CN205749797U - Audion reverse characteristic tester - Google Patents
Audion reverse characteristic tester Download PDFInfo
- Publication number
- CN205749797U CN205749797U CN201521030094.3U CN201521030094U CN205749797U CN 205749797 U CN205749797 U CN 205749797U CN 201521030094 U CN201521030094 U CN 201521030094U CN 205749797 U CN205749797 U CN 205749797U
- Authority
- CN
- China
- Prior art keywords
- audion
- module
- chip microcomputer
- adjustable
- current pulse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
nullA kind of audion reverse characteristic tester，Including power module、Measurement module、Clamp circuit、Adjustable current pulse module、Detection module、Main control module and host computer，Described power module includes adjustable DC power supply and inductance，Described measurement module includes audion，Described audion includes base stage、Collector and emitter，Described adjustable DC power supply is connected with the colelctor electrode of audion by inductance，Described main control module includes single-chip microcomputer，The control end of described adjustable current pulse module is connected with single-chip microcomputer，The pulse output end of adjustable current pulse module is connected with the base stage of audion，Clamp circuit respectively with the colelctor electrode of audion、Emitter stage is connected，The sampling end of described detection module is connected with measurement module，Described host computer uses RS232 serial communication line to be connected with single-chip microcomputer，The rational reverse biased value that audion can bear can be measured，Avoid audion in switching power circuit works because voltage arranges circuit infringement that is unreasonable and that produce.
Description
Technical field
This utility model relates to electronic technology and semiconductor device detection field, is specifically related to a kind of audion reverse characteristic tester.
Background technology
Along with kind and the increase at full speed of quantity of transistor, the continuous extension of range of application, the safety applications of transistor is by severe challenge.In terms of power transistor test instrunment, overseas equipment is leading, can study comparative maturity for audion amplification β, T switch time, saturation voltage drop VCES, forward voltage drop UBE, thermal resistance, second breakdown etc. field.All there is detecting the power transistor test instrunment of various parameters both at home and abroad.But external instrument is costly, is difficult to safeguard, and the price of domestic instrument is high after purchase, and test function is complicated, for general circuit designers, does not also have a suitably to realize measurement apparatus the most easily.
Utility model content
This utility model is in order to overcome the above-mentioned deficiency of prior art, it is provided that a kind of audion reverse characteristic tester that can measure the rational reverse biased value that audion can bear.
nullFor achieving the above object，This utility model provides a kind of audion reverse characteristic tester，Including power module、Measurement module、Clamp circuit、Adjustable current pulse module、Detection module、Main control module and host computer，Described power module includes adjustable DC power supply and inductance，Described measurement module includes audion，Described audion includes base stage、Collector and emitter，Described adjustable DC power supply is connected with the colelctor electrode of audion by inductance，Described main control module includes single-chip microcomputer，The control end of described adjustable current pulse module is connected with single-chip microcomputer，The pulse output end of adjustable current pulse module is connected with the base stage of audion，Described clamp circuit respectively with the colelctor electrode of audion、Emitter stage is connected for the reverse biased setting between the colelctor electrode of detection transistor and emitter stage，The sampling end of described detection module is connected for the collector current of detection transistor with measurement module、Reverse biased，The signal output part of described detection module is connected with the sampling end of single-chip microcomputer，Described host computer uses RS232 serial communication line to be connected with single-chip microcomputer.
As optimal technical scheme of the present utility model, between described single-chip microcomputer and adjustable current pulse module, detection module and host computer, it is equipped with photoisolator.
As optimal technical scheme of the present utility model, between described adjustable current pulse module and the base stage of audion, it is additionally provided with current-limiting resistance.
As optimal technical scheme of the present utility model, described host computer uses USB interface to connect RS232 serial communication line, and carries out communication with single-chip microcomputer.
As optimal technical scheme of the present utility model, described USB interface uses USB isolating chip to carry out port isolation.
Audion reverse characteristic tester of the present utility model can reach following beneficial effect:
nullAudion reverse characteristic tester of the present utility model，By including power module、Measurement module、Clamp circuit、Adjustable current pulse module、Detection module、Main control module and host computer，Described power module includes adjustable DC power supply and inductance，Described measurement module includes audion，Described audion includes base stage、Collector and emitter，Described adjustable DC power supply is connected with the colelctor electrode of audion by inductance，Described main control module includes single-chip microcomputer，The control end of described adjustable current pulse module is connected with single-chip microcomputer，The pulse output end of adjustable current pulse module is connected with the base stage of audion，Described clamp circuit respectively with the colelctor electrode of audion、Emitter stage is connected for the reverse biased setting between the colelctor electrode of detection transistor and emitter stage，The sampling end of described detection module is connected for the collector current of detection transistor with measurement module、Reverse biased，The signal output part of described detection module is connected with the sampling end of single-chip microcomputer，Described host computer uses RS232 serial communication line to be connected with single-chip microcomputer，The rational reverse biased value that audion can bear can be measured，Avoid audion in switching power circuit works because voltage arranges circuit infringement that is unreasonable and that produce，Tester the most of the present utility model can pass through simulation test，Guarantee audion can safe shutdown and avoid breakdown，Ensure the safe operation of design of electronic circuits.
