CN108932139A - Automatic boot circuit and electronic equipment - Google Patents
Automatic boot circuit and electronic equipment Download PDFInfo
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- CN108932139A CN108932139A CN201810650015.0A CN201810650015A CN108932139A CN 108932139 A CN108932139 A CN 108932139A CN 201810650015 A CN201810650015 A CN 201810650015A CN 108932139 A CN108932139 A CN 108932139A
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- 238000001514 detection method Methods 0.000 claims abstract description 33
- 239000003990 capacitor Substances 0.000 claims description 37
- 230000000087 stabilizing effect Effects 0.000 claims description 4
- 230000037431 insertion Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 101000941170 Homo sapiens U6 snRNA phosphodiesterase 1 Proteins 0.000 description 7
- 102100031314 U6 snRNA phosphodiesterase 1 Human genes 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/4401—Bootstrapping
- G06F9/4411—Configuring for operating with peripheral devices; Loading of device drivers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Security & Cryptography (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a kind of automatic boot circuit and electronic equipments.Automatic boot circuit of the present invention includes detection module and energy supply control module；The detection module includes first switch unit and USB detection unit, and when the USB detection unit detects USB flash disk access, the first power supply provides driving voltage through the first switch unit for the energy supply control module；The energy supply control module includes second switch unit and power supply unit, when the second switch unit detects the driving voltage, connects the connection between said supply unit and load, said supply unit is the load supplying.By using simple component and line, the purpose that insertion USB flash disk is detected and is switched on automatically, the advantage that there is fast response time, save USB flash disk detection I/O port are realized.
Description
Technical Field
The invention relates to the field of hardware equipment, in particular to an automatic starting circuit and electronic equipment.
Background
The usb flash disk is a common electronic storage device, and more electronic products support external usb flash disks. At present, many electronic products can directly read files in a U disk after the U disk is plugged, for example, for audio and video equipment, many electronic products have USB sources, and the audio and video files in the U disk can be directly played after the U disk is plugged. However, if the electronic product is in a standby state, after the usb disk is inserted, the file in the usb disk still needs to be read after the electronic product is powered on, and the electronic product cannot be directly powered on to be in a working state.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide an automatic startup circuit and electronic equipment, and aims to solve the technical problem that in the prior art, when a load is in a standby state, a USB flash disk still needs to be started after being inserted.
In order to achieve the above object, the present invention provides an automatic power-on circuit, which includes a detection module and a power control module;
specifically, the detection module comprises a first switch unit and a USB detection unit, and when the USB detection unit detects that a USB disk is accessed, a first power supply provides a driving voltage for the power supply control module through the first switch unit; the power supply control module comprises a second switch unit and a power supply unit, when the second switch unit detects the driving voltage, the connection between the power supply unit and a load is switched on, and the power supply unit supplies power to the load.
Preferably, the first switch unit includes a first triode, a first resistor and a second resistor; an emitting electrode of the first triode is connected with a first power supply, a base electrode of the first triode is connected with a first end of the first resistor, and a collector electrode of the first triode is connected with the second switch unit; the second end of the first resistor is connected with the USB detection unit; the first end of the second resistor is connected with the emitting electrode of the first triode, and the second end of the second resistor is connected with the first end of the first resistor.
Preferably, the first switch unit further includes a first diode and a third resistor, an anode of the first diode is connected to the first power supply, a cathode of the first diode is connected to a first end of the third resistor, and a second end of the third resistor is connected to an emitter of the first triode.
Preferably, the first switch unit further includes a zener diode and a first capacitor; the cathode of the voltage stabilizing diode is connected with the second end of the third resistor, and the anode of the voltage stabilizing diode is grounded; and the first end of the first capacitor is connected with the second end of the third resistor, and the second end of the first capacitor is grounded.
Preferably, the USB detection unit includes a first diode and a USB interface, an anode of the second diode is connected to a second power supply, a cathode of the second diode is connected to the USB interface, and a cathode of the second diode is further connected to the first switch unit.
Preferably, the power supply unit includes an MOS transistor, a fourth resistor, and a fifth resistor; the source electrode of the MOS tube is connected with a third power supply, the grid electrode of the MOS tube is connected with the first end of the fourth resistor, and the drain electrode of the MOS tube is connected with the load; a second end of the fourth resistor is connected with the second switch unit; and the first end of the fifth resistor is connected with the third power supply, and the second end of the fifth resistor is connected with the first end of the fourth resistor.
Preferably, the power supply unit further includes a second capacitor and a third capacitor; the first end of the second capacitor is connected with the source electrode of the MOS tube, and the second end of the second capacitor is connected with the grid electrode of the MOS tube; the first end of the third capacitor is connected with the drain electrode of the MOS tube, and the second end of the third capacitor is grounded.
