Verification device for safe working area of MOS (Metal Oxide Semiconductor) tube
By designing a MOSFET verification device that includes a PCB board, resistors, and transistors, the problem of complex verification of the safe operating area of MOSFETs is solved, and simplified testing and efficient multi-condition testing are achieved, which is suitable for the product development stage.
Patent Information
- Application Number
- CN202423024727.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-09
AI Technical Summary
The verification process for the safe operating area of MOSFETs in the existing technology is complex and requires testing in actual prototypes, which can easily damage the prototypes and makes it impossible to measure their capabilities under various full-load conditions from multiple dimensions.
A verification device for the safe operating area of a MOSFET is provided, comprising a PCB board, resistors, capacitors and transistors. The voltage and load current are regulated by an external control circuit, simplifying the testing process, avoiding board cutting and current clamping, and enabling testing under multiple voltage and load conditions.
It achieves simplicity and completeness in verifying the SOA region of MOSFETs during the R&D phase, avoids prototype damage, reduces testing costs, and provides a cost-effective testing solution.
Smart Images
Figure CN223692470U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to transistor test technical field, concretely is the verification device of MOS tube safe working area. BACKGROUND
[0002] When using MOS tube in circuit, generally will consider his VDS, VGS, IDS etc. breakdown voltage, limiting current etc. parameter, will control the voltage and current of practical application under its parameter standard, because overvoltage overcurrent can directly damage MOS tube device, this is beyond doubt, but there is a very important parameter is MOS tube SOA area, the up and down power of equipment overshoot and normal working environment can make MOS tube VDS, IDS run to the outside of safe working area, long time uses outside the area will greatly reduce the service life of MOS tube, easy to cause the damage of equipment, in order to guarantee that MOS tube can be used in the safe working area in actual circuit, it needs to verify its working capacity under various voltage, current, load etc. conditions, and general MOS tube is used in actual prototype, and the voltage of actual prototype is fixed, cannot multidimensional measurement, and the ability of MOS tube extraction load current is limited, and the capacity under various full load conditions of MOS tube cannot be verified, and the current clamp needs to cut the plate and add the method of flying wire to leave the current measurement position, and the process is relatively complex and causes the irreversible damage of plate, and the prototype is easy to damage. UTILITY MODEL CONTENTS
[0003] The utility model provides MOS tube safe working area's verification device to solve the technical problem that MOS tube safe working area verification process is complex in view of the technical problem in the prior art.
[0004] The technical scheme that the utility model solves the above technical problem is as follows:
[0005] Provide a kind of MOS tube safe working area's verification device, and the verification device includes:
[0006] PCB board, MOS tube pin seat is provided on the PCB board;
[0007] Resistance R1 and resistance R2, resistance R1 and resistance R2 are connected in parallel on the 2nd pin of MOS tube pin seat, the other end of resistance R2 is grounded, and the other end of resistance R1 is connected to the 3rd pin of MOS tube pin seat;
[0008] Resistance R3, one end of resistance R3 is connected on the 3rd pin of MOS tube pin seat, and the other end of resistance R3 is connected to the collector of triode Q1;
[0009] Capacitor C1 and capacitor C2, capacitor C1 and capacitor C2 are connected in parallel between the first foot of the MOS tube foot base and the ground;
[0010] Capacitor C3, one end of capacitor C3 is connected to the ground, the other end is connected to the collector of the triode Q1;
[0011] Triode Q1, the emitter of the triode Q1 is connected to the external electronic load, the base of the triode Q1 is connected to the external control circuit, and the collector of the triode Q1 is connected to the other end of the resistor R3;
[0012] Voltage input source VIN, VIN is connected to the first foot of the MOS tube foot base.
[0013] Further, the voltage adjustment range of the voltage input source VIN is 3.3V, 5V and 12V.
[0014] Further, the resistance of the resistor R1 is 120 ohms, the resistance of the resistor R2 is 200 ohms, and the resistance of the resistor R3 is 0 ohms.
[0015] Further, the capacitance of capacitor C1, capacitor C2 and capacitor C3 is 0.1uf.
[0016] Further, the base of the triode Q1 is controlled by an external circuit to be high or low, for controlling the on or off state of the triode Q1.
