CN204101685U - Power device leak current detection device and Intelligent Power Module checkout equipment - Google Patents
Power device leak current detection device and Intelligent Power Module checkout equipment Download PDFInfo
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- CN204101685U CN204101685U CN201420518418.7U CN201420518418U CN204101685U CN 204101685 U CN204101685 U CN 204101685U CN 201420518418 U CN201420518418 U CN 201420518418U CN 204101685 U CN204101685 U CN 204101685U
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Abstract
The utility model discloses a kind of power device leak current detection device, this circuit comprises high-voltage suppling power, leakage current test unit, power device, the first resistance, slave computer control chip and PC control main frame; High-voltage suppling power is connected with the current input terminal of power device; The detection input end of leakage current test unit is connected with the current output terminal of power device, and it detects output terminal and is connected with the signal input part of slave computer control chip; The current output terminal of power device is also through leakage current test unit ground connection; The first end of the first resistance is connected with the control end of power device, its second end ground connection; The signal output part of slave computer control chip is connected with the input end of PC control main frame, and its control output end is connected with the control end of leakage current test unit.The price of this power device leak current detection device that the utility model provides is cheaper, and this power device leak current detection device can also realize batch detection function.
Description
Technical field
The utility model relates to electronic technology field, particularly a kind of power device leak current detection device and Intelligent Power Module checkout equipment.
Background technology
Semiconductor power device (calling power device in the following text) is the semiconductor devices with process high voltage, big current ability, and its voltage process range can from tens volts to several kilovolts, and its current handling capability reaches as high as a few kiloampere.In prior art, power device is generally used for realizing the frequency conversion of household appliances, transformation, the function such as unsteady flow and power management.Power device be used to frequency conversion, transformation, unsteady flow and power management time, it is be used as switch to use under normal circumstances, and power device is used as switch when using, and its leakage current test when turning off is an important indicator of detection power device quality.
But, in existing detection technique, it is all the leakage current test function realizing power device by special detecting instrument, such as conventional transistor graphic instrument, but transistor graphic instrument is only applicable to the test of individual monomers, and cannot carry out batch testing, and the price of transistor graphic instrument is very expensive, makes this transistor graphic instrument cannot be applied to the Product checking of volume production; In addition, other some detection methods are also also had at present, such as, the leakage currents of integrated suite to power device such as the digital multimeter of NI company, digital power and board are adopted to detect, but this detection method is more loaded down with trivial details, and the price of detecting instrument also costly.
Utility model content
Fundamental purpose of the present utility model is to provide a kind of cheap, and can realize the power device leak current detection device of batch detection function.
For achieving the above object, the utility model provides a kind of power device leak current detection device, described power device leak current detection device comprises power device, for providing the high-voltage suppling power of the power supply of detection of electrical leakage for described power device leakage current detection circuit, for detecting the leakage current signal of described power device when off state, and described leakage current signal is converted to the leakage current test unit of voltage signal, for turning off the first resistance of described power device, for controlling described leakage current test unit to the slave computer control chip of the testing of described leakage current signal and the PC control main frame for storing described leakage current signal and show, wherein,
Described high-voltage suppling power is connected with the current input terminal of described power device; The detection input end of described leakage current test unit is connected with the current output terminal of described power device, and the detection output terminal of described leakage current test unit is connected with the signal input part of described slave computer control chip; The current output terminal of described power device is also through described leakage current test unit ground connection; The first end of described first resistance is connected with the control end of described power device, the second end ground connection of described first resistance; The signal output part of described slave computer control chip is connected with the input end of described PC control main frame, and the control output end of described slave computer control chip is connected with the control end of described leakage current test unit.