Preferably, the second switch unit includes a second triode and a sixth resistor, a collector of the second triode is connected to the power supply unit, a base of the second triode is connected to a first end of the sixth resistor, and a second end of the sixth resistor is connected to the first switch unit.
Preferably, the second switch unit further includes a seventh resistor and a fourth capacitor, a first end of the seventh resistor is connected to a first end of the sixth resistor, a second end of the seventh resistor is grounded, a first end of the fourth capacitor is connected to a first end of the sixth resistor, and a second end of the fourth capacitor is grounded.
The invention also provides electronic equipment which comprises the automatic starting circuit.
When the USB detection unit detects that the USB flash disk is accessed, a first power supply provides driving voltage for the power supply control module through the first switch unit; when the second switch unit detects the driving voltage, the power supply unit is connected with the load, the power supply unit supplies power to the load, the purpose of automatically detecting and starting the USB flash disk is achieved, and the USB flash disk drive has the advantages of being high in response speed and saving USB flash disk detection IO ports.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a functional block diagram of an embodiment of an auto-on circuit of the present invention;
fig. 2 is a schematic structural diagram of an auto-boot circuit according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Detection module | C1～C4 | First to fourth capacitors |
| 200 | Power supply control module | Q1～Q2 | First to second triodes |
| 110 | First switch unit | D1～D2 | First to second diodes |
| 120 | USB detection unit | VCC_12V | A first power supply |
| 210 | Second switch unit | USB_5V2 | Second power supply |
| 220 | Power supply unit | VCC_3V3 | Third power supply |
| R1～R7 | First to seventh resistors | SYS_3V3 | Fourth power supply |
| ZD1 | Diode of voltage regulator tube | USB1 | USB interface |
| VT1 | MOS tube | RL1 | Load(s) |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, in an embodiment, the circuit includes a detection module 100 and a power control module 200.
Specifically, the detection module 100 includes a first switch unit 110 and a USB detection unit 120, and when the USB detection unit 120 detects that a USB disk is plugged in, a first power VCC _12V provides a driving voltage for the power control module 200 through the first switch unit 110; the power control module 200 includes a second switching unit 210 and a power supply unit 220, when the second switching unit 210 detects the driving voltage, the connection between the power supply unit 220 and a load RL1 is switched on, and the power supply unit 220 supplies power to the load RL 1.
It can be understood that when the load RL1 is in standby, after the usb disk is connected, the power supply of the load RL1 can be directly recovered through the above circuit, so that the load RL1 is in a working state, thereby achieving the purpose of automatic startup.
When the USB detection unit detects that the USB flash disk is accessed, a first power supply provides driving voltage for the power supply control module through the first switch unit; when the second switch unit detects the driving voltage, the power supply unit is connected with the load, the power supply unit supplies power to the load, the purpose of automatically detecting and starting the USB flash disk is achieved, and the USB flash disk drive has the advantages of being high in response speed and saving USB flash disk detection IO ports.
Referring to fig. 2, further, the first switch unit 110 includes a first transistor Q1, a first resistor R1, and a second resistor R2; an emitter of the first transistor Q1 is connected to a first power source VCC _12V, a base of the first transistor Q1 is connected to a first end of the first resistor R1, and a collector of the first transistor Q1 is connected to the second switching unit 210; a second end of the first resistor R1 is connected to the USB detection unit 120; a first terminal of the second resistor R2 is connected to the emitter of the first transistor Q1, and a second terminal of the second resistor R2 is connected to the first terminal of the first resistor R1.
It should be noted that the first resistor R1 and the second resistor R2 are voltage dividing resistors, in this embodiment, the resistance of the first resistor R1 is 20K Ω, and the resistance of the second resistor R2 is 22K Ω.
Further, the first switch unit 110 further includes a first diode D1 and a third resistor R3, an anode of the first diode D1 is connected to the first power VCC _12V, a cathode of the first diode D1 is connected to a first end of the third resistor R3, and a second end of the third resistor R3 is connected to an emitter of the first transistor Q1.
It can be understood that the first diode D1 is a schottky diode for preventing current from flowing backward, the third resistor R3 is a current limiting resistor, and in this embodiment, the resistance of the third resistor R3 is 3.3K Ω.
Further, the first switch unit 110 further includes a zener diode ZD1 and a first capacitor C1; the cathode of the zener diode ZD1 is connected to the second end of the third resistor R3, and the anode of the zener diode ZD1 is grounded; the first end of the first capacitor C1 is connected to the second end of the third resistor R3, and the second end of the first capacitor C1 is grounded.
In this embodiment, the voltage value of the zener diode ZD1 is 6.2V.
