CN219512634U - USB module control circuit, USB equipment and electronic equipment - Google Patents
USB module control circuit, USB equipment and electronic equipment Download PDFInfo
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- CN219512634U CN219512634U CN202223526708.XU CN202223526708U CN219512634U CN 219512634 U CN219512634 U CN 219512634U CN 202223526708 U CN202223526708 U CN 202223526708U CN 219512634 U CN219512634 U CN 219512634U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The utility model provides a USB module control circuit, USB equipment and electronic equipment, and belongs to the technical field of electronic circuits. USB module control circuit includes: the control circuit is used for being connected with the USB module and the USB power supply respectively, and the control circuit is used for controlling the USB module to be in a starting-up or shutting-down state; the voltage regulating circuit is respectively connected with the USB module, the USB power supply and the control circuit, and the voltage regulating circuit is used for charging or discharging, so that the state of the control circuit when the USB module is started is consistent with the state of the control circuit when the USB module is shut down. The USB module is controlled to be in a starting-up or shutdown state by the control circuit, and software is not required to be used for assisting the starting-up or shutdown of the USB module. The USB interface is used for switching on and switching off, software is needed for assisting in the prior art, and the problem that the function development of switching on and switching off by using the USB interface is complex is solved.
Description
Technical Field
The utility model relates to the technical field of electronic circuits, in particular to a USB module control circuit, USB equipment and electronic equipment.
Background
At present, the internet of things rapidly develops, the scenes of client mobile equipment are more and more, the use of a USB (Universal Serial Bus ) module by clients is more and more popular, and a USB module generally uses a USB interface to perform operations such as charging, communication, startup and shutdown. However, at present, software is needed to assist in switching on and off the USB module by adopting the USB interface, so that the function development of switching on and off the USB interface is complex.
Disclosure of Invention
The utility model provides a USB module control circuit, USB equipment and electronic equipment, which are used for solving the problem that software is needed to assist in switching on and switching off by adopting a USB interface in the prior art, so that the function development of switching on and switching off by utilizing the USB interface is complex.
In a first aspect, the present utility model provides a USB module control circuit, including: the control circuit is used for being connected with the USB module and the USB power supply respectively, and the control circuit is used for controlling the USB module to be in a starting-up or shutting-down state; the voltage regulating circuit is respectively connected with the USB module, the USB power supply and the control circuit, and is used for regulating the voltage of the control circuit, so that the state of the control circuit when the USB module is started is consistent with the state of the control circuit when the USB module is shut down.
In the embodiment of the utility model, the USB module is controlled to be in the on-off state by the control circuit, software is not required to be used for assisting the on-off of the USB module, and the voltage of the control circuit can be regulated by the voltage regulating circuit, so that the state of the control circuit when the USB module is on is consistent with the state of the control circuit when the USB module is off, the situation that the USB module is on or off due to accidents is avoided, and the reliability of the scheme is improved.
With reference to the foregoing technical solution provided in the first aspect, in some possible implementation manners, the voltage adjusting circuit includes: NPN triode, PMOS tube, first resistor and capacitor; the base electrode of the NPN triode is connected with the drain electrode of the PMOS tube, the emitter electrode of the NPN triode is grounded, and the collector electrode of the NPN triode is connected with the first end of the first resistor; the second end of the first resistor is connected with the first end of the capacitor, the second end of the capacitor is grounded, and the first end of the capacitor is also connected with the first end of the control circuit; the source electrode of the PMOS tube is respectively connected with the external voltage of the USB module, the USB power supply and the second end of the control circuit, the grid electrode of the PMOS tube is connected with the third end of the control circuit, and the drain electrode of the PMOS tube is connected with the first end of the control circuit.
In the embodiment of the utility model, the MOS tube and the NPN triode control the capacitor to charge and discharge, so that the voltage input into the control circuit by the voltage regulating circuit is always stable, and the control circuit is always in the same state.
With reference to the foregoing technical solution of the first aspect, in some possible implementation manners, a source electrode of the PMOS transistor is connected to an external voltage of the USB module through a first diode, and a cathode end of the first diode is connected to the source electrode of the PMOS transistor.
