CN204362018U - A kind of USB device power supply circuits and electronic installation - Google Patents
A kind of USB device power supply circuits and electronic installation Download PDFInfo
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- CN204362018U CN204362018U CN201520077970.1U CN201520077970U CN204362018U CN 204362018 U CN204362018 U CN 204362018U CN 201520077970 U CN201520077970 U CN 201520077970U CN 204362018 U CN204362018 U CN 204362018U
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Abstract
The utility model discloses a kind of USB device power supply circuits and electronic installation, wherein, USB device power supply circuits comprise: delays time to control module and switch power module, and wherein, switch power module comprises the first power supply; Delays time to control module is used for exporting the first level signal and the second electrical level signal anti-phase with it to switch power module successively after USB device power supply circuits power on, and wherein the duration of the first level signal is not less than default time of delay; The first level signal that switch power module is used for according to receiving makes to form open circuit between the first power supply and the USB device of outside, and makes to form path between the first power supply and described USB device according to the second electrical level signal received.USB device power supply circuits of the present utility model, when ensureing that USB device normally works and effectively can realize the power management of USB device, can reduce the hardware cost of corresponding electronic installation, and can reduce the operating time of user.
Description
Technical field
The utility model relates to electronic technology field, particularly relates to a kind of USB device power supply circuits and electronic installation.
Background technology
A lot of electronic installation is all provided with USB (Universal Serial Bus, USB) interface at present, and such as television set, Set Top Box, language repeater, player etc. are all provided with USB interface.When electronic installation is just opened, USB device is inserted into the USB interface of electronic installation, many times USB device can not reacted, and therefore, corresponding USB device also just can not normally work.Occur that the reason of above-mentioned situation is: when electronic installation is just opened, the power supply powered on to the USB device power supply circuits in electronic installation is also unstable, therefore, USB device power supply circuits also just can not provide power supply for corresponding USB device and cause USB device cisco unity malfunction.
USB device power supply circuits of the prior art are by arranging independent current source managing chip or power management software carries out power management to USB device, to solve the problem that above-mentioned USB device can not normally work, wherein, be provided with the USB device power supply circuits of independent current source managing chip, used by current most of electronic installation, owing to needing to increase extra power management chip, therefore considerably increase the hardware cost of electronic installation; Being provided with the USB device power supply circuits of power management software, is generally the form using WATCHDOG in software code, and when electronic installation is read less than USB device, after placing certain hour, electronic installation can be restarted, like this operating time of meeting adding users.
Utility model content
In view of this, the utility model embodiment provides a kind of USB device power supply circuits and electronic installation, to solve the technical problem that above-mentioned USB device power supply circuits of the prior art exist.
First aspect, the utility model embodiment provides a kind of USB device power supply circuits, comprising: delays time to control module and switch power module, and wherein, described switch power module comprises the first power supply;
Described delays time to control module is used for exporting the first level signal and the second electrical level signal anti-phase with described first level signal to described switch power module successively after described USB device power supply circuits power on, and the duration of wherein said first level signal is not less than default time of delay;
Described first level signal that described switch power module is used for according to receiving makes to form open circuit between described first power supply and the USB device of outside, and makes to form path between described first power supply and described USB device according to the described second electrical level signal received.
Further, described USB device power supply circuits also comprise interface module, and described interface module is for connecting described switch power module and described USB device.
Further, described delays time to control module comprises the first resistance, the first capacitor, the second capacitor, timing chip, second source and the level signal output for exporting described first level signal and described second electrical level signal, wherein, timing chip comprises the first pin to the 8th pin;
One end of described first capacitor is connected with the 4th pin of described second source, described timing chip and the 8th pin respectively, the other end of described first capacitor is connected with one end of described first resistance, the second pin of described timing chip and the 6th pin respectively, the other end ground connection of described first resistance, first pin ground connection of described timing chip, 5th pin of described timing chip is by described second capacitor grounding, 3rd pin of described timing chip is connected with described level signal output, and the 7th pin of described timing chip is unsettled.
Further, described first resistance is adjustable resistance.
Further, described switch power module also comprise the second resistance, the 3rd resistance, the 4th resistance, the first triode, the second triode, for receiving level signal input and the switched power output of the first level signal and second electrical level signal;
One end of described second resistance, one end of described 3rd resistance links together and is connected with described level signal input, the other end of described second resistance is connected with the first pole of described first triode, second pole ground connection of described first triode, 3rd pole of described first triode is connected with one end of described 4th resistance and the first pole of described second triode respectively, second pole of described second triode, the other end of described 3rd resistance links together with the other end of described 4th resistance and is connected with described first power supply, 3rd pole of described second triode is connected with described switched power output.
