CN207051884U - A kind of USB interface power supply consumption detection and protection system - Google Patents
A kind of USB interface power supply consumption detection and protection system Download PDFInfo
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- CN207051884U CN207051884U CN201721031961.4U CN201721031961U CN207051884U CN 207051884 U CN207051884 U CN 207051884U CN 201721031961 U CN201721031961 U CN 201721031961U CN 207051884 U CN207051884 U CN 207051884U
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- 238000012544 monitoring process Methods 0.000 description 2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The utility model provides a kind of USB interface power supply consumption detection and is connected with switching tube, detection resistance and USB interface with protection system, including microcontroller, microcontroller；USB interface includes power end, earth terminal, the first data terminal and the second data terminal；Switching tube includes power positive end, power supply negative terminal and switch terminals；The switch terminals of switching tube are connected with microcontroller, the power positive end of switching tube is connected with 5V power supplies inside USB, the power supply negative terminal of switching tube is connected with detection resistance, the other end of detection resistance and the power end of USB interface connect, the power supply negative terminal of switching tube is also associated with voltage detecting one end, and the power end of USB interface is also associated with the end of voltage detecting two；Voltage detecting one end, the end of voltage detecting two, the second data terminal of the first data terminal of USB interface and USB interface are connected with microcontroller, the earth terminal ground connection of USB interface.
Description
Technical field
The utility model belongs to USB storages and power supply field, and in particular to a kind of USB interface power supply consumption detection and protection
System.
Background technology
As USB interface is widely used, turn into the requisite interfaces of all mobile or hand-held devices, be by USB interface
Mobile or hand-held device is powered, also as necessary function.Currently widely use the numerals such as computer, server, storage array
Equipment, USB peripheral can be all supported substantially, it by USB interface is other powering portable devices that can also utilize the power supply of itself
Or charging.In to peripheral hardware power supply and charging process, the power of USB interface output is monitored in real time, can not only be understood in real time each
Individual peripheral hardware power consumption condition, preferably adjusts charging current, and itself circuit and peripheral hardware can also be accomplished to protect, prevent unexpected hair
It is raw.
USB interface power supply circuit at present, substantially only simple low pressure detecting and defencive function, by detecting USB interface
5V supply voltages, after voltage is less than certain value, system can send warning information or force output cut-out so as to accomplish to protect
Protective function.Such a mode, simple low pressure detecting can only be carried out, precision is low, and is unable to monitor current and power.
This is the deficiencies in the prior art, therefore, for drawbacks described above of the prior art, there is provided a kind of USB interface power supply
Consumption detection and protection system, are necessary.
The content of the invention
The purpose of this utility model is, for above-mentioned existing USB interface power supply circuit only have simple low pressure detecting and
The defects of defencive function, there is provided a kind of USB interface power supply consumption detection and protection system, to solve above-mentioned technical problem.
To achieve the above object, the utility model provides following technical scheme：
A kind of USB interface power supply consumption detection and protection system, including microcontroller, microcontroller be connected with switching tube,
Detection resistance and USB interface；
USB interface includes power end, earth terminal, the first data terminal and the second data terminal；
Switching tube includes power positive end, power supply negative terminal and switch terminals；
The switch terminals of switching tube are connected with microcontroller, and the power positive end of switching tube is connected with 5V power supplies inside USB,
The power supply negative terminal of switching tube is connected with detection resistance, and the other end of detection resistance and the power end of USB interface connect, switching tube
Power supply negative terminal is also associated with voltage detecting one end, and the power end of USB interface is also associated with the end of voltage detecting two；
Voltage detecting one end, the end of voltage detecting two, the second data terminal of the first data terminal of USB interface and USB interface are equal
It is connected with microcontroller, the earth terminal ground connection of USB interface；
The detection voltage that microcontroller is inputted by voltage detecting one end and the end of voltage detecting two, calculate output current and
The power consumption of detection resistance, if microcontroller judges voltage, electric current and power consumption under normal circumstances, 5V power supplies carry inside USB
For the power supply of USB interface, by the switching tube of opening, detection resistance is flowed to, is finally exported by USB interface；If microcontroller
Judge that over-pressed, under-voltage, excessively stream or super power consumption occurs in USB interface, then microcontroller sends signal-off switching tube, USB interface
There is no voltage output；If microcontroller judges USB interface, voltage is normal, and electric current is normal, and power consumption exceedes limit value and continues the designated time,
Signal-off switching tube is then sent, remains off setting time section.
