CN103176878A - Testing device of universal serial bus charging port - Google Patents
Testing device of universal serial bus charging port Download PDFInfo
- Publication number
- CN103176878A CN103176878A CN 201110434800 CN201110434800A CN103176878A CN 103176878 A CN103176878 A CN 103176878A CN 201110434800 CN201110434800 CN 201110434800 CN 201110434800 A CN201110434800 A CN 201110434800A CN 103176878 A CN103176878 A CN 103176878A
- Authority
- CN
- China
- Prior art keywords
- voltage
- comparison signal
- coupled
- upper limit
- unit
- Prior art date
- 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.)
- Pending
Links
Images
Abstract
The invention relates to a testing device of a universal serial bus charging port. The testing device of the universal serial bus charging port is suitable for a computer device provided with the universal serial bus charging port. The testing device comprises a first comparison module, a second comparison module and a judging and display module. The first comparison module is connected to a first transmission end of the universal serial bus charging port in a coupling mode, judges whether a first voltage of the first transmission end is located in a first voltage range, and generates a first comparison signal. The second comparison module is connected to a second transmission end of the universal serial bus charging port in a coupling mode, judges whether a second voltage of the second transmission end is located in a second voltage range, and generates a second comparison signal. The judging and display module receives and judges that the first comparison signal and the second comparison signal are both energy-generation, and therefore a pass prompt is determined and displayed.
Description
Technical field
The present invention relates to a kind of proving installation, relate in particular to a kind of proving installation of USB (universal serial bus) charging port.
Background technology
Along with the progress of science and technology, consumer electronic device is full of in daily life.General user has the multiple consumption type electronic apparatus usually, for example portable computer, mobile phone, music player ... etc.
A lot of electronic installations all needs to utilize USB (universal serial bus) (Universal Serial Bus at present; USB) interface charges, and computer installation now possesses above-mentioned USB (universal serial bus) usually.Yet the disadvantage of this kind charging modes needs to make computer installation to keep just having in normal operation way to charge exactly.
In addition, when the user utilizes USB interface on computer installation that consumer electronic device is charged, because the consumer electronic device of part manufacturer has comparatively strict voltage specification demand for the anodal data terminal (being called for short the D+ end) in the USB interface with negative pole data terminal (being called for short the D-end).In other words, when the D+ end was held under the specific voltage specification with D-, consumer electronic device can charge by USB interface.On the other hand, at the flaw of making, also may cause USB interface at its D+ end and D-end, floating of output voltage to occur due to computer installation, and the USB interface can't be charged normal.
Summary of the invention
The invention provides a kind of proving installation of USB (universal serial bus) charging port, it can detect in the USB charging port, whether the output voltage of anodal data terminal and negative pole data terminal meets required voltage specification.
The present invention proposes a kind of proving installation of USB (universal serial bus) charging port, and it is applicable to have the computer installation of USB (universal serial bus) charging port.Above-mentioned proving installation comprises that first compares module, second relatively module and judgement demonstration module.First compares the first transmission ends that module is coupled to the USB (universal serial bus) charging port, and whether its first voltage that judges the first transmission ends is positioned at first voltage range, and activation the first comparison signal.Second compares the second transmission ends that module is coupled to the USB (universal serial bus) charging port, and whether its second voltage that judges the second transmission ends is positioned at the second voltage scope, and activation the second comparison signal.Judgement shows that module receives and judges that the first comparison signal and the second comparison signal are all activation, uses to determine to show the prompting of passing.
In one embodiment of this invention, first relatively module comprise the first upper limit unit, the first lower limit unit, the first upper limit comparing unit, the first lower limit comparing unit and the first judging unit.The first upper limit unit according to ground voltage and supply voltage to produce the first upper voltage limit of first voltage range.The first lower limit unit according to ground voltage and supply voltage to produce the first lower voltage limit of first voltage range.The first upper limit comparing unit is coupled to the first upper limit unit, receives and compare the magnitude of voltage size of the first upper voltage limit and the first voltage, to export the first upper limit comparison signal.The first lower limit comparing unit is coupled to the first lower limit unit, receives and compare the magnitude of voltage size of the first lower voltage limit and the first voltage, to export the first lower limit comparison signal.The first judging unit is coupled to the first upper limit comparing unit and the first lower limit comparing unit, receives and judges whether the first upper limit comparison signal and the first lower limit comparison signal are all activation, uses output the first comparison signal.
