A drive control circuit, system and integrated circuit for a power switch device

Abstract

The present invention discloses a driving control circuit of a power switch device, including a power supply, a control circuit, a driving module, an operational amplifier circuit, a power switch device, a sampling resistor and a load. The positive power input terminal of the control circuit and the driving module is connected to the positive power supply, and the negative power input terminal is connected to the power bus; the analog signal input terminal of the operational amplifier circuit is connected to the two ends of the sampling resistor, and the analog signal output terminal of the operational amplifier circuit is connected to the analog signal input terminal of the control circuit; the driving module is suitable for driving the power switch device to turn on or off according to the driving control signal; the drain of the power switch device is connected to the power bus through the sampling resistor, the gate is connected to the signal output terminal of the driving module, and the source is connected to the power ground wire through the load. The circuit uses the drain of the power switch device as a reference point. In the case of multi-channel driving, each driving module can share a power supply, and the isolation operational amplifier is omitted, thereby reducing the circuit volume.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated circuits, and in particular to a drive control circuit, system and integrated circuit of a power switch device. Background Art

[0002] Solid-state power controllers are intelligent switching devices that integrate the switching function of relays and the electrical protection function of circuit breakers. At present, solid-state power controllers are widely used in the field of aerospace power distribution, which has high requirements for miniaturization and integration. A single solid-state power controller generally integrates multiple independently drivable power switch branches to achieve power distribution for multiple electrical equipment. The traditional method is generally a combination of multiple single channels, each of which requires an independent driving power supply, which is not conducive to reducing the size of the device, increasing power density and reducing costs.

[0003] Figure 1 FIG. 1 shows a block diagram of a conventional multi-channel power switch device drive control system. Figure 1 As shown, there is a separate power supply in the circuit to power the control circuit, and n independent power supplies to power each driving circuit, so that each power switch device can be driven independently. This driving method causes the sampling signal at both ends of the sampling resistor to be grounded differently from the control circuit power supply, so n isolation amplifiers are required to sample each current. In this driving method, the driving level uses the source of each power switch device as a reference point. In the case of multiple field effect transistors, the on-off status of each channel is inconsistent, so the source voltage is also inconsistent. An independent floating power supply must be added for each channel. The sampling circuit requires an isolation amplifier, which has high hardware costs and is not conducive to reducing the circuit volume.

[0004] Therefore, it is necessary to provide a drive control circuit and a drive control system for a power switching device, which can independently drive multiple power switching devices with only one power supply, thereby reducing the use of hardware and improving the integration of solid-state power controllers to solve the problems existing in the above-mentioned prior art. Summary of the invention

[0005] In view of the above problems, the present invention provides a drive control circuit, a drive control system and an integrated circuit of a power switch device that overcome the above problems or at least partially solve the above problems.

[0006] According to one aspect of the present invention, a driving control circuit of a power switch device is provided, the driving control circuit includes a power supply, a control circuit, a driving circuit and an operational amplifier circuit, wherein the driving circuit includes a driving module, a power switch device, a sampling resistor and a load. The positive power input terminal of the control circuit is connected to the positive power supply, the negative power input terminal of the control circuit is connected to the power bus, the positive power input terminal of the driving module is connected to the positive power supply, the negative power input terminal of the driving module is connected to the power bus, the analog signal input terminal of the operational amplifier circuit is connected to the two ends of the sampling resistor, the analog signal output terminal of the operational amplifier circuit is connected to the analog signal input terminal of the control circuit, the driving module is suitable for driving the power switch device to turn on or off according to the driving control signal, the drain of the power switch device is connected to the power bus via the sampling resistor, the gate of the power switch device is connected to the signal output terminal of the driving module, and the source of the power switch device is connected to the power ground via the load.

[0007] The drive control circuit adopts the common field effect tube drain drive mode. The drain of the power field effect tube is connected to the power bus through the sampling resistor. The control circuit uses the power bus as the reference ground. The control circuit power supply and the power field effect tube drive power supply are the same power supply. Therefore, only one power supply is needed to realize the control circuit power supply and the power field effect tube drive. The sampling signal at both ends of the sampling resistor shares the same ground with the control circuit power supply. Therefore, the sampling of each current can be realized without the isolation amplifier. Therefore, this solution can minimize the number of components, thereby reducing the circuit volume and reducing costs.

[0008] Optionally, the power supply includes a driving power supply and a power power supply. The power power supply is a power supply between a power bus and a power ground, suitable for powering a load. The driving power supply is a power supply between a positive pole of the power supply and a power bus, suitable for powering a driving module, a control circuit and an operational amplifier circuit.