Further, microcontroller is connected with including usb data receiving module, voltage detection module, voltage detection module
Power consumption calculation module, power consumption calculation module are connected with relay protective scheme module, and relay protective scheme module is connected with switch control module；
First data terminal of USB interface and the second data terminal of USB interface are connected with usb data receiving module；
Voltage detecting one end and the end of voltage detecting two are connected with voltage detection module；
The switch terminals of switching tube are connected with switch control module；
Usb data receiving module receives and sent data from the first data terminal of USB interface and the second data terminal；Voltage is examined
Survey module and obtain the voltage at detection resistance both ends from voltage detecting one end and the end of voltage detecting two, and magnitude of voltage is converted into numeral
Amount, is sent to power consumption calculation module, power consumption calculation module calculates the output work of the current value and USB interface that flow through detection resistance
Consumption, if the terminal voltage of voltage detecting one is Vin1, the terminal voltage of voltage detecting two is Vin2, and detection resistance resistance is R, flows through detection electricity
The current value of resistance be Ir=（Vin1-Vin2）/ R, and the power that the USB interface externally exports be Pout=Vin2*Ir=
Vin2*（Vin1-Vin2）The value of collection and the value calculated are sent to relay protective scheme module by/R, power consumption calculation module；Protection
Logic module judges whether USB interface under-voltage, over-pressed, excessively stream and super power consumption occurs, if occurring, sends closing switch pipe letter
Number give switch control module, the opening and closing of switch control module controlling switch pipe；Relay protective scheme module judges USB interface electricity
Positive pressure is normal, and when electric current is normal, power consumption exceedes limit value and continues the designated time, then sends signal-off switching tube, remain off
Setting time section.
Further, voltage detection module includes data processing unit, and data processing unit is connected with AD conversion unit,
AD conversion unit is connected with sampling time interval setup unit；Voltage detecting one end and the end of voltage detecting two are and analog-to-digital conversion
Unit connects；
Sampling time interval setup unit sets sampling time interval；Sampling time interval of the AD conversion unit to set
Sampled, and the voltage analog that voltage detecting one end and the end of voltage detecting two are inputted be converted to data signal to data at
Manage unit；The magnitude of voltage that data processing unit collects to AD conversion unit carries out stabilization processing, and stabilization processing is one
Secondary three values of continuous sampling, if occur a value in three values is more than given threshold with another two difference, then it is assumed that analog-to-digital conversion
Unit collection voltages occur abnormal, send a signal to AD conversion unit and resurvey voltage, mutual difference between three values
If respectively less than given threshold, three values are averaged, average result is supplied to power consumption calculation module.