In the embodiment of the utility model, the first diode is arranged between the source electrode of the PMOS tube and the external voltage of the USB module, so that current can be prevented from flowing from the PMOS tube to the external voltage of the USB module, and the circuit is protected. Meanwhile, a power supply with larger voltage in the USB module and the USB power supply can be selected as a power supply access of the source electrode of the PMOS tube.
With reference to the foregoing technical solution of the first aspect, in some possible implementation manners, a source electrode of the PMOS transistor is connected to the USB power supply through a second diode, and an anode end of the second diode is connected to the USB power supply.
In the embodiment of the utility model, the second diode is arranged between the source electrode of the PMOS tube and the USB power supply, so that current can be prevented from flowing from the PMOS tube to the USB power supply, and the circuit is protected. Meanwhile, a power supply with larger voltage in the USB module and the USB power supply can be selected as a power supply access of the source electrode of the PMOS tube.
With reference to the foregoing technical solution of the first aspect, in some possible implementation manners, a drain electrode of the PMOS transistor is connected to the first end of the control circuit through a third diode, and an anode end of the third diode is connected to the drain electrode of the PMOS transistor.
In the embodiment of the utility model, the third diode is arranged between the drain electrode of the PMOS tube and the first end of the control circuit, so that current can be prevented from flowing from the control circuit to the PMOS tube, and meanwhile, the larger voltage in the drain electrode of the PMOS tube and the capacitor can be used as the input voltage of the control circuit.
With reference to the foregoing technical solution of the first aspect, in some possible implementation manners, a first end of the capacitor is connected to the first end of the control circuit through a fourth diode, and an anode end of the fourth diode is connected to the capacitor.
In the embodiment of the utility model, the fourth diode is arranged between the first end of the capacitor and the first end of the control circuit, so that current can be prevented from flowing from the control circuit to the capacitor, and meanwhile, the larger voltage in the drain electrode of the PMOS tube and the capacitor can be used as the input voltage of the control circuit.
With reference to the foregoing technical solution provided in the first aspect, in some possible implementation manners, the control circuit includes: the first NMOS tube, the second NMOS tube and the second resistor; the grid electrode of the first NMOS tube is connected with the first end of the voltage regulating circuit, and the source electrode of the first NMOS tube is grounded; the drain electrode of the first NMOS tube is connected with the USB power supply and the second end of the voltage regulating circuit respectively through the second resistor, and the drain electrode of the first NMOS tube is connected with the third end of the voltage regulating circuit; the grid electrode of the second NMOS tube is connected with the drain electrode of the first NMOS tube, the source electrode of the second NMOS tube is grounded, and the drain electrode of the second NMOS tube is connected with the on-off control end of the USB module.
In the embodiment of the utility model, the state of the drain electrode of the second NMOS tube is controlled by the first NMOS tube, and the voltage input into the grid electrode of the first NMOS tube by the voltage regulating circuit is always kept stable, so that the state of the first NMOS tube is kept unchanged, and the state of the drain electrode of the second NMOS tube is kept consistent, thereby ensuring that the USB module is not started or shut down accidentally, and improving the reliability of the scheme.
In a second aspect, the present utility model provides a USB module control circuit, including: NPN triode, PMOS tube, first resistor, capacitor, first NMOS tube, second NMOS tube; the base electrode of the NPN triode is connected with the drain electrode of the PMOS tube, the emitter electrode of the NPN triode is grounded, and the collector electrode of the NPN triode is connected with the first end of the first resistor; the second end of the first resistor is connected with the first end of the capacitor, the second end of the capacitor is grounded, and the first end of the capacitor is connected with the grid electrode of the first NMOS tube; the source electrode of the PMOS tube is connected with the external voltage of the USB module and the USB power supply respectively, the grid electrode of the PMOS tube is connected with the drain electrode of the first NMOS tube, and the drain electrode of the PMOS tube is connected with the grid electrode of the first NMOS tube by implementing a second resistor; the source electrode of the first NMOS tube is grounded, and the drain electrode of the first NMOS tube is connected with the USB power supply through the second resistor; the grid electrode of the second NMOS tube is connected with the drain electrode of the first NMOS tube, the source electrode of the second NMOS tube is grounded, and the drain electrode of the second NMOS tube is connected with the on-off control end of the USB module.
