Plug-in resistance adjustment module and power device driving circuit

Abstract

The utility model provides a kind of plug-in resistance adjustment module and power device drive circuit, it is related to power device test technical field, including multiple detachable parallel plug-in resistance unit, each unit is composed of the base of carrying resistance, top row and bottom row pin, resistance is connected between row, multiple units are stacked in parallel by plug-in mode, it is convenient to flexibly adjust equivalent gate resistance to match the drive demand of power device. Base side is equipped with antiskid convex strip and color ring identification, improve plug-in efficiency and parameter identification. The module is applied in gate drive path, realizes up and down along adjustment control by double branch drive, cooperate with the suppression and stable branch in circuit, improve the drive stability in plug-in process, it is applicable to the test and matching optimization of power device.

Description

Technical Field

[0001] This utility model relates to the field of power device testing technology, and in particular to a pluggable resistor adjustment module and a power device driving circuit. Background Technology

[0002] In the performance testing and parameter matching of power devices, the double-pulse test method is often used to dynamically evaluate the device's turn-on and turn-off behavior. This method drives the power device to turn on and off using two pulse control signals to simulate its operating state in a real circuit, thereby analyzing key characteristics such as switching speed, voltage overshoot, current spikes, and switching losses. To obtain a more ideal dynamic response, the rising and falling edge characteristics of the gate drive signal are usually adjusted during the test to match the gate parameters of the target device.

[0003] In existing test platforms, adjusting the gate drive signal primarily relies on replacing gate resistors with different values. Traditionally, this involves soldering multiple resistor components onto a circuit board to construct different resistor networks to evaluate the impact of various parameter combinations on device behavior. However, this method has significant limitations: firstly, frequent resistor replacements require repeated soldering, which can easily lead to pad damage, cold solder joints, or detachment, affecting test stability; secondly, the number of available pads on the circuit board is limited, resulting in poor flexibility in resistor combinations and hindering efficient multi-parameter tuning. Furthermore, the resistance values ​​of the positive and negative gate drive paths often need to be adjusted separately, further increasing soldering difficulty and the risk of misoperation. Utility Model Content

[0004] To overcome the shortcomings of the prior art, the technical problem to be solved by this utility model is to propose a pluggable resistor adjustment module and a power device drive circuit, and the following technical solution is adopted:

[0005] A pluggable resistor adjustment module includes multiple pluggable resistor units that are detachably connected in parallel with each other.

[0006] The aforementioned pluggable resistor unit includes a base on which a resistor is fixed. The base also includes two female connectors and two pin headers that are electrically connected to the two female connectors respectively. The resistor is electrically connected between the two female connectors.

[0007] Multiple pluggable resistor units are connected in parallel by connecting to the socket of another pluggable resistor unit via pin headers.

[0008] As a further improvement, the aforementioned nut is disposed at the top of the aforementioned base, and the aforementioned pin is disposed at the bottom of the aforementioned base.

[0009] As a further improvement, the sides of the aforementioned base are provided with several anti-slip protrusions.

[0010] As a further improvement, the aforementioned anti-slip protrusions are provided with marking portions, the aforementioned anti-slip protrusions of the plurality of aforementioned pluggable resistor units are staggered with each other in the vertical direction, and the aforementioned marking portions are marked with resistance parameter information.

[0011] As a further improvement, the above-mentioned markings are printed with color rings according to the IEC60062 standard to indicate the resistance value and tolerance range of the pluggable resistor unit.

[0012] Another aspect of this utility model proposes a power device driving circuit, including a gate driving module and a power device. The input terminal of the gate driving module is connected to a signal generator, which generates a driving signal for controlling the power device according to the control signal of the signal generator. A plug-in resistor adjustment module as proposed in any of the above is provided between the gate driving module and the power device, which is used to adjust the rising edge and falling edge characteristics of the gate driving signal to match the gate parameter characteristics of the target power device.

[0013] As a further improvement, the gate drive module mentioned above includes an isolated drive chip of model number 1ED I 3031ASXUMA1 and its peripheral circuitry.

[0014] As a further improvement, the test output pin of the aforementioned driver chip is connected to two output branches connected in parallel. Both of the aforementioned output branches include a series-connected Schottky rectifier and the aforementioned pluggable resistor adjustment module. The conduction directions of the Schottky rectifiers of the two aforementioned output branches are opposite, and they are turned on when the aforementioned drive signal is positive or negative, respectively.

