CN103728571A - Power source detection circuit and method - Google Patents
Power source detection circuit and method Download PDFInfo
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- CN103728571A CN103728571A CN201210391340.2A CN201210391340A CN103728571A CN 103728571 A CN103728571 A CN 103728571A CN 201210391340 A CN201210391340 A CN 201210391340A CN 103728571 A CN103728571 A CN 103728571A
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Abstract
A power source detection circuit is used for detecting a power source to be detected and comprises a controller, a resistor and a field-effect transistor. The controller comprises a power module, a control module, a signal module and a detection module, wherein the power module is used for supplying an input voltage to an input end of the power source to be detected. One end of the resistor is connected with an output end of the power source to be detected, the other end of the resistor is connected with the field-effect transistor, and the field-effect transistor is connected with the signal module. The detection module is connected with the output end of the power source to be detected. The control module is used for controlling the signal module to generate a pulse signal. The field-effect transistor is conductive when the pulse signal is in high level so that the resistor and the power source to be detected are switched on to generate a rapidly-rising current. The detection module is used for detecting an output voltage of the output end of the power source to be detected. The invention further provides a power source detection method used for accurately detecting the response capacity of the power source when the current rises rapidly.
Description
Technical field
The present invention relates to a kind of circuit and method, refer to especially a kind of power sense circuit and method.
Background technology
Usually, before power supply shipment, need the properties of power supply to verify, particularly the capability of fast response of power supply when connecting load suddenly.Yet the current circuit for detection of power supply is when connecting load, current-rising-rate is fast not, can not verify very accurately the responding ability of power supply when electric current fast rise.
Summary of the invention
In view of above content, be necessary to provide a kind of power sense circuit and the method that can accurately verify the responding ability of power supply when electric current fast rise.
A kind of power sense circuit, in order to detect a power supply to be measured, include controller, described controller includes power supply module, described power supply module is in order to provide the input end of an input voltage to described power supply to be measured, described controller also includes control module, signal module and detection module, described power sense circuit also includes resistance and field effect transistor, one end of described resistance connects the output terminal of described power supply to be measured, the other end connects described field effect transistor, described field effect transistor connects described signal module, described detection module connects the output terminal of described power supply to be measured, described control module is controlled described signal module and is produced pulse signal, the conducting when described pulse signal is high level of described field effect transistor, to connect described resistance and described power supply to be measured, produce a fast rise electric current, described detection module detects the output voltage of the output terminal of described power supply to be measured.
In one embodiment, described resistance is cement resistor.
In one embodiment, described pulse signal comprises many group pulses signal, and the dutycycle of described every group pulse signal or frequency are different.
In one embodiment, the lasting time of every group pulse signal is 30 seconds.
In one embodiment, described signal module connects the grid of described field effect transistor, and the other end of described resistance connects the drain electrode of described field effect transistor.
A power supply detection method, in order to detect a power supply to be measured, comprises the following steps:
The power supply module of controller is exported an input voltage to the input end of described power supply to be measured;
The signal module that the control module of controller is controlled described controller produces the different pulse signal of many groups;
Field effect transistor conducting when every group pulse signal is high level, to connect described resistance and described power supply to be measured, produces a fast rise electric current;
Whether the output voltage of the output terminal of the described power supply to be measured of detection module detection of controller is qualified.
In one embodiment, described resistance is cement resistor.
In one embodiment, the dutycycle of every group pulse signal or frequency are different.
In one embodiment, the lasting time of every group pulse signal is 30 seconds.
In one embodiment, the signal module that control module is controlled described controller produces how the different pulse signal of group comprises whether the duration that judges every group pulse signal reaches 30 seconds, if, control module control signal module and produce lower set of pulses signal, if not, continue current pulse signal.
Compared with prior art, in above-mentioned power sense circuit and method, by controller, coordinate field effect transistor and resistance, produce fast rise and the different electric current of frequency, and by detecting module, detect the voltage of power output end to be measured.Like this, just can detect exactly power supply to be measured and at load circuit, produce responding ability and the stability of fast rise electric current.
Accompanying drawing explanation
Fig. 1 is the connection layout in a preferred embodiment of power sense circuit of the present invention.
Fig. 2 is the process flow diagram in a preferred embodiment of power supply detection method of the present invention.