In a third aspect, the present utility model provides a USB device, comprising: the USB module, the USB power supply, the USB module control circuit provided by the foregoing first aspect embodiment and/or any possible implementation manner of the foregoing first aspect embodiment, or the USB module control circuit provided by the foregoing second aspect embodiment and/or any possible implementation manner of the foregoing second aspect embodiment, where the USB module is connected to the USB power supply through the USB module control circuit, and the USB module control circuit is used for controlling the USB module to be turned on or turned off.
In a fourth aspect, the present utility model provides an electronic device, including the USB device provided in the embodiment of the third aspect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a USB module control circuit according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram illustrating a connection between a USB module control circuit and a USB power supply, USB module according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram illustrating a connection between a USB module control circuit and a USB power supply, a USB module according to another embodiment of the present utility model;
FIG. 4 is a schematic diagram of a USB module control circuit according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram illustrating a connection between a USB module control circuit and a USB power supply, a USB module according to another embodiment of the present utility model;
fig. 6 is a block diagram illustrating a structure of a USB device according to an embodiment of the present utility model.
Detailed Description
The terms "first," "second," and the like are used merely for distinguishing between descriptions and not necessarily for indicating a sequential order, nor are they to be construed as indicating or implying relative importance.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements.
The technical scheme of the present utility model will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic diagram of a USB module control circuit 100 according to an embodiment of the present utility model, including: control circuit 110, voltage regulation circuit 120.
The control circuit 110 is connected to the USB module and the USB power supply, respectively, and the control circuit 110 is used for controlling the USB module to be in a power-on or power-off state.
The voltage adjusting circuit 120 is respectively connected with the USB module, the USB power supply and the control circuit 110, and the voltage adjusting circuit 120 is used for charging or discharging, so that the state of the control circuit 110 when the USB module is powered on is consistent with the state of the control circuit 110 when the USB module is powered off.
The control circuit 110 controls the USB module to be in a power-on or power-off state, software is not required to be used for assisting in powering on or power-off of the USB module, and the voltage regulating circuit 120 charges or discharges the USB module, so that the state of the control circuit 110 when the USB module is in the power-on state is consistent with the state of the control circuit 110 when the USB module is in the power-off state, the condition that the USB module is powered on or power-off accidentally is not caused, and the reliability of the scheme is improved.
In one embodiment, the voltage regulating circuit 120 includes: NPN triode, PMOS tube, first resistance, electric capacity. For ease of understanding, please refer to fig. 2. Wherein, Q2 is PMOS tube, Q1 is NPN triode, C1 is electric capacity, R1 is first resistance, USB_VBUS is USB power, VDD_EXT is the external voltage of USB module.
As shown in fig. 2, a base of the NPN triode Q1 is connected to a drain of the PMOS transistor Q2, an emitter of the NPN triode Q1 is grounded, and a collector of the NPN triode Q1 is connected to a first end of the first resistor R1. The second end of the first resistor R1 is connected to the first end of the capacitor C1, the second end of the capacitor C1 is grounded, and the first end of the capacitor C1 is further connected to the first end of the control circuit 110. The source electrode of the PMOS tube Q2 is respectively connected with the external voltage of the USB module, the USB power supply and the second end of the control circuit 110, the grid electrode of the PMOS tube Q2 is connected with the third end of the control circuit 110, and the drain electrode of the PMOS tube Q2 is connected with the first end of the control circuit 110.
When the PMOS transistor Q2 is turned off, the USB power supply charges the capacitor C1 through the first resistor R1 to input a voltage to the first terminal of the control circuit 110. When the PMOS transistor Q2 is turned on, the NPN transistor Q1 is turned on, the capacitor C1 discharges through the first resistor R1, and the PMOS transistor Q2 inputs a voltage to the first end of the control circuit 110 through the drain, so that the control circuit 110 is always in the same state.