[0015] As a further improvement, a TVS transient suppression diode is connected between the drain output terminal and the gate output terminal, and between the gate output terminal and the source output terminal of the power device, respectively, to absorb transient overvoltages.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] Firstly, this invention provides a pluggable resistor adjustment module composed of multiple pluggable resistor units. Each pluggable resistor unit is detachably plugged in via pin headers and sockets, and multiple resistors are connected in parallel through electrical connections between the pin headers and sockets. In practical applications, users can stack and plug in several pluggable resistor units sequentially according to the driving requirements of the power device under test, thus quickly constructing the gate resistor path with the target total resistance value. This structure eliminates the cumbersome soldering and desoldering processes of traditional debugging methods, allowing for quick replacement or combination of resistance values ​​without modifying pads or wiring. This facilitates convenient switching between different gate rise / fall speed characteristics and is suitable for applications such as dual-pulse testing and gate drive matching optimization. It has the advantages of flexible adjustment, rapid response, and low barrier to entry.

[0018] Secondly, this invention features several anti-slip protrusions on the side of the resistor unit's base, facilitating stable grip during insertion and removal. Furthermore, the anti-slip protrusions are equipped with markings, which are staggered vertically across multiple resistor units. This allows for direct observation of the resistor parameters from above, even when multiple units are stacked in parallel, improving identification efficiency and ease of adjustment. Preferably, the markings are printed with color rings conforming to IEC 60062 standards to indicate the resistor value and tolerance level, further enhancing the identification of resistor parameters during use and meeting the needs of rapid replacement and management in industrial testing scenarios.

[0019] Thirdly, in the drive circuit section, this invention uses an isolated drive chip (model 1EDI 3031ASXUMA1) as the core device of the gate drive module. Two parallel output branches are constructed using its test output pins. Each output branch is connected in series with a Schottky rectifier and a pluggable resistor adjustment module. The two rectifiers have opposite conduction directions, used to activate the corresponding branch under positive or negative drive signal conditions, thereby achieving independent adjustment of the gate's positive / negative drive path resistance and improving waveform control capability during turn-on / turn-off. Furthermore, TVS transient suppression diodes are connected between the drain and gate output terminals and between the gate and source output terminals of the power device to absorb overvoltage spikes generated during drive switching or resistor module replacement, improving the stability and anti-interference performance of the entire drive system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall framework of this utility model;

[0022] Figure 2 This is an assembly diagram of the pluggable resistor adjustment module in this utility model;

[0023] Figure 3 This is a schematic diagram of the pluggable resistor adjustment module according to an embodiment of the present invention;

[0024] Figure 4 and Figure 5 This is a schematic diagram of the circuit structure of the gate drive module of this utility model.

[0025] Figure label:

[0026] 100 - Pluggable resistor adjustment module; 200 - Signal generator; 300 - Gate drive module; 400 - Power device;

[0027] 10-Plug-in resistor unit; 11-Base; 111-Anti-slip ridge; 12-Resistor; 13-Socket; 14-Pin header. Detailed Implementation

[0028] To facilitate understanding by those skilled in the art, the structure of this utility model will now be described in further detail with reference to the accompanying drawings:

[0029] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. The terms "part," "side," "end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0030] This utility model provides a pluggable resistor adjustment module 100, such as Figures 2-3 As shown, the aforementioned pluggable resistor adjustment module 100 includes multiple pluggable resistor units 10 detachably connected in parallel. Each pluggable resistor unit 10 has the same structure, including a base 11 for supporting the component. A resistor 12 is fixed on the base 11 to provide a specific resistance value. Two sockets 13 are provided on the base 11, respectively fixed on opposite sides of the top of the base 11. Two pins 14 are provided at the bottom of the base 11, respectively electrically connected to the two sockets 13 on the top of the base 11. The sockets 13 serve as plug-in interfaces, receiving the pins 14 from other pluggable resistor units. Each pin 14 and its corresponding socket 13 are connected to the resistor 12 through a conductive path, thereby connecting the resistor 12 between the two sockets 13.

[0031] Multiple pluggable resistor units 10 can be stacked vertically by interlocking pins 14 and sockets 13, meaning that the pins 14 of one pluggable resistor unit 10 are inserted into the socket 13 of the next pluggable resistor unit 10, thus allowing multiple resistors 12 to be connected in parallel. By combining different numbers and resistance values ​​of pluggable resistor units 10, the equivalent gate resistance can be flexibly adjusted.