Main element symbol description
| Power supply to be measured | 100 |
| | 101 |
| | 102 |
| | 10 |
| | 20 |
| | 30 |
| | 50 |
| | 200 |
| Mu balanced | 300 |
| | 500 |
| | 600 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Please refer to Fig. 1, in a better embodiment of the present invention, a power sense circuit is in order to test a power supply 100 to be measured.Described power sense circuit comprises a controller 200, a mu balanced circuit 300, at least one resistance 500 and at least one field effect transistor 600.
Described power supply to be measured 100 comprises an input end 101 and an output terminal 102.
Described controller 200 comprises that a power supply module 10, is controlled module 20, a signal module 30 and detects module 50.
Described power supply module 10 connects described mu balanced circuit 300, and by described mu balanced circuit 300, connects the input end 101 of described power supply 100 to be measured, in order to input a stable input voltage to described power supply 100 to be measured.
Described control module 20 connects described signal module 30, produces the pulse signal of some different duty or different frequency in order to control described signal module 30.The parameter of described pulse signal is the combination of two of each dutycycle and each frequency.In one embodiment, the dutycycle of described pulse signal is 25/75,50/50,75/25, and frequency is 1kHz, 10kHz, 100kHz and 1MHz.Like this, the parameter of described pulse signal is respectively dutycycle 25/75, frequency 1kHz; Dutycycle 25/75, frequency 10kHz; Dutycycle 25/75, frequency 100kHz; Dutycycle 25/75, frequency 1MHz; Dutycycle 50/50, frequency 1kHz; Dutycycle 50/50, frequency 10kHz; Dutycycle 50/50, frequency 100kHz; Dutycycle 50/50, frequency 1MHz; Dutycycle 75/25, frequency 1kHz; Dutycycle 75/25, frequency 10kHz; Dutycycle 75/25, frequency 100kHz; Dutycycle 75/25, frequency 1MHz.Every group pulse signal continues the regular hour.In one embodiment, the lasting time of every group pulse signal is 30 seconds.
Described field effect transistor 600 comprises a grid G, a drain D and one source pole S.
One end of described resistance 500 connects the output terminal 102 of described power supply 100 to be measured, and the other end connects described drain D.In one embodiment, described resistance 500 is cement resistor.Described resistance 500 can be formed in parallel by a plurality of cement resistors as required.
Described source S ground connection.
Described grid G connects described signal module 30, the pulse signal producing in order to receive described signal module 30.The conducting when described pulse signal is high level of described field effect transistor 600, when described pulse signal is low level by.When described field effect transistor 600 conducting, described power supply 100 to be measured is connected described resistance 500, forms a loop.In described loop, produce a zooming dynamic current.
The output terminal 102 of described power supply to be measured 100 connects described detection module 50, in order to an output voltage is fed back to described detection module 50.Whether 50 pairs of described output voltages of described detection module detect in real time, and export described output voltage to a display (not shown), in order to observe described output voltage, equate with input voltage.
Refer to Fig. 2, a kind of power supply detection method comprises the following steps:
S10: the input end 101 of power supply module 10 output one input voltage to power supply 100 to be measured of controller;
S20: the signal module 30 that the control module 20 of controller 200 is controlled described controller produces the different pulse signal of many groups;
S30: field effect transistor 600 conducting when every group pulse signal is high level, during the output terminal 102 being on the scene effect pipe conducting of described power supply 100 to be measured, connect resistance, produce a zooming electric current;
S40: whether the output voltage that the detection module 50 of controller 200 detects the output terminal 102 of described power supply 100 to be measured equates with input voltage.
The dutycycle of every group pulse signal or frequency are different.The duration of every group pulse signal is identical.In one embodiment, the duration of every group pulse signal is 30 seconds.Step S20 comprises controlling module 20 judge whether the duration of every group pulse signal reach 30 seconds, if so, controls module 20 control signal modules 30 and produces lower set of pulses signal, if not, and lasting current pulse signal.