Preferably, described leakage current test unit comprises leakage current test resistance, voltage follower, forward proportional amplifier, sampling hold circuit and A/D modular converter; Wherein,
The first end of described leakage current test resistance is connected with the current output terminal of described power device, the second end ground connection of described leakage current test resistance; The input end of described voltage follower is connected with the first end of described leakage current test resistance, and the output terminal of described voltage follower is connected with the input end of described forward proportional amplifier; The output terminal of described forward proportional amplifier is connected with the input end of described sampling hold circuit; The output terminal of described sampling hold circuit is connected with the signal input part of described A/D modular converter, and the control end of described sampling hold circuit is connected with the first control output end of described slave computer control chip; The signal output part of described A/D modular converter is connected with the signal input part of described slave computer control chip, and the control input end of described A/D modular converter is connected with the second control output end of described slave computer control chip.
Preferably, described forward proportional amplifier comprises the first integrated operational amplifier, the second resistance, the 3rd resistance and the 4th resistance; Wherein,
The first end of described second resistance is connected with the output terminal of described voltage follower, and the second end of described second resistance is connected with the positive input terminal of described first integrated operational amplifier; The negative input end of described first integrated operational amplifier is through the 4th resistance eutral grounding, and the output terminal of described first integrated operational amplifier is connected with its positive input terminal through described 3rd resistance.
Preferably, described sampling hold circuit comprises the 5th resistance, the second integrated operational amplifier, gauge tap and the first electric capacity; Wherein,
The first end of described 5th resistance is connected with the output terminal of described first integrated operational amplifier, and the second end of described 5th resistance is connected with one end of institute's gauge tap; The other end of described gauge tap is connected with the positive input terminal of described second integrated operational amplifier, and the control end of described gauge tap is connected with described first control output end of described slave computer control chip; The positive input terminal of described second integrated operational amplifier is also through described first capacity earth, the output terminal of described second integrated operational amplifier is connected with its negative input end, and the output terminal of described second integrated operational amplifier is also connected with the signal input part of described A/D modular converter.
Preferably, described voltage follower comprises the 3rd integrated operational amplifier; The positive input terminal of described 3rd integrated operational amplifier is connected with the first end of described leakage current test resistance, the negative input end of described 3rd integrated operational amplifier is connected with its output terminal, and the output terminal of described 3rd integrated operational amplifier is connected with the first end of described second resistance.
Preferably, described PC control main frame comprises the storage of serial ports, data processing unit and data and display unit; Wherein,
The input end of described data processing unit is connected through the signal output part of described serial ports with described slave computer control chip, and the output terminal of described data processing unit stores with described data and display unit is connected.
Preferably, the described gauge tap in described sampling hold circuit is metal-oxide-semiconductor.
Preferably, described metal-oxide-semiconductor is PMOS.
Preferably, described power device is IGBT pipe.
In addition, for achieving the above object, the utility model also provides a kind of Intelligent Power Module checkout equipment, described Intelligent Power Module checkout equipment comprises power device leak current detection device, described power device leak current detection device comprises power device, for providing the high-voltage suppling power of the power supply of detection of electrical leakage for described power device leakage current detection circuit, for detecting the leakage current signal of described power device when off state, and described leakage current signal is converted to the leakage current test unit of voltage signal, for turning off the first resistance of described power device, for controlling described leakage current test unit to the slave computer control chip of the testing of described leakage current signal and the PC control main frame for storing described leakage current signal and show, wherein,
Described high-voltage suppling power is connected with the current input terminal of described power device; The detection input end of described leakage current test unit is connected with the current output terminal of described power device, and the detection output terminal of described leakage current test unit is connected with the signal input part of described slave computer control chip; The current output terminal of described power device is also through described leakage current test unit ground connection; The first end of described first resistance is connected with the control end of described power device, the second end ground connection of described first resistance; The signal output part of described slave computer control chip is connected with the input end of described PC control main frame, and the control output end of described slave computer control chip is connected with the control end of described leakage current test unit.