In order to prevent current from flowing from the PMOS transistor Q2 to the external voltage of the USB module, in one embodiment, as shown in fig. 3, D1 is a first diode, D2 is a second diode, D3 is a third diode, D4 is a fourth diode, the source of the PMOS transistor Q2 is connected to the external voltage of the USB module through the first diode D1, and the cathode of the first diode D1 is connected to the source of the PMOS transistor Q2. By arranging the first diode D1 between the source electrode of the PMOS tube Q2 and the external voltage of the USB module, current can be prevented from flowing from the PMOS tube Q2 to the external voltage of the USB module, and the circuit is protected. Meanwhile, a power supply with larger voltage in the USB module and the USB power supply can be selected as a power supply access of the source electrode of the PMOS tube Q2.
In order to prevent current from flowing from the PMOS transistor Q2 to the USB power supply, in one embodiment, the source of the PMOS transistor Q2 is connected to the USB power supply through the second diode D2, and the anode terminal of the second diode D2 is connected to the USB power supply. By arranging the second diode D2 between the source electrode of the PMOS tube Q2 and the USB power supply, current can be prevented from flowing from the PMOS tube Q2 to the USB power supply, and the circuit is protected. Meanwhile, a power supply with larger voltage in the USB module and the USB power supply can be selected as a power supply access of the source electrode of the PMOS tube Q2.
In order to prevent current from flowing from the control circuit 110 to the PMOS transistor Q2, in one embodiment, the drain of the PMOS transistor Q2 is connected to the first end of the control circuit 110 through the third diode D3, and the anode end of the third diode D3 is connected to the drain of the PMOS transistor Q2. By providing the third diode D3 between the drain of the PMOS transistor Q2 and the first end of the control circuit 110, current can be prevented from flowing from the control circuit 110 to the PMOS transistor Q2, and at the same time, a larger voltage in the drain of the PMOS transistor Q2 and the capacitor C1 can be used as the input voltage of the control circuit 110.
In order to prevent current from flowing from the control circuit 110 to the capacitor C1, in one embodiment, the first terminal of the capacitor C1 is connected to the first terminal of the control circuit 110 through the fourth diode D4, and the anode terminal of the fourth diode D4 is connected to the capacitor C1. By providing the fourth diode D4 between the first terminal of the capacitor C1 and the first terminal of the control circuit 110, current can be prevented from flowing from the control circuit 110 to the capacitor C1, and at the same time, a larger voltage in the drain of the PMOS transistor Q2 and the capacitor C1 can be used as the input voltage of the control circuit 110.
In one embodiment, the control circuit 110 includes: the first NMOS tube, the second NMOS tube and the second resistor R2. For ease of understanding, please refer to fig. 4. Wherein, Q3 is a first NMOS tube, Q4 is a second NMOS tube, R2 is a second resistor, USB_VBUS is a USB power supply, and VDD_EXT is the external voltage of the USB module.
As shown in fig. 4, the gate of the first NMOS transistor Q3 is connected to the first end of the voltage adjusting circuit 120, and the source of the first NMOS transistor Q3 is grounded; the drain electrode of the first NMOS tube Q3 is respectively connected with the USB power supply and the second end of the voltage regulating circuit 120 through a second resistor R2, and the drain electrode of the first NMOS tube Q3 is connected with the third end of the voltage regulating circuit 120; the grid electrode of the second NMOS tube Q4 is connected with the drain electrode of the first NMOS tube Q3, the source electrode of the second NMOS tube Q4 is grounded, and the drain electrode of the second NMOS tube Q4 is connected with the on-off control end of the USB module.
When the USB interface is inserted, the second NMOS tube Q4 is conducted, so that the USB module is started, after that, the first NMOS tube Q3 is conducted, the second NMOS tube Q4 is cut off, and the states of the first NMOS tube Q3 and the second NMOS tube Q4 are not changed any more, thereby ensuring that the USB module is not started or shut down accidentally, and improving the reliability of the scheme.
The state of the control circuit 110 when the USB module is on is consistent with the state of the control circuit 110 when the USB module is off, that is, the first NMOS transistor Q3 in the control circuit 110 is on when the USB module is on and when the USB module is off, and the second NMOS transistor Q4 in the control circuit 110 is off when the USB module is on and when the USB module is off.