[0017] Further, the emitter of the triode Q1 is connected to the external electronic load through the wire, and the external electronic load is used to draw the current, and the current size of the external electronic load can be adjusted.
[0018] The beneficial effects of the utility model are:
[0019] The utility model solves the problem that when verifying the MOS tube SOA working area in the research and development design stage, it is necessary to test after the device board is connected to the MOS tube device. In this way, the board is avoided, the current is clamped, the operation process of the test is simplified. The front end voltage and the rear end load current can be controlled before the test, the completeness and the traversal of the test are realized, and the phenomenon that the existing test method is easy to damage the board and causes resource waste is avoided.
[0020] The utility model discloses can control external VIN and load current, can carry out the measurement of whether the MOS pipe that needs test meets the safe working area under the condition of multiple voltage, multiple load, and the way of oscilloscope test quantity VDS and current clamp clamping lead current is relatively simple, can carry out the verification of multiple fast and effective device, is applicable to product research and development stage. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is the test scheme drawing of the utility model. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following combines the drawings and embodiment, and the utility model is further detailed.The example of the embodiment is shown in the drawings, and the same or similar reference numerals represent the same or similar elements or elements with the same or similar function throughout.The embodiment described below by referring to the drawings is exemplary, and is only used to explain the utility model, and can not be understood as the limitation of the utility model.In addition, it should be understood that the specific embodiment described herein is only used to explain the utility model, and can not be used to limit the utility model.
[0023] In the description of the utility model, it is necessary to explain that, unless there is explicit provision and limitation, the terms "mounting", "connection", "connection" should be understood broadly, for example, can be fixed connection, can be detachable connection, or integrally connected;Can be mechanical connection, or electrical connection or can communicate with each other;It can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements or the interaction relationship of two elements.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.
[0024] The following disclosure provides many different embodiments or examples to realize the different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model. In addition, the utility model can refer to the same number and / or reference letter in different examples, and the repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.
[0025] The utility model provides the following preferred embodiment:
[0026] The embodiment discloses a MOS tube SOA (safe working area) verification device, which is compact in structure and convenient to operate, and is helpful to quickly verify whether the safe working area of the MOS tube meets the requirements in the product design and research and development stage, and provides an effective MOS tube performance test and evaluation means.
[0027] As Figure 1 The utility model provides a MOS tube SOA (safe working area) verification device, including PCB board, the PCB board is equipped with MOS tube pin seat son, resistance R1, resistance R2, resistance R3, electric capacity C1, electric capacity C2, electric capacity C3 and triode Q1, MOS tube pin seat son has three pins, 2 pin parallel connection resistance R1 and resistance R2, the other end of resistance R2 is grounded, the other end of resistance R1 is connected 3 pin, 3 pin connects one end of resistance R3, the other end of resistance R3 connects the collector of triode Q1, one end of electric capacity C3 is grounded, the other end connects the collector of triode Q1, the emitter of triode Q1 connects external electronic load, the base of triode Q1 connects external Control circuit, 1 pin connects voltage input source VIN, one end of electric capacity C1, C2 is grounded, and the other end is connected with 1 pin. Voltage of voltage input source VIN can be 3.3V, 5V, 12V, the resistance of resistance R1 is 120 ohm, the resistance of resistance R2 is 200 ohm, the resistance of resistance R3 is 0 ohm, the electric capacity of electric capacity C1 is 0.1uf, the electric capacity of electric capacity C2 is 0.1uf, the electric capacity of electric capacity C3 is 0.1uf.
[0028] Working principle: 1, voltage input source VIN for MOS tube pin seat for power supply pin end, the power supply voltage is first adjusted to 12V. 2, MOS tube pin seat has 3 pins, for welding the MOS tube to be tested on it, the current CSD25404Q3T MOS tube is used for verification, the pin corresponds as follows: 1 foot for the source S of the MOS tube, the pin is connected with the input voltage VIN, connected to the ground through the series connection of capacitors C1 and C2, capacitors C1 and C2 are 0.1uf, as power input filter capacitor. 2 is the gate G of the MOS tube, connected in parallel with resistor R1 and resistor R2, resistor R1 and resistor R2 are voltage dividing resistors, resistor R1 is 120 ohms, resistor R2 is 200 ohms, 3 is the drain D of the MOS tube, connected in series with resistor R3, resistor R3 is a 0 ohm resistor, which is used for testing here, that is, when current test is needed, the 0 ohm resistor is removed and replaced with a wire connected in series, capacitor C2 is an output voltage filter capacitor with a capacity of 0.1uf; 3, the emitter of the transistor Q1 is connected to the external electronic load through the wire, the collector is connected with resistor R3, and the base is controlled by the external circuit to be high or low level, the transistor Q1 is used as a switch here, when the external input is high level, the transistor is turned on, at this time the electronic load will draw load current, when the external input is low level, the transistor is turned off, at this time the MOS tube and the electronic load are disconnected.