[0032] In one specific embodiment, the bottom pluggable resistor unit 10 of the pluggable resistor adjustment module 100 can be mounted on a printed circuit board (PCB) as the basic connection unit of the entire module. Specifically, the two pins 14 of the bottom pluggable resistor unit 10 are vertically inserted into the reserved holes on the PCB and reliably connected to the conductive pads on the PCB by soldering, thereby realizing the electrical connection between the pluggable resistor adjustment module 100 and the drive circuit. The remaining pluggable resistor units 10 are connected to the lower pluggable resistor unit 10 pin headers 13 through their pins 14, and are vertically connected in sequence to form an electrical parallel relationship.

[0033] like Figures 2-3 As shown, to facilitate insertion and removal operations and improve overall mechanical reliability, each insertion and removal resistor unit 10 has several horizontally arranged anti-slip protrusions 111 on the side of its base 11. These protrusions provide gripping friction during manual insertion and removal, enhancing operational stability. In one specific embodiment, the anti-slip protrusions 111 can be integrally injection molded with the base 11, suitable for high-frequency insertion and removal scenarios in the testing environment.

[0034] Furthermore, a marking section is provided on the outer surface of the anti-slip protrusion 111. When multiple pluggable resistor units 10 are stacked, the anti-slip protrusions 111 are staggered vertically to ensure that the marking sections do not overlap or obstruct each other when viewed from above, thereby improving visual identification efficiency. The marking section carries the parameter information of the pluggable resistor unit 10. Preferably, the marking section uses printed color ring markings conforming to the IEC60062 standard, forming a combination of color rings on the surface of the marking section to indicate the resistance value and tolerance level. For example, a red-red-red-gold color ring indicates a 2.2kΩ, ±5% carbon film resistor.

[0035] Because the anti-slip protrusions 111 are located on the side of the base 11, and the pluggable resistor units 10 are stacked vertically, when the operator observes the entire pluggable resistor adjustment module 100 from directly above the circuit board, all the staggered anti-slip protrusions 111 are exposed and visible, and the corresponding markings are also all within the visible range. This design significantly improves the intuitiveness of parameter identification, making it easier for engineers to quickly read the resistance value information of each pluggable resistor unit 10 in multi-resistor combination debugging scenarios, achieving efficient management, accurate selection, and timely replacement.

[0036] like Figure 1 As shown, this utility model also provides a power device driving circuit for driving the gate of the power device 400 and realizing adjustable control of dynamic characteristics during the turn-on and turn-off processes. The circuit mainly includes a signal generator 200, a gate driving module 300, the power device 400, a pluggable resistor adjustment module 100, and several protection devices and auxiliary components.

[0037] like Figures 4-5 As shown, the gate driver module 300 uses an isolated driver chip U11, model 1ED I 3031ASXUMA1. Its input terminals INP (pin 9) and INN (pin 8) are used to receive differential PWM control signals, and pin 7 (EN) is connected to the enable control circuit. VCC1 (pin 2) and GND1 (pins 1 / 10) form the input-side power supply path, and VCC2 (pin 14) and GND2 (pin 16) form the output-side power supply path. Figure 4 The output power supply filtering network is constructed using multiple decoupling capacitors to improve the power supply stability of the chip under high current drive.

[0038] like Figure 5 As shown, the TOUT pin (pin 13) of chip U11 serves as the drive signal test output terminal, connected to dual output branches for adjusting the rising and falling edge characteristics of the gate drive waveform. Specifically, after the signal is output from this pin, it is conducted to the gate of power device 400 through two parallel output branches. Each output branch is composed of a Schottky rectifier, such as... Figure 5 D17 and D18 in the circuit are connected in series with a set of pluggable resistor adjustment modules 100. The two rectifiers have opposite conduction directions, which are used to conduct the corresponding branches when the TOUT pin outputs a high or low level, forming positive and negative drive paths respectively. The pluggable resistor adjustment module 100 adopts the above-mentioned pin header 14 and female header 13 connection method. By combining pluggable resistor units 10 with different numbers and resistance values, the equivalent gate resistance can be flexibly adjusted, thereby realizing the control of the rising and falling edge slopes of the gate drive waveform, effectively improving the turn-on and turn-off speed of the power device 400, reducing switching losses and voltage spikes, and improving the matching degree of drive performance. In practical applications, users can quickly select and match pluggable resistor units with appropriate resistance values ​​according to the gate charge, voltage response characteristics and other parameters of the target power device 400, avoiding the cumbersome operation and pad damage caused by repeatedly soldering and replacing resistors 12 in traditional solutions, while also improving the efficiency and reliability of testing and debugging.