Further, described first triode is double pole triode or fet.
Further, described second triode is double pole triode or fet.
Further, described second triode is PNP double pole triode or P type fet.
Second aspect, the utility model embodiment also provides a kind of electronic installation, comprises the USB device power supply circuits described in above-mentioned first aspect.
The USB device power supply circuits that the utility model embodiment provides and electronic installation, by arranging delays time to control module and the switch power module comprising the first power supply in USB device power supply circuits, wherein, delays time to control module can export the first level signal and the second electrical level signal anti-phase with it to switch power module successively after USB device power supply circuits power on, and the duration of the first level signal is not less than default time of delay, switch power module makes to form open circuit between the first power supply and the USB device of outside according to the first level signal received, and make to form path between the first power supply and described USB device according to the second electrical level signal received, such USB device power supply circuits are when ensureing that USB device normally works and effectively can realize the power management of USB device, the hardware cost of corresponding electronic installation can be reduced, and the operating time of user can be reduced.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present utility model will become more obvious:
Fig. 1 is the structural representation of a kind of USB device power supply circuits that the utility model embodiment provides;
Fig. 2 is the circuit diagram of a kind of delays time to control module that the utility model embodiment provides;
Fig. 3 is the circuit diagram of a kind of switch power module that the utility model embodiment provides;
Fig. 4 is the circuit diagram of a kind of interface module that the utility model embodiment provides;
Fig. 5 is the circuit diagram of a kind of USB device power supply circuits that the utility model embodiment provides.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.Be understandable that, specific embodiment described herein only for explaining the utility model, but not to restriction of the present utility model.It also should be noted that, for convenience of description, illustrate only the part relevant to the utility model in accompanying drawing but not full content.
The utility model embodiment provides a kind of USB device power supply circuits.Fig. 1 is the structural representation of a kind of USB device power supply circuits that the utility model embodiment provides.As shown in Figure 1, described USB device power supply circuits 10 comprise: delays time to control module 11 and switch power module 12, and wherein, described switch power module 12 comprises the first power vd D1; Described delays time to control module 11 for exporting the first level signal and the second electrical level signal anti-phase with it to described switch power module 12 successively after described USB device power supply circuits power on, and the duration of wherein said first level signal is not less than default time of delay; Described switch power module 12 for making to form open circuit between described first power vd D1 and the USB device 21 of outside according to described first level signal received, and makes to form path between described first power vd D1 and described USB device 21 according to the described second electrical level signal received.
Particularly, above-mentioned USB device power supply circuits 10 can be arranged in an electronic.When electronic installation is just opened, the power supply (this power supply is second source described below) powered on for giving the USB device power supply circuits 10 in electronic installation and other circuit or device is unstable, have some shakes, this can make USB device power supply circuits 10 can not provide power supply for the USB device 21 be inserted on it, correspondingly, USB device 21 also just can not normally work.In the case, even if after electronic installation is opened completely, the power supply namely for starting USB device power supply circuits 10 in electronic installation and other circuit or device can settle out, and corresponding USB device can not normally work.But under normal circumstances, after electronic installation is opened completely, USB device power supply circuits 10 can provide power supply for the USB device 21 be inserted on it and make this USB device 21 normally work.And for electronic installation, it has just been opened to the time interval of opening completely and can have detected, and therefore, in actual design, above-mentioned default time of delay can be set to electronic installation and just be opened to the time interval of opening completely.
After USB device power supply circuits 10 power on, because the power supply now powering on to USB device power supply circuits 10 is also unstable, the first level signal control switch power module 12 that delays time to control module 11 produces makes to form open circuit between the first power vd D1 in switch power module 12 and the USB device 21 of outside, therefore, in the case, the labile state of the power supply powered on to USB device power supply circuits 10 can not have influence on USB device, duration due to the first level signal is not less than default time of delay, therefore, first level signal can last till that the power good powered on to USB device power supply circuits 10 gets off, then, delays time to control module 11 produces the second electrical level signal anti-phase with the first level signal again, now, this second electrical level Signal-controlled switch power module 12 makes to form path between the first power vd D1 and USB device 21, USB device power supply circuits 10 start to provide power supply (this power supply is the first above-mentioned power vd D1) to USB device 21, and USB device can be enable normally to work, thus the problem that USB device is powered can be solved and the power management effectively realized USB device.
