CN107976641A - A kind of method tested verification Switching Power Supply multiphase and flowed - Google Patents
A kind of method tested verification Switching Power Supply multiphase and flowed Download PDFInfo
- Publication number
- CN107976641A CN107976641A CN201711136719.8A CN201711136719A CN107976641A CN 107976641 A CN107976641 A CN 107976641A CN 201711136719 A CN201711136719 A CN 201711136719A CN 107976641 A CN107976641 A CN 107976641A
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- China
- Prior art keywords
- circuit
- temperature
- multiphase
- flows
- triode
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- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
Abstract
The present invention is suitable for field of switch power, more particularly to a kind of to test method and the circuit that Switching Power Supply multiphase flows.The present invention be by the use of triode as each inductance of temperature sensor measurement around temperature rise, come verify whether realize flow.Higher with temperature measurement accuracy, response is fast, it is small and cheap the advantages of.
Description
Technical field
It is more particularly to a kind of to test method and the electricity that verification Switching Power Supply multiphase flows the present invention relates to field of switch power
Road.
Background technology
Has there are many years in current balance technology, and has developed input impedance method, Zhu Congfa, by size of current
Automatic current equalizing method, by a variety of current equalizing methods such as thermal stress automatic current equalizing method, additional equalizing controller methods.It is as shown in Figure 1 to include
The Switching Power Supply of multiphase, realizes that current balance is the key for realizing high power system between multiphase.Stream can ensure mould
Current stress and thermal stress evenly distribute between block, and to prevent a certain phase (Voltage Regulator, voltage regulator are real in VR
The conversion of existing DC voltage) after control opens, occur overloading or the situation of underloading (or even unloaded).So it is bound to cause and shares
Module thermal stress more than electric current is greatly so as to influence the reliability of power-supply system really.Therefore, test verification power-supply system is really real
Now stream just becomes extremely important.
The verification current equalizing method used at present is defeated by DMM (Digital Multimeter, digital multimeter) measurements
Go out the voltage at inductance both ends, record and more each magnitude of voltage, to judge whether flowed between multiphase.Can so do, be because
The DCR (Direct Current Resistor) brought for the conducting wire of inductance, pin, copper wire impedance, meeting when electric current flows through inductance
Produce pressure drop.In this current method, if the pressure drop at each inductance both ends is consistent, illustrate to realize between each phase
Stream.Induction equivalent circuit and measuring method schematic diagram are as shown in Figure 2.DCR is " harmful " parameter in itself for inductance.With
The increase of load current in inductance coil, temperature rise is also more obvious caused by DCR, the energy conversion efficiency of whole power-supply system
Also will be affected.So inductance manufacturer is all the value for trying to reduce DCR.The DCR of present inductance has been decreased to several milliohms.Institute
To measure the pressure drop at inductance both ends to determine whether the method flowed using DCR, it will be difficult to go to realize again and error also can
Become very big.
The content of the invention
The present invention proposes a kind of method tested verification Switching Power Supply multiphase and flowed, and is to be used as temperature sensing by the use of triode
Device measures the temperature rise around each inductance, is flowed to verify whether to realize.Due to the junction voltage U of triodeBEWith temperature (<200
DEG C) there is good linear relationship, measurement accuracy can also obtain certain guarantee.
The present invention is achieved through the following technical solutions, and a kind of circuit tested verification multiphase and flowed, includes temperature
Sensor, for detecting the temperature of each phase inductance, the temperature sensor includes triode, and the temperature sensor can be independent
Form a board.The temperature sensor further comprises EMI protection circuit.The temperature sensor includes display screen.It is described
Circuit further comprises digital multimeter.The present invention also provides a kind of method tested using aforementioned circuit and verify that multiphase flows, bag
Include following steps：Load for 0 when, measure the temperature and record of each phase inductance；After fully loaded a period of time, the temperature is measured again
And record, draw the variable quantity of temperature twice, if each phase temperature variation is consistent, judgement realizes multiphase and flows, conversely,
It is not implemented and flows.