Accompanying drawing explanation
With detailed description of the invention, this utility model is described in further detail below in conjunction with the accompanying drawings.
The system architecture diagram of the example that Fig. 1 provides for this utility model audion reverse characteristic tester.
Fig. 2 is triode switch schematic diagram.
The audion measuring principle figure of the example that Fig. 3 provides for this utility model audion reverse characteristic tester.
Fig. 4 is audion IC, VCE output waveform of this utility model audion reverse characteristic tester.
The realization of this utility model purpose, functional characteristics and advantage will in conjunction with the embodiments, are described further referring to the drawings.
Detailed description of the invention
Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.
nullAudion reverse characteristic tester as shown in Figure 1，Including power module、Measurement module、Clamp circuit、Adjustable current pulse module、Detection module、Main control module and host computer，Described power module includes adjustable DC power supply and inductance，Described measurement module includes audion，Described audion includes base stage B、Colelctor electrode C and emitter E，Described adjustable DC power supply VCC is connected with the colelctor electrode C of audion by inductance Lc，Described main control module includes single-chip microcomputer，The control end of described adjustable current pulse module is connected with single-chip microcomputer，The pulse output end of adjustable current pulse module is connected with base stage B of audion，Described clamp circuit respectively with the colelctor electrode C of audion、Emitter E is connected reverse biased VCE between colelctor electrode C and the emitter E setting detection transistor，The sampling end of described detection module is connected with measurement module for the collector current IC of detection transistor、Reverse biased VCE，The signal output part of described detection module is connected with the sampling end of single-chip microcomputer，Described host computer uses RS232 serial communication line to be connected with single-chip microcomputer.
In being embodied as, described single-chip microcomputer and adjustable current pulse module, photoisolator it is equipped with between detection module and host computer, owing to being mutually isolated between photoisolator input and output, signal of telecommunication transmission has the features such as unipolarity, thus there is good electrical isolation capabilities and capacity of resisting disturbance, it is greatly improved the noise ratio that signal produces, can effectively prevent adjustable current pulse module, the interference to single-chip microcomputer of the external device such as detection module and host computer, improve control and the accuracy of detection of single-chip microcomputer, it is additionally provided with current-limiting resistance RB between described adjustable current pulse module and base stage B of audion.
Described host computer uses USB interface to connect RS232 serial communication line, and carries out communication with single-chip microcomputer, and described USB interface uses USB isolating chip to carry out port isolation.
In order to allow those skilled in the art be more fully understood that and realize the technical solution of the utility model, the using method of the present embodiment is explained in detail below.
Triode switch schematic diagram as shown in Figure 2, three electrodes of audion are respectively emitter E, base stage B, colelctor electrode C, audion is current control device, base current IB can be with domination set electrode current IC, as base current IB > 0, collector current IC is not equal to 0, and corresponding circuits has electric current to pass through, and is equivalent to switch closed condition；When base current IB≤0, collector current IC=0, corresponding circuits does not has electric current, is equivalent to the off-state of switch.
Audion measuring principle figure as shown in Figure 3, by controlling to flow into the size of base current IB, control the on off state of audion, come analogue measurement pliotron be used as switching power circuit time duty, as base current IB > 0, collector current IC inductance effect lower linear rise, when arriving the current value set, immediately turning off IB electric current, collector current IC answers linear decline under inductance effect in theory, it is achieved rapidly switch off.Now inductance produces the clamp circuit conducting simultaneously of instantaneous induction electromotive force, at this moment reverse biased value VCE set from clamp circuit will be born in collector and emitter the two poles of the earth of audion, VCE not can exceed that breakdown reverse voltage, otherwise collector current IC will be increased dramatically, thermal breakdown can be produced in this place or electric current punctures, audion generation second breakdown can be caused, cause that audion is permanent to be burnt, have a strong impact on the safety and reliability that electronic equipment runs.
Audion reverse characteristic tester in test process without occur second breakdown, the waveform of IB, IC, VCE of this process, as shown in Figure 4.If audion can successfully turn off, IC is by rapid decrease (time general about 1us), and the reverse biased that now audion is born is usually closer to 0, by linear rise to the clamped voltage value VCE set under inductance and clamp circuit effect.If detecting in testing time section, VCE is pre-set value, it was demonstrated that VCE can keep and IC can thoroughly turn off.If an avalanche happened punctures and can not immediately turn off for audion, IC will slowly decline and continues, now audion can not in default electric current IC and magnitude of voltage VCE trouble free service.
Therefore this utility model is passed through, the rational reverse biased value that audion can bear can be doped, avoid audion in switching power circuit works because voltage arranges circuit infringement that is unreasonable and that produce, this utility model can pass through simulation test simultaneously, guarantee audion can safe shutdown and avoid breakdown, ensure design of electronic circuits safe operation.
Although the foregoing describing detailed description of the invention of the present utility model; but those skilled in the art are to be understood that; these are merely illustrative of; present embodiment can be made various changes or modifications; without departing from principle of the present utility model and essence, protection domain of the present utility model is only limited by the claims that follow.