Above-mentioned delays time to control module 11 can adopt the timing chip of low cost and common resistance and capacitor to obtain, switch power module 12 can adopt common triode and resistance to obtain, therefore, with power management chip be set in USB device power supply circuits carry out compared with power management to USB device, USB device power supply circuits of the present utility model can reduce the hardware cost of corresponding electronic installation; In addition, because above-mentioned default time of delay is shorter, therefore, and arrange compared with power management software in USB device power supply circuits, USB device power supply circuits of the present utility model can reduce the operating time of user.
It should be noted that, the first level signal that above-mentioned delays time to control module 11 produces can be low level signal, second electrical level signal can be high level signal, or the first level signal can be high level signal, second electrical level signal can be low level signal, and switch power module 12 can design accordingly according to the production of the first level signal and second electrical level signal.
Further, as shown in Figure 1, described USB device power supply circuits also comprise interface module 13, and described interface module 13 is for connecting described switch power module 12 and described USB device 21.
In the utility model embodiment, further, as shown in Figure 2, described delays time to control module can comprise the first resistance R1, the first capacitor C1, the second capacitor C2, timing chip U1, second source VDD2 and the level signal output EL_OUT for exporting described first level signal and described second electrical level signal, wherein, described timing chip U1 comprises the first pin to the 8th pin (being P1 ~ P8 in the drawings), one end of described first capacitor C1 respectively with described second source VDD2, the 4th pin P4 of described timing chip U1 is connected with the 8th pin P8, the other end of described first capacitor C1 respectively with one end of described first resistance R1, the second pin P2 of described timing chip U1 is connected with the 6th pin P6, the other end ground connection GND of described first resistance R1, the first pin P1 ground connection GND of described timing chip U1, the 5th pin P5 of described timing chip U1 is by described second capacitor C2 ground connection GND, the 3rd pin P3 of described timing chip U1 is connected with described level signal output EL_OUT, the 7th pin P7 of described timing chip U1 is unsettled.In addition, in fig. 2, delays time to control module also comprises diode D1, wherein the plus earth of diode D1, and the negative electrode of diode D1 is connected with level signal output EL_OUT.In actual design, the model of above-mentioned timing chip U1 can be NE555, the voltage of second source VDD2 can be 12V, the capacitance of the first capacitor C1 can be 4.7 μ F, the capacitance of the second capacitor C2 can be 10nF, the resistance value of the first resistance R1 can be the model of 2M Ω, diode D1 can be 1N4148.And when the resistance value that the capacitance of the first capacitor C1 is 4.7 μ F and the first resistance R1 is 2M Ω, default time of delay is 10s.
In the utility model embodiment, as shown in Figure 2, preferably, described first resistance R1 is adjustable resistance.By regulating the resistance value of the first resistance R1, the product of the capacitance of the first capacitor C1 and the resistance value of the first resistance R1 can be changed, thus the different time of delay of presetting can be obtained.
In the utility model embodiment, further, as shown in Figure 3, described switch power module also comprise the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the first triode Q1, the second triode Q2, for receiving level signal input EL_IN and the switched power output of the first level signal and second electrical level signal, one end of described second resistance R2, one end of described 3rd resistance R3 links together and is connected with described level signal input EL_IN, the other end of described second resistance R2 is connected with first pole of described first triode Q1, the second pole ground connection of described first triode Q1, 3rd pole of described first triode Q1 is connected with one end of described 4th resistance R4 and first pole of described second triode Q2 respectively, second pole of described second triode Q2, the other end of described 3rd resistance R3 links together with the other end of described 4th resistance R4 and is connected with described first power vd D1, 3rd pole of described second triode Q2 is connected with described switched power output PW_OUT.
In figure 3, described first triode Q1 is NPN double pole triode, and described second triode Q2 is P type fet.Correspondingly, the first very base stage of the first triode Q1, its second very emitter, its 3rd very collector electrode; The first very grid of the second triode Q2, its second very source electrode, it the 3rd very drains.In actual design, the model of the first triode Q1 can be 2N3904, and the model of the second triode Q1 can be AO3403, and the resistance value of the second resistance R2 and the 4th resistance R4 can be 1K Ω, the resistance value of the 3rd resistance R3 can be 10K Ω, and the voltage of the first power vd D1 is 5V.The first triode Q1 set in Fig. 3 and the type of the second triode Q2 are low level signal and second electrical level signal with the first level signal that delays time to control module produces is that high level signal is corresponding.