Further, measurement temperature is specially the junction voltage U for the triode for measuring each phaseBE。
The present invention is to measure inductance temperature by the use of triode as temperature sensor relative to the beneficial effect of the prior art
Rise method, in principle with equal flow verification is all easily realized on circuit.First triode junction voltage and temperature it
Between there are a negative temperature coefficient, wherein temperature coefficient is -2.5mV/ DEG C, and has good line in certain temperature range
The relation of sexual intercourse so that voltage --- temperature becomes very simple on mathematical logic.Secondly, triode circuit design letter
It is single, base stage --- after collector short circuit, you can form basic circuit.So institute's extracting method of the present invention is almost not added with any cost
Complete the accurate validation flowed.There is the advantages of temperature measurement accuracy is higher, and response is fast, small and cheap.
Brief description of the drawings
Fig. 1 includes the voltage system block diagram of multiphase in the prior art
Fig. 2 detects the circuit diagram that multiphase flows in the prior art
The block diagram that the test verification Switching Power Supply multiphase that Fig. 3 one embodiment of the invention provides flows
Triode temperature sensor schematic diagram in Fig. 4 one embodiment of the invention
The triode temperature sensor schematic diagram that Fig. 5 another embodiment of the present invention provides
Embodiment
Presently preferred embodiments of the present invention is described in detail below in conjunction with the accompanying drawings.Following embodiments are only used for clearer
Ground illustrates technical scheme, and is not intended to limit the protection scope of the present invention and limits the scope of the invention.
The multiphase of Switching Power Supply stream is the key for realizing power-supply system high reliability, can prepare the realization that verification is flowed
Also it is extremely important.It is proposed by the present invention to verify the method flowed, it is involved in triode and its temperature characterisitic.
Many kinds temperature sensor at present, regards temperature sensor with triode, is the property that make use of semi-conducting material
The characteristics of being easily affected by temperature, the change of temperature will influence the junction voltage U of triodeBEValue.Utilize triode emission
Pole --- base stage PN junction temperature characterisitic realizes temperature --- conversion of voltage.
Embodiment one
As shown in figure 3, in the embodiment of the present invention, by the CPU_VCCIN on server master board, this is illustrated exemplified by organizing electricity,
CPU_VCCIN has the output of six phases, TDC 115A, Imax 228A.It is specific as follows.
In the PCB layout stages, triode is put close to outputting inductance, makes its one-to-one corresponding, to avoid closing on inductance
The influence radiated to adjacent triode, it is proposed that triode is placed in the rear end of every inductance.Passed by the use of triode as temperature
Sensor, by measuring inductance temperature rise to determine whether the method flowed, all very convenient and several from principle and actual track
Do not increase cost realizes accurate equal flow verification.
Because on server master board, arrangement space is at full stretch, here if simple designs to test verification
If complicated circuit, it will other prior circuits are caused to extrude, influence the performance of All other routes.So here will
Triode circuit designs very simple, as shown in Figure 4.By the base stage of triode and collector short circuit, if NPN type, then E
Level ground connection, B-C meet VCC；If positive-negative-positive, E grades connect VCC, B-C ground connection.Herein it should be noted that, although base stage, current collection
It is extremely short connect after equivalent to one diode, but this sample loading mode is stronger than the through-current capability of diode, and conduction voltage drop is namely
Junction voltage UBEIt is still 0.7V or so.
Further, whether can be flowed between multiphase by way of DMM measures junction voltage to verify.Need what is illustrated
It is, here can only be by measuring the changes delta U of junction voltage because each component cannot accomplish striking resemblancesBETo test
Whether the temperature rise for demonstrate,proving every outputting inductance is consistent.Specifically, test verification process be load for 0 when, measure each triode
Junction voltage UBE1*And record.After output terminal is fully loaded with a period of time, each triode junction voltage U is measured againBE2*And record, draw
ΔUBE *.If Δ UBE *Unanimously, then illustrating that inductance temperature rise caused by DCR is consistent, the electric current that also just explanation multiphase passes through is consistent,
Power-supply system, which is also achieved that, to flow.If the Δ U measuredBE *Inconsistent, then explanation is not implemented and flows, and at this time just needs electricity
Source engineer goes analysis reason and makes debugging.
