifier and a fifth buffer amplifier connected in sequence;

[0032] The output end of the fifth buffer amplifier is connected to the gate of the power tube;

[0033] The source of the power tube is connected to a load.

[0034] The beneficial effect of the utility model is that in the gate driver power supply, isolation is achieved between the input drive circuit and the output circuit through a millimeter wave isolator. Compared with the existing optical isolation and magnetic isolation, the millimeter wave isolation method can achieve higher signal transmission speed and higher isolation voltage. It can achieve higher isolation voltage while improving the signal transmission speed, and well solve the problems of slow speed and low isolation voltage of existing optical isolation and magnetic isolation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the circuit structure of a gate driver power supply according to an embodiment of the utility model;

[0036] Figure 2 This is a schematic diagram of the circuit structure of a millimeter wave isolator in a gate driver power supply according to an embodiment of the utility model;

[0037] Figure 3 A schematic diagram of a circuit structure of a gate driver power supply according to an embodiment of the utility model;

[0038] Figure 4 This is another circuit structure schematic diagram of a gate driver power supply according to an embodiment of the utility model. DETAILED DESCRIPTION

[0039] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0040] The gate driver power supply of the present application can be applied to various communication devices that require a gate driver power supply, and the following is an explanation through specific implementation methods:

[0041] In an alternative embodiment, please refer to Figure 1 , a gate driver power supply, comprising an input drive circuit, an output circuit and a gate drive circuit, wherein a first output terminal of the output circuit is connected to an input terminal of the gate drive circuit, and the input drive circuit is connected to the first input terminal of the output circuit via a first isolation signal channel circuit;

[0042] The first isolation signal channel circuit is a millimeter wave isolator;

[0043] Wherein, the input drive circuit may be a driver;

[0044] In another optional embodiment, the gate driver power supply further includes a feedback circuit, the second output end of the output circuit is connected to one end of the feedback circuit, and the other end of the feedback circuit is connected to the input drive circuit via a second isolation signal channel circuit;

[0045] The second isolation signal channel circuit is a millimeter wave isolator;

[0046] Among them, it also includes a controller;

[0047] The feedback circuit includes a sensing circuit;

[0048] One end of the sensing circuit is connected to the second output end of the output circuit, and the other end of the sensing circuit is connected to one end of the second isolation signal channel circuit;

[0049] The other end of the second isolation signal channel circuit is connected to the input end of the controller;

[0050] The output end of the controller is connected to the input end of the input driving circuit.

[0051] In this embodiment, if Figure 1 As shown, the DC power input energy passes through the driver, the first isolation signal channel circuit (i.e. Figure 1 The isolated signal channel circuit 1 in the circuit is transmitted to the secondary side, and the secondary side then transmits the energy to the gate driver through the rectification and output circuit, and the sensing circuit and the second isolated signal channel circuit (i.e. Figure 1 The isolated signal channel circuit 2) in the circuit transmits the output voltage signal to the primary side to maintain the stability of the output voltage.

[0052] In another optional embodiment, a data source is further included, and a third isolation signal channel circuit (i.e. Figure 1 The isolation signal channel circuit 3) is connected;

[0053] The third isolation signal channel circuit is a millimeter wave isolator.

[0054] In another optional embodiment, it also includes a power tube;

[0055] The second output terminal of the gate driving circuit is connected to the load through the power tube.

[0056] In another optional embodiment, it also includes a rectifier circuit and an output control circuit;

[0057] The output end of the first isolation signal channel circuit is connected to the input end of the rectifier circuit, and the first output end of the rectifier circuit is connected to the first input end of the output circuit;

[0058] The second output terminal of the rectifier circuit is connected to the second input terminal of the output circuit.

[0059] In another optional embodiment, the millimeter wave isolator includes a transmitting end and a receiving end;

[0060] The transmitting end and the receiving end perform wireless communication via millimeter waves;

[0061] like Figure 2 As shown, the transmitting end and the receiving end both include a voltage-controlled oscillator (VCO), a power amplifier or a buffer amplifier (PA or Buffer), and an antenna connected in sequence. In this embodiment, there are two power amplifiers or buffer amplifiers, wherein the VCO generates an RF carrier signal, which is input to the power amplifier or the buffer amplifier (PA or Buffer), and the baseband signal is input to the power amplifier or the buffer amplifier (PA or Buffer) to modulate the carrier signal to generate a mixing signal, which is finally transmitted to the antenna for wireless transmission.

[0062] In another optional implementation, the gate drive circuit may be in a driving mode of driving upper and lower double tubes in a half-bridge mode, a driving mode of driving a single tube, or a driving mode of driving an H-bridge.