The power device leak current detection device that the utility model provides, comprise power device, for providing the high-voltage suppling power of the power supply of detection of electrical leakage for power device leakage current detection circuit, for detecting the leakage current signal of power device when off state, and described leakage current signal is converted to the leakage current test unit of voltage signal, for the first resistance of switch-off power device, for controlling leakage current test unit to the slave computer control chip of the testing of described leakage current signal and the PC control main frame for storing described leakage current signal and show, wherein, high-voltage suppling power is connected with the current input terminal of power device, the detection input end of leakage current test unit is connected with the current output terminal of power device, and the detection output terminal of leakage current test unit is connected with the signal input part of slave computer control chip, the current output terminal of power device is also through leakage current test unit ground connection, the first end of the first resistance is connected with the control end of power device, the second end ground connection of the first resistance, the signal output part of slave computer control chip is connected with the input end of PC control main frame.The price of this power device leak current detection device that the utility model provides is cheaper; Further, this power device leak current detection device can also realize batch detection function.Meanwhile, the utility model also has circuit structure advantage that is simple and that easily realize.
Accompanying drawing explanation
Fig. 1 is the modular structure schematic diagram of the utility model power device leak current detection device one embodiment;
Fig. 2 is the electrical block diagram of the utility model power device leak current detection device one embodiment.
The realization of the utility model object, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of accumulator for communication power supply reverse-connection preventing circuit.
With reference to the modular structure schematic diagram that Fig. 1, Fig. 1 are the utility model power device leak current detection device one embodiments.
In the present embodiment, this power device leak current detection device comprises high-voltage suppling power 101, power device 102, leakage current test unit 103, first resistance R1, slave computer control chip 104 and PC control main frame 105.
Wherein, described high-voltage suppling power 101 is for providing the power supply of detection of electrical leakage for the present embodiment power device leakage current detection circuit;
Described leakage current test unit 103, for detecting the leakage current signal of described power device 102 (i.e. measurand) when off state, and the leakage current signal detected is converted to voltage signal exports described slave computer control chip 104 to;
Described first resistance R1, for turning off described power device 102;
Described slave computer control chip 104, for controlling the testing of described leakage current test unit 103 to described leakage current signal;
PC control main frame 105, for storing described leakage current signal and show.
Particularly, described high-voltage suppling power 101 is connected with the current input terminal of described power device 102; The detection input end of described leakage current test unit 103 is connected with the current output terminal of described power device 102, and the detection output terminal of described leakage current test unit 103 is connected with the signal input part of described slave computer control chip 104; The current output terminal of described power device 102 is also through described leakage current test unit 103 ground connection; The first end of described first resistance R1 is connected with the control end of described power device 102, the second end ground connection of described first resistance R1; The signal output part of described slave computer control chip 104 is connected with the input end of described PC control main frame 105, and the control output end of described slave computer control chip 104 is connected with the control end of described leakage current test unit 103.
With reference to the electrical block diagram that Fig. 2, Fig. 2 are the utility model power device leak current detection device one embodiments.
In the present embodiment, this power device leak current detection device comprises high-voltage suppling power 201, power device 202, leakage current test unit 203, first resistance R21, slave computer control chip 204 and PC control main frame 205.
Wherein, the function of described high-voltage suppling power 201, power device 202, leakage current test unit 203, first resistance R21, slave computer control chip 204 and PC control main frame 205 and annexation each other identical with embodiment illustrated in fig. 1, repeat no more herein.
In the present embodiment, described leakage current test unit 203 comprises leakage current test resistance RS, voltage follower 2031, forward proportional amplifier 2032, sampling hold circuit 2033 and A/D modular converter 2034.