In embodiment, it is to verify whether inductance temperature rise is consistent by measuring the change of junction voltage, so that further
Judge whether what is flowed, so there are some requirements for the type selecting of triode at this, because type selecting will influence the value of junction voltage：
Under highest environment temperature, junction voltage should ensure that more than 0.25V, and under minimum environment temperature, junction voltage, which should ensure that, to be less than
0.95V；Base resistance should be less than 100 Ω.Such as triode 2N3904,2N3906 are suitable.
Embodiment two
The method flowed is verified described in embodiment one, it is understood that there may be some shortcomings.Such as reserved in the design of EVT stages circuit
The space of placement triode, needs to delete to save space on plate in DVT, PVT stage afterwards.
In the present embodiment, triode temperature sensor is individually made into a board.Triode is exposed on board, quite
In the probe of temperature sensor, can be contacted with inductance.If make single board, then the periphery circuit of triode
It can be made complicated.For example the electromagnetic interference to triode that EMI protection circuit brings to prevent inductance can be increased, certainly
ADC module can be added along with liquid crystal display makes its voltage signal become readable temperature signal.
For example, just there is sufficient space to remove design periphery circuit on independent test verification board.It is illustrated in figure 5 triode
Filter circuit, filter circuit includes two 100 ohm of resistance, and the capacitance of 1nF, triode can be helped to avoid high frequency
Noise jamming, obtains more stable and accurate junction voltage so that stream judges more accurate.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (8)
- A kind of 1. circuit tested verification multiphase and flowed, it is characterised in that：Include temperature sensor, for detecting each phase electricity The temperature of sense.
- 2. the circuit that test verification multiphase according to claim 1 flows, it is characterised in that：The temperature sensor includes Triode.
- 3. the circuit that test verification multiphase according to claim 1 flows, it is characterised in that：The temperature sensor is independent Form a board.
- 4. the circuit that test verification multiphase according to claim 1 flows, it is characterised in that：The temperature sensor also wraps EMI protection circuit is included.
- 5. the circuit that test verification multiphase according to claim 1 flows, it is characterised in that：The temperature sensor includes Display screen.
- 6. the circuit that test verification multiphase according to claim 1 flows, it is characterised in that：The circuit further comprises number Word universal meter.
- A kind of 7. method flowed using any one of claim 1-6 circuit test verification multiphase, it is characterised in that：Including following Step：Load for 0 when, measure the temperature and record of each phase inductance；After fully loaded a period of time, the temperature is measured again and is remembered Record, draws the variable quantity of temperature twice, if each phase temperature variation is consistent, judgement realizes multiphase and flows, conversely, unreal Now flow.
- 8. the method that test verification multiphase according to claim 7 flows, it is characterised in that：Measurement temperature is specially to measure The junction voltage U of the triode of each phaseBE。
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| CN201711136719.8A CN107976641A (en) | 2017-11-16 | 2017-11-16 | A kind of method tested verification Switching Power Supply multiphase and flowed |
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| CN201711136719.8A CN107976641A (en) | 2017-11-16 | 2017-11-16 | A kind of method tested verification Switching Power Supply multiphase and flowed |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109460138A (en) * | 2018-11-06 | 2019-03-12 | 郑州云海信息技术有限公司 | A kind of multiphase power supply method of adjustment and device |
| CN110967549A (en) * | 2018-12-04 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Current sampling method and current sampling circuit |
| EP4067913A1 (en) * | 2021-03-26 | 2022-10-05 | Airbus SAS | Apparatus and method for detection current imbalance |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109460138A (en) * | 2018-11-06 | 2019-03-12 | 郑州云海信息技术有限公司 | A kind of multiphase power supply method of adjustment and device |
| CN110967549A (en) * | 2018-12-04 | 2020-04-07 | 宁德时代新能源科技股份有限公司 | Current sampling method and current sampling circuit |
| US11287454B2 (en) | 2018-12-04 | 2022-03-29 | Contemporary Amperex Technology Co., Limited | Current sampling method and current sampling circuit |
| EP4067913A1 (en) * | 2021-03-26 | 2022-10-05 | Airbus SAS | Apparatus and method for detection current imbalance |
| US11788899B2 (en) | 2021-03-26 | 2023-10-17 | Airbus (Sas) | Apparatus and method for detection current imbalance |
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