In one embodiment of this invention, the first upper limit unit comprises the first resistance and the second resistance.The first end of the first resistance is coupled to supply voltage, and the second end of the first resistance is coupled to the output terminal of the first upper limit unit.The first end of the second resistance is coupled to the second end of the first resistance and the output terminal of the first upper limit unit, and the second end of the second resistance is coupled to ground voltage.
in one embodiment of this invention, the first upper limit comparing unit comprises the first operational amplifier, its inverting input receives the first upper voltage limit, the non-inverting input of the first operational amplifier receives the first voltage, and the output terminal of the first operational amplifier is coupled to the first input end of the first judging unit to export the first upper limit comparison signal, and, the first lower limit comparing unit comprises the second operational amplifier, its inverting input receives the first voltage, the non-inverting input of the second operational amplifier receives the first lower voltage limit, and the output terminal of the second operational amplifier is coupled to the second input end of the first judging unit to export the first lower limit comparison signal.
In one embodiment of this invention, the first judging unit comprise first with (AND) logic gate, its first input end receives first upper limit comparison signal, and first receives the second upper limit comparison signal with the second input end of logic gate, and first exports the first comparison signal with the output terminal of logic gate.
In one embodiment of this invention, the first judging unit also comprises the first input resistance and the second input resistance.The first input resistance is coupled to first input end.The second input resistance is coupled to the second input end.
In one embodiment of this invention, judgement show module comprise second with logic gate and display unit.Second with the first receiving end of logic gate be coupled to this first relatively module to receive this first comparison signal, and second be coupled to second with the second receiving end of logic gate relatively module be receiving this second comparison signal, and second judge signal with the output terminal output of logic gate.Display unit is coupled to second and logic gate, receives and when working as the activation of judgement signal, sending the prompting of passing.
In one embodiment of this invention, display unit comprises light emitting diode, and it receives the judgement signal by showing resistance, and shinny when the activation of judgement signal.
In one embodiment of this invention, first voltage range is 1.85V to 2.15V, and the second voltage scope is 2.55V to 2.85V.
In one embodiment of this invention, when computer installation is positioned at the S3 holding state, utilize proving installation with test USB (universal serial bus) charging port.
Based on above-mentioned, the described proving installation of the embodiment of the present invention can compare module and the second first voltage range and second voltage scope that compares in module according to being set in advance in first, use the first voltage and the second voltage exported for the USB (universal serial bus) charging port and test, and then detect the USB (universal serial bus) charging port and whether meet charge condition.When the USB (universal serial bus) charging port meets charge condition, electronic installation is able to charge normal on described USB (universal serial bus) charging port, and wherein electronic installation is for example the consumer electronic device of portable computer, mobile phone, music player and so on.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and coordinate accompanying drawing to be described in detail below.
Description of drawings
Fig. 1 shows the test schematic diagram according to the proving installation of the USB charging port of one embodiment of the invention.
Fig. 2 shows the circuit framework figure according to the proving installation of the USB charging port of the embodiment of Fig. 1.The primary clustering symbol description:
100: proving installation
110: the first comparison modules
120: the second comparison modules
130: judgement shows module
140: USB (universal serial bus) (USB) charging port
200,201: upper limit unit
210,211: the lower limit unit
220,221: upper limit comparing unit
230,231: the lower limit comparing unit
222,223,232,233: operational amplifier
240,241: judging unit
242,243,248: with logic gate
250: display unit
252: light emitting diode
CS_1: the first comparison signal
CS_2: the second comparison signal
GND: ground voltage
R1～R14: resistance
V_1: the first voltage
V_2: second voltage
V_C: supply voltage
V_U1: the first upper voltage limit
V_L1: the first lower voltage limit
P_BUS: power end
P_G: earth terminal
Embodiment
Now will in detail with reference to one exemplary embodiment of the present invention, the example of described one exemplary embodiment be described in the accompanying drawings.In addition, all may part, use the identical or similar portions of the assembly/member of same numeral/symbology in graphic and embodiment.