It should be noted that, in figure 3, first triode Q1 elects NPN double pole triode and the second triode Q2 as, and to elect P type fet as be only that the utility model is about the concrete example arranging the first triode Q1 and the second triode Q2, in other concrete example, first triode Q1 can elect NPN double pole triode as and the second triode Q2 can elect PNP double pole triode as, or the first triode Q1 can elect PNP double pole triode as, P type fet or N-type fet and corresponding second triode Q2 can elect PNP double pole triode or P type fet as.Wherein, when the first triode Q1 elects NPN double pole triode or N-type fet as, the first corresponding level signal is low level signal and second electrical level signal is high level signal; When the first triode Q1 elects PNP double pole triode or P type fet as, the first corresponding level signal is high level signal and second electrical level signal is low level signal.Above-mentioned low level signal refers to that the level value of this level signal is less than the threshold voltage of the first triode Q1, and above-mentioned high level signal refers to that the level value of this level signal is greater than the threshold voltage of the first triode Q1.
Particularly, when PNP double pole triode elected as by the first triode, its first very base stage, its second very collector electrode, its 3rd very emitter; When N-type fet elected as by the first triode, its first very grid, its second very source electrode, it the 3rd very drains; When P type fet elected as by the first triode, its first very grid, it second very drains, its 3rd very source electrode; When PNP double pole triode elected as by the second triode, its first very base stage, its second very emitter, its 3rd very collector electrode.
In the utility model embodiment, further, as shown in Figure 4, shown interface module comprises fuse F1, the 3rd capacitor C3, interface chip U2, power input PW_IN, positive interface end D+ and negative interface end D-, wherein, shown interface chip U2 comprises the first pin to the 8th pin, and the 4th pin is grounding pin to the 8th pin, and is connected to ground GND; Power input PW_IN is connected with the first pin VBUS of interface chip U2 by fuse F1, one end of 3rd capacitor C3 is connected with the first pin VBUS, the other end ground connection GND of the 3rd capacitor C3, the second pin USBD-of interface chip U2 as negative interface end D-and the 3rd pin USBD+ as positive interface end D+, and the interface end be jointly connected with USB device as USB device power supply circuits.In actual design, the maximum current of fuse F1 is 1A, and the capacitance of the 3rd capacitor C3 is 100nF.
Fig. 5 is the circuit diagram of a kind of USB device power supply circuits that the utility model embodiment provides.As shown in Figure 5, delays time to control module 11 adopts the delays time to control module shown in Fig. 2, and switch power module 12 adopts the switch power module shown in Fig. 3, and interface module 13 adopts the interface module shown in Fig. 4.Next the operation principle of the USB device power supply circuits shown in Fig. 5 is described further.
After USB device power supply circuits power on, delays time to control module 11 first produces low level first level signal and exports to the level signal input EL_IN of switch power module 12 from level signal output EL_OUT, the first transistor Q1 ends, transistor seconds Q2 ends, it is open circuit between first power vd D1 and switched power output PW_OUT, namely be open circuit between the power input PW_IN of interface module 13 and the first power vd D1, therefore, the USB device be connected with positive interface end D+ and the negative interface end D-of interface module 12 does not obtain the power supply that USB device power supply circuits provide, after the time of delay of presetting, delays time to control module 11 produces the second electrical level signal of high level and exports to the level signal input EL_IN of switch power module 12 from level signal output EL_OUT, the first transistor Q1 conducting, the first pole ground connection GND of transistor seconds Q2, transistor seconds Q2 conducting, be path between first power vd D1 and switched power output PW_OUT, namely be path between the power input PW_IN of interface module 13 and the first power vd D1, therefore, the USB device be connected with positive interface end D+ and the negative interface end D-of interface module 12 obtains power supply that USB device power supply circuits provide and starts normal work.Therefore, as mentioned above, for the USB device power supply circuits shown in Fig. 5, USB device can not be had influence on to the labile state of its power supply powered on, and these USB device power supply circuits can enable USB device normally work, thus the problem that USB device is powered can be solved and the power management effectively realized USB device.
After the power good powering on to USB device power supply circuits, again USB device is plugged, if USB device can not normally work, then in order to solve this problem, the level signal input EL_IN of switch power module 12 of USB device power supply circuits shown in Fig. 5 can draw a port (supposing that this port EL_IN1 represents), and this port EL_IN1 is connected with the CPU in the electronic installation at USB device power supply circuits place.When CPU detects that the USB device of above-mentioned situation can not normally work, CPU first sends low level signal to port EL_IN1, and corresponding first triode Q1 and the second triode Q2 all ends, and USB device power supply circuits stop providing power supply to USB device; Then CPU sends high level signal to port EL_IN1 again, corresponding first triode Q1 conducting, and making the second triode Q2 conducting, USB device power supply circuits continue to provide power supply to USB device, USB device can be enable so normally to work and effectively realize the power management to USB device.The utility model embodiment also provides a kind of electronic installation, and wherein said electronic installation comprises the USB device power supply circuits described in the various embodiments described above.