[0009] Optionally, the power switch device includes a power field effect transistor and a parasitic diode, and the parasitic diode is connected in parallel between the drain and the source of the power field effect transistor.

[0010] Optionally, the driving module includes a first controlled switch and a second controlled switch. When the driving control signal is at a high level, the first controlled switch is turned on and the second controlled switch is turned off; when the driving control signal is at a low level, the second controlled switch is turned on and the first controlled switch is turned off.

[0011] Optionally, the driving module also includes a first resistor and a second resistor, the first resistor is connected in series with the first controlled switch, the second resistor is connected in parallel with the second controlled switch, the first resistor and the second resistor are connected in series, when the first controlled switch is turned on and the second controlled switch is turned off, the power field effect tube is turned on; when the first controlled switch is turned off and the second controlled switch is turned on, the power field effect tube is turned off.

[0012] Optionally, the second resistor is connected in parallel between the source and gate of the power field effect tube. When current flows in the second resistor, the voltage across the second resistor is suitable for charging the gate-source capacitor in the power field effect tube. When the voltage across the gate-source capacitor reaches the turn-on voltage, the power field effect tube is turned on.

[0013] Optionally, the driving circuit also includes a pull-down resistor, one end of the pull-down resistor is connected to the source of the power field effect tube, and the other end is connected to the power ground. The pull-down resistor is connected in parallel with the load. When the power field effect tube is turned off, a path from the source to the drain is formed through the pull-down resistor and the power supply or the load and the power supply; when the power field effect tube is turned on, a path from the source to the drain is formed through the power field effect tube and the sampling resistor.

[0014] According to another aspect of the present invention, a drive control system for a power switching device is provided, comprising at least two drive circuits as described above connected in parallel between a power bus and a power ground, and a controller, a data selector and at least two operational amplifiers connected in parallel between a positive pole of a power supply and the power bus, wherein a control signal input terminal of the data selector is connected to a control signal output terminal of the controller, an analog signal input terminal of the data selector is respectively connected to an output terminal of each operational amplifier, and a positive input terminal and a negative input terminal of the operational amplifier are respectively connected in parallel to two ends of a sampling resistor in a corresponding drive circuit.

[0015] According to one aspect of the present invention, there is provided an integrated circuit, comprising the above-mentioned drive control system of the power switching device, wherein the integrated circuit is any one of a solid-state power controller integrated circuit and a solid-state relay integrated circuit.

[0016] According to the solution of the present invention, the drive control circuit uses the drain terminal of the power switch device as the reference ground, and provides a current path from the positive electrode of the drive power supply to the gate, then to the source, and finally back to the drain (negative electrode of the drive power supply). In the case of multi-way driving, only one drive power supply is required to achieve independent driving of multiple power switch devices. Compared with the traditional method, the drive control system of the power switch device provided by this solution greatly reduces the number of circuit components and the circuit volume is correspondingly reduced, which can achieve higher power density and improve the integration of solid-state power controllers.

[0017] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0019] Figure 1 The structure block diagram of the driving control system of the conventional multi-way power switch device is shown;

[0020] Figure 2 A circuit block diagram of a drive control system for a power switch device according to an embodiment of the present invention is shown;

[0021] Figure 3 A circuit block diagram of a drive control circuit of a power switch device according to an embodiment of the present invention is shown;

[0022] Figure 4 A circuit block diagram of a driving circuit of a power switch device according to an embodiment of the present invention is shown;

[0023] Figure 5 An equivalent circuit diagram of a driving circuit of a power switch device according to an embodiment of the present invention is shown;

[0024] Figure 6 A test circuit diagram of a field effect transistor driving circuit according to an embodiment of the present invention is shown;

[0025] Figure 7 The waveform diagram of DRI1 and OUT1 during the field effect tube turn-on process is shown;

[0026] Figure 8 The waveforms of DRI1 and OUT1 during the field effect tube shutdown process are shown;

[0027] Fig. 9 The circuit schematic of single channel 1 in the 8-channel power distribution combination is shown.