In order to make computer installation in standby, dormancy or even to close etc. under the power supply status of low-power consumption, still can be by universal serial bus (Universal Serial Bus; USB) interface to electronic installation (as portable computer, mobile phone, music player ... etc.) charge, a kind of USB charging port of computer installation thereby be suggested.The USB charging port of above-mentioned computer installation can be positioned under the holding state in S3 stage at computer installation, electronic installation is charged, and the wherein said S3 stage is according to advanced configuration and power supply interface (Advanced Configuration and Power Interface; ACPI) a kind of power supply status that power-management interface defines.ACPI is broadly divided into six stages of S0 to S5, and S1～S3 stage represents holding state, and the S4 stage represents dormant state, and the S5 stage represents closed condition.
At the S3 of ACPI in the stage, except the power source management controller of system storage and formation volatile memory, power supply can not be supplied on computer hardware device, data in processing in the meantime can be stored in system storage, therefore when computer installation switches to normal condition by the holding state in S3 stage, can't carry out general start operation, so can enter in operating system fast.Computer installation with above-mentioned power management function, its power supply assembly can be supported a kind of advanced technology expansion (Advanced Technology Extended that comprises the power supply supply mechanism with primary power and standby power; Be called for short ATX) specification.Externally power supply (for example 110V/220V civil power) is fed in the situation of computer installation, supports the power supply assembly of ATX specification always to export standby power, and this standby power can be supplied on the power source management controller of computer installation.
Due in the holding state in S3 stage, the consumed power of overall calculation machine is quite low, but have simultaneously can quick turn-on characteristic, and computer installation still continues to be powered under the S3 state, therefore namely utilizes this feature development to go out not need computer installation is opened the USB charging port that can utilize USB interface that electronic installation is charged in some computer installations.Yet described USB charging port also can charge in dormant state or the closed condition in S5 stage in S4 stage according to different designs.
Please refer to Fig. 1, Fig. 1 shows the test schematic diagram according to the proving installation of the USB charging port of one embodiment of the invention.As shown in Figure 1, the USB charging port 140 of computer installation can charge to electronic installation under computer installation is in the holding state in S3 stage, wherein USB charging port 140 has 4 transmission ends, these 4 transmission ends are respectively power end P_BUS, the first transmission ends D+, the second transmission ends D-and earth terminal P_G, and wherein the first transmission ends D+ and the second transmission ends D-also can be called respectively anodal data terminal and the negative pole data terminal of USB interface.The first transmission ends D+ of USB charging port 140 and the second transmission ends D-use Double-strand transmission, and it uses semiduplex differential wave collaborative work separately, to offset the electromagnetic interference (EMI) of long lead.
In the USB charging port 140 of general computer installation, power end P_BUS can provide the 5V output voltage of left and right, and earth terminal P_G provides ground voltage GND.With after USB charging port 140 is connected, it can first detect the first voltage V_1 and the second voltage V_2 that the first transmission ends D+ and the second transmission ends D-export and whether meet respectively first voltage range and second voltage scope when electronic installation.In the situation that meet charge condition (namely the first voltage V_1 and second voltage V_2 are respectively in first voltage range and second voltage scope), USB charging port 140 just can charge to electronic installation according to the voltage that power end P_BUS and earth terminal P_G provide.
Hence one can see that, if the voltage specification that the first transmission ends D+ and the second transmission ends D-export is not inconsistent, electronic installation can't be charged normally.Therefore in the proving installation 100 that the embodiment of the present invention proposes, its the first voltage V_1 and second voltage V_2 that can export the first transmission ends D+ and the second transmission ends D-of USB charging port 140 detects, charge condition or the relevant specification of the voltage conforms electronic installation of being exported with the first transmission ends D+ and the second transmission ends D-that guarantees USB charging port 140.
