CN202119878U - High voltage test power supply special circuit for simulating integrated circuit test system - Google Patents
High voltage test power supply special circuit for simulating integrated circuit test system Download PDFInfo
- Publication number
- CN202119878U CN202119878U CN2011201157721U CN201120115772U CN202119878U CN 202119878 U CN202119878 U CN 202119878U CN 2011201157721 U CN2011201157721 U CN 2011201157721U CN 201120115772 U CN201120115772 U CN 201120115772U CN 202119878 U CN202119878 U CN 202119878U
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- circuit
- control circuit
- current
- high voltage
- power supply
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Abstract
A high voltage test power supply special circuit for simulating an integrated circuit test system is provided. The special circuit is composed of a precision DA converting circuit, a boost-strap special control circuit, a current control circuit, a precision current measuring circuit and a high voltage measuring circuit. The precision DA converting circuit is respectively connected with the boost-strap special control circuit and the current control circuit, the boost-strap special control circuit is connected with the high voltage measuring circuit, the current control circuit is connected with the precision current measuring circuit, and the current control circuit is connected with the boost-strap special control circuit. By adopting the special circuit, the technical problem that secondary tests are needed by parts of high voltage products is solved.
Description
Technical field
The utility model relates to a kind of Hi-pot test power supply special circuit that is used for the Analogous Integrated Electronic Circuits test macro, belongs to the ic test technique field.
Background technology
General Analogous Integrated Electronic Circuits test macro can only be tested the low pressure parameter below the 50V; High voltage parameter will use other special tester to accomplish test; Usually need use conventional simulation test machine to accomplish the test of low pressure parameter for the IC product that contains high voltage parameter like this; Use other special testers (like the discrete device test machine) to accomplish the test of high voltage parameter again, so not only reduced the testing efficiency of IC, also brought trouble to production management.
After adopting this Hi-pot test power supply special circuit, not only realized height, forced down the target of parameter, also can effectively reduce testing cost, also improved reliability of testing result simultaneously same test machine completion test.
Summary of the invention
The purpose of the utility model is to overcome the deficiency of above-mentioned existence; Provide a kind of reasonable in design, can provide the test of 1000V/50mA to use power supply, solve the high voltage parameter test of part A CDC, DCDC class circuit, the Hi-pot test power supply special circuit that is used for the simulation of integrated circuit test macro that reliability is high.
The purpose of the utility model is accomplished through following technical scheme; A kind of Hi-pot test power supply special circuit that is used for the Analogous Integrated Electronic Circuits test macro, it is made up of accurate DA change-over circuit, Bootstrap dedicated control circuit, current control circuit, precision current metering circuit and high-voltage measuring circuit; Described accurate DA change-over circuit connects Bootstrap dedicated control circuit and current control circuit respectively; Described Bootstrap dedicated control circuit one tunnel connects another road output of high-voltage measuring circuit; Described current control circuit one tunnel connects another road output of precision current metering circuit; Described current control circuit connects the Bootstrap dedicated control circuit.
The utility model compared with prior art has following positive effect: 1, reasonable in design; 2, reached the fan-out capability of 1000V; 3, solved and partly carried out the inconvenience that second test brings quality management with the high pressure product needed.
Description of drawings
Fig. 1 is that each module of the utility model embodiment connects synoptic diagram.
Fig. 2 is the circuit diagram of the accurate DA modular converter of the utility model embodiment.
Fig. 3 is the utility model embodiment Bootstrap dedicated control circuit figure.
Fig. 4 is the utility model embodiment current control circuit figure.
Fig. 5 is the utility model embodiment precision current metering circuit figure.
Fig. 6 is the utility model embodiment high-voltage measuring circuit figure.
Embodiment
To combine accompanying drawing that the utility model is done detailed introduction below: as shown in Figure 1: a kind of Hi-pot test power supply special circuit that is used for the Analogous Integrated Electronic Circuits test macro, it is made up of accurate DA change-over circuit 1, Bootstrap dedicated control circuit 2, current control circuit 3, precision current metering circuit 4 and high-voltage measuring circuit 5; Described accurate DA change-over circuit 1 connects Bootstrap dedicated control circuit 2 and current control circuit 3 respectively; Described Bootstrap dedicated control circuit 2 one tunnel connects high-voltage measuring circuit 5 another road outputs; Described current control circuit 3 one tunnel connects 4 another road outputs of precision current metering circuit; Described current control circuit 3 connects Bootstrap dedicated control circuit 2; When high-voltage power supply output is worked as voltage source, can cooperate with precision current metering circuit 4 tested IC testing high voltage leakage current, I measures the nA level; When high-voltage power supply is worked as current source, cooperate tested IC testing high voltage with high-voltage measuring circuit 5 withstand voltage, the highest 1000V that measures.These two parameters are that great majority contain the parameter that high pressure IC need test, and just can solve this type of test problem quickly and efficiently with the utility model instance.