The USB device power supply circuits that the utility model embodiment provides and electronic installation, by arranging delays time to control module and the switch power module comprising the first power supply in USB device power supply circuits, wherein, delays time to control module can export the first level signal and the second electrical level signal anti-phase with it to switch power module successively after USB device power supply circuits power on, and the duration of the first level signal is not less than default time of delay, switch power module makes to form open circuit between the first power supply and the USB device of outside according to the first level signal received, and make to form path between the first power supply and described USB device according to the second electrical level signal received, such USB device power supply circuits are when ensureing that USB device normally works and effectively can realize the power management of USB device, the hardware cost of corresponding electronic installation can be reduced, and the operating time of user can be reduced.
Note, above are only preferred embodiment of the present utility model and institute's application technology principle.Skilled person in the art will appreciate that the utility model is not limited to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and protection range of the present utility model can not be departed from.Therefore, although be described in further detail the utility model by above embodiment, but the utility model is not limited only to above embodiment, when not departing from the utility model design, can also comprise other Equivalent embodiments more, and scope of the present utility model is determined by appended right.
Claims (9)
1. USB device power supply circuits, is characterized in that, comprising: delays time to control module and switch power module, and wherein, described switch power module comprises the first power supply;
Described delays time to control module is used for exporting the first level signal and the second electrical level signal anti-phase with it to described switch power module successively after described USB device power supply circuits power on, and the duration of wherein said first level signal is not less than default time of delay;
Described first level signal that described switch power module is used for according to receiving makes to form open circuit between described first power supply and the USB device of outside, and makes to form path between described first power supply and described USB device according to the described second electrical level signal received.
2. USB device power supply circuits according to claim 1, is characterized in that, described USB device power supply circuits also comprise interface module, and described interface module is for connecting described switch power module and described USB device.
3. USB device power supply circuits according to claim 1 and 2, it is characterized in that, described delays time to control module comprises the first resistance, the first capacitor, the second capacitor, timing chip, second source and the level signal output for exporting described first level signal and described second electrical level signal, wherein, timing chip comprises the first pin to the 8th pin;
One end of described first capacitor is connected with the 4th pin of described second source, described timing chip and the 8th pin respectively, the other end of described first capacitor is connected with one end of described first resistance, the second pin of described timing chip and the 6th pin respectively, the other end ground connection of described first resistance, first pin ground connection of described timing chip, 5th pin of described timing chip is by described second capacitor grounding, 3rd pin of described timing chip is connected with described level signal output, and the 7th pin of described timing chip is unsettled.
4. USB device power supply circuits according to claim 3, is characterized in that, described first resistance is adjustable resistance.
5. USB device power supply circuits according to claim 1 and 2, it is characterized in that, described switch power module also comprise the second resistance, the 3rd resistance, the 4th resistance, the first triode, the second triode, for receiving level signal input and the switched power output of the first level signal and second electrical level signal;
One end of described second resistance, one end of described 3rd resistance links together and is connected with described level signal input, the other end of described second resistance is connected with the first pole of described first triode, second pole ground connection of described first triode, 3rd pole of described first triode is connected with one end of described 4th resistance and the first pole of described second triode respectively, second pole of described second triode, the other end of described 3rd resistance links together with the other end of described 4th resistance and is connected with described first power supply, 3rd pole of described second triode is connected with described switched power output.
6. USB device power supply circuits according to claim 5, is characterized in that, described first triode is double pole triode or fet.
7. USB device power supply circuits according to claim 5, is characterized in that, described second triode is double pole triode or fet.
8. USB device power supply circuits according to claim 7, is characterized in that, described second triode is PNP double pole triode or P type fet.
9. an electronic installation, is characterized in that, comprises the USB device power supply circuits according to any one of claim 1-8.
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| CN201520077970.1U CN204362018U (en) | 2015-02-04 | 2015-02-04 | A kind of USB device power supply circuits and electronic installation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656465A (en) * | 2016-03-25 | 2016-06-08 | 深圳市九洲电器有限公司 | GPIO voltage jumping treatment circuit and digital television terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105656465A (en) * | 2016-03-25 | 2016-06-08 | 深圳市九洲电器有限公司 | GPIO voltage jumping treatment circuit and digital television terminal |
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Effective date of registration: 20200401 Address after: 215634 north side of Chengang road and west side of Ganghua Road, Jiangsu environmental protection new material industrial park, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee after: ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL Co.,Ltd. Address before: 201203, room 5, building 690, No. 202 blue wave road, Zhangjiang hi tech park, Shanghai, Pudong New Area Patentee before: WZ TECHNOLOGY Inc. |