Please refer to Fig. 1, proving installation 100 comprises that first compares module 110, second relatively module 120 and judgement demonstration module 130.First compares the first transmission ends D+ that module 110 is coupled to USB charging port 140, whether is positioned at first voltage range in order to the first voltage V_1 that judges the first transmission ends D+.If the first voltage V_1 is positioned at first voltage range, first compares module 110 activation the first comparison signal CS_1.Second compares module 120 and first, and relatively module 110 is similar, and whether the second transmission ends D-that it is coupled to USB charging port 140 is positioned at the second voltage scope in order to the second voltage V_2 that judges the second transmission ends D-.If second voltage V_2 is positioned at the second voltage scope, second compares module 120 activation the second comparison signal CS_2.Judgement shows module 130 in order to receive and to judge whether the first comparison signal CS_1 and the second comparison signal CS_2 are all activation (enable), uses decision and whether shows qualifying (pass) prompting.In other words, when the first comparison signal CS_1 and the second comparison signal CS_2 are all activation (that is the first comparison signal CS_1 and the second comparison signal CS_2 of this moment all are positioned at high logic level), proving installation 100 shows that namely qualifying points out.In an embodiment of the present invention, can be positioned at S3 during the stage at computer installation, utilize proving installation 100 to test USB (universal serial bus) (USB) charging port on computer installation.Yet proving installation 100 also can be at the above-mentioned USB charging port of the power management stage of S4 or other ACPI test, and the present invention is not as limit.
For instance, when proving installation 100 received the first voltage V_1, first compares module 110 will judge whether the first voltage V_1 that receives meets in desired first voltage range.When above-mentioned the first voltage V_1 was positioned at first voltage range, first compared the first comparison signal CS_1 of module 110 transmission activations to judgement demonstration module 130.Relatively, when above-mentioned the first voltage V_1 was not positioned at first voltage range, first compared the first comparison signal CS_1 of 110 transmission forbidden energy of module (disable) to judgement demonstration module 130 (that is the first comparison signal CS_1 at this moment is positioned at low logic level).Second relatively 120 of modules with first relatively the similar mode of module 110 second voltage V_2 is judged and transmits the second comparison signal CS_2 to judgement demonstration module 130.
When judgement showed that the first received comparison signal CS_1 of module 130 is all enabled status with the second comparison signal CS_2, namely can showing passes pointed out.At this moment, the USB charging port 140 of computer installation can be confirmed as the normal state of Voltage-output, therefore can charge to electronic installation; Anti-, if the first comparison signal CS_1 and the second comparison signal CS_2 wherein one or both when being all forbidden energy, judgement shows that module 130 will can not show the prompting of passing, and uses expression USB charging port 140 at this moment and can't charge to electronic installation.
Above-mentioned proving installation 100 can further be realized its function with circuit framework shown in Figure 2.Fig. 2 shows the circuit framework figure according to the proving installation 100 of the USB charging port of the embodiment of Fig. 1.Please refer to Fig. 2, in the present embodiment, first compares module 110 and second compares module 120 with similar circuit framework realization, yet the present invention is not limited to this.
Please be simultaneously with reference to Fig. 1 and Fig. 2, first relatively module 110 comprise the first upper limit unit 200, the first lower limit unit 210, the first upper limit comparing unit 220, the first lower limit comparing unit 230 and the first judging unit 240.The first upper limit unit 200 and the first lower limit unit 210 be the first upper voltage limit V_U1 and the first lower voltage limit V_L1 to produce respectively first voltage range according to ground voltage GND and supply voltage V_C.The first upper limit comparing unit 220 couples the first transmission ends D+ of the first upper limit unit 200 and USB charging port 140, receives and compare the magnitude of voltage size of the first upper voltage limit V_U1 and the first voltage V_1, to export the first upper limit comparison signal CS_U1.The first 230 of lower limit comparing units are similar to the first upper limit comparing unit 220, it couples the second transmission ends D-of the first lower limit unit 210 and USB charging port 140, receive and compare the magnitude of voltage size of the first lower voltage limit V_L1 and the first voltage V_1, to export the first lower limit comparison signal CS_L1.The first judging unit 240 is coupled to the first upper limit comparing unit 220 and the first lower limit comparing unit 230, and its reception also judges the first upper limit comparison signal CS_U1 and whether the first lower limit comparison signal CS_L1 is all activation, uses output the first comparison signal CS_1.For example, when the first upper limit comparison signal CS_U1 and the first lower limit comparison signal CS_L1 are all activation, the first comparison signal CS_1 of 240 output enables of the first judging unit.