Wherein, the first end of described leakage current test resistance RS is connected with the current output terminal of described power device 202, the second end ground connection of described leakage current test resistance RS; The input end of described voltage follower 2031 is connected with the first end of described leakage current test resistance RS, and the output terminal of described voltage follower 2031 is connected with the input end of described forward proportional amplifier 2032; The output terminal of described forward proportional amplifier 2032 is connected with the input end of described sampling hold circuit 2033; The output terminal of described sampling hold circuit 2033 is connected with the signal input part of described A/D modular converter 2034, and the control end of described sampling hold circuit 2033 is connected with first control output end (scheming non-label) of described slave computer control chip 204; The signal output part of described A/D modular converter 2034 is connected with the signal input part of described slave computer control chip 204, and the control input end of described A/D modular converter 2034 is connected with second control output end (scheming non-label) of described slave computer control chip 204.
In the present embodiment, the conversion work of described A/D modular converter 2034 pairs of signals is triggered by described slave computer control chip 204.
In the present embodiment, described forward proportional amplifier 2032 comprises the first integrated operational amplifier U1, the second resistance R22, the 3rd resistance R23 and the 4th resistance R24.
Particularly, the first end of described second resistance R22 is connected with the output terminal of described voltage follower 2031, and second end of described second resistance R22 is connected with the positive input terminal of described first integrated operational amplifier U1; The negative input end of described first integrated operational amplifier U1 is through the 4th resistance R224 ground connection, and the output terminal of described first integrated operational amplifier U1 is connected with its positive input terminal through described 3rd resistance R23.
In the present embodiment, described sampling hold circuit 2033 comprises the 5th resistance R25, the second integrated operational amplifier U2, gauge tap S1 and the first electric capacity C1.
Particularly, the first end of described 5th resistance R25 is connected with the output terminal of the first integrated operational amplifier U1 in described forward proportional amplifier 2032, and second end of described 5th resistance R25 is connected with one end of institute gauge tap S1; The other end of described gauge tap S1 is connected with the positive input terminal of described second integrated operational amplifier U2, and the control end of described gauge tap S1 is connected with the first control output end of described slave computer control chip 204; The positive input terminal of described second integrated operational amplifier U2 is also through described first electric capacity C1 ground connection, the output terminal of described second integrated operational amplifier U2 is connected with its negative input end, and the output terminal of described second integrated operational amplifier U2 is also connected with the signal input part of described A/D modular converter 2034.
In the present embodiment, the sampling of described sampling hold circuit 2033 pairs of signals keeps duty to be controlled by described slave computer control chip 204.
In the present embodiment, described voltage follower 2031 comprises the 3rd integrated operational amplifier U3; The positive input terminal of described 3rd integrated operational amplifier U3 is connected with the first end of described leakage current test resistance RS, the negative input end of described 3rd integrated operational amplifier U3 is connected with its output terminal, and the output terminal of described 3rd integrated operational amplifier U3 is connected with the first end of described second resistance R22.
In the present embodiment, described PC control main frame 205 comprises serial ports 2051, data processing unit 2052 and data and stores and display unit 2053.
Wherein, the input end of described data processing unit 2052 is connected through the signal output part of described serial ports 2051 with described slave computer control chip 204, and the output terminal of described data processing unit 2052 stores with described data and display unit 2053 is connected.
In the present embodiment, described power device 202 is IGBT pipe, particularly, when described power device 202 is IGBT pipe, the collector (i.e. current input terminal) of this IGBT pipe is connected with described high-voltage suppling power 201, the emitter (i.e. current output terminal) of this IGBT pipe is connected with the detection input end of described leakage current test unit 203, and the gate pole (i.e. control end) of this IGBT pipe is connected with the first end of described first resistance R21.
Further, in the present embodiment, the described gauge tap S1 in described sampling hold circuit 2033 can be PMOS.Particularly, when described gauge tap S1 is PMOS, the grid (i.e. control end) of this PMOS is connected with the first control output end of described slave computer control chip 204, the source electrode of this PMOS is connected with second end of described 5th resistance R25, and the drain electrode of this PMOS is connected with the positive input terminal of described second integrated operational amplifier U2.