Further, relay protective scheme module includes data comparing unit, and data comparing unit is connected with threshold value storage unit
And logic judgment unit；Data comparing unit is also connected with power consumption calculation module, logic judgment unit also with switch control module
Connection；
Threshold value storage unit be stored with upper voltage limit value Vh, voltage lower limit value Vl, current upper limit value Ilmt, in power output
Limit value Plmt, the first protection power consumption Plmt1, the second protection power consumption Plmt2, the first duration section T1, the second duration section
T2 and turn-off time section T3, wherein, Plmt1 is less than Plmt2, and Plmt2 is less than Plmt, and T1 is more than T2；
Data comparing unit obtains the magnitude of voltage Vin1 and the end of voltage detecting two of voltage detecting one end from power consumption calculation module
Magnitude of voltage Vin2, flow through the current value Ir of detection resistance, the output power consumption Pout of USB interface, data comparing unit compares
Vin1 and Vh, Vin2 and Vl, Ir and Ilmt and Pout and Plmt1, Plmt2 and Plmt size；
If data comparing unit judges that Vin1 is less than Vh while Vin2 is more than Vl, logic judgment unit judges voltage output
Normally, if Vin1 is more than Vh, logic judgment unit judges that output voltage is too high, if Vin2 is less than Vl, logic judgment unit
Judge that output voltage is too low, if Ir is more than Ilmt, logic judgment unit judges that output current is excessive, if Pout is more than Plmt,
Then logic judgment unit judges that output power consumption is excessive；Output voltage is too high, output voltage is too low, output current is excessive and output
When power consumption is excessive, logic judgment unit sends control signal and gives switch control module closing switch pipe；
If logic judgment unit judges that output voltage is normal, when output current is normal, Pout is more than the Plmt1 duration
Section T1, or, Pout is more than Plmt2 duration section T2, then logic judgment unit sends control signal to switch control module
Closing switch pipe duration section T3, then reopens switching tube.
Further, switching tube uses N-channel MOS pipe, and the power positive end of switching tube is the drain electrode of N-channel MOS pipe, switch
The power supply negative terminal of pipe is the source class of N-channel MOS pipe, and the switch terminals of switching tube are the grid of N-channel MOS pipe.
The beneficial effects of the utility model are：
The utility model not only realizes monitoring to output voltage and electric current by detecting resistance, also realizes to power output
Monitoring, while also realize the protection to power supply circuit and USB peripheral.
In addition, the utility model design principle is reliable, and it is simple in construction, there is very extensive application prospect.
As can be seen here, the utility model compared with prior art, has substantive distinguishing features and progress, its beneficial effect implemented
Fruit is also obvious.
Brief description of the drawings
Fig. 1 is system connection signal Fig. 1 of the present utility model；
Fig. 2 is system connection signal Fig. 2 of the present utility model；
Fig. 3 is the structural representation of microcontroller；
Wherein, 1- microcontrollers；1.1-USB data reception module；1.2- power detecting modules；1.2.1- data processing list
Member；1.2.2- sampling time interval setup unit；1.2.3- AD conversion unit；1.3- power consumption calculation modules；1.4- protections are patrolled
Collect module；1.4.1- threshold value storage unit；1.4.2- data comparing unit；1.4.3- logic judgment unit；1.5- switch controls
Module；2- switching tubes；The power positive end of 2.1- switching tubes；The power supply negative terminal of 2.2- switching tubes；The switch terminals of 2.3- switching tubes；3-
Detection resistance；3.1- voltage detectings one end；The end of 3.2- voltage detectings two；4- USB interfaces；The power end of 4.1-USB interfaces；
The earth terminal of 4.2-USB interfaces；First data terminal of 4.3-USB interfaces；Second data terminal of 4.4-USB interfaces；Inside 5-USB
5V power supplies.
Embodiment：
It is specific below in conjunction with this to enable the purpose of this utility model, feature, advantage more obvious and understandable
Accompanying drawing in embodiment, the technical scheme in the utility model is clearly and completely described.
As shown in figure 1, the utility model provides a kind of USB interface power supply consumption detection and protection system, including microcontroller
Device 1, microcontroller 1 are connected with switching tube 2, detection resistance 3 and USB interface 4；
USB interface 4 includes power end 4.1, earth terminal 4.2, the first data terminal 4.3 and the second data terminal 4.4；
Switching tube 2 includes power positive end 2.1, power supply negative terminal 2.2 and switch terminals 2.3；
The switch terminals 2.3 of switching tube are connected with microcontroller 1, and the power positive end 2.1 of switching tube is connected with 5V inside USB and supplied
Power supply 5, the power supply negative terminal 2.2 of switching tube are connected with detection resistance 3, the other end of detection resistance 3 and the power end of USB interface
4.1 connections, the power supply negative terminal 2.2 of switching tube are also associated with voltage detecting one end 3.1, and the power end 4.1 of USB interface is also associated with
The end 3.2 of voltage detecting two；
Voltage detecting one end 3.1, the end 3.2 of voltage detecting two, the second of the first data terminal 4.3 of USB interface and USB interface
Data terminal 4.4 is connected with microcontroller 1, and the earth terminal 4.2 of USB interface is grounded.