At first relatively in module 110 of the present embodiment, the first upper limit unit 200 can utilize the first resistance R 1 and the second resistance R 2 to be realized.Please refer to Fig. 2, the first end of the first resistance R 1 is coupled to supply voltage V_C, and its second end is coupled to the output terminal of the first upper limit unit 200.The first end of the second resistance is coupled to the second end of the first resistance and the output terminal of the first upper limit unit 200, and its second end is coupled to ground voltage GND.Therefore, the first upper limit unit 200 utilizes the voltage difference between the first resistance R 1 and 2 couples of supply voltage V_C of the second resistance R and ground voltage GND to carry out dividing potential drop, to produce the first upper voltage limit V_U1.In the same manner, the first lower limit unit 210 also utilizes resistance R 3 and resistance R 4 to produce the first lower voltage limit V_L1.
The first upper limit comparing unit 220 and 230 of the first lower limit comparing units utilize respectively the first operational amplifier 222 and the second operational amplifier 232 to be realized.The inverting input of the first operational amplifier 222 couples the output terminal of the first upper limit unit 200 to receive the first upper voltage limit V_U1, and its non-inverting input receives by input resistance R5 the first voltage V_1 that the first transmission ends D+ transmits.The output terminal of the first operational amplifier 222 is coupled to the first input end of the first judging unit 240, to export the first upper limit comparison signal CS_U1 to the first judging unit 240.The inverting input of the second operational amplifier 232 receives the first voltage V_1 by input resistance R5, its non-inverting input couples the output terminal of the first lower limit unit 210, to receive the first lower voltage limit V_L1, and its output terminal is coupled to the second input end of the first judging unit 240, to export the first lower limit comparison signal CS_L1 to the first judging unit 240.
In the present embodiment, the first judging unit 240 utilizes first with (AND) logic gate 242, the first input resistance R6 and the second input resistance R7 are realized.First couples output terminal and the first input resistance R6 of the first upper limit comparing unit 220 with the first input end of logic gate 242, receiving the first upper limit comparison signal CS_U1, and supply voltage V_C is coupled to the first input end of the first logic gate 242.Similarly, first couples output terminal and the second input resistance R7 of the first lower limit comparing unit 230 with the second input end of logic gate 242, receiving the first lower limit comparison signal CS_L1, and supply voltage V_C is coupled to the second input end of the first logic gate 242.By this, first export first comparison signal CS_1 according to the first upper limit comparison signal CS_U1 that receives and the first lower limit comparison signal CS_L1 at output terminal with logic gate 242.
Second compares module 120 and first, and relatively module 110 is similar.Second relatively module 110 comprise the second upper limit unit 201, the second lower limit unit 211, the second upper limit comparing unit 221, the second lower limit comparing unit 231 and the second judging unit 241.The second upper limit unit 201 comprises resistance R 8 and R9, and the second lower limit unit 211 comprises resistance R 10 and R11.The second upper limit comparing unit 221, the second lower limit comparing unit 231 all receive second voltage V_2 by input resistance R12.In the present embodiment, the second upper limit comparing unit 221, the second lower limit comparing unit 231 realize with operational amplifier 223 and 233 respectively, and the second 241 of judging units utilization and logic gate 243, input resistance R13 and input resistance R14 are realized.By this, the second comparison module 120 is exported the second comparison signal CS_2 by the framework similar to the first comparison module 110 and judgement flow process, will not add to give unnecessary details at this.
Second relatively module 120 with first relatively the difference of module 110 be that the voltage specification that the first transmission ends D+ and the second transmission ends D-test is different, so relatively the voltage range of module 120 required comparisons is also not identical for the first comparison module 110 and second.Therefore, resistance R 8, R9, R10, R11 have the resistance value that is different from the first resistance R 1, the second resistance R 2 and resistance R 3, R4, to produce different up/down voltage limit scopes.