[0028] Fig.10 The test waveform diagram of the 8-channel power distribution combination opening channel 1 without load is shown;

[0029] Fig.11 The test waveform diagram of the 8-channel power distribution combination no-load shutdown channel 1 is shown. DETAILED DESCRIPTION

[0030] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0031] A single solid-state power controller generally integrates multiple independently drivable power switch branches to achieve power distribution for multiple electrical devices. The traditional method is generally a combination of multiple single branches, each of which requires an independent driving power supply, which is not conducive to reducing the volume, increasing the power density and reducing the cost. In view of the above situation, this scheme proposes a drive control system for power switch devices using a common field effect tube drain drive method, which only requires one driving power supply to independently drive multiple power field effect tubes.

[0032] Figure 2 FIG. 2 shows a circuit block diagram of a drive control system for a power switch device according to an embodiment of the present invention. Figure 2 As shown, the drive control system of the power switch device includes a plurality of drive circuits connected in parallel between the power bus and the power ground, and a controller MCU, a data selector and a plurality of operational amplifiers (op amps) connected in parallel between the positive pole of the power supply and the power bus. The control signal input end of the data selector is connected to the control signal output end of the controller, the analog signal input end of the data selector is respectively connected to the output end of each op amp, and the positive input end and the negative input end of the op amp are respectively connected in parallel to the two ends of the sampling resistor in the corresponding drive circuit. The drain of all power switch devices is connected to the power bus through the sampling resistor, the controller (MCU) uses the power bus as the reference ground GND1, the controller power supply and the power field effect tube drive power supply are the same power supply, and only one power supply is needed to realize the controller power supply and the independent drive of each power field effect tube. The sampling signal at both ends of the sampling resistor is grounded with the controller power supply, that is, the power bus is the reference ground of the power supply, so the sampling of each current can be realized without isolating the op amp. The voltage provided by the power supply 1 to the controller and the drive circuit may be different, but they are all grounded, so they can be uniformly called power supply 1. By adopting the common field effect transistor drain driving method and taking the field effect transistor drain as the reference point, each path can share the driving power supply and the isolation operational amplifier can be omitted.

[0033] The key to common drain driving is to find a current path from the positive pole of the driving power supply to the gate, then to the source and finally back to the drain (the negative pole of the driving power supply), that is, the driving path. Figure 3 FIG. 2 shows a circuit block diagram of a drive control circuit of a power switch device according to an embodiment of the present invention. Figure 3As shown, the drive control circuit includes a power supply, a control circuit, a drive circuit and an operational amplifier circuit, wherein the drive circuit includes a drive module, a power switch device, a sampling resistor and a load. The positive power input terminal of the control circuit is connected to the positive pole of the power supply, the negative power input terminal of the control circuit is connected to the power bus, the positive power input terminal of the drive module is connected to the positive pole of the power supply, and the negative power output terminal of the drive module is connected to the power bus. The drive module is suitable for driving the power switch device to turn on or off according to the drive control signal, the drain of the power switch device is connected to the power bus via the sampling resistor, the gate of the power switch device is connected to the signal output terminal of the drive module, and the source of the power switch device is connected to the power ground via the load. Among them, the power supply may include a drive power supply and a power power supply, the power power supply is a power supply between the power bus and the power ground, suitable for powering the power switch device and the load, and the drive power supply is a power supply between the positive pole of the power supply and the power bus, suitable for powering the drive module, the control circuit and the operational amplifier circuit.

[0034] In order to further explain the driving principle of the common drain drive of the switching device, Figure 4 FIG. 2 shows a circuit block diagram of a driving circuit of a power switch device according to an embodiment of the present invention. Figure 4 As shown, VCC1_1 is the driving power supply of V11, and its value can be determined according to the requirements of the field effect tube for the driving voltage. VCC1_2 is a high level, DRI1 is a driving control signal, and the reference grounds of VCC1_1, VCC1_2 and DRI1 are all QGND, i.e., the power bus. The power switch device V11 may include a power field effect tube and a parasitic diode connected in parallel between the drain and source of the power field effect tube. The driving module includes a first controlled switch and a second controlled switch. When the driving control signal DRI1 is a high level, the first controlled switch is turned on, the second controlled switch is turned off, and the power field effect tube V11 is turned on; when the driving control signal DRI1 is a low level, the second controlled switch is turned on, the first controlled switch is turned off, and the power field effect tube V11 is turned off. Among them, the first controlled switch includes a first photocoupler N11 and a first driving resistor R11. The first controlled switch and the second controlled switch can be photocouplers or other controlled switch devices.