Claims (5)
- null1. an audion reverse characteristic tester，It is characterized in that，Including power module、Measurement module、Clamp circuit、Adjustable current pulse module、Detection module、Main control module and host computer，Described power module includes adjustable DC power supply and inductance，Described measurement module includes audion，Described audion includes base stage、Collector and emitter，Described adjustable DC power supply is connected with the colelctor electrode of audion by inductance，Described main control module includes single-chip microcomputer，The control end of described adjustable current pulse module is connected with single-chip microcomputer，The pulse output end of adjustable current pulse module is connected with the base stage of audion，Described clamp circuit respectively with the colelctor electrode of audion、Emitter stage is connected for the reverse biased setting between the colelctor electrode of detection transistor and emitter stage，The sampling end of described detection module is connected with measurement module for the collector current of detection transistor and reverse biased，The signal output part of described detection module is connected with the sampling end of single-chip microcomputer，Described host computer uses RS232 serial communication line to be connected with single-chip microcomputer.
- 2. according to the audion reverse characteristic tester described in claim 1, it is characterised in that be equipped with photoisolator between described single-chip microcomputer and adjustable current pulse module, detection module and host computer.
- 3. according to the audion reverse characteristic tester described in claim 2, it is characterised in that be additionally provided with current-limiting resistance between described adjustable current pulse module and the base stage of audion.
- 4. according to the audion reverse characteristic tester described in any one of claims 1 to 3, it is characterised in that described host computer uses USB interface to connect RS232 serial communication line, and carries out communication with single-chip microcomputer.
- 5. according to the audion reverse characteristic tester described in claim 4, it is characterised in that described USB interface uses USB isolating chip to carry out port isolation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521030094.3U CN205749797U (en) | 2015-12-14 | 2015-12-14 | Audion reverse characteristic tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521030094.3U CN205749797U (en) | 2015-12-14 | 2015-12-14 | Audion reverse characteristic tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205749797U true CN205749797U (en) | 2016-11-30 |
Family
ID=57388243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521030094.3U Expired - Fee Related CN205749797U (en) | 2015-12-14 | 2015-12-14 | Audion reverse characteristic tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205749797U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107765160A (en) * | 2017-08-29 | 2018-03-06 | 全球能源互联网研究院有限公司 | The test circuit and method of testing of a kind of IGBT device |
| CN113495204A (en) * | 2021-06-03 | 2021-10-12 | 中国振华集团永光电子有限公司（国营第八七三厂） | Switching time test system for small power tube |
-
2015
- 2015-12-14 CN CN201521030094.3U patent/CN205749797U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107765160A (en) * | 2017-08-29 | 2018-03-06 | 全球能源互联网研究院有限公司 | The test circuit and method of testing of a kind of IGBT device |
| CN113495204A (en) * | 2021-06-03 | 2021-10-12 | 中国振华集团永光电子有限公司（国营第八七三厂） | Switching time test system for small power tube |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108508342B (en) | IGBT short circuit overcurrent detection circuit | |
| CN108318797A (en) | System and method for desaturation detection | |
| CN106771951A (en) | Electronic power switch device junction temperature on-Line Monitor Device, detection circuit and method of testing | |
| CN103063979B (en) | Load open-circuit detection circuit | |
| CN205545179U (en) | IGBT overflows detection circuitry and current foldback circuit | |
| CN103592592A (en) | IGBT switch characteristic test circuit and IGBT switch characteristic test method | |
| CN109507487B (en) | Thyristor trigger pulse signal detection circuit | |
| CN109471021B (en) | Device and method for detecting opening and closing performance of high-voltage circuit breaker | |
| CN206362890U (en) | Electronic power switch device junction temperature on-Line Monitor Device, detection circuit | |
| CN101051743B (en) | Over-temperature protection circuit for transformer in reverse exciting topological power | |
| CN103545792B (en) | inverter over-current protection circuit and method based on ACS710 | |
| CN205749797U (en) | Audion reverse characteristic tester | |
| CN203732715U (en) | Electric energy meter withstand voltage test device | |
| CN103926516B (en) | Online diode detection circuit | |
| CN204536413U (en) | A kind of IGBT collector voltage metering circuit | |
| CN107389994A (en) | A kind of configurable pin multiplexing method and system applied to current sensor chip | |
| CN108666981A (en) | A kind of IGBT current foldback circuits and method | |
| CN206712450U (en) | A kind of insulated gate bipolar transistor protection circuit | |
| CN206379719U (en) | Overcurrent protection peripheral circuit and electrical equipment | |
| Jiang et al. | An experimental method for extracting stray inductance of bus bars without high bandwidth current measurement | |
| CN208608973U (en) | A kind of current foldback circuit | |
| CN102043080B (en) | Current sampling circuit of high-frequency charger | |
| CN207965047U (en) | Metal-oxide-semiconductor Working state checking circuit | |
| CN203337781U (en) | Power supply detection circuit, power supply circuit and electronic equipment | |
| CN214335148U (en) | Novel circuit breaker mechanical characteristic measurement auxiliary device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20181214 |