The principle of work of the present embodiment power device leak current detection device specifically describes as follows: if when described power device 202 has leakage current to flow through when off state, then this leakage current can flow through leakage current test resistance RS, and this leakage current can produce pressure drop (namely a voltage signal can be detected at the first end of leakage current test resistance RS) at the two ends of leakage current test resistance RS, but under normal circumstances, the leakage current of described power device 202 when off state is very little, therefore, the pressure drop produced at leakage current test resistance RS two ends is also very little.In order to reduce the distortion of the voltage signal detected, the present embodiment increases voltage follower 2031 at the first end (i.e. voltage signal output end) of leakage current test resistance RS.Voltage follower 2031 is impedance inverter circuit, and the feature of voltage follower 2031 is output impedance is infinitely great, and therefore, this voltage follower 2031 can reduce distorted signals effectively.In the present embodiment, because the voltage signal detected is generally tens millivolts, therefore, the present embodiment connects a forward proportional amplifier 2032 after voltage follower 2031, the voltage signal that forward proportional amplifier 2032 pairs of voltage followers 2031 export carries out amplification process, the voltage signal of tens millivolts is enlarged into the voltage signal of a few volt, the amplification coefficient of described forward proportional amplifier 2032 is determined by the resistance of the second resistance R22 and the 3rd resistance R23.In the present embodiment, in order to impedance matching, choose the 4th resistance R24=R22//R23 (namely in the present embodiment, the 4th resistance R24 equals the resistance after the second resistance R22 and the 3rd resistance R23 parallel connection), the amplification coefficient A=1+R23/R22 of described forward proportional amplifier 2032.Further, the present embodiment connects a sampling hold circuit 2033 after forward proportional amplifier 2032, and the function of described sampling hold circuit 2033 prevents sign mutation.When sampling hold circuit 2033 works, slave computer control chip 204 exports the control end controlling signal to gauge tap S1 accordingly, gauge tap S1 is closed, the voltage signal that now leakage current test resistance RS first end exports passes through voltage follower 2031, charge to after forward proportional amplifier 2032 the first electric capacity C1 in sampling hold circuit 2033, after charging complete, slave computer control chip 204 exports the control end controlling signal to gauge tap S1 accordingly, gauge tap S1 is disconnected, now the voltage at the first electric capacity C1 two ends is the voltage of voltage after amplifying that leakage current test resistance RS first end exports.Because the impedance of the second integrated operational amplifier U2 in sampling hold circuit 2033 is very high, therefore, can keep very little rate of change in long-time by the voltage at the known first electric capacity C1 two ends of the charge-discharge principle of electric capacity, the sampling hold circuit 2033 namely in the present embodiment can prevent sign mutation effectively.Voltage signal after sampling keeps by sampling hold circuit 2033 is delivered to gives A/D modular converter 2034, A/D modular converter 2034 its new signal input end is received analog quantity voltage signal be converted to digital quantity voltage signal, and digital quantity voltage signal is exported to give slave computer control chip 204, slave computer control chip 204 exports the digital quantity voltage signal received the serial ports 2051 of PC control main frame 205 to, serial ports 2051 exports this digital quantity voltage signal to data processing unit 2052, digital quantity voltage signal is reduced to described leakage current signal by data processing unit 2052, and described leakage current signal is exported to data storage and display unit 2053, for data storage and display unit 2053, described leakage current signal is stored and shown.
The power device leak current detection device that the present embodiment provides, comprise power device, for providing the high-voltage suppling power of the power supply of detection of electrical leakage for power device leakage current detection circuit, for detecting the leakage current signal of power device when off state, and described leakage current signal is converted to the leakage current test unit of voltage signal, for the first resistance of switch-off power device, for controlling leakage current test unit to the slave computer control chip of the testing of described leakage current signal and the PC control main frame for storing described leakage current signal and show, wherein, high-voltage suppling power is connected with the current input terminal of power device, the detection input end of leakage current test unit is connected with the current output terminal of power device, and the detection output terminal of leakage current test unit is connected with the signal input part of slave computer control chip, the current output terminal of power device is also through leakage current test unit ground connection, the first end of the first resistance is connected with the control end of power device, the second end ground connection of the first resistance, the signal output part of slave computer control chip is connected with the input end of PC control main frame.The price of this power device leak current detection device that the present embodiment provides is cheaper, and this power device leak current detection device can also realize batch detection function.Meanwhile, the present embodiment also has circuit structure advantage that is simple and that easily realize.