Claims (10)
1. a power sense circuit, in order to detect a power supply to be measured, include controller, described controller includes power supply module, described power supply module is in order to provide the input end of an input voltage to described power supply to be measured, it is characterized in that: described controller also includes control module, signal module and detection module, described power sense circuit also includes resistance and field effect transistor, one end of described resistance connects the output terminal of described power supply to be measured, the other end connects described field effect transistor, described field effect transistor connects described signal module, described detection module connects the output terminal of described power supply to be measured, described control module is controlled described signal module and is produced pulse signal, the conducting when described pulse signal is high level of described field effect transistor, to connect described resistance and described power supply to be measured, produce a fast rise electric current, described detection module detects the output voltage of the output terminal of described power supply to be measured.
2. power sense circuit as claimed in claim 1, is characterized in that: described resistance is cement resistor.
3. power sense circuit as claimed in claim 1, is characterized in that: described pulse signal comprises many group pulses signal, and the dutycycle of every group pulse signal or frequency are different.
4. power sense circuit as claimed in claim 3, is characterized in that: the lasting time of every group pulse signal is 30 seconds.
5. power sense circuit as claimed in claim 1, is characterized in that: described signal module connects the grid of described field effect transistor, and the other end of described resistance connects the drain electrode of described field effect transistor.
6. a power supply detection method, in order to detect a power supply to be measured, comprises the following steps:
The power supply module of controller is exported an input voltage to the input end of described power supply to be measured;
The signal module that the control module of controller is controlled described controller produces the different pulse signal of many groups;
Field effect transistor conducting when every group pulse signal is high level, to connect described resistance and described power supply to be measured, produces a fast rise electric current;
Whether the output voltage that the detection module of controller detects the output terminal of described power supply to be measured equals input voltage.
7. power supply detection method as claimed in claim 6, is characterized in that: described resistance is cement resistor.
8. power supply detection method as claimed in claim 6, is characterized in that: the dutycycle of every group pulse signal or frequency are different.
9. power supply detection method as claimed in claim 6, is characterized in that: the lasting time of every group pulse signal is 30 seconds.
10. power supply detection method as claimed in claim 6, it is characterized in that: the signal module that control module is controlled described controller produces how the different pulse signal of group comprises whether the duration that judges every group pulse signal reaches 30 seconds, if, control module control signal module and produce lower set of pulses signal, if not, continue current pulse signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210391340.2A CN103728571A (en) | 2012-10-16 | 2012-10-16 | Power source detection circuit and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210391340.2A CN103728571A (en) | 2012-10-16 | 2012-10-16 | Power source detection circuit and method |
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|---|---|
| CN103728571A true CN103728571A (en) | 2014-04-16 |
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| CN201210391340.2A Pending CN103728571A (en) | 2012-10-16 | 2012-10-16 | Power source detection circuit and method |
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|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019171A (en) * | 2016-05-19 | 2016-10-12 | 大族激光科技产业集团股份有限公司 | Debugging device for multichannel large-power-output power supply |
| CN106501737A (en) * | 2016-10-11 | 2017-03-15 | 深圳Tcl数字技术有限公司 | Switching Power Supply test device |
| CN116840734A (en) * | 2023-07-07 | 2023-10-03 | 西安航空学院 | Digital pulse parameter detection system and method |
| WO2024055141A1 (en) * | 2022-09-13 | 2024-03-21 | Innoscience (suzhou) Semiconductor Co., Ltd. | Semiconductor testing device and method of operating semiconductor testing device |
-
2012
- 2012-10-16 CN CN201210391340.2A patent/CN103728571A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106019171A (en) * | 2016-05-19 | 2016-10-12 | 大族激光科技产业集团股份有限公司 | Debugging device for multichannel large-power-output power supply |
| CN106501737A (en) * | 2016-10-11 | 2017-03-15 | 深圳Tcl数字技术有限公司 | Switching Power Supply test device |
| CN106501737B (en) * | 2016-10-11 | 2020-01-14 | 深圳Tcl数字技术有限公司 | Switching power supply testing device |
| WO2024055141A1 (en) * | 2022-09-13 | 2024-03-21 | Innoscience (suzhou) Semiconductor Co., Ltd. | Semiconductor testing device and method of operating semiconductor testing device |
| CN116840734A (en) * | 2023-07-07 | 2023-10-03 | 西安航空学院 | Digital pulse parameter detection system and method |
| CN116840734B (en) * | 2023-07-07 | 2024-04-05 | 西安航空学院 | Digital pulse parameter detection system and method |
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Application publication date: 20140416 |