Power cycle batch comparison verification circuit for MOSFET (Metal Oxide Semiconductor Field Effect Transistor) device

Abstract

The utility model discloses a power cycle batch comparison verification circuit for MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) devices, which relates to the technical field of power electronics and comprises a central control circuit, on-off control circuits, a current detection circuit and a display module, the central control circuit is electrically connected with the corresponding on-off control circuit through the current detection circuit, the central control circuit is electrically connected with the display module, and in the power cycle batch comparison verification circuit for the MOSFET device, the central control circuit controls the on-off of each on-off control circuit; the current detection circuit detects the current in the on-off control circuit and transmits the detected current to the central control circuit, the CPU in the central control circuit calculates the working power of the MOSFET according to the collected current and the conduction working voltage of the MOSFET, and related data is displayed through the display module. Therefore, the power cycle batch comparison detection of a plurality of MOSFET devices is realized.

Description

Technical Field

[0001] This utility model relates to the field of power electronics technology, specifically to a power cycle batch comparison verification circuit for MOSFET devices. Background Technology

[0002] MOSFET is an abbreviation for Metal-Oxide Semiconductor Field Effect Transistor. It is a device made of three materials: metal, oxide (SiO2 or SiN), and semiconductor. MOSFETs are voltage-controlled power semiconductor devices with significant advantages such as fast switching speed, good high-frequency characteristics, good thermal stability, low noise, simple drive circuitry, low drive power, wide safe operating area, and no secondary breakdown issues.

[0003] In existing MOSFET production processes, power testing of MOSFET devices is required. However, due to the lack of circuitry for batch testing, random sampling of MOSFET devices is necessary, which reduces the efficiency of MOSFET testing.

[0004] In summary, a power cycling batch comparison verification circuit for MOSFET devices was designed. Utility Model Content

[0005] To overcome the above-mentioned shortcomings, this invention provides a power cycling batch comparison verification circuit for MOSFET devices.

[0006] This utility model achieves the above objectives through the following technical solutions:

[0007] A power cycle batch comparison verification circuit for MOSFET devices includes a central control circuit, an on / off control circuit, a current detection circuit, and a display module. The central control circuit controls the on / off state of the MOSFETs in each on / off control circuit. The central control circuit is electrically connected to the corresponding on / off control circuit through the current detection circuit, and the central control circuit is electrically connected to the display module.

[0008] Preferably, the number of on / off control circuits is n, where n is greater than or equal to 1, which can realize the synchronous detection of multiple MOSFET devices.

[0009] Preferably, the on / off control circuit includes a MOSFET, a first resistor, and a second resistor. The gate of the MOSFET is electrically connected to the signal output terminal of the central control circuit through the second resistor. The source of the MOSFET is connected to an external 5V DC power supply through the first resistor, and the drain of the MOSFET is grounded.

[0010] Preferably, the on / off control circuit further includes a third resistor and a first capacitor. The drain of the MOSFET is grounded through a parallel circuit composed of the third resistor and the first capacitor, which can filter out spike interference signals during MOSFET on / off switching and improve the reliability of current detection.

[0011] Preferably, the current detection circuit includes a current transformer, a fourth resistor, a fifth resistor, a sixth resistor, and an operational amplifier. The non-inverting input of the operational amplifier is connected to an external reference voltage. The inverting input of the operational amplifier is electrically connected to the current transformer through the fourth resistor. The current transformer is electrically connected to the corresponding on / off control circuit. The inverting input of the operational amplifier is electrically connected to the output of the operational amplifier through the fifth resistor. The output of the operational amplifier is electrically connected to the central control circuit through the sixth resistor. The operational amplifier, along with the fourth and fifth resistors, forms a signal amplification circuit to amplify the detection signal from the current transformer and transmit it to the central control circuit.

[0012] Preferably, the current detection circuit further includes a seventh resistor and an eighth resistor. The non-inverting input terminal of the operational amplifier is electrically connected to the seventh resistor and the eighth resistor, respectively. One end of the series circuit composed of the seventh resistor and the eighth resistor is connected to a 5V DC power supply, and the other end of the series circuit composed of the seventh resistor and the eighth resistor is grounded.

[0013] Preferably, the display module includes a display driving circuit and a display screen. The central control circuit is electrically connected to the display screen through the display driving circuit. The central control module can display the on / off status of the corresponding MOSFET, as well as current and voltage data, on the display screen through the display driving circuit.

[0014] Preferably, an alarm module is also included, with the central control circuit electrically connected to the alarm module, which includes a voice prompt circuit.

[0015] Preferably, a communication circuit is also included, with the central control circuit electrically connected to the communication circuit, enabling communication between the external terminal and the central control circuit.

[0016] The beneficial effects of this utility model are as follows: In the power cycle batch comparison verification circuit for MOSFET devices, the central control circuit controls the on / off control circuits, and then the current detection circuit detects the current in the on / off control circuits and transmits it to the central control circuit. The CPU in the central control circuit calculates the operating power of the MOSFET based on the collected current and the MOSFET's on-state voltage, and then displays the relevant data through the display module, thereby realizing the power cycle batch comparison detection of multiple MOSFET devices. Attached Figure Description

[0017] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0018] Figure 1 This is a schematic diagram of the present invention;

[0019] Figure 2 This is a circuit diagram of the on / off control circuit of this utility model;

[0020] Figure 3 This is a circuit diagram of the current detection circuit of this utility model. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] like Figures 1-3 As shown, a power cycle batch comparison verification circuit for MOSFET devices includes a central control circuit, an on / off control circuit, a current detection circuit, and a display module. The central control circuit controls the on / off state of MOSFET Q1 in each on / off control circuit. The central control circuit is electrically connected to the corresponding on / off control circuit through the current detection circuit, and the central control circuit is electrically connected to the display module.

[0023] The working principle of this circuit for cyclic batch comparison and verification of MOSFET device power is as follows: First, the central control circuit controls the on / off control circuits. Then, the current detection circuit detects the current in the on / off control circuits and transmits it to the central control circuit. The CPU in the central control circuit calculates the operating power of MOSFET Q1 based on the collected current and the on-state voltage of MOSFET Q1. The relevant data is then displayed through the display module, thereby realizing the cyclic batch comparison and verification of the power of multiple MOSFET Q1 devices.

[0024] Specifically, the number of on / off control circuits is n, where n is greater than or equal to 1, which can realize the synchronous detection of multiple MOSFETQ1 devices.

[0025] Specifically, the on / off control circuit includes a MOSFET Q1, a first resistor R1, and a second resistor R2. The gate of the MOSFET Q1 is electrically connected to the signal output terminal of the central control circuit through the second resistor R2. The source of the MOSFET Q1 is connected to an external 5V DC power supply through the first resistor R1, and the drain of the MOSFET Q1 is grounded.

[0026] Specifically, the on / off control circuit also includes a third resistor R3 and a first capacitor C1. The drain of MOSFET Q1 is grounded through a parallel circuit composed of the third resistor R3 and the first capacitor C1, which can filter out spike interference signals during the on / off switching of MOSFET Q1 and improve the reliability of current detection.

[0027] Specifically, the current detection circuit includes a current transformer P1, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and an operational amplifier U1. The non-inverting input of the operational amplifier U1 is connected to an external reference voltage, and the inverting input of the operational amplifier U1 is electrically connected to the current transformer P1 through the fourth resistor R4. The current transformer P1 is electrically connected to the corresponding on / off control circuit. The inverting input of the operational amplifier U1 is electrically connected to the output of the operational amplifier U1 through the fifth resistor R5, and the output of the operational amplifier U1 is electrically connected to the central control circuit through the sixth resistor R6. The operational amplifier U1, along with the fourth resistor R4 and the fifth resistor R5, forms a signal amplification circuit to amplify the detection signal from the current transformer P1 and transmit it to the central control circuit.

[0028] Specifically, the current detection circuit also includes a seventh resistor R7 and an eighth resistor R8. The non-inverting input terminal of the operational amplifier U1 is electrically connected to the seventh resistor R7 and the eighth resistor R8 respectively. One end of the series circuit composed of the seventh resistor R7 and the eighth resistor R8 is connected to a 5V DC power supply, and the other end of the series circuit composed of the seventh resistor R7 and the eighth resistor R8 is grounded.

[0029] Specifically, the display module includes a display driving circuit and a display screen. The central control circuit is electrically connected to the display screen through the display driving circuit. The central control module can display the on / off status of the corresponding MOSFET Q1, as well as current and voltage data, on the display screen through the display driving circuit.

[0030] Specifically, it also includes an alarm module, with the central control circuit electrically connected to the alarm module, which includes a voice prompt circuit.

[0031] Specifically, it also includes a communication circuit. The central control circuit is electrically connected to the communication circuit, which enables communication between external terminals and the central control circuit.

[0032] Based on the above description and inspired by this utility model, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A power cycling batch comparison verification circuit for MOSFET devices, characterized in that: It includes a central control circuit, an on / off control circuit, a current detection circuit, and a display module. The central control circuit controls the on / off state of the MOSFETs in each on / off control circuit. The central control circuit is electrically connected to the corresponding on / off control circuit through the current detection circuit, and the central control circuit is electrically connected to the display module.

2. The power cycling batch comparison verification circuit for MOSFET devices according to claim 1, characterized in that: The number of on / off control circuits is n, where n is greater than or equal to 1.

3. The power cycling batch comparison verification circuit for MOSFET devices according to claim 1, characterized in that: The on / off control circuit includes a MOSFET, a first resistor, and a second resistor. The gate of the MOSFET is electrically connected to the signal output terminal of the central control circuit through the second resistor. The source of the MOSFET is connected to an external 5V DC power supply through the first resistor, and the drain of the MOSFET is grounded.

4. The power cycling batch comparison verification circuit for MOSFET devices according to claim 3, characterized in that: The on / off control circuit also includes a third resistor and a first capacitor, and the drain of the MOSFET is grounded through a parallel circuit composed of the third resistor and the first capacitor.

5. The power cycling batch comparison verification circuit for MOSFET devices according to claim 1, characterized in that: The current detection circuit includes a current transformer, a fourth resistor, a fifth resistor, a sixth resistor, and an operational amplifier. The non-inverting input of the operational amplifier is connected to an external reference voltage. The inverting input of the operational amplifier is electrically connected to the current transformer through the fourth resistor. The current transformer is electrically connected to the corresponding on / off control circuit. The inverting input of the operational amplifier is electrically connected to the output of the operational amplifier through the fifth resistor. The output of the operational amplifier is electrically connected to the central control circuit through the sixth resistor.

6. The power cycling batch comparison verification circuit for MOSFET devices according to claim 5, characterized in that: The current detection circuit also includes a seventh resistor and an eighth resistor. The non-inverting input terminal of the operational amplifier is electrically connected to the seventh resistor and the eighth resistor, respectively. One end of the series circuit composed of the seventh resistor and the eighth resistor is connected to a 5V DC power supply, and the other end of the series circuit composed of the seventh resistor and the eighth resistor is grounded.

7. The power cycling batch comparison verification circuit for MOSFET devices according to claim 1, characterized in that: The display module includes a display driving circuit and a display screen, and the central control circuit is electrically connected to the display screen through the display driving circuit.

8. The power cycling batch comparison verification circuit for MOSFET devices according to claim 1, characterized in that: It also includes an alarm module, with the central control circuit electrically connected to the alarm module, which includes a voice prompt circuit.

9. The power cycling batch comparison verification circuit for MOSFET devices according to claim 1, characterized in that: It also includes communication circuits, with the central control circuit electrically connected to the communication circuits.

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