[0039] like Figure 5 As shown, EXT_GATE_HU, EXT_DRAN_HU, and EXT_GND_HU are used to connect the gate, drain, and source terminals of the power device 400, respectively. EXT_GATE_HU, as the gate drive signal output, is directly connected to the output branch of the driver chip and is used to provide turn-on and turn-off control signals to the gate of the power device 400.

[0040] To accommodate the structural characteristics of the plug-in resistor adjustment module 100, this embodiment includes a suppression branch between EXT_DRAIN_HU and EXT_GATE_HU to absorb gate overshoot voltage and electromagnetic interference, preventing voltage spikes or loop oscillations caused by temporary disconnection of the drive circuit during plugging and unplugging. This suppression branch comprises two SMBJ350CA TVS diodes U18 and U19, and a parallel branch consisting of resistor R178 and capacitor C246. These two parts are connected in series and then in parallel between EXT_DRAIN_HU and EXT_GATE_HU to provide voltage clamping and damping absorption functions under abnormal circuit conditions.

[0041] On the other hand, such as Figure 5 As shown, another protection branch is set between EXT_GATE_HU and EXT_GND_HU, including TVS transistor U20, capacitor C247 and resistor R189, which are used to stabilize the gate reference potential when the plug-in module is not connected or the impedance changes, so as to avoid malfunction caused by the drive signal being floating or coupling interference.

[0042] The proposed power device drive circuit, through the organic combination of a pluggable resistor adjustment mechanism and a multi-path protection design, not only achieves flexible adjustment of the gate drive waveform, but also enhances the stability and safety of the circuit during testing, debugging, and dynamic switching.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A plug-in resistance adjustment module, characterized by, Includes multiple pluggable resistor units (10) that are detachably connected in parallel with each other; The pluggable resistor unit (10) includes a base (11), on which a resistor (12) is fixed. The base (11) is also provided with two female connectors (13) and two pin headers (14) that are electrically connected to the two female connectors (13) respectively. The resistor (12) is electrically connected between the two female connectors (13). Multiple pluggable resistor units (10) are connected to the socket (13) of another pluggable resistor unit via pin headers (14) to achieve parallel connection of multiple resistors (12).

2. A plug-in resistance adjustment module as claimed in claim 1, characterized in that The nut (13) is disposed on the top of the base (11), and the pin (14) is disposed on the bottom of the base (11).

3. A plug-in resistance adjustment module as claimed in claim 2, characterized in that The base (11) has several anti-slip protrusions (111) on its side.

4. A plug-in resistance adjustment module as claimed in claim 3, characterized in that The anti-slip ridge (111) is provided with a marking part, and the anti-slip ridge (111) of the plurality of pluggable resistor units (10) are staggered with each other in the vertical direction, and the marking part is marked with resistance parameter information.

5. A plug-in resistance adjustment module as claimed in claim 4, characterized in that The marking section is printed with color rings according to the IEC60062 standard to indicate the resistance value and tolerance range of the pluggable resistor unit (10).

6. A power device driving circuit characterized by comprising: The device includes a gate drive module (300) and a power device (400). The input terminal of the gate drive module (300) is connected to a signal generator (200) for generating a drive signal to control the power device (400) according to the control signal of the signal generator (200). A plug-in resistor adjustment module as described in any one of claims 1-5 is provided between the gate drive module (300) and the power device (400).

7. A power device driving circuit according to claim 6, wherein The gate drive module (300) includes an isolated drive chip of model 1EDI 3031ASXUMA1 and its peripheral circuits.

8. A power device driving circuit according to claim 7, wherein The test output pin of the driver chip is connected to two output branches connected in parallel. Each of the two output branches includes a series Schottky rectifier and the plug-in resistor adjustment module. The Schottky rectifiers of the two output branches are turned on in opposite directions, respectively, when the drive signal is positive or negative.

9. A power device driving circuit according to claim 6, wherein TVS transient suppression diodes are connected between the drain output terminal and the gate output terminal, and between the gate output terminal and the source output terminal of the power device (400), respectively, to absorb transient overvoltages.

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