The detection voltage that microcontroller 1 is inputted by voltage detecting one end 3.1 and the end 3.2 of voltage detecting two, is calculated defeated
Go out the power consumption of electric current and detection resistance, if microcontroller 1 judges voltage, electric current and power consumption under normal circumstances, 5V is supplied inside USB
Power supply 5 provides the power supply of USB interface 4, the switching tube 2 by opening, flows to detection resistance 3, finally defeated by USB interface 4
Go out；If microcontroller 1 judges that over-pressed, under-voltage, excessively stream or super power consumption occurs in USB interface 4, microcontroller 1 sends signal and closed
Switching tube 2 is closed, USB interface 4 does not have voltage output；If microcontroller 1 judges USB interface 4, voltage is normal, and electric current is normal, power consumption
Continue the designated time more than limit value, then send signal-off switching tube 2, remain off setting time section.
As shown in Fig. 2 microcontroller 1 includes usb data receiving module 1.1, voltage detection module 1.2, voltage detecting mould
Block 1.2 is connected with power consumption calculation module 1.3, and power consumption calculation module 1.3 is connected with relay protective scheme module 1.4, relay protective scheme module
1.4 are connected with switch control module 1.5；
First data terminal 4.3 of USB interface and the second data terminal 4.4 of USB interface with usb data receiving module 1.1
Connection；
Voltage detecting one end 3.1 and the end 3.2 of voltage detecting two are connected with voltage detection module 1.2；
The switch terminals 2.3 of switching tube are connected with switch control module 1.5；Switching tube 2 uses N-channel MOS pipe, switching tube
Power positive end 2.1 is the drain electrode of N-channel MOS pipe, and the power supply negative terminal 2.2 of switching tube is the source class of N-channel MOS pipe, switching tube
Switch terminals 2.3 are the grid of N-channel MOS pipe；
Usb data receiving module 1.1 receives and sent number from the first data terminal 4.3 of USB interface and the second data terminal 3.4
According to；Voltage detection module 1.2 obtains the voltage at the both ends of detection resistance 3 from voltage detecting one end 3.1 and the end 3.2 of voltage detecting two,
And magnitude of voltage is converted into digital quantity, power consumption calculation module 1.3 is sent to, power consumption calculation module 1.3, which calculates, flows through detection electricity
The current value of resistance 3 and the output power consumption of USB interface 4, if the voltage of voltage detecting one end 3.1 is Vin1, the electricity of two end of voltage detecting 3.2
It is R to press as Vin2, the resistance of detection resistance 3, flow through the current value of detection resistance 3 for Ir=（Vin1-Vin2）/ R, and the USB interface
4 powers externally exported are Pout=Vin2*Ir=Vin2*（Vin1-Vin2）/ R, power consumption calculation module 1.3 is by collection
The value for being worth and calculating is sent to relay protective scheme module 1.4；Relay protective scheme module 1.4 judge USB interface 4 whether occur it is under-voltage,
Overvoltage, excessively stream and super power consumption, if occurring, closing switch pipe signal is sent to switch control module 1.5, switch control module
The opening and closing of 1.5 controlling switch pipes 2；Relay protective scheme module 1.4 judges that the voltage of USB interface 4 is normal, when electric current is normal, work(
Consumption exceedes limit value and continues the designated time, then sends signal-off switching tube 2, remain off setting time section.