For a further understanding of the USB module control circuit 100, please refer to fig. 5. It should be noted that the principle shown in fig. 5 is one of many embodiments of the USB module control circuit 100 according to the present utility model, and thus, the manner shown in fig. 5 should not be construed as limiting the present utility model.
As shown in fig. 5, the USB module control circuit 100 includes an NPN triode, a PMOS tube, a first resistor, a capacitor, a first NMOS tube, a second NMOS tube, and a second resistor. Wherein, Q1 is NPN triode, Q2 is PMOS pipe, Q3 is first NMOS pipe, Q4 is second NMOS pipe, C1 is electric capacity, R1 is first resistance, R2 is second resistance, USB_VBUS is USB power, VDD_EXT is the external voltage of USB module.
The base electrode of the NPN triode Q1 is connected with the drain electrode of the PMOS tube Q2, the emitter electrode of the NPN triode Q1 is grounded, and the collector electrode of the NPN triode Q1 is connected with the first end of the first resistor R1. The collector of NPN triode Q1 is also connected with USB power through resistance R1.
The second end of the first resistor R1 is connected with the first end of the capacitor C1, the second end of the capacitor C1 is grounded, and the first end of the capacitor C1 is connected with the grid electrode of the first NMOS tube Q3; the source electrode of the PMOS tube Q2 is respectively connected with the external voltage of the USB module and the USB power supply, the grid electrode of the PMOS tube Q2 is connected with the drain electrode of the first NMOS tube Q3, and the drain electrode of the PMOS tube Q2 is connected with the grid electrode of the first NMOS tube Q3.
The source electrode of the first NMOS tube Q3 is grounded, the drain electrode of the first NMOS tube Q3 is connected with a USB power supply through a second resistor R2, and the grid electrode of the first NMOS tube Q3 is grounded through a fourth resistor R4.
The grid electrode of the second NMOS tube Q4 is connected with the drain electrode of the first NMOS tube Q3, the source electrode of the second NMOS tube Q4 is grounded, and the drain electrode of the second NMOS tube Q4 is connected with the on-off control end of the USB module.
It can be understood that, in order to protect the circuit, the source of the PMOS transistor Q2 is connected to the external voltage of the USB module through the first diode D1, and the cathode of the first diode D1 is connected to the source of the PMOS transistor Q2.
Similarly, the source electrode of the PMOS tube Q2 is connected with the USB power supply through a second diode D2, and the anode end of the second diode D2 is connected with the USB power supply. The drain of the PMOS transistor Q2 is connected to the first end of the control circuit 110 through a third diode D3, and the anode end of the third diode D3 is connected to the drain of the PMOS transistor Q2. The first terminal of the capacitor C1 is connected to the first terminal of the control circuit 110 through the fourth diode D4, and the anode terminal of the fourth diode D4 is connected to the capacitor C1.
In operation, the USB module control circuit 100 shown in fig. 5, when the USB interface is plugged into another device, the +5v power supply usb_vbus of the USB interface passes through the second diode D2, the second resistor R2 to the second NMOS transistor Q4, vgs (voltage between the source and the gate of the MOS transistor) =5v of the second NMOS transistor Q4, Q4 is turned on, and the signal of the USB module PWRKEY interface is pulled to GND. When the USB module is in a shutdown state, the signal of the PWRKEY interface of the USB module is pulled to the ground, and the USB module is started. When the USB module is in a starting state, the signal of the PWRKEY interface of the USB module is pulled to the ground, and the USB module is powered off.
Vgs=0v of the PMOS transistor Q2, and the PMOS transistor Q2 is turned off, so that the control_out=0v turns off the NPN transistor Q1. The USB_VBUS charges the capacitor C1 through the first resistor R1 and the resistor R3, when the charging voltage of the capacitor C1 reaches Vgs (th) of the first NMOS tube Q3 (the conducting voltage of the Q3) after the charging is completed, the first NMOS tube Q3 is conducted, so that vgs=0V of the second NMOS tube Q4 is conducted, the second NMOS tube Q4 is cut off, a signal of the USB module PWRKEY interface is pulled down to the ground and then becomes suspended, and the USB module is successfully started. The Vgs of the PMOS tube Q2 is < -5V, so that the PMOS tube Q2 is conducted. Because the PMOS transistor Q2 is turned on, the control_out=5v, that is, the NPN triode Q1 is turned on, the C1 discharges to the ground through the first resistor R1, the voltage of the control_out is input to the first NMOS transistor Q3 through the D3, the first NMOS transistor Q3 is kept on, the USB module keeps on and stably operates, and the USB module outputs the external voltage vdd_ext=1.8v.