In the present embodiment, judgement show module 130 comprise second with logic gate 248 and display unit 250.Second with the first receiving end of logic gate 248 be coupled to first relatively module 110 to receive the first comparison signal CS_1, its second receiving end is coupled to second, and relatively module 120 is to receive the second comparison signal CS_2, and therefore second can judge signal S_D in output terminal output according to the first comparison signal CS_1 that receives and the second comparison signal CS_2 with logic gate 248.Display unit 250 couple second with the output terminal of logic gate 248, and receive the second judgement signal S_D that exports with logic gate 248, and judgement is sent to pass and is pointed out when judgement signal S_D activation.In the present embodiment, display unit 250 can utilize light emitting diode 252 to be realized above-mentioned qualifying prompting.Specifically, light emitting diode 252 receives judgement signal S_D by showing resistance R 15.When judgement signal S_D activation, light emitting diode 252 just can be shinny to point out the satisfactory voltage range of Voltage-output of the USB charging port of being tested, and the consumer electronic device that meets the voltage range of proving installation can normally charge by this USB charging port.
The circuit framework implementation method of each above-mentioned unit, it is only an one exemplary embodiment of the present invention, in other embodiments, in those skilled in the art, can by other circuit framework form reach with the present invention in each module function identical with the unit, so the present invention is not limited only to described this.
Further say, as Fig. 1 and shown in Figure 2, when the inverting input of the non-inverting input of the first operational amplifier 222 and the second operational amplifier 232 receives the first voltage V_1 that the first transmission ends D+ of USB charging port 140 transmits, take the first operational amplifier 222 as example, the first voltage V_1 is coupled to the non-inverting input of the first amplifier 222 via resistance R 5, the first operational amplifier 222 can compare by the first upper voltage limit V_U1 and the first voltage V_1 received according to non-inverting input.Because the part consumption electronic products must charge lower could the beginning of specific standard (the USB charging specification of products such as the iphone that is sold by Apple, ipod) of USB charging port, therefore in the present embodiment, the resistance value of the first resistance R 1, the second resistance R 2 can be respectively 10k Ω, 5.9k Ω, and the first upper voltage limit V_U1 can be 2.15V.If the first voltage V_1 is greater than the first upper voltage limit V_U1, the first 222 of operational amplifiers are exported the first upper limit comparison signal CS_U1 of forbidden energy; Otherwise, if the first voltage V_1 less than the first upper voltage limit V_U1, the first upper limit comparison signal CS_U1 of 222 output enables of the first operational amplifier.
The second operational amplifier 232 is because it receives the first voltage V_1 for inverting input, and non-inverting input receives the first lower voltage limit V_L1, therefore as the first voltage V_1 during less than the first lower voltage limit V_L1, the second operational amplifier 232 is exported the first lower limit comparison signal CS_L1 of forbidden energy; Otherwise, if the first voltage V_1 greater than the first lower voltage limit V_L1, the first lower limit comparison signal CS_L1 of 232 output enables of the second operational amplifier.In the present embodiment, resistance R 3 can be respectively 10k Ω and 7.6k Ω with the resistance value of resistance R 4, and it is the logic chip of LM339 that the first operational amplifier 222 and the second operational amplifier 232 can adopt model, and the first lower voltage limit V_L1 can be 1.85V.In other words, first voltage range can be 1.85V to 2.15V, or is described as 2.0V ± 0.15V.
First receives respectively the first above-mentioned upper limit comparison signal CS_U1 and the first lower limit comparison signal CS_L1 with first input end and second input end of logic gate 242.Have with logic gate 242 characteristic of just understanding output enable signal when input signal need be positioned at enabled status simultaneously due to first, therefore, when the first upper limit comparison signal CS_U1 and the first lower limit comparison signal CS_L1 activation simultaneously, first just can export the first comparison signal CS_1 of an activation with logic gate 242.In addition, in the present embodiment, resistance R 6～R7, R13 and R14 are all 10k Ω.Similarly, the second comparison module 120 obtains the second comparison signal CS_2 according to above-mentioned signal flow.In the present embodiment, the resistance value of resistance R 8, R9, R10, R11 is respectively 10k Ω, 10.5k Ω, 10k Ω, 13.3k Ω, and the second voltage scope is 2.55V to 2.85V, or is described as 2.7V ± 0.15V.