In this embodiment, the USB detecting unit 120 includes a second diode D2 and a USB interface USB1, an anode of the second diode D2 is connected to a second power source USB _5V2, a cathode of the second diode D2 is connected to the USB interface USB1, and a cathode of the second diode D2 is further connected to the first switch unit 110.
It can be understood that when the load RL1 is in the standby state, the first power supply VCC _12V and the second power supply USB _5V2 are normally powered.
It should be noted that when a USB disk is inserted, the USB disk is connected to the USB interface USB1, the second power supply USB _5V2 supplies power to the USB disk, and when no USB disk is inserted, the USB interface USB1 is disconnected from the USB disk.
The second diode D2 is a schottky diode, when the usb flash drive is not connected, the zener diode ZD1 clamps the emitter voltage Ve of the first triode Q1 at 6.2V, and since the reverse bias of the second diode D2 is cut off and the connection among the first resistor R1, the second resistor R2 and the second diode D2 is in a cut-off state, the base voltage Vb of the first triode Q1 is also 6.2V, and the first triode Q1 is cut off. When a USB flash disk is accessed, the second power supply USB _5V2 supplies power to the USB flash disk through the second diode D2, and the tube voltage drop of the second diode D2 is about 0.2V, so that the voltage across the USB interface USB1 is about 5V. The emitter voltage Ve of the first triode Q1 is still 6.2V, the emitter of the first triode Q1 and the USB1 are divided by the second resistor R2 and the first resistor R1, and the first triode Q1 is turned on, so that the first power VCC _12V provides a driving voltage for the power control module 200 through the third resistor R3 and the first triode Q1.
In this embodiment, the power supply unit 220 includes a MOS transistor VT1, a fourth resistor R4, and a fifth resistor R5; the source of the MOS transistor VT1 is connected to a third power source VCC _3V3, the gate of the MOS transistor VT1 is connected to the first end of the fourth resistor R4, and the drain of the MOS transistor VT1 is connected to the load RL 1; a second end of the fourth resistor R4 is connected to the second switching unit 210; a first terminal of the fifth resistor R5 is connected to the third power VCC _3V3, and a second terminal of the fifth resistor R5 is connected to a first terminal of the fourth resistor R4.
It is understood that the third power VCC _3V3 supplies power normally when the load RL1 is in a standby state.
It should be noted that the fourth resistor R4 and the fifth resistor R5 are voltage dividing resistors, in this embodiment, the resistance of the fourth resistor R4 is 100K Ω, and the resistance of the fifth resistor R5 is 470K Ω.
In a specific implementation, the fourth power supply SYS _3V3 supplies power to the load RL 1.
In this embodiment, the power supply unit 220 further includes a second capacitor C2 and a third capacitor C3; a first end of the second capacitor C2 is connected with the source of the MOS transistor VT1, and a second end of the second capacitor C2 is connected with the gate of the MOS transistor VT 1; the first end of the third capacitor C3 is connected to the drain of the MOS transistor VT1, and the second end of the third capacitor C3 is grounded.
In this embodiment, the second switching unit 210 includes a second transistor Q2 and a sixth resistor R6, a collector of the second transistor Q2 is connected to the power supply unit 220, a base of the second transistor Q2 is connected to a first end of the sixth resistor R6, and a second end of the sixth resistor R6 is connected to the first switching unit 110.
Further, the second switch unit 210 further includes a seventh resistor R7 and a fourth capacitor C4, a first end of the seventh resistor R7 is connected to a first end of the sixth resistor R6, a second end of the seventh resistor R7 is grounded, a first end of the fourth capacitor C4 is connected to a first end of the sixth resistor R6, and a second end of the fourth capacitor C4 is grounded.
When the usb flash disk is not connected, the voltage of the sixth resistor R6 is 0V when the first triode Q1 is turned off, the second triode Q2 is turned off, the gate voltage Vg of the MOS transistor VT1 is 3.3V, the MOS transistor VT1 is also in an off state, and the fourth power supply SYS _3V3 does not output. When the usb disk is connected, the first power source VCC _12V provides a driving voltage for the power control module 200, the second triode Q2 is turned on, the third power source VCC _3V3 provides a bias for the MOS transistor VT1 through the voltage division of the fifth resistor R5, the fourth resistor R4 and the voltage drop of the second triode Q2, so that the MOS transistor VT1 is turned on, and the fourth power source SYS _3Y3 has an output to supply power to the load RL1, thereby achieving the purpose of booting.