[0063] Among them, when the gate drive circuit is in the driving mode of the upper and lower double tube half bridge, as Figure 3 As shown, the gate drive circuit includes a first receiving circuit (i.e. Figure 3 The receiving circuit 1 in the embodiment of the present invention), the first buffer amplifier, the bootstrap circuit and the second buffer amplifier, and the second receiving circuit (i.e. Figure 3 The receiving circuit 2) and the third buffer amplifier;

[0064] The power tubes include an upper power tube Q1 and a lower power tube Q2;

[0065] The first output end of the output circuit is connected to the input end of the first receiving circuit and the input end of the second receiving circuit respectively;

[0066] The output end of the second buffer amplifier is connected to the gate of the upper power tube;

[0067] The output end of the third buffer amplifier is connected to the gate of the lower power tube;

[0068] The source of the upper power tube and the source of the lower power tube are connected to a load respectively;

[0069] Adaptively, the first data source (i.e. Figure 3 Data source 1 in the table) and the second data source (i.e. Figure 3 The data source 2 in the figure) and the corresponding first sending circuit (i.e. Figure 3 The transmission circuit 1 in the figure) and the second transmission circuit (i.e. Figure 3 The transmitting circuit 2 in the figure), the second output end of the output circuit is connected to one end of the first transmitting circuit and one end of the second transmitting circuit through a millimeter wave isolator, and the other end of the first transmitting circuit and the other end of the second transmitting circuit are connected to the first data source and the second data source respectively.

[0070] When the gate drive circuit is in a single-tube driving mode, Figure 4 As shown, the gate driving circuit includes a receiving circuit, a fourth buffer amplifier and a fifth buffer amplifier connected in sequence;

[0071] The output end of the fifth buffer amplifier is connected to the gate of the power tube;

[0072] The source of the power tube is connected to a load;

[0073] Adaptively, it also includes a data source and a transmitting circuit, the second output end of the output circuit is connected to one end of the transmitting circuit through a millimeter wave isolator, and the other end of the transmitting circuit is connected to the data source.

[0074] In summary, the utility model provides a gate driver power supply, in which millimeter wave isolators are used to isolate the input drive circuit and the output circuit, the input drive circuit and the sensing circuit, and the gate drive circuit and the data source. Compared with the existing optical isolation and magnetic isolation, the millimeter wave isolation method can achieve higher signal transmission speed and higher isolation voltage. It can achieve higher isolation voltage while improving the signal transmission speed, and well solve the problems of slow speed and low isolation voltage of existing optical isolation and magnetic isolation. Gate drive can be achieved in a variety of forms, with high flexibility.

[0075] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A gate driver power supply, comprising an input drive circuit, an output circuit and a gate drive circuit, wherein a first output terminal of the output circuit is connected to an input terminal of the gate drive circuit, characterized in that: The input drive circuit is connected to the first input terminal of the output circuit via a first isolation signal channel circuit; The first isolation signal channel circuit is a millimeter wave isolator.

2. A gate driver power supply according to claim 1, characterized in that: It also includes a feedback circuit, wherein the second output terminal of the output circuit is connected to one terminal of the feedback circuit, and the other terminal of the feedback circuit is connected to the input drive circuit via a second isolation signal channel circuit; The second isolation signal channel circuit is a millimeter wave isolator.

3. A gate driver power supply according to claim 1, characterized in that: It also includes a data source, and the first output terminal of the gate driving circuit is connected to the data source via a third isolation signal channel circuit; The third isolation signal channel circuit is a millimeter wave isolator.

4. A gate driver power supply according to claim 3, characterized in that: Also includes power tubes; The second output terminal of the gate driving circuit is connected to the load through the power tube.

5. A gate driver power supply according to any one of claims 1 to 4, characterized in that: It also includes a rectifier circuit and an output control circuit; The output end of the first isolation signal channel circuit is connected to the input end of the rectifier circuit, and the first output end of the rectifier circuit is connected to the first input end of the output circuit; The second output terminal of the rectifier circuit is connected to the second input terminal of the output circuit.

6. A gate driver power supply according to claim 2, characterized in that: Also includes a controller; The feedback circuit includes a sensing circuit; One end of the sensing circuit is connected to the second output end of the output circuit, and the other end of the sensing circuit is connected to one end of the second isolation signal channel circuit; The other end of the second isolation signal channel circuit is connected to the input end of the controller; The output end of the controller is connected to the input end of the input driving circuit.

7. A gate driver power supply according to any one of claims 1 to 4, characterized in that: The millimeter wave isolator includes a transmitting end and a receiving end; The transmitting end and the receiving end perform wireless communication via millimeter waves; The transmitting end and the receiving end both include a voltage-controlled oscillator, a power amplifier or a buffer amplifier and an antenna which are connected in sequence.

8. A gate driver power supply according to claim 4, characterized in that: The gate drive circuit is in a driving mode of driving upper and lower double tubes in a half-bridge mode, a driving mode of driving a single tube or a driving mode of driving an H-bridge.

9. A gate driver power supply according to claim 8, characterized in that: When the gate drive circuit is in a driving mode of an upper and lower double-tube half-bridge, the gate drive circuit includes a first receiving circuit, a first buffer amplifier, a bootstrap circuit, and a second buffer amplifier connected in sequence, and a second receiving circuit and a third buffer amplifier connected in sequence; The power tube comprises an upper power tube and a lower power tube; The first output end of the output circuit is connected to the input end of the first receiving circuit and the input end of the second receiving circuit respectively; The output end of the second buffer amplifier is connected to the gate of the upper power tube; The output end of the third buffer amplifier is connected to the gate of the lower power tube; The source of the upper power tube and the source of the lower power tube are connected to loads respectively.

10. A gate driver power supply according to claim 8, characterized in that: When the gate driving circuit is in a single-tube driving mode, the gate driving circuit comprises a receiving circuit, a fourth buffer amplifier and a fifth buffer amplifier connected in sequence; The output end of the fifth buffer amplifier is connected to the gate of the power tube; The source of the power tube is connected to a load.

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