Judgement shows that second in module 130 and logic gate 248 receive the first comparison signal CS_1 and the second comparison signal CS_2.At this moment, when the first comparison signal CS_1 and the second comparison signal CS_2 are all activation, second with the judgement signal S_D of an activation of logic gate 248 outputs, make light emitting diode 252 be lit because of received judgement signal S_D.Therefore, whether the user can conform with desired Voltage-output specification with the first voltage V_1 and the second voltage V_2 that the first transmission ends D+ of learning USB charging port 140 and the second transmission ends D-are exported according to the bright dark variation of light emitting diode 252.In the present embodiment, first to adopt models with logic gate 242 and second with logic gate 248 be 7408 logic chip, and the resistance value of demonstration resistance R 15 can be 220 Ω.
in sum, the proving installation of the embodiment of the present invention provides the test of the output voltage of the first transmission ends and the second transmission ends in the USB charging port, it is tested the first voltage and the second voltage exported according to the first voltage range and the second voltage scope that set, and point out the expression charging port whether to meet desired voltage specification with the qualifying bright dark or alternate manner of light emitting diode test result, and then detect the USB charging port and whether meet charge condition, and whether above-mentioned electronic installation is able to normally charge by this USB charging port.
Although the present invention discloses as above with embodiment; but it is not to limit the present invention; any person of ordinary skill in the field; without departing from the spirit and scope of the present invention; when doing suitable change and equal the replacement, therefore protection scope of the present invention should be as the criterion with the scope that the application's claim is defined.
Claims (10)
1. the proving installation of a USB (universal serial bus) charging port is applicable to have a computer installation of this USB (universal serial bus) charging port, it is characterized in that, this proving installation comprises:
One first compares module, is coupled to one first transmission ends of this USB (universal serial bus) charging port, judges whether one first voltage of this first transmission ends is positioned at a first voltage range, and activation one first comparison signal;
One second compares module, is coupled to one second transmission ends of this USB (universal serial bus) charging port, judges whether a second voltage of this second transmission ends is positioned at a second voltage scope, and activation one second comparison signal; And
One judgement shows module, receives and judges that this first comparison signal and this second comparison signal are all activation, uses to determine to show a qualifying prompting.
2. proving installation according to claim 1, wherein this first relatively module comprise:
One first upper limit unit, according to a ground voltage and a supply voltage to produce one first upper voltage limit of this first voltage range;
One first lower limit unit, according to this ground voltage and this supply voltage to produce one first lower voltage limit of this first voltage range;
One first upper limit comparing unit is coupled to this first upper limit unit, receives and relatively this first upper voltage limit is big or small with the magnitude of voltage of this first voltage, to export one first upper limit comparison signal;
One first lower limit comparing unit is coupled to this first lower limit unit, receives and relatively this first lower voltage limit is big or small with the magnitude of voltage of this first voltage, to export one first lower limit comparison signal; And
One first judging unit is coupled to this first upper limit comparing unit and this first lower limit comparing unit, receives and judges whether this first upper limit comparison signal and this first lower limit comparison signal are all activation, uses this first comparison signal of output.
3. proving installation according to claim 2, wherein this first upper limit unit comprises:
One first resistance, its first end is coupled to a supply voltage, and the second end of this first resistance is coupled to the output terminal of this first upper limit unit;
One second resistance, its first end are coupled to the second end of this first resistance and the output terminal of this first upper limit unit, and the second end of this second voltage resistance is coupled to a ground voltage.
4. proving installation according to claim 2, wherein this first upper limit comparing unit comprises:
One first operational amplifier, its inverting input receives this first upper voltage limit, the non-inverting input of this first operational amplifier receives this first voltage, and the output terminal of this first operational amplifier is coupled to a first input end of this first judging unit to export this first upper limit comparison signal, and
This first lower limit comparing unit comprises:
One second operational amplifier, its inverting input receives this first voltage, the non-inverting input of this second operational amplifier receives this first lower voltage limit, and the output terminal of this second operational amplifier is coupled to one second input end of this first judging unit to export this first lower limit comparison signal.
5. proving installation according to claim 2, wherein this first judging unit comprises:
One first and logic gate, its first input end receives this first upper limit comparison signal, and this first receives this second upper limit comparison signal with the second input end of logic gate, and this first exports this first comparison signal with the output terminal of logic gate.