[0035] like Figure 4 As shown, the driving module also includes a first resistor R12 and a second resistor R15. The first resistor R12 is connected in series with the first controlled switch, the second resistor R15 is connected in parallel with the second controlled switch, and the first resistor R12 and the second resistor R15 are connected in series. The second resistor R15 is connected in parallel between the source and the gate of the power field effect tube. When the current flows in the second resistor R15, the voltage across the second resistor R15 is suitable for charging the capacitor between the gate and the source of the power field effect tube. When the voltage across the gate-source capacitor reaches the turn-on voltage, the power field effect tube V11 is turned on. Figure 4As shown, the driving circuit also includes a pull-down resistor R16, which is used to pull OUT1 down to a certain low level when V11 is turned off. One end of the pull-down resistor R16 is connected to the source of the power field effect tube, and the other end is connected to the power ground (PGND). The pull-down resistor R16 is connected in parallel with the load R1L. When the power field effect tube V11 is turned off, a path from the source to the drain is formed through the pull-down resistor R16 and the power supply or the load R1L and the power supply; when the power field effect tube V11 is turned on, a path from the source to the drain is formed through the power field effect tube V11 and the sampling resistor R1S.

[0036] In order to make OUT1 an exact low level when V11 is turned off without load, a pull-down resistor R16 is added between OUT1 and PGND. The parasitic diode is in a reverse biased state and cannot be turned on. However, a path from the source to the drain can be formed with the help of R16 and the power supply. After the path is formed, the driving power supply can make voltage on R15 through the driving path of "R12-R15-R16 (or R1L)-power supply-QGND", charge the gate-source capacitor of V11, and turn on V11. After V11 is turned on, the field effect tube V11 and the sampling resistor R1S can form a path from the source to the drain, and the driving path becomes mainly the path of "R12-R15-field effect tube-R1S-QGND". This driving path continues to exist, the current on R15 continues to exist, the voltage on R15 continues to exist, and V11 remains turned on.

[0037] Figure 5 FIG. 4 shows an equivalent circuit diagram of a driving circuit of a power switch device according to an embodiment of the present invention. Figure 5 As shown, R12=1K, R15=20K, R16=10K, R1S=1mΩ. R1L is the load, the first controlled switch and the second controlled switch can be equivalent to variable resistors RN11 and RN12, the dotted box is the equivalent model of the power field effect tube, CGS is the parasitic capacitance between the gate and the source, RDS is the equivalent resistance between the drain and the source, VP is the parasitic diode of the field tube, and CGS and RDS are coupled: when the voltage UGS across CGS rises to close to the VGS(th) turn-on voltage, RDS decreases rapidly. Take VGS(th) of V11 as an example for analysis. Define "R12-R15-R16-power supply-QGND" as "drive path 1", "R12-R15-RDS-R1S-QGND" as "drive path 2", and "R12-R15-VP-R1S-QGND" as "drive path 3".

[0038] When the drive circuit is connected to the rated load, that is, R1L = 0.35Ω, according to the superposition theorem, when only 12V drive power is applied to the circuit, RDS + RS ≈ 3mΩ, which is much smaller than R16 / / R1L under normal circumstances. When only 28V power supply acts on the circuit, since RDS+RS≈3mΩ is much smaller than the sum of R12 and R15, therefore:

[0039]

[0040] The total current flowing through the field effect tube: I2 = I 2P +I 2Q =79.32A

[0041] At this time, VP is also reverse biased and not conducting, and the field tube is mainly driven to conduct through the driving path 2. Finally, the field tube gate-source voltage V GS =I 1Q ×R 15 =11.4V, the field tube remains in the on state.

[0042] Turn-off process: the first controlled switch N11 is turned off and N12 is turned on, RN11 increases rapidly to the megohm level and RN12 decreases rapidly to near zero, the gate G and the source S are discharged through RN12, and the field effect tube is turned off.

[0043] Figure 6 FIG. 2 shows a test circuit diagram of a field effect transistor driving circuit according to an embodiment of the present invention. Figure 6 As shown, the driving power supply is +12V, the power power supply is +28V, and the waveform of DRI1 (to QGND) and the waveform of OUT1 (to PGND) are measured at the moment when the power field effect tube is turned on and off. Figure 7 The waveform diagram of DRI1 and OUT1 during the field effect tube turn-on process is shown. Figure 8 The waveforms of DRI1 and OUT1 during the FET shutdown process are shown. Figure 7 and Figure 8 It can be seen that the FET can be driven on and off normally. Under this test condition, the FET's turn-on time is about 60us and the turn-off time is about 26us.