As shown in Figure 2; Accurate DA change-over circuit 1 mainly is made up of 16 DA converters of a slice; This module is as the control signal source of power supply output value, therefore, adopts 16 DA converter can guarantee the output accuracy of power supply; Adjustable resistance VR001 conditioning signal output gain in the circuit, adjustable resistance VR002 regulates the output offset amount.Output area-the 10.000V of actual signal arrives+10.000V.This module is that high-voltage power supply provides accurate Control of Voltage offset signal or current controlled biasing signal, according to working line type difference corresponding bias control signal is provided during actual the use.
As shown in Figure 3; Bootstrap dedicated control circuit 2 can provide the high pressure programmable power supply of 0-1000V, can realize the output voltage of the accurate control of the offset signal 0-1000V of 0-10V having solved the difficult problem with the output of low-voltage signal control high pressure well through this circuit; Offset signal is through the E pole tension of amplifier U003 output control T001; Through the bootstrap circuit boost output HIGH voltage that T002 control T003-T015 forms, the output voltage precision is controlled by R034, R007, because output terminal has designed the current-limiting resistance of R033; Therefore can prevent output overloading or short circuit; The design of D005 mainly is to prevent output overvoltage and since circuit design relevant holding circuit, security is guaranteed during actual the use.
As shown in Figure 4, the main task of current control circuit 3 is when needing test I C withstand voltage, by this circuit precise current is provided, and according to the performance of tested IC the high pressure output current is provided by bootstrap circuit boost.Its ultimate principle is through BIASI offset signal control amplifier; Produce the current source that enough fan-out capabilities are arranged through the special power amplifying circuit; The signal that after R078 resistance sampling and difference amplification, produces is as current feedback; Owing in backfeed loop, adopted the U006 voltage follower, actual flow is the electric current that will control through the electric current of R078 fully, thereby has realized the purpose of accurate control.
As shown in Figure 5; Precision current metering circuit 4 main tasks are accurately to measure electric current, and when the bootstrap circuit boost output HIGH voltage, tested leakage current measurement just needs to realize with this circuit; Its ultimate principle is that output HKVE is 0V when BIASV is 0; Electric current through the outside input produces pressure drop on sampling resistor R078, convert to and electric current corresponding voltage signal ADI after amplifying through difference, can be received by host computer after this signal is changed through A/D and handle.
As shown in Figure 6; The main task of high-voltage measuring circuit 5 is withstand voltages of the tested IC of test, because generally this withstand voltage parameter is between 100-1000V, conventional measurement circuit is damaged easily; After adopting the input protection circuit in this circuit, the security of metering circuit has obtained guarantee.In order to reach the purpose of accurate measurement, adopted the method for dividing range to measure to improve measuring accuracy in addition.
The utility model can reach the fan-out capability of 50mA and 1000V.
In addition, need to prove, allly conceive equivalence or the simple change that described structure, characteristic and principle are done, include in the protection domain of the utility model patent according to the utility model patent.
Claims (1)
1. Hi-pot test power supply special circuit that is used for the Analogous Integrated Electronic Circuits test macro, it is made up of accurate DA change-over circuit (1), Bootstrap dedicated control circuit (2), current control circuit (3), precision current metering circuit (4) and high-voltage measuring circuit (5); It is characterized in that described accurate DA change-over circuit (1) connects Bootstrap dedicated control circuit (2) and current control circuit (3) respectively; Described Bootstrap dedicated control circuit (2) a tunnel connects another road output of high-voltage measuring circuit (5); Described current control circuit (3) a tunnel connects another road output of precision current metering circuit (4); Described current control circuit (3) connects Bootstrap dedicated control circuit (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201157721U CN202119878U (en) | 2011-04-19 | 2011-04-19 | High voltage test power supply special circuit for simulating integrated circuit test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201157721U CN202119878U (en) | 2011-04-19 | 2011-04-19 | High voltage test power supply special circuit for simulating integrated circuit test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202119878U true CN202119878U (en) | 2012-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201157721U Expired - Fee Related CN202119878U (en) | 2011-04-19 | 2011-04-19 | High voltage test power supply special circuit for simulating integrated circuit test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202119878U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048600A (en) * | 2012-12-05 | 2013-04-17 | 电子科技大学 | Reverse breakdown voltage test system for semiconductor apparatus |
| CN105162322A (en) * | 2015-05-29 | 2015-12-16 | 杭州长川科技股份有限公司 | High-voltage test power supply |
| CN105652943A (en) * | 2016-03-16 | 2016-06-08 | 深圳市华宇半导体有限公司 | High-voltage power supply control circuit |
-
2011
- 2011-04-19 CN CN2011201157721U patent/CN202119878U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048600A (en) * | 2012-12-05 | 2013-04-17 | 电子科技大学 | Reverse breakdown voltage test system for semiconductor apparatus |
| CN103048600B (en) * | 2012-12-05 | 2014-12-24 | 电子科技大学 | Reverse breakdown voltage test system for semiconductor apparatus |
| CN105162322A (en) * | 2015-05-29 | 2015-12-16 | 杭州长川科技股份有限公司 | High-voltage test power supply |
| CN105652943A (en) * | 2016-03-16 | 2016-06-08 | 深圳市华宇半导体有限公司 | High-voltage power supply control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhu Yujing Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Zhu Yujing Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20130419 |