The utility model also provides a kind of Intelligent Power Module checkout equipment, and this Intelligent Power Module checkout equipment comprises power device leak current detection device, and the circuit structure of this power device leak current detection device can refer to above-described embodiment, does not repeat them here.Naturally, Intelligent Power Module checkout equipment due to the present embodiment have employed the technical scheme of above-mentioned power device leak current detection device, and therefore this Intelligent Power Module checkout equipment has all beneficial effects of above-mentioned power device leak current detection device.
These are only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every utilize the utility model instructions and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. a power device leak current detection device, it is characterized in that, comprise power device, for providing the high-voltage suppling power of the power supply of detection of electrical leakage for described power device leakage current detection circuit, for detecting the leakage current signal of described power device when off state, and described leakage current signal is converted to the leakage current test unit of voltage signal, for turning off the first resistance of described power device, for controlling described leakage current test unit to the slave computer control chip of the testing of described leakage current signal and the PC control main frame for storing described leakage current signal and show, wherein,
Described high-voltage suppling power is connected with the current input terminal of described power device; The detection input end of described leakage current test unit is connected with the current output terminal of described power device, and the detection output terminal of described leakage current test unit is connected with the signal input part of described slave computer control chip; The current output terminal of described power device is also through described leakage current test unit ground connection; The first end of described first resistance is connected with the control end of described power device, the second end ground connection of described first resistance; The signal output part of described slave computer control chip is connected with the input end of described PC control main frame, and the control output end of described slave computer control chip is connected with the control end of described leakage current test unit.
2. power device leak current detection device as claimed in claim 1, it is characterized in that, described leakage current test unit comprises leakage current test resistance, voltage follower, forward proportional amplifier, sampling hold circuit and A/D modular converter; Wherein,
The first end of described leakage current test resistance is connected with the current output terminal of described power device, the second end ground connection of described leakage current test resistance; The input end of described voltage follower is connected with the first end of described leakage current test resistance, and the output terminal of described voltage follower is connected with the input end of described forward proportional amplifier; The output terminal of described forward proportional amplifier is connected with the input end of described sampling hold circuit; The output terminal of described sampling hold circuit is connected with the signal input part of described A/D modular converter, and the control end of described sampling hold circuit is connected with the first control output end of described slave computer control chip; The signal output part of described A/D modular converter is connected with the signal input part of described slave computer control chip, and the control input end of described A/D modular converter is connected with the second control output end of described slave computer control chip.
3. power device leak current detection device as claimed in claim 2, it is characterized in that, described forward proportional amplifier comprises the first integrated operational amplifier, the second resistance, the 3rd resistance and the 4th resistance; Wherein,
The first end of described second resistance is connected with the output terminal of described voltage follower, and the second end of described second resistance is connected with the positive input terminal of described first integrated operational amplifier; The negative input end of described first integrated operational amplifier is through the 4th resistance eutral grounding, and the output terminal of described first integrated operational amplifier is connected with its positive input terminal through described 3rd resistance.
4. power device leak current detection device as claimed in claim 3, it is characterized in that, described sampling hold circuit comprises the 5th resistance, the second integrated operational amplifier, gauge tap and the first electric capacity; Wherein,
The first end of described 5th resistance is connected with the output terminal of described first integrated operational amplifier, and the second end of described 5th resistance is connected with one end of institute's gauge tap; The other end of described gauge tap is connected with the positive input terminal of described second integrated operational amplifier, and the control end of described gauge tap is connected with described first control output end of described slave computer control chip; The positive input terminal of described second integrated operational amplifier is also through described first capacity earth, the output terminal of described second integrated operational amplifier is connected with its negative input end, and the output terminal of described second integrated operational amplifier is also connected with the signal input part of described A/D modular converter.