As shown in figure 3, voltage detection module 1.2 includes data processing unit 1.2.1, data processing unit 1.2.1 connections
There are AD conversion unit 1.2.3, AD conversion unit 1.2.3 to be connected with sampling time interval setup unit 1.2.2；Voltage detecting
One end 3.1 and the end 3.2 of voltage detecting two are connected with AD conversion unit 1.2.3.
Sampling time interval setup unit 1.2.2 sets sampling time interval；AD conversion unit 1.2.3 is adopted with what is set
Sample time interval is sampled, and the voltage analog that voltage detecting one end 3.1 and the end 3.2 of voltage detecting two are inputted is converted to
Data signal gives data processing unit 1.2.1；The voltage that data processing unit 1.2.1 collects to AD conversion unit 1.2.3
Value carries out stabilization processing, and stabilization processing samples three values for one-time continuous, if occurring a value and another two in three values
Difference is more than given threshold, then it is assumed that exception occur in AD conversion unit 1.2.3 collection voltages, send a signal to analog-to-digital conversion list
First 1.2.3 resurveys voltage, if three values are averaged by difference respectively less than given threshold mutual between three values,
Average result is supplied to power consumption calculation module 1.3；
Relay protective scheme module 1.4 includes data comparing unit 1.4.2, and data comparing unit 1.4.2 is connected with threshold value storage
Unit 1.4.1 and logic judgment unit 1.4.3；Data comparing unit 1.4.2 is also connected with power consumption calculation module 1.3, and logic is sentenced
Disconnected unit 1.4.3 is also connected with switch control module 1.5.
Threshold value storage unit 1.4.1 is stored with upper voltage limit value Vh, voltage lower limit value Vl, current upper limit value Ilmt, output
Upper limit of the power value Plmt, the first protection power consumption Plmt1, the second protection power consumption Plmt2, the first duration section T1, second continue
Period T2 and turn-off time section T3, wherein, Plmt1 is less than Plmt2, and Plmt2 is less than Plmt, and T1 is more than T2；
Data comparing unit 1.4.2 obtains the magnitude of voltage Vin1 and electricity of voltage detecting one end 3.1 from power consumption calculation module 1.3
The magnitude of voltage Vin2 at two ends 3.2 of pressure detection, flow through the current value Ir of detection resistance 3, the output power consumption Pout of USB interface 4, data
Comparing unit 1.4.2 compares Vin1 and Vh, Vin2 and Vl, Ir and Ilmt and Pout and Plmt1, Plmt2 and Plmt size；
If data comparing unit 1.4.2 judges that Vin1 is less than Vh while Vin2 is more than Vl, logic judgment unit 1.4.3 sentences
It is normal to determine voltage output, if Vin1 is more than Vh, logic judgment unit 1.4.3 judges that output voltage is too high, if Vin2 is less than Vl,
Then logic judgment unit 1.4.3 judges that output voltage is too low, if Ir is more than Ilmt, logic judgment unit 1.4.3 judges output
Electric current is excessive, if Pout is more than Plmt, logic judgment unit 1.4.3 judges that output power consumption is excessive；Output voltage is too high, output
Brownout, output current it is excessive and output power consumption it is excessive when, logic judgment unit 1.4.3 send control signal give switch control
The closing switch pipe 2 of molding block 1.5；
If logic judgment unit 1.4.3 judges that output voltage is normal, when output current is normal, Pout continues more than Plmt1
Period T1, or, Pout is more than Plmt2 duration section T2, then logic judgment unit 1.4.3 sends control signal to switch
Control module 2 duration of 1.5 closing switch pipe section T3, then reopens switching tube 2.
The utility model is supported external suitable for the information technoloy equipment such as computer, handheld mobile device and storage, server
USB peripheral and need for external USB equipment power supply product.