[0029] When the device is used for verification, the MOS tube to be tested is welded on the MOS tube pin seat, and the current CSD25404Q3T MOS tube is used for verification. First, input 12V voltage to VIN, adjust the electronic load to 1A, at this time the transistor Q1 is in the off state, the external control level is high, the transistor Q1 is turned on and is in the conducting state, at this time the electronic load will draw 1A current, the MOS tube is in a working state, so that the external oscilloscope is used to measure, two channels 1, 3 can be connected with voltage probe and current clamp respectively, the voltage probe measures the source S and drain D of the MOS tube, and the real-time voltage VDS can be obtained, the current clamp is clamped on the wire replaced with R3, and the current IDS can be obtained, after a group of waveform data is obtained, whether it meets the safe working area can be analyzed; adjust the load current to 2A, and another group of waveform data can be obtained to analyze the result, so that the maximum use value of the MOS tube safe working area can be obtained; similarly, 12V VIN can be replaced with 5V, 3.3V; the same operation can be performed to obtain whether the MOS tube works in the safe working area under different input voltages; this scheme is simple and low in cost, and has high cost performance. The MOS tube can be maximized in the circuit, which is suitable for product research and development stage, and provides a low cost and easy-to-operate solution.
[0030] The utility model discloses beneficial effect specifically embodied above only for the preferable embodiment of the utility model, and does not use to limit the utility model, any modification, equivalent replacement, improvement etc. that is made in the spirit and principles of the utility model, should be contained in the protection scope of the utility model.
Claims
1. A verification device for the safe operating region of a MOSFET, characterized in that, The verification device comprises: A PCB board, wherein a MOS tube pin seat is arranged on the PCB board; A resistor R1 and a resistor R2 are connected in parallel on the second pin of the MOS tube pin seat, one end of the resistor R2 is grounded, and the other end of the resistor R1 is connected to the third pin of the MOS tube pin seat; A resistor R3, one end of which is connected to the third pin of the MOS tube pin seat, and the other end of which is connected to the collector of a triode Q1; A capacitor C1 and a capacitor C2 are connected in parallel between the first pin of the MOS tube pin seat and the ground; A capacitor C3, one end of which is connected to the ground, and the other end of which is connected to the collector of the triode Q1; The triode Q1, the emitter of which is connected to an external electronic load, the base of which is connected to an external control circuit, and the collector of which is connected to the other end of the resistor R3; A voltage input source VIN, which is connected to the first pin of the MOS tube pin seat.
2. The device for verifying a safe operating area of a MOSFET according to claim 1, wherein The voltage of the voltage input source VIN ranges from 3.3V, 5V to 12V.
3. The device for verifying a safe operating area of a MOSFET according to claim 1 or 2, characterized in that, The resistance of the resistor R1 is 120 ohms, the resistance of the resistor R2 is 200 ohms, and the resistance of the resistor R3 is 0 ohms.
4. The device for verifying a safe operating area of a MOSFET according to claim 3, wherein The capacitance of the capacitor C1, the capacitor C2 and the capacitor C3 is 0.1uf.
5. The MOSFET safe operating area verification apparatus of any one of claims 1, 2, or 4, wherein, The base of the triode Q1 is controlled by an external circuit to be high or low, which is used to control the on or off state of the triode Q1.
6. The device for verifying a safe operating area of a MOSFET according to claim 5, wherein The emitter of the triode Q1 is connected to an external electronic load through a wire, and the external electronic load is used to draw current, and the current size of the external electronic load can be adjusted.