5. power device leak current detection device as claimed in claim 4, it is characterized in that, described voltage follower comprises the 3rd integrated operational amplifier; The positive input terminal of described 3rd integrated operational amplifier is connected with the first end of described leakage current test resistance, the negative input end of described 3rd integrated operational amplifier is connected with its output terminal, and the output terminal of described 3rd integrated operational amplifier is connected with the first end of described second resistance.
6. power device leak current detection device as claimed in claim 1, is characterized in that, described PC control main frame comprises serial ports, data processing unit and data and stores and display unit; Wherein,
The input end of described data processing unit is connected through the signal output part of described serial ports with described slave computer control chip, and the output terminal of described data processing unit stores with described data and display unit is connected.
7. power device leak current detection device as claimed in claim 4, it is characterized in that, the described gauge tap in described sampling hold circuit is metal-oxide-semiconductor.
8. power device leak current detection device as claimed in claim 7, it is characterized in that, described metal-oxide-semiconductor is PMOS.
9. power device leak current detection device as claimed in claim 1, is characterized in that, described power device is IGBT pipe.
10. an Intelligent Power Module checkout equipment, is characterized in that, described Intelligent Power Module checkout equipment comprises the power device leak current detection device according to any one of claim 1 to 9.
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Cited By (6)
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CN104198907A (en) * | 2014-09-10 | 2014-12-10 | 广东美的集团芜湖制冷设备有限公司 | Power device current leakage detecting device and intelligent power module detecting equipment |
CN107390077A (en) * | 2017-07-31 | 2017-11-24 | 广东美的制冷设备有限公司 | Method of testing, test device and computer-readable recording medium |
CN109709465A (en) * | 2019-01-02 | 2019-05-03 | 电子科技大学 | A kind of MOSFET leakage current extraction circuit |
CN110470940A (en) * | 2019-08-22 | 2019-11-19 | 深圳市三旺通信股份有限公司 | A method of detection casing leakage current simultaneously issues alarm |
CN113671340A (en) * | 2021-10-21 | 2021-11-19 | 佛山市联动科技股份有限公司 | Switch parameter testing device of IGBT |
CN117278004A (en) * | 2023-11-21 | 2023-12-22 | 拓尔微电子股份有限公司 | Comparison circuit |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN104198907A (en) * | 2014-09-10 | 2014-12-10 | 广东美的集团芜湖制冷设备有限公司 | Power device current leakage detecting device and intelligent power module detecting equipment |
CN107390077A (en) * | 2017-07-31 | 2017-11-24 | 广东美的制冷设备有限公司 | Method of testing, test device and computer-readable recording medium |
CN109709465A (en) * | 2019-01-02 | 2019-05-03 | 电子科技大学 | A kind of MOSFET leakage current extraction circuit |
CN109709465B (en) * | 2019-01-02 | 2020-10-27 | 电子科技大学 | MOSFET leakage current extraction circuit |
CN110470940A (en) * | 2019-08-22 | 2019-11-19 | 深圳市三旺通信股份有限公司 | A method of detection casing leakage current simultaneously issues alarm |
CN113671340A (en) * | 2021-10-21 | 2021-11-19 | 佛山市联动科技股份有限公司 | Switch parameter testing device of IGBT |
CN117278004A (en) * | 2023-11-21 | 2023-12-22 | 拓尔微电子股份有限公司 | Comparison circuit |
CN117278004B (en) * | 2023-11-21 | 2024-02-06 | 拓尔微电子股份有限公司 | Comparison circuit |
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