Embodiment of the present utility model is illustrative and not restrictive, and above-described embodiment is only to aid in understanding this reality
With new, therefore the utility model is not limited to the embodiment described in embodiment, every by those skilled in the art's root
The other embodiments drawn according to the technical solution of the utility model, also belong to the scope of the utility model protection.
Claims (5)
1. a kind of USB interface power supply consumption detection and protection system, it is characterised in that including microcontroller, microcontroller connection
There are switching tube, detection resistance and USB interface；
USB interface includes power end, earth terminal, the first data terminal and the second data terminal；
Switching tube includes power positive end, power supply negative terminal and switch terminals；
The switch terminals of switching tube are connected with microcontroller, and the power positive end of switching tube is connected with 5V power supplies inside USB, switch
The power supply negative terminal of pipe is connected with detection resistance, and the other end of detection resistance and the power end of USB interface connect, the power supply of switching tube
Negative terminal is also associated with voltage detecting one end, and the power end of USB interface is also associated with the end of voltage detecting two；
Voltage detecting one end, the end of voltage detecting two, the first data terminal of USB interface and USB interface the second data terminal with it is micro-
Controller connects, the earth terminal ground connection of USB interface.
2. a kind of USB interface power supply consumption detection as claimed in claim 1 and protection system, it is characterised in that microcontroller
Power consumption calculation module, power consumption calculation module are connected with including usb data receiving module, voltage detection module, voltage detection module
Relay protective scheme module is connected with, relay protective scheme module is connected with switch control module；
First data terminal of USB interface and the second data terminal of USB interface are connected with usb data receiving module；
Voltage detecting one end and the end of voltage detecting two are connected with voltage detection module；
The switch terminals of switching tube are connected with switch control module.
3. a kind of USB interface power supply consumption detection as claimed in claim 2 and protection system, it is characterised in that voltage detecting
Module includes data processing unit, and data processing unit is connected with AD conversion unit, when AD conversion unit is connected with sampling
Between be spaced setup unit；Voltage detecting one end and the end of voltage detecting two are connected with AD conversion unit.
4. a kind of USB interface power supply consumption detection as claimed in claim 2 and protection system, it is characterised in that relay protective scheme
Module includes data comparing unit, and data comparing unit is connected with threshold value storage unit and logic judgment unit；Data are more single
Member is also connected with power consumption calculation module, and logic judgment unit is also connected with switch control module.
5. a kind of USB interface power supply consumption detection as claimed in claim 1 and protection system, it is characterised in that switching tube is adopted
With N-channel MOS pipe, the power positive end of switching tube is the drain electrode of N-channel MOS pipe, and the power supply negative terminal of switching tube is N-channel MOS pipe
Source class, the switch terminals of switching tube are the grid of N-channel MOS pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721031961.4U CN207051884U (en) | 2017-08-17 | 2017-08-17 | A kind of USB interface power supply consumption detection and protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721031961.4U CN207051884U (en) | 2017-08-17 | 2017-08-17 | A kind of USB interface power supply consumption detection and protection system |
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| CN207051884U true CN207051884U (en) | 2018-02-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832592A (en) * | 2018-06-14 | 2018-11-16 | 珠海市魅族科技有限公司 | A kind of USB Type-C protection of connector circuit, method, apparatus and electronic equipment |
| CN110322855A (en) * | 2019-07-11 | 2019-10-11 | 深圳市华星光电技术有限公司 | GOA driving circuit and display device |
-
2017
- 2017-08-17 CN CN201721031961.4U patent/CN207051884U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832592A (en) * | 2018-06-14 | 2018-11-16 | 珠海市魅族科技有限公司 | A kind of USB Type-C protection of connector circuit, method, apparatus and electronic equipment |
| CN110322855A (en) * | 2019-07-11 | 2019-10-11 | 深圳市华星光电技术有限公司 | GOA driving circuit and display device |
| US11158273B1 (en) | 2019-07-11 | 2021-10-26 | Tcl China Star Optoelectronics Technology Co., Ltd. | GOA driving circuit and display device |
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