The automatic starting circuit comprises a detection module and a power supply control module; the detection module comprises a first switch unit and a USB detection unit, and when the USB detection unit detects that the USB flash disk is accessed, a first power supply provides driving voltage for the power supply control module through the first switch unit; the power supply control module comprises a second switch unit and a power supply unit, when the second switch unit detects the driving voltage, the connection between the power supply unit and a load is switched on, and the power supply unit supplies power to the load. By adopting simple components and parts and connecting wires, the purposes of automatically detecting the inserted USB flash disk and starting the USB flash disk are achieved, and the USB flash disk has the advantages of high response speed and saving USB flash disk detection IO ports.
The invention also provides an electronic device, which comprises the automatic starting circuit, wherein the circuit structure of the automatic starting circuit of the electronic device can refer to the embodiment and is not described again; it can be understood that, because the electronic device of the embodiment adopts the technical scheme of the auto-on circuit, the electronic device has all the above beneficial effects; it should be understood that the electronic device may be a smart phone, a tablet computer, a smart television, and the like, which is not limited in this embodiment.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An automatic starting circuit is characterized by comprising a detection module and a power supply control module; wherein,
the detection module comprises a first switch unit and a USB detection unit, and when the USB detection unit detects that a USB flash disk is accessed, a first power supply provides driving voltage for the power supply control module through the first switch unit;
the power supply control module comprises a second switch unit and a power supply unit, when the second switch unit detects the driving voltage, the connection between the power supply unit and a load is switched on, and the power supply unit supplies power to the load.
2. The auto-on circuit of claim 1, wherein the first switching unit comprises a first transistor, a first resistor, and a second resistor; wherein,
an emitting electrode of the first triode is connected with a first power supply, a base electrode of the first triode is connected with a first end of the first resistor, and a collector electrode of the first triode is connected with the second switch unit;
the second end of the first resistor is connected with the USB detection unit;
the first end of the second resistor is connected with the emitting electrode of the first triode, and the second end of the second resistor is connected with the first end of the first resistor.
3. The auto-on circuit of claim 2, wherein the first switching unit further comprises a first diode and a third resistor, an anode of the first diode is connected to the first power source, a cathode of the first diode is connected to a first terminal of the third resistor, and a second terminal of the third resistor is connected to an emitter of the first transistor.
4. The auto-on circuit of claim 2 or 3, wherein the first switching unit further comprises a zener diode and a first capacitor; the cathode of the voltage stabilizing diode is connected with the second end of the third resistor, and the anode of the voltage stabilizing diode is grounded; and the first end of the first capacitor is connected with the second end of the third resistor, and the second end of the first capacitor is grounded.
5. The auto-on circuit of claim 1, wherein the USB detection unit comprises a second diode and a USB interface, an anode of the second diode is connected to a second power source, a cathode of the second diode is connected to the USB interface, and a cathode of the second diode is further connected to the first switch unit.
6. The auto-on circuit of claim 1, wherein the power supply unit comprises a MOS transistor, a fourth resistor, and a fifth resistor; the source electrode of the MOS tube is connected with a third power supply, the grid electrode of the MOS tube is connected with the first end of the fourth resistor, and the drain electrode of the MOS tube is connected with the load; a second end of the fourth resistor is connected with the second switch unit; and the first end of the fifth resistor is connected with the third power supply, and the second end of the fifth resistor is connected with the first end of the fourth resistor.
7. The auto-on circuit of claim 6, wherein the power supply unit further comprises a second capacitor and a third capacitor; the first end of the second capacitor is connected with the source electrode of the MOS tube, and the second end of the second capacitor is connected with the grid electrode of the MOS tube; the first end of the third capacitor is connected with the drain electrode of the MOS tube, and the second end of the third capacitor is grounded.
8. The auto-on circuit of claim 1, wherein the second switching unit comprises a second transistor and a sixth resistor, a collector of the second transistor is connected to the power supply unit, a base of the second transistor is connected to a first terminal of the sixth resistor, and a second terminal of the sixth resistor is connected to the first switching unit.
9. The auto-on circuit of claim 8, wherein the second switch unit further comprises a seventh resistor and a fourth capacitor, a first terminal of the seventh resistor is connected to a first terminal of the sixth resistor, a second terminal of the seventh resistor is grounded, a first terminal of the fourth capacitor is connected to a first terminal of the sixth resistor, and a second terminal of the fourth capacitor is grounded.
10. An electronic device comprising the auto-on circuit of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810650015.0A CN108932139A (en) | 2018-06-21 | 2018-06-21 | Automatic boot circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810650015.0A CN108932139A (en) | 2018-06-21 | 2018-06-21 | Automatic boot circuit and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN108932139A true CN108932139A (en) | 2018-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810650015.0A Pending CN108932139A (en) | 2018-06-21 | 2018-06-21 | Automatic boot circuit and electronic equipment |
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| Country | Link |
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| CN (1) | CN108932139A (en) |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181204 |
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| RJ01 | Rejection of invention patent application after publication |