[0044] Next, an 8-channel power distribution combination (rated current 80A) is used as an example. The channels in the power distribution combination are driven by a common drain, and the power and current limiting branches within a single channel are also driven by a common drain. Therefore, studying the two branches within a single channel and studying the channels of the power distribution combination are equivalent to studying the common drain driving method. Fig. 9 Figure 1 shows the circuit schematic of a single channel 1 in an 8-channel power distribution combination. Fig. 9As shown, the channel includes a power branch formed by V11_1 and V11_2 in parallel and a current limiting branch formed by V1_1. V11_1 and V11_2 are controlled by the drive control signal DRI1, and V1_1 is controlled by the drive signal DRI_1. V11_1 and V11_2 are regarded as a whole V11. The drains of V11 and V1_1 are connected to the power bus through sampling resistors, which belongs to the typical common field tube drain drive mode. Through the power distribution combination external CAN bus and internal DSP control channel opening and disconnection, the voltage waveforms of the two branch control signals (power branch VDRI1, current limiting branch VDRI_1) and the gate to source (power branch VGS1, current limiting branch VGS_1) under different working conditions are tested respectively. QGND is the reference ground of the power supply +12V, +3.3V and the drive control signals VDRI1 and VDRI_1, and is also the power bus. The voltage difference between it and the power ground is 28V. When the power branch is turned on, the control signal DRI1 is set to a high level, N11 is turned on and N12 is turned off, the voltage is divided on R15, the gate-source capacitor of the field tube is charged, and the field effect tube is turned on. When turned off, the control signal DRI1 is set to a low level, N12 is turned on and N11 is turned off, the output transistor of N12 and the resistor R13 form a discharge path between the gate and the source of V11, and the field tube is quickly disconnected, so that the instantaneous high power can be avoided from damaging the field effect tube during short-circuit protection. The connection and shutdown process of the current limiting branch is similar to that of the power branch.

[0045] There is a high-power transient suppression diode between the drain and source of the power field effect tube to suppress the peak voltage. At the same time, there is a fast recovery diode between OUT and the power ground. Its function is that when there is an inductive load, the disconnection channel can be used as a discharge channel to quickly discharge the energy on the load.

[0046] Fig.10 The test waveform of the 8-channel power distribution combination opening channel 1 at no load is shown. Before the channel is turned on, VDRI_1 and VDRI1 are low, and VGS1 and VGS_1 are 0. When the channel is turned on, VDRI_1 is first set to a high level (+3.3V), the first controlled switch N11 is turned on, and N12 is turned off. At this time, VGS_1 is about 11.4V, and the current limiting branch is turned on. 1ms after the current limiting branch is turned on, VDRI1 is set to high, VGS1 rises to 11.4V, and the power branch is turned on. Fig.11 The test waveform of the 8-channel power distribution combination no-load shutdown channel 1 is shown. Before channel 1 is shut down, VDRI1 and VDRI_1 are high (+3.3V), and VGS1 and VGS_1 are about 11.4V. When channel 1 is shut down, VDRI1 is set to a low level, the optocoupler N12 is turned on and N11 is turned off, the gate-source capacitance of V11 is discharged, VGS1 drops to 0, and the power branch is turned off. 1ms after the power branch is disconnected, VDRI_1 is set to a low level, VGS_1 drops to 0, and the current limiting branch is disconnected.

[0047] The above tests show that the common field effect tube drain drive method only needs one drive power supply to achieve independent drive of multiple field effect tubes. Compared with the traditional method, the common field tube drain drive method greatly reduces the number of circuit components and the circuit volume, which can achieve higher power density and meet the development trend of miniaturization.

[0048] The driving control circuit of the power switch device provided by the present application uses the drain terminal of the power switch device as the reference ground, and provides a current path from the positive electrode of the driving power supply to the gate, then to the source, and finally back to the drain (negative electrode of the driving power supply). In the case of multi-channel driving, only one driving power supply is required to achieve independent driving of multiple power switch devices. Compared with the traditional method, the driving control system of the power switch device provided by this solution greatly reduces the number of circuit components and the circuit volume is correspondingly reduced, which can achieve higher power density and thus improve the integration of the solid-state power controller.

[0049] The embodiment of the present invention also provides an integrated circuit, including a drive control system of the above-mentioned power switch device. The integrated circuit can be a solid-state relay, a solid-state power controller and / or an integrated circuit or a single-chip circuit of a power switch device. The drive control circuit provided by the present invention saves components of multi-channel solid-state power controllers and solid-state relays to the greatest extent, thereby reducing the volume to the greatest extent. The technology can be applied to related fields as a solidified technology, thereby realizing the modularization of the technology, which is conducive to improving the research and development cycle and efficiency of new products.

[0050] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0051] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims below, any one of the claimed embodiments may be used in any combination.

[0052] As used herein, unless otherwise specified, the use of ordinal numbers "first," "second," "third," etc. to describe common objects merely indicates that different instances of similar objects are involved, and is not intended to imply that the objects so described must have a given order in time, space, order, or in any other manner.

[0053] Although the present invention has been described according to a limited number of embodiments, it will be apparent to those skilled in the art, with the benefit of the above description, that other embodiments may be envisioned within the scope of the invention thus described. In addition, it should be noted that the language used in this specification is selected primarily for readability and teaching purposes, rather than for explaining or defining the subject matter of the present invention. Therefore, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of the present invention is illustrative and not restrictive with respect to the scope of the present invention, and the scope of the present invention is defined by the appended claims.

Claims

1. A drive control circuit for a power switch device, the drive control circuit comprising a power supply, a control circuit, a drive circuit and an operational amplifier circuit, the drive circuit comprising a drive module, a power switch device, a sampling resistor and a load, characterized in that: The positive power input terminal of the control circuit is connected to the positive power supply, the negative power input terminal of the control circuit is connected to the power bus, the positive power input terminal of the drive module is connected to the positive power supply, the negative power input terminal of the drive module is connected to the power bus, the analog signal input terminal of the operational amplifier circuit is connected to the two ends of the sampling resistor, the analog signal output terminal of the operational amplifier circuit is connected to the analog signal input terminal of the control circuit, the drive module is suitable for driving the power switch device to turn on or off according to the drive control signal, the drain of the power switch device is connected to the power bus via the sampling resistor, the gate of the power switch device is connected to the signal output terminal of the drive module, and the source of the power switch device is connected to the power ground via the load; The power supply includes a driving power supply and a power supply, the power switch device includes a power field effect tube and a parasitic diode, the driving circuit also includes a pull-down resistor, one end of the pull-down resistor is connected to the source of the power field effect tube, and the other end of the pull-down resistor is connected to the power ground line, the pull-down resistor is connected in parallel with the load, when the power field effect tube is turned off, a path from the source to the drain is formed through the pull-down resistor and the power supply or the load and the power supply; when the power field effect tube is turned on, a path from the source to the drain is formed through the power field effect tube and the sampling resistor; the power supply is a power supply between the power bus and the power ground line, suitable for supplying power to the load, the driving power supply is a power supply between the positive electrode of the power supply and the power bus, suitable for supplying power to the driving module, the control circuit and the operational amplifier circuit; the parasitic diode is connected in parallel between the drain and the source of the power field effect tube; the driving module includes a first controlled switch and a second controlled switch, when the driving control signal is at a high level, the first controlled switch is turned on and the second controlled switch is turned off; when the driving control signal is at a low level, the second controlled switch is turned on and the first controlled switch is turned off; the driving module also includes a first resistor and a second resistor, the first resistor is connected in series with the first controlled switch, the second resistor is connected in parallel with the second controlled switch, the first resistor and the second resistor are connected in series, when the first controlled switch is turned on and the second controlled switch is turned off, the power field effect tube is turned on; when the first controlled switch is turned off and the second controlled switch is turned on, the power field effect tube is turned off; the second resistor is connected in parallel between the source and the gate of the power field effect tube, when current flows in the second resistor, the voltage across the second resistor is suitable for charging the gate-source capacitor in the power field effect tube, and when the voltage across the gate-source capacitor reaches the turn-on voltage, the power field effect tube is turned on.

2. A drive control system for a power switch device, characterized in that: The invention comprises at least two driving circuits in the driving control circuit as claimed in claim 1 connected in parallel between a power bus and a power ground line, and a controller, a data selector and at least two operational amplifier circuits connected in parallel between a positive pole of a power supply and a power bus, wherein the control signal input end of the data selector is connected to the control signal output end of the controller, the analog signal input end of the data selector is respectively connected to the output end of each operational amplifier circuit, and the positive input end and the negative input end of the operational amplifier circuit are respectively connected in parallel to the two ends of a sampling resistor in a corresponding driving circuit.

3. An integrated circuit, characterized in that: The integrated circuit includes the drive control system of the power switch device as claimed in claim 2, and the integrated circuit includes any one of a solid-state power controller integrated circuit and a solid-state relay integrated circuit.

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