6. proving installation according to claim 5, wherein this first judging unit also comprises:
One first input resistance is coupled to this first input end; And
One second input resistance is coupled to this second input end.
7. proving installation according to claim 1, wherein this judgement shows that module comprises:
One second and logic gate, its first receiving end is coupled to this first comparison module to receive this first comparison signal, this second with the second receiving end of logic gate be coupled to this second relatively module receiving this second comparison signal, and this second with the output terminal output one judgement signal of logic gate; And
One display unit, be coupled to this second and logic gate, receive and when working as this judgement signal activation, send this qualifying prompting.
8. proving installation according to claim 7, wherein this display unit comprises:
One light emitting diode, it shows that by one resistance receives this judgement signal, and shinny when this judgement signal activation.
9. proving installation according to claim 1, wherein this first voltage range is 1.85V to 2.15V, and this second voltage scope is 2.55V to 2.85V.
10. proving installation according to claim 1, wherein when this computer installation is positioned at the S3 holding state, utilize this proving installation to test this USB (universal serial bus) charging port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110434800 CN103176878A (en) | 2011-12-22 | 2011-12-22 | Testing device of universal serial bus charging port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110434800 CN103176878A (en) | 2011-12-22 | 2011-12-22 | Testing device of universal serial bus charging port |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103176878A true CN103176878A (en) | 2013-06-26 |
Family
ID=48636777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110434800 Pending CN103176878A (en) | 2011-12-22 | 2011-12-22 | Testing device of universal serial bus charging port |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103176878A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114141189A (en) * | 2021-12-09 | 2022-03-04 | 奕力科技股份有限公司 | Display driving circuit and display driving method thereof |
-
2011
- 2011-12-22 CN CN 201110434800 patent/CN103176878A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114141189A (en) * | 2021-12-09 | 2022-03-04 | 奕力科技股份有限公司 | Display driving circuit and display driving method thereof |
| CN114141189B (en) * | 2021-12-09 | 2023-11-14 | 奕力科技股份有限公司 | Display driving circuit and display driving method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9483093B2 (en) | Electronic device and method for controlling a setting of a maximum consumption current | |
| CN101674366B (en) | Mobile terminal USB, or charger inserting identification method and identification device thereof | |
| JP6359459B2 (en) | Mobile terminal and charging device and method thereof | |
| CN103186483B (en) | Terminal, for its OTG function and the executed in parallel method of charge function | |
| CN201813422U (en) | Charging chip and mobile terminal capable of automatically adjusting charging mode | |
| CN102299532B (en) | Charging device | |
| CN102243618A (en) | Universal serial bus device, bus interfacing device and related method | |
| TW201439740A (en) | Universal power interface | |
| CN102147652A (en) | Shut-down energy-saving system and shut-down energy-saving method | |
| CN205050134U (en) | Portable power source TYPE -C interface management circuit | |
| CN103633671A (en) | Charging device for charging multiple batteries and bidirectional charging method | |
| CN103576092A (en) | Remote controller and device and method for detecting electricity capacity of battery of remote controller | |
| TWI408541B (en) | Power management device for a computer system and related power management method and computer system | |
| CN104065124A (en) | Mobile terminal with false battery function and false battery enabling and disabling method thereof | |
| WO2014187415A1 (en) | Charging cable and charging system | |
| CN203643943U (en) | Multifunctional starting circuit and Bluetooth product | |
| CN106292989A (en) | A kind of information processing method and electronic equipment | |
| CN106797414A (en) | The leakage current detection circuit and terminal of a kind of terminal | |
| CN104486089A (en) | Computer network awakening method and device | |
| CN103176878A (en) | Testing device of universal serial bus charging port | |
| CN204407944U (en) | The Function detection circuit of tool intelligence USB identification chip | |
| CN104181380A (en) | Light load current detection system | |
| US10108243B1 (en) | Smart USB plug detection | |
| CN104124718B (en) | Electric supply installation and method of supplying power to | |
| CN217063841U (en) | Low-power consumption network camera and solar charging control device thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130626 |