It is understood that the USB module control circuit 100 described above may also implement a delayed power-on function of the USB module.
When the USB interface is inserted into other devices, the usb_vbus charges the C1 through the first resistor R1 and the resistor R3, so that the resistance-capacitance value of the first resistor R1 and the C1 can be changed to change the time from the charging voltage of the C1 to Vgs (th) of the Q3, thereby achieving the purpose of starting delay of the USB module.
The smaller the resistance value of the first resistor R1 and the larger the capacitance value of the C1, the longer the time from the charging voltage of the C1 to Vgs (th) of the first NMOS transistor Q3.
In the inserted USB state, the USB module can be normally powered off. After the USB module is powered on, when the USB module performs a power-off operation, the USB module outputs an external power supply vdd_ext=0v, and the PMOS transistor Q2 is turned on, so that the control_out=usb_vbus=5v, the first NMOS transistor Q3 is turned on, the second NMOS transistor Q4 is turned off, and the signal of the PWRKEY interface of the USB module is not pulled to GND, so that the USB module is powered on again.
After the USB module is started, the USB is plugged in and pulled OUT, the USB is pulled OUT, USB_VBUS=0V and VDD_EXT=1.8V are pulled OUT, and as the PMOS tube Q2 is conducted, the control_OUT=1.8V, namely the grid voltage of the first NMOS tube Q3 is 1.8V, so that the first NMOS tube Q3 is conducted, the second NMOS tube Q4 is cut off, and the signal of the PWRKEY interface of the USB module cannot be pulled to GND to trigger the shutdown. When the USB is plugged in again, the usb_vbus=5v, because the usb_vbus voltage is greater than vdd_ext, the PMOS transistor Q2 is turned on, so that the drain output voltage of the PMOS transistor Q2 is control_out=5v, the first NMOS transistor Q3 is turned on, the second NMOS transistor Q4 is turned off, and the module PWRKEY signal is not pulled to GND to trigger shutdown.
Referring to fig. 6, fig. 6 is a block diagram of a USB device according to an embodiment of the present utility model, where the USB device 10 includes: USB module control circuit 100, USB module 200, USB power 300.
The USB module 200 is connected to the USB power supply 300 through the USB module control circuit 100, and the USB module control circuit 100 is used for controlling the USB module 200 to be powered on or powered off.
The specific implementation and principle of the USB module control circuit 100 are described in the foregoing, and are not described herein for brevity.
The USB device 10 may be any kind of electronic device, as long as it has a USB interface, and needs to implement a power-on function through the USB interface.
The embodiment of the utility model also provides electronic equipment comprising the USB equipment. Any type of electronic device may be used as the electronic device, so long as the electronic device includes a USB device having a USB interface and requiring a power-on function through the USB interface.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. A USB module control circuit, comprising:
the control circuit is respectively connected with the USB module and the USB power supply and is used for controlling the USB module to be in a starting-up or shutdown state;
the voltage regulating circuit is respectively connected with the USB module, the USB power supply and the control circuit and is used for regulating the voltage of the control circuit so that the state of the control circuit when the USB module is started is consistent with the state of the control circuit when the USB module is shut down.
2. The USB module control circuit of claim 1, wherein the voltage regulation circuit comprises:
NPN triode, PMOS tube, first resistor and capacitor;
the base electrode of the NPN triode is connected with the drain electrode of the PMOS tube, the emitter electrode of the NPN triode is grounded, and the collector electrode of the NPN triode is connected with the first end of the first resistor;
the second end of the first resistor is connected with the first end of the capacitor, the second end of the capacitor is grounded, and the first end of the capacitor is also connected with the first end of the control circuit;
the source electrode of the PMOS tube is respectively connected with the external voltage of the USB module, the USB power supply and the second end of the control circuit, the grid electrode of the PMOS tube is connected with the third end of the control circuit, and the drain electrode of the PMOS tube is connected with the first end of the control circuit.
3. The USB module control circuit of claim 2, wherein a source of the PMOS is connected to an external voltage of the USB module through a first diode, and a cathode of the first diode is connected to the source of the PMOS.
4. The USB module control circuit of claim 2, wherein a source of the PMOS is connected to the USB power supply through a second diode, and an anode terminal of the second diode is connected to the USB power supply.
5. The USB module control circuit of claim 2, wherein a drain of the PMOS transistor is connected to the first end of the control circuit through a third diode, and an anode of the third diode is connected to the drain of the PMOS transistor.
6. The USB module control circuit of claim 2, wherein a first terminal of the capacitor is connected to the first terminal of the control circuit through a fourth diode, and an anode terminal of the fourth diode is connected to the capacitor.
7. The USB module control circuit of claim 1, wherein the control circuit comprises:
the first NMOS tube, the second NMOS tube and the second resistor;
the grid electrode of the first NMOS tube is connected with the first end of the voltage regulating circuit, and the source electrode of the first NMOS tube is grounded; the drain electrode of the first NMOS tube is connected with the USB power supply and the second end of the voltage regulating circuit respectively through the second resistor, and the drain electrode of the first NMOS tube is connected with the third end of the voltage regulating circuit;
the grid electrode of the second NMOS tube is connected with the drain electrode of the first NMOS tube, the source electrode of the second NMOS tube is grounded, and the drain electrode of the second NMOS tube is connected with the on-off control end of the USB module.
8. A USB module control circuit, comprising:
the control circuit is respectively connected with the USB module and the USB power supply and is used for controlling the USB module to be in a starting-up or shutdown state; wherein the control circuit includes: the first NMOS tube, the second NMOS tube and the second resistor;
the voltage regulating circuit is respectively connected with the USB module, the USB power supply and the control circuit and is used for regulating the voltage of the control circuit so that the state of the control circuit when the USB module is started is consistent with the state of the control circuit when the USB module is shut down; the voltage regulating circuit includes: NPN triode, PMOS tube, first resistor and capacitor;
the base electrode of the NPN triode is connected with the drain electrode of the PMOS tube, the emitter electrode of the NPN triode is grounded, and the collector electrode of the NPN triode is connected with the first end of the first resistor;
the second end of the first resistor is connected with the first end of the capacitor, the second end of the capacitor is grounded, and the first end of the capacitor is connected with the grid electrode of the first NMOS tube;
the source electrode of the PMOS tube is respectively connected with the external voltage of the USB module and the USB power supply, the grid electrode of the PMOS tube is connected with the drain electrode of the first NMOS tube, and the drain electrode of the PMOS tube is connected with the grid electrode of the first NMOS tube;
the source electrode of the first NMOS tube is grounded, and the drain electrode of the first NMOS tube is connected with the USB power supply through the second resistor;
the grid electrode of the second NMOS tube is connected with the drain electrode of the first NMOS tube, the source electrode of the second NMOS tube is grounded, and the drain electrode of the second NMOS tube is connected with the on-off control end of the USB module.
9. A USB device, comprising:
a USB module;
a USB power supply;
the USB module control circuit of any one of claims 1-8, wherein the USB module is connected to a USB power supply through the USB module control circuit, and the USB module control circuit is configured to control the USB module to be turned on or off.
10. An electronic device comprising a USB device according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223526708.XU CN219512634U (en) | 2022-12-27 | 2022-12-27 | USB module control circuit, USB equipment and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223526708.XU CN219512634U (en) | 2022-12-27 | 2022-12-27 | USB module control circuit, USB equipment and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219512634U true CN219512634U (en) | 2023-08-11 |
Family
ID=87527577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223526708.XU Active CN219512634U (en) | 2022-12-27 | 2022-12-27 | USB module control circuit, USB equipment and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219512634U (en) |
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2022
- 2022-12-27 CN CN202223526708.XU patent/